Re: Blank page when native DLL used
Hi Chuck, Nope, I just verified, I made no changes to server.xml at all... in fact, the only thing I did do was take all the preinstalled applications and remove them from webapps... I'd be surprised to learn it, but could that be the problem somehow? Thanks, Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) All you could possibly want is here: zammetti.com Caldarale, Charles R wrote: From: Frank W. Zammetti [mailto:fzli...@omnytex.com] Subject: Re: Blank page when native DLL used 32-bit, and I re-confirmed I have the right download (which seems obvious anyway given that Tomcat picks it up and starts running with it, but you never know). You didn't happen to disable the APR listener in server.xml, did you? That might contribute to the observed symptoms. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 4128 (20090603) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Blank page when native DLL used
That's correct, root too... I tried adding all the webapps back in anyway to no avail... the URL I know is correct because without the DLL, it gets me my page as expected, but when I drop the DLL in and just hit refresh, I get the blank page (I also confirmed there was no trailing slash both times to be extra sure). I can of course hit refresh all day long without the DLL (the JSP renders the current time so I know it's properly being refreshed). Well, if I'm the only one that's ever reported this then no big deal, I'm perfectly happy assuming it's something on my machine (or me doing something stupid that I just can't catch). This is just for development so not a problem at all. If others see this though, maybe then it might be indicative of an actual problem. Take care, Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) All you could possibly want is here: zammetti.com Caldarale, Charles R wrote: From: Frank W. Zammetti [mailto:fzli...@omnytex.com] Subject: Re: Blank page when native DLL used the only thing I did do was take all the preinstalled applications and remove them from webapps... Including ROOT? If you don't have a default webapp deployed, you will get a blank page back if the URL can't be matched against any of the deployed webapps. (This is true with and without tcnative-1.dll available.) Note that the browser may display an old copy of the Tomcat home page if it has one lying around; hitting refresh will get rid of that. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 4129 (20090604) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Blank page when native DLL used
Hi Charles, JVM info: java version 1.6.0_11 Java(TM) SE Runtime Environment (build 1.6.0_11-b03) Java HotSpot(TM) Client VM (build 11.0-b16, mixed mode, sharing) 32-bit, and I re-confirmed I have the right download (which seems obvious anyway given that Tomcat picks it up and starts running with it, but you never know). Thanks, Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) All you could possibly want is here: zammetti.com Caldarale, Charles R wrote: From: Frank W. Zammetti [mailto:fzli...@omnytex.com] Subject: Blank page when native DLL used Hi folks... I'm running Tomcat 6.0.18 on Windows XP and I'm trying to use tcnative-1.dll 1.1.16... I drop the DLL in tomcat/bin and it's picked up at startup as expected... however, trying to access any JSPs on the server results in a blank page. If I remove the DLL everything works fine. JVM version? 32- vs 64-bit JVM/dll mismatch? Anything in the logs? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 4107 (20090527) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Blank page when native DLL used
Hi folks... I'm running Tomcat 6.0.18 on Windows XP and I'm trying to use tcnative-1.dll 1.1.16... I drop the DLL in tomcat/bin and it's picked up at startup as expected... however, trying to access any JSPs on the server results in a blank page. If I remove the DLL everything works fine. Is this a known issue, or has anyone else seen this? It's not the end of the world or anything, I'm more curious than anything really. Thanks, Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) All you could possibly want is here: zammetti.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: What is the difference?
Err, one is correct and one is not :) -version does what you expect: gives you information on the JVM that is executing. Just putting version however is telling the JVM to load a class named version and execute it, which of course it can't find, hence the ClassNotFoundException you see. Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) All you could possibly want is here: zammetti.com Dave Filchak wrote: Curious, What is the difference between java -version and java version? In the first case I get: java -version java version 1.6.0_13 Java(TM) SE Runtime Environment (build 1.6.0_13-b03) Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02, mixed mode) In the second, I get: java version Exception in thread main java.lang.NoClassDefFoundError: version Caused by: java.lang.ClassNotFoundException: version at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) Could not find the main class: version. Program will exit. Dave - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 4076 (20090514) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: job announcement - Software Architect
Eh, we've all done rapid iterative design... it usually goes something like this... 10:34am: I need the logo to be flaming instead of waving, and it has to be done by 11:00am 10:58am: Scratch that, the logo has to fade in and out and it MUST be implemented by 11:15am 11:20am: Please change the site's layout from three fluid columns to two static by noon's product demo 12:22pm: The demo went well, but they want the logo to be a subtle background image, and the layout has to have a header, footer, sidebar and the original three fluid columns. The next demo is at 1:30 so it has to be done by then. By the way, tapid iterative development usually ends in one or more suicides, loss of staff to the local Wal-Mart or any version of Windows Vista. Frank -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog Caldarale, Charles R wrote: From: Leon Rosenberg [mailto:rosenberg.l...@googlemail.com] Subject: Re: job announcement - Software Architect P.S. on a very side note, what is test-driven design and rapid iterative development ? I think that means We don't need no stinkin' requirements. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 3953 (20090321) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: job announcement - Software Architect
Err, that's Rapid or course dunno what tapid is :) -- Frank W. Zammetti Author of Practical Ext JS Projects with Gears (coming soon) and Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects with Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog Frank W. Zammetti wrote: Eh, we've all done rapid iterative design... it usually goes something like this... 10:34am: I need the logo to be flaming instead of waving, and it has to be done by 11:00am 10:58am: Scratch that, the logo has to fade in and out and it MUST be implemented by 11:15am 11:20am: Please change the site's layout from three fluid columns to two static by noon's product demo 12:22pm: The demo went well, but they want the logo to be a subtle background image, and the layout has to have a header, footer, sidebar and the original three fluid columns. The next demo is at 1:30 so it has to be done by then. By the way, tapid iterative development usually ends in one or more suicides, loss of staff to the local Wal-Mart or any version of Windows Vista. Frank - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Record and simulate a web app
+1 to what Christopher said... but, you can save yourself some time: http://javawebparts.sourceforge.net/ More specifically: http://javawebparts.sourceforge.net/javadocs/javawebparts/filter/RequestRecorderFilter.html ...and to go along with that: http://javawebparts.sourceforge.net/javadocs/javawebparts/misc/package-summary.html I think that'll pretty much do as suggested. Frank -- Frank W. Zammetti Author of Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Youssef, On 2/18/2009 2:02 PM, Youssef Mohammed wrote: Sorry if this not directly related to tomcat itself. I have a swing app that communicate with backend thru a web app deployed on tomcat. For testing purposes, we want to be able to record some http responses and later on be able to simulate the same response when it gets the same request ( aka simulating the web sever). All tools we could find only record requests and simulate the client not the sever. Any help/hint is appreciated. thnx This sounds like something you could write yourself as a relatively simple webapp: 1. Write an HTTP recorder filter. Configure it as the first filter that gets run for any request. Wrap the request object with one that records the input stream coming in, say, to a file. Wrap the response with one that records the output to another file. Your request object can link these two files any way it wants. You probably want to do something like use Content-Length + SHA1(request) as a key to the request that you store for later. 2. Run your application through this filter to generate some test data. 3. Write a servlet that does nothing but read requests, hash them, look up the test response from your database of responses, and dump the response back to the client. You'll have to watch out for a few things: 1. The recorded response is not directly playable because it includes things like the status header, which you can't send twice. So you'll have to record the status header and set it appropriately instead of just writing content. 2. Similar to #1, you have to send headers using setHeader() instead of just writing to the output stream, because the output stream is used solely for the response body. 3. If your requests include bodies, you might want to pre-process the requests to account for varying amounts of whitespace, etc. In thinking about #1 and #2 above, I think a change to the recorder is in order: you probably want to store the headers, status code, etc. specially instead of just as text in your recorded file. This will make it easier to play back the response. Hope that helps, - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkmcfiwACgkQ9CaO5/Lv0PBdqQCgs8PYXOm4U6f2oD+ejQVkHvFQ QRMAoJJCjhY8XRJX2n9tMDwjIewvtK27 =6R37 -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org __ Information from ESET Smart Security, version of virus signature database 3865 (20090218) __ The message was checked by ESET Smart Security. http://www.eset.com - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Struts vs JSF (poll?)
Tommy Pham wrote: Johnny, if by chance you manage to find the links to the Tomcat MVC model, would you please send it? I didn't have much success googling it. Not to speak for Johnny, but you're probably having trouble finding anything because there's no such thing as Tomcat MVC, there's simply MVC. It's a pattern, not any specific product. You shouldn't have any problem finding that. Thanks, Tommy Frank -- Frank W. Zammetti Author of Practical Dojo Projects and Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] __ Information from ESET Smart Security, version of virus signature database 3416 (20080904) __ The message was checked by ESET Smart Security. http://www.eset.com - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Struts vs JSF (poll?)
On Tue, August 26, 2008 12:33 pm, Christopher Schultz wrote: With respect to Frank's comments, S2 specifically encourages you to separate your own code from the framework, so that you can even implement your logic as framework-agnostic controllers that are simply auto-filled by the framework. Unit testing couldn't be easier: you don't even need to worry about the servlet API because S2 completely hides it from you (even for things like session attributes). I think that *can* be true... but my observation is that most developers start getting so many marker interfaces and interceptors into the mix, and some start to tie you to the servlet API, that all of a sudden you're in the same mock boat as you are otherwise... I've always thought the S2 claim that Actions are POJOs, while *technically* true (or at least, *can* be technically true) is a little bit of a red herring. However, I'll be fair and admit I haven't done a full-scale S2 project in a real-world environment, so this conclusion is based on a somewhat limited data set. I don't think the situation is any worse than any other framework though. I would encourage you guys to take a deeper look into these frameworks (I know nothing about JSF... I'm sure there's some great stuff in there, too)... I think you'll see that frameworks do actually provide useful services and direction, and aren't just useless plumbing and configuration. I'm very familiar with S1, I've been using it for years and have released a number of extensions to it over that period. I'm also pretty familiar with S2 (I did tech review on Ian's Practical book and have put one or two plugins out there in the wild). I just find S1 doesn't buy me much any more, and in fact gets in the way sometimes for the type of development I do, and I find S2 to be overly complicated in many situations. It's just one man's opinion of course, and I too encourage each person to examine these frameworks on their individual merits and make up your own mind for your specific situation. I'm certainly not going to slam anyone that looks at Struts or JSF and concludes it's right for them... well, maybe I would in the case of JSF :) - -chris Frank -- Frank W. Zammetti Author of Practical Dojo Projects abd Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Struts vs JSF (poll?)
On Tue, August 26, 2008 1:09 pm, David Whitehurst wrote: -snip- But, at the same time I think development managers and architects need to choose the best framework and then tell the newly hired developers that this is what we're using. You, the developer, either accept the choice or not. We can't all be chiefs. I'm in the architect/manager boat myself these days, so I'd be crazy to *not* agree :) I've seen though what happens when you play the ivory tower game and just come down the hill with the stone tablets that say this is what we're doing. Everyone has to have a say IMO... even if some of those opinions don't carry as much weight as others (having your opinion carry more weight is one of the perks of moving up the ladder after all). But at the end of the day, sure, it's us at the top that have to make the decisions and be responsible for them however they turn out, and anyone that doesn't want to be onboard can go disagree with someone elsewhere. And, if it's JSF, I'm firing the first one that tells me that Struts is better. I think like the businessman now. We're all here to write software and once the architecture is chosen, debate's over boys!. I would hope you wouldn't fire them JUST for disagreeing :) So long as they can disagree and still abide by the decision I can live with it. Struts2 for me. I had to vote, LOL :-) Sure... and I have no doubt it does the job nicely for you. David Whitehurst Frank -- Frank W. Zammetti Author of Practical Dojo Projects abd Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog On Tue, August 26, 2008 1:09 pm, David Whitehurst wrote: Frank: I'm an AppFuse fan and while Struts 2 and JSF are an option, I've recently seen two solid applications using Spring Web Flow. I haven't used Web Flow for anything production yet. And, while this was the this vs. that discussion, I do agree that you should encourage developers to make up their own mind. But, at the same time I think development managers and architects need to choose the best framework and then tell the newly hired developers that this is what we're using. You, the developer, either accept the choice or not. We can't all be chiefs. And, if it's JSF, I'm firing the first one that tells me that Struts is better. I think like the businessman now. We're all here to write software and once the architecture is chosen, debate's over boys!. Struts2 for me. I had to vote, LOL :-) David Whitehurst On 8/26/08, Frank W. Zammetti [EMAIL PROTECTED] wrote: On Tue, August 26, 2008 12:33 pm, Christopher Schultz wrote: With respect to Frank's comments, S2 specifically encourages you to separate your own code from the framework, so that you can even implement your logic as framework-agnostic controllers that are simply auto-filled by the framework. Unit testing couldn't be easier: you don't even need to worry about the servlet API because S2 completely hides it from you (even for things like session attributes). I think that *can* be true... but my observation is that most developers start getting so many marker interfaces and interceptors into the mix, and some start to tie you to the servlet API, that all of a sudden you're in the same mock boat as you are otherwise... I've always thought the S2 claim that Actions are POJOs, while *technically* true (or at least, *can* be technically true) is a little bit of a red herring. However, I'll be fair and admit I haven't done a full-scale S2 project in a real-world environment, so this conclusion is based on a somewhat limited data set. I don't think the situation is any worse than any other framework though. I would encourage you guys to take a deeper look into these frameworks (I know nothing about JSF... I'm sure there's some great stuff in there, too)... I think you'll see that frameworks do actually provide useful services and direction, and aren't just useless plumbing and configuration. I'm very familiar with S1, I've been using it for years and have released a number of extensions to it over that period. I'm also pretty familiar with S2 (I did tech review on Ian's Practical book and have put one or two plugins out there in the wild). I just find S1 doesn't buy me much any more, and in fact gets in the way sometimes for the type of development I do, and I find S2 to be overly complicated in many situations. It's just one man's opinion of course, and I too encourage each person to examine these frameworks on their individual merits and make up your own mind for your specific situation. I'm certainly not going to slam anyone that looks at Struts or JSF and concludes it's right for them... well, maybe I would in the case of JSF :) - -chris Frank
Re: Struts vs JSF (poll?)
Being as most of what I do today is RIA development, I've personally found that the ideal solution is to use NO framework at all. I use DWR and just treat everything as method calls. The nice thing about that is you wind up with a very clean and plain structure to your application in the sense that you're thinking in terms of classes and methods, like you do in general server-side anyway. It also makes most of your application highly testable (except where session comes into play, but we tend to try and minimize that usage anyway). You design a proper API, and the fact that you're using it behind a web-based application isn't really relevant (and in fact you can truly slap any front-end on you want without much trouble). I've found that my projects drift towards more of a component-based model naturally doing this, and away from the classic page/action-based model of Struts (which is where we were a few years ago). It becomes much more about events, small, focused bits of functionality, and how it's all put together to form a larger whole. The development cycle I find is much faster, much simpler and the results are far more flexible and extensible. It's in some sense a return to a more bare metal mentality, but it's truly made our lives a whole lot better. I've had to mentor some pretty inexperienced teams and I've seen this approach versus the framework-centric approach with something like Struts, and I've observed it to be much easier to get their brains wrapped around this approach, they come up to speed and are effective faster, and they are more effective than in cases where a full, proper framework was used. So, if the question is Struts vs. JSF, I'm in agreement with Johnny to a large degree: neither is the best answer. And in fact, I second the no framework at all opinion. I suppose if you wanted to consider DWR a framework then I'd say DWR, but it's really just a mechanism, not a framework (it could be something else other than DWR, so long as it presented an RPC view of the world it'd be the same basically). But as far as the true frameworks go, as we've come to understand them over the past few years, my personal opinion is that they serve no purpose any longer when talking about developing modern RIAs, and in fact tend to get in the way more than they help in those situations. I completely realize this isn't the popular opinion (yet), and many people actually disagree quite vehemently, but I've had pretty extensive experience building these types of apps for nearly 10 years now, and that's the mindset I've come to at this point. (I tend not to say this often, because it's usually annoying to me when people do it, but what the hell... I actually blogged about this a little while back: http://www.zammetti.com/blog) Frank -- Frank W. Zammetti Author of Practical Dojo Projects abd Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog Johnny Kewl wrote: - Original Message - From: Tommy Pham [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Sunday, August 24, 2008 7:03 AM Subject: Struts vs JSF (poll?) Hi everyone, This maybe out of scope for this list but I wanted to know more about Struts vs JSF other this old article [1]. Which are are deployed mostly on your TC server(s)/cluster(s)? If any Java developers are on this list, which platform API do you prefer for quick development (to meet deadline), performance, security management (user authentication and level restriction) etc... since both are based on MVC despite their different implementations(?). Since there isn't a JSR for Struts, has Struts been around before JCP is formed? And why is there not a JSR for Struts now (just curious)? As for JSF, which implementation is used by/for your app(s)? Sun/NetBeans? Apache's MyFaces? or Others (please list)? I'm somewhat disappointed Netbeans support for JSF and Struts in that Netbeans bundled libs support used older Apache Commons lib version (even for the current v6.1), although this could be updated but I don't know whether it will break the integration of Netbeans' VWP. Even the tutorial/trails on NetBeans site regarding Struts (although this can be compensated at Struts' web site) is very limited perhaps because of the (biased?) Struts weak integration to favor or push more on JSF/Visual JSF? I need to evaluate my options of API and IDE before I dedicate several projects since the performance of Netbeans is getting worse by every release comparing to Eclipse. As for server, I've decided already ;) TIA, Tommy [1] http://websphere.sys-con.com/node/46516 Use neither... prefer the plain TC MVC model. Struts is really just an implementation of the MVC model in TC JSF is more about trying to make web development feel
Re: DWR [Slightly off topic -- Was Struts vs JSF (poll?)]
to see how you can get to the same basic place in that paradigm too. The difference is again that you're essentially putting an HTTP-specific abstraction in front of your API. I'm never a fan of abstractions unless you can show me there's a true benefit to the added complexity. Sometimes you can convince me, frequently you can't :) Some people are big-time on the REST bandwagon, and that's fine, I just happen to feel DWR is better, if you're working in the Java space at least. Thanks in advance, Ken np, Frank -- Frank W. Zammetti Author of Practical Dojo Projects abd Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog On Aug 24, 2008, at 4:10 PM, Frank W. Zammetti wrote: Being as most of what I do today is RIA development, I've personally found that the ideal solution is to use NO framework at all. I use DWR and just treat everything as method calls. The nice thing about that is you wind up with a very clean and plain structure to your application in the sense that you're thinking in terms of classes and methods, like you do in general server-side anyway. It also makes most of your application highly testable (except where session comes into play, but we tend to try and minimize that usage anyway). You design a proper API, and the fact that you're using it behind a web-based application isn't really relevant (and in fact you can truly slap any front-end on you want without much trouble). I've found that my projects drift towards more of a component-based model naturally doing this, and away from the classic page/action-based model of Struts (which is where we were a few years ago). It becomes much more about events, small, focused bits of functionality, and how it's all put together to form a larger whole. The development cycle I find is much faster, much simpler and the results are far more flexible and extensible. It's in some sense a return to a more bare metal mentality, but it's truly made our lives a whole lot better. I've had to mentor some pretty inexperienced teams and I've seen this approach versus the framework-centric approach with something like Struts, and I've observed it to be much easier to get their brains wrapped around this approach, they come up to speed and are effective faster, and they are more effective than in cases where a full, proper framework was used. So, if the question is Struts vs. JSF, I'm in agreement with Johnny to a large degree: neither is the best answer. And in fact, I second the no framework at all opinion. I suppose if you wanted to consider DWR a framework then I'd say DWR, but it's really just a mechanism, not a framework (it could be something else other than DWR, so long as it presented an RPC view of the world it'd be the same basically). But as far as the true frameworks go, as we've come to understand them over the past few years, my personal opinion is that they serve no purpose any longer when talking about developing modern RIAs, and in fact tend to get in the way more than they help in those situations. I completely realize this isn't the popular opinion (yet), and many people actually disagree quite vehemently, but I've had pretty extensive experience building these types of apps for nearly 10 years now, and that's the mindset I've come to at this point. (I tend not to say this often, because it's usually annoying to me when people do it, but what the hell... I actually blogged about this a little while back: http://www.zammetti.com/blog) Frank -- Frank W. Zammetti Author of Practical Dojo Projects abd Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology (For info: apress.com/book/search?searchterm=zammettiact=search) My look ma, I have a blog too! blog: zammetti.com/blog Johnny Kewl wrote: - Original Message - From: Tommy Pham [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Sunday, August 24, 2008 7:03 AM Subject: Struts vs JSF (poll?) Hi everyone, This maybe out of scope for this list but I wanted to know more about Struts vs JSF other this old article [1]. Which are are deployed mostly on your TC server(s)/cluster(s)? If any Java developers are on this list, which platform API do you prefer for quick development (to meet deadline), performance, security management (user authentication and level restriction) etc... since both are based on MVC despite their different implementations(?). Since there isn't a JSR for Struts, has Struts been around before JCP is formed? And why is there not a JSR for Struts now (just curious)? As for JSF, which implementation is used by/for your app(s)? Sun/NetBeans? Apache's MyFaces? or Others (please list)? I'm
Re: Seeking advice as to what platform/framework to use for developing a tourism/tourist attractions web site
I actually agree with Lyallex quite strongly, I found very little value in *any* of the frameworks out there today, and in fact I'm starting to believe most of them are counterproductive. However, that's not to say I think plain servlets and JSPs is the absolute best answer either... since Ajax is one of the listed requirements I would highly suggest looking at DWR. I've found that DWR, plus a good widget library on the client (ExtJS was my choice until the recent licensing change) was all you need nowadays. I tend to use bits and pieces of Spring too, mostly Spring JDBC because I believe straight JDBC is the right answer and Spring JDBC makes that better, but I'll pick and choose other pieces as the needs come up. But I think DWR is the key. If you're developing a modern RIA, I don't believe there is currently a better option. The really great thing about it is that it leads you quite naturally down a certain architectural path: POJOs on the server, a simple RPC-like mid-tier design, simple, logical coding on the front-end, etc. I've been involved in a massively complex project at work the past two years, one of the biggest success stories in my company's history actually... we started off using Dojo for Ajax and Struts on the server-side... that worked reasonably well... however, for the last 6-9 months we've been developing all the new capabilities in the application with DWR replacing both of those, and it's a world of difference. New developers, some of which have little to no experience in Java web development, are able to pick it up so much quicker, it's so much easier to get things done initially, and troubleshooting is much easier because there's simply less moving parts, and it simply *feels* simpler. We've been able to deal with changing requirements quickly and easily. Being able to see the two approaches in the same application really makes it obvious which is better and why. In fact, most of the newest functionality is done in what I consider the holy grail of approaches: a single JSP design. There's no longer this page-request-response-new page cycle, it simply isn't necessary. Yes, you have to fully buy into this whole RIA thing, and you have to be comfortable doing a lot in Javascript, but if you are I think this is nearly a perfect way to do things. That's just my opinion of course, I know many people don't agree. All I can say is I've got a ton of real-world experience with non-trivial enterprise-class applications that support it. Frank P.S. - Is that your real name by the way Layallex? If so, I've never heard it before, but it's pretty cool!) -- Frank W. Zammetti Author of Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology for info: apress.com/book/search?searchterm=zammettiact=search Java Web Parts - javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! My only partially serious blog: zammetti.com/blog Lyallex wrote: Greetings I guess given the lack of replies that most think this is too OT for this list, well I suppose it is but I couldn't resist answering. Don't Do It That is, don't use any framework at all. Download Tomcat and the relevant J2EE API documentation bundle, then goto the MySQL site and get the driver then go http://commons.apache.org/ and get all sorts of stuff. Finally read http://java.sun.com/blueprints/patterns/catalog.html (maybe this should be the other way around) This really is all you need. learning a framework is an overhead you can do without if you are getting into J2EE. I used to use Struts and JSF and Castor and lot's of other stuff but I found I was spending more time learning how to configure the framework than I was developing. My latest site has most of what you mention and not a framework in site. Follow the patterns, write cohesive POJOs and hide the business logic behind facades. Use the commons stuff, it works, it's free and it's documented (to a degree). I even used to eschew taglibs but I'm a convert now so use them where you can. NEVER put business logic anywhere other than in POJOs (or EJBs if you must) and never do anything other than rendering in jsp's. Use css, everywhere, all the time ... IE 6 is broken but most of the latest browsers are pretty good these days IMHO. div good, table bad (well not quite). Stick to this and you will be writing websites and earning money for the rest of your working life while others struggle to get heir head around the latest bloated XML nightmare config, docubabble latest greatest framework. Madness ? perhaps, but I spend my time learning the Java/J2EE APIs rather than reading framework documentation and I am never out of work. Lights blue touchpaper and retires Good Luck Lyallex On Fri, May 2, 2008 at 11:01 AM, qm westview [EMAIL PROTECTED] wrote: *Hi there,* *I am an application programmer (Java, PHP
Re: [OT] RE: Seeking advice as to what platform/framework to use for developing a tourism/tourist attractions web site
Peter's point is valid though... you could certainly build the site in PHP for example and just drop in a bunch of pre-existing modules for a shopping cart, blog, that sort of thing, then just write some basic PHP pages to tie it all together. For example, my web host has this Fantastico thing on their admin interface where I can pick and choose PHP application just like those mentioned... it automatically does the MySQL setup, creates the directories, does all the required installation, and a minute or so later I have myself a blog, a shopping cart, whatever. That gets installed into my main site's directory structure, so all I'd need to do then is some write some basic PHP to clump all those modules together into some sort of coherent site. If *that's* what the OP was looking for, then Peter's point is valid, there's options besides coding it all from scratch. It's only if someone wants to code it all themselves that your (and my) points come into play. Frank Frank W. Zammetti Author of Practical DWR 2 Projects and Practical JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology for info: apress.com/book/search?searchterm=zammettiact=search Java Web Parts - javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! My look ma, I have a blog too! blog: zammetti.com/blog Lyallex wrote: Peter Never suggested the OP develop carts and such like from scratch really did I. What I said was he should focus on learning the core APIs, that's a little different. Building your own business logic is a requirement whatever framework you use (or don't use). If you can tell me where to find reusable business logic then that will certainly save me time, I'd still want to know how it worked though so black boxes are useless. If, when you know the core you decide to rot your brain and spend frustrating days trying to configure some bloody minded framework then go for it, at least you'll have some idea where to look when it doesn't work (they NEVER work first time in my experience). Anyway OP, hope this little discussion has cleared things up for you :-)) Cheers Lyallex On Fri, May 2, 2008 at 2:48 PM, Peter Crowther [EMAIL PROTECTED] wrote: From: Lyallex [mailto:[EMAIL PROTECTED] Subject: Re: Seeking advice as to what platform/framework to use for developing a tourism/tourist attractions web site Greetings I guess given the lack of replies that most think this is too OT for this list, well I suppose it is but I couldn't resist answering. Don't Do It That is, don't use any framework at all. Many of the OP's requirements are for existing tools. Blog, shopping cart and the like. Developing those from scratch is rather like gathering the coal, clay and iron ore to make your own oven to smelt your own iron ore to make your own axe to cut down your own tree to make your own log cabin. You *can*, and you get a lot of satisfaction from it, but it's a lot easier to spend less time working for someone else, then rent a house. Sure, it might not be quite what you'd build yourself... but you get most of what you want a *lot* quicker. So, to the OP, I'd say: compare the big systems that you mention. Take a tour of each. Install a few. You might spend a couple of weeks, maybe a couple of months doing this. Then pick one and go for it. You'll have your system running - and customers using it - while Lyallex is still building the data access layer for the no-framework one. - Peter - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How can I refresh tomcat in the java code?
Typically when you're generating dynamic content like that, you don't serve it in the same way as a file on the file system does. Instead you usually serve it from memory, or from a database if you had need to store it somewhere. If you deploy within an EAR you'll find that writing to the file system doesn't work as expected, at least within the context of the webapp... you can do it if you tie your EAR to the environment it's running in, i.e., paths and such, but most people will tell you that's a Bad Idea(tm). My point is that you're probably asking the wrong question... I think the right question is how can you serve dynamically-generated content that is transient, i.e., not persisted to the file system. To answer that we'd have to know what kind of content it is, how it's generated, etc. Frank -- Frank W. Zammetti Author of Practical DWR 2 Projects and JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology for info: apress.com/book/search?searchterm=zammettiact=search Java Web Parts - javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! My look ma, I have a blog too! blog: zammetti.com/blog On Wed, April 2, 2008 10:55 am, Guilherme Orioli wrote: I'm developing a system that will generate a file dynamically, and i want to make it possible to be downloaded from server after it's created. The problem is that when i link the file, the response i get is that it doesn't exist. After a few tests we've figured out that if the file existed previously from loading tomcat, it's possible to get the file. So, if i reload tomcat, i can get it... I was wondering if i can refresh the tomcat in the java code. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: How can I refresh tomcat in the java code?
What he said :) FYI, serving PDFs in particular can be a bloody mess because of Acrobat STILL not being able to get their s**t together when it comes to their browser plug-in. I wrote a Wiki entry on the Struts Wiki some time ago that might help: http://wiki.apache.org/struts/ServingPdfDocuments?highlight=%28pdf%29 It's not really specific to Struts, so should help. Frank -- Frank W. Zammetti Author of Practical DWR 2 Projects and JavaScript, DOM Scripting and Ajax Projects and Practical Ajax Projects With Java Technology for info: apress.com/book/search?searchterm=zammettiact=search Java Web Parts - javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! My look ma, I have a blog too! blog: zammetti.com/blog On Wed, April 2, 2008 1:24 pm, Caldarale, Charles R wrote: From: Guilherme Orioli [mailto:[EMAIL PROTECTED] Subject: Re: How can I refresh tomcat in the java code? memoryPDF = new FileOutputStream(test); Don't create a FileOutputStream, use ServletResponse.getOutputStream() instead. Make sure you set the content type to application/pdf, of course. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: IE causes an ORA-00936 error, but not Firefox?
It *might* be enough, if you at least know what parameters are being used, to look in Firebug or some similar tool to see what's being transmitted across the wire... if you're lucky it's something obvious and visible there and you won't have to hunt it down further back on the server. -- Frank W. Zammetti Author of Practical DWR 2 Projects (2008, Apress, ISBN 1-59059-941-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) and Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Fri, March 28, 2008 1:30 pm, Brian Munroe wrote: On Fri, Mar 28, 2008 at 10:27 AM, Frank W. Zammetti [EMAIL PROTECTED] wrote: My first guess (and that's all it is, a guess!) is that you're trying to insert something coming from the client into a SQL query and for whatever reason it's being transmitted differently from IE than FF and is somehow Thanks Frank, Peter Those answers sound logical to me. Now if I can just get my hands on the source -- brian - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: PDF problem on IE from JSP
Jonadan wrote: BTW, is this problem is specific to Tomcat ONLY? Or also occurs in other servers such as JBoss, and so on? FYI, a while ago I wrote a page on the Struts wiki dealing with serving PDFs... while it was meant for Struts, the majority of the information is in fact completely generic and applicable here (Tomcat vs. any other server doesn't matter, most of my issues... I've had the same issues under Tomcat and Websphere). http://wiki.apache.org/struts/ServingPdfDocuments?highlight=%28pdf%29 Frank -- Frank W. Zammetti Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) and Practical DWR 2 Projects (2008, Apress, ISBN 1-59059-941-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how do i compile servlets
Servlets, unlike JSPs, are NOT automatically compiled by the container. You will need to compile your servlets yourself and place the .class files in WEB-INF/classes (or package them into a JAR and put them in WEB-INF/lib). Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Mon, December 31, 2007 11:24 am, Joly M wrote: hello all, i'm calling a servlet on my application. tomcat seems not finding the servlet (error 404). i have noticee that no .class file was created when my web application was deployed . i have configured web.xml file, but i'm not getting any .class file at all. what should i do to get my servlet compiled and running? cheers joly - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbortException / Broken Pipe?!
Ronald Klop wrote: ClientAbortException means the user canceled the download (the 'client aborted'). There is nothing you can do about that on the server. Yeah, that's the answer you'll find most frequently if you spend time Googling for that exception, but anecdotally you'll find that more times than not, there's no evidence of the browser being closed or the client aborting (pressing Stop) while a page is loading. There's definitely something else going on in a great many cases, and I'm at least happy to know that I'm not alone in not having found the real answer yet : Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! Ronald. On Tue Aug 14 15:57:25 CEST 2007 Tomcat Users List users@tomcat.apache.org wrote: Folks; still messing around with an error like this: In our system, we offer customers a service to download files using a servlet. Some weeks ago (more or less when I considered switching to tomcat 6.0), the following error frequently started to show up in my log files: ... java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.jk.common.ChannelSocket.send(ChannelSocket.java:537) at org.apache.jk.common.JkInputStream.endMessage(JkInputStream.java:127) at org.apache.jk.core.MsgContext.action(MsgContext.java:302) at org.apache.coyote.Response.action(Response.java:183) at org.apache.coyote.Response.finish(Response.java:305) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:205) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) at java.lang.Thread.run(Thread.java:619) 14.08.2007 15:38:34 org.apache.jk.common.ChannelSocket processConnection WARNUNG: processCallbacks status 2 ... whereas I see a ClientAbortException caught by my applications exception handling mechanism. So far, I haven't been able to track this down, that's why I am kindly asking you for your skilled advice. What did I do so far trying to get hold of this: - Tomcat runs on a machine in the LAN, fronted by an apache2 httpd. - The error does appear both running tomcat 6.0.13 and 5.5.23. - I initially was using mod_jk 1.2.29 and switched to mod_proxy and Proxy/ProxyReverse setup just to make sure, and the error appears no matter whether using mod_jk or mod_proxy. - Right now, I am using apache2 prefork mpm, played around with different mpms just to be sure it's not an error related to apache2 itself, but this also didn't really change anything. - apache2 logging doesn't show any messages whenever such a ClientAbortException is thrown. - Customers, however, reported that whenever such a situation happened, the files downloaded were either 0k sized or corrupted. And I'm whole-heartedly clueless by now :( Is there anything I forgot to double-check? Using the latest JDK, no tcnative, running Ubuntu Linux 6.06.1. Applied pretty much every solution attempt I could come up with using google, including tweaking the HTTP connector setup in server.xml, removing tcnative, using mod_proxy instead of mod_jk - no success. Does anyone around here have any more ideas on how to get hold of this? Thanks loads in advance and bye, Kristian -- Kristian Rink * http://zimmer428.net * http://flickr.com/photos/z428/ jab: [EMAIL PROTECTED] * icq: 48874445 * fon: ++49 176 2447 2771 One dreaming alone, it will be only a dream; many dreaming together is the beginning of a new reality. (Hundertwasser) - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.11.19/953 - Release Date: 8/14/2007 5:19 PM - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbortException / Broken Pipe?!
Kristian Rink wrote: However, seriously this is a rather bad thing as I am convinced most of our users to possibly make use of a default web browser on their system, having no idea what a browser is, at all... On the other side, having the file transmission terminated / corrupted surely isn't what I would call no ill effect... ;) Does anyone have a smart idea how to compensate for this issue? Your right, I must not have read carefully the first time, I didn't realize there was a corrupt download involved here. Thanks in advance and best regards, Kristian Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbortException / Broken Pipe?!
Just as another tidbit in the pot, I get these errors frequently with Websphere, both with and without a web server in front of it, and also both with and without a proxy involved, so it's definitely not Tomcat-specific, nor is it definitively anything involving a proxy (although both could somehow be contributing factors in this particular case). One thing we did notice is that the problem was more frequent when we started using Dojo... now, I'm not blaming Dojo, but I wonder if maybe its something along the lines of the browser opening a connection to see if a particular JS file is fresh, then determining the local copy is fresh, and instead of properly closing the connection it somehow aborts it incorrectly... that wouldn't in the least surprise me with IE... although you'd expect to see that error all the time, so I don't know, maybe it's the way Dojo's package/import system works. Just an observation though. Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! Rainer Jung wrote: Kristian Rink wrote: Ronald; [Ronald Klop [EMAIL PROTECTED] @ Wed, 15 Aug 2007 09:56:59 +0200 (CEST)] ClientAbortException means the user canceled the download (the 'client aborted'). There is nothing you can do about that on the server. I thought so. However, there are two things: (a) I was unsure whether, in a proxied environment, a ClientAbortException means download canceled by the actual (external) client or by the proxy server (which is directly accessing the backend tomcat). OK, the proxy in your case is a reverse proxy. The exception in the tomcat logs could theretically come from a communication failure back to the reverse proxy, or from a failure from the reverse proxy back to the client=browser. In the latter case, the reverse proxy would not accept any more traffic from the tomcat and thus indirectly lead to the same exception. When using mod_jk, it will log problems during sending back data to the client=browser. That way you would know, on which part of the net the original problem is located. By logging response times in your Apache access log and redundantly in your Tomcat access log (at least until you solved or understood the cause of the problem), you can also find out, how long the response took from the perspective of Apache and of Tomcat, and if the duration is close to some configured timeout interval. The pattern for response times if %D, which means microseconds with Apache httpd and milliseocond swith Tomcat. From the mod_jk log and the access log duration information you might even be able to determine, which requests had the problem (this is not easy and if you've got high load, it's difficult). I would suggest using mod_jk 1.2.25. It will log millisecond timestamps and has a couple further stability improvements. You wrote about version 1.2.29 which does not exist, upgrading should be no problem. JK has a couple of timeouts additionally to the Apache httpd timeout. They are described at http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html (b) In none of the cases I watched so far, some user consciously / actively stopped a download in progress - all reported that either the download finished but ended up with an empty / small / corrupted file or an error message showed up - or nothing happened at all. :( I am not really sure who's to blame for that... :/ I would really try to look at the response handling times, the URLs for which it is happening, the client IPs and User Agent types to check, if there are any obvious patterns. In case you can finally reproduce the problem with low load, you can switch jk log level to debug or even trace. Then the log file will include full packet and header dumps. This is not a good idea for high traffic production though. Regards, Rainer - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbortException / Broken Pipe?!
Have you noticed if this affects IE users and Firefox users equally? I ask because there's a known issue (that I've never seen an actual answer to) where IE causes these exceptions frequently with no ill effect to anything (other than the overhead of handling the exception in the VM on the server). I'd bet a box of donuts that it only happens for IE users. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Tue, August 14, 2007 9:57 am, Kristian Rink wrote: Folks; still messing around with an error like this: In our system, we offer customers a service to download files using a servlet. Some weeks ago (more or less when I considered switching to tomcat 6.0), the following error frequently started to show up in my log files: ... java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.jk.common.ChannelSocket.send(ChannelSocket.java:537) at org.apache.jk.common.JkInputStream.endMessage(JkInputStream.java:127) at org.apache.jk.core.MsgContext.action(MsgContext.java:302) at org.apache.coyote.Response.action(Response.java:183) at org.apache.coyote.Response.finish(Response.java:305) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:205) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) at java.lang.Thread.run(Thread.java:619) 14.08.2007 15:38:34 org.apache.jk.common.ChannelSocket processConnection WARNUNG: processCallbacks status 2 ... whereas I see a ClientAbortException caught by my applications exception handling mechanism. So far, I haven't been able to track this down, that's why I am kindly asking you for your skilled advice. What did I do so far trying to get hold of this: - Tomcat runs on a machine in the LAN, fronted by an apache2 httpd. - The error does appear both running tomcat 6.0.13 and 5.5.23. - I initially was using mod_jk 1.2.29 and switched to mod_proxy and Proxy/ProxyReverse setup just to make sure, and the error appears no matter whether using mod_jk or mod_proxy. - Right now, I am using apache2 prefork mpm, played around with different mpms just to be sure it's not an error related to apache2 itself, but this also didn't really change anything. - apache2 logging doesn't show any messages whenever such a ClientAbortException is thrown. - Customers, however, reported that whenever such a situation happened, the files downloaded were either 0k sized or corrupted. And I'm whole-heartedly clueless by now :( Is there anything I forgot to double-check? Using the latest JDK, no tcnative, running Ubuntu Linux 6.06.1. Applied pretty much every solution attempt I could come up with using google, including tweaking the HTTP connector setup in server.xml, removing tcnative, using mod_proxy instead of mod_jk - no success. Does anyone around here have any more ideas on how to get hold of this? Thanks loads in advance and bye, Kristian -- Kristian Rink * http://zimmer428.net * http://flickr.com/photos/z428/ jab: [EMAIL PROTECTED] * icq: 48874445 * fon: ++49 176 2447 2771 One dreaming alone, it will be only a dream; many dreaming together is the beginning of a new reality. (Hundertwasser) - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbortException / Broken Pipe?!
When I used the phrase I'd bet a box of donuts, what I should have written was ...and if I'm wrong, it won't be the first time :) Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Tue, August 14, 2007 1:08 pm, Rainer Jung wrote: Do I get the box, if I can write a servlet and describe a procedure by which a Firefox user can produce the exception when calling my servlet? Frank W. Zammetti wrote: Have you noticed if this affects IE users and Firefox users equally? I ask because there's a known issue (that I've never seen an actual answer to) where IE causes these exceptions frequently with no ill effect to anything (other than the overhead of handling the exception in the VM on the server). I'd bet a box of donuts that it only happens for IE users. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Hot to access raw POST Data in servlet?
Have a look here:
http://javawebparts.sourceforge.net
...more specifically this:
http://javawebparts.sourceforge.net/javadocs/javawebparts/request/RequestHelpers.html
...the getBodyContent() is, I think, what your looking for.
hth,
Frank
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!
On Tue, July 17, 2007 2:55 pm, Johnny Kewl wrote:
- Original Message -
From: Joe Kramer [EMAIL PROTECTED]
To: Tomcat Users List users@tomcat.apache.org
Sent: Tuesday, July 17, 2007 2:51 PM
Subject: Hot to access raw POST Data in servlet?
Hello,
I can't find a way to do a simple thing - access raw postdata in
servlet service()/doPost() method. (The data that goes after the
headers.)
In old Servlet API it was possible using
javax.servlet.http.HttpUtils.parsePostData() which is now deprecated.
Servlet API only seem to have methods to access request parameters and
properties in HttpServletRequest, but not the request data itself.
What is the best/pssible practice to do that?
Joe, I'm far too young to remember this function, so just slap me around
if
I dont get it ;)
If all that function gave you was a HashTable of parameters then wont
getParameterNames be good enough?
Ie you can enumerate through them find the parameters and the values...
like
this
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()){
paramName = (String)paramNames.nextElement();
paramValue = request.getParameter(paramName);
}
or you could use getParameterMap if you looking for something close to
the old HashTable.
getInputStream... will give you the raw stream.
Young guys like me, use the Enumeration... its handy when you have more
than
one submit button ;)
Thanks.
-
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For additional commands, e-mail: [EMAIL PROTECTED]
-
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For additional commands, e-mail: [EMAIL PROTECTED]
-
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Re: Session IDs XMLHttpRequests
I can say with 100% certainty that a servlet invoked with XMLHttpRequest **DOES** have the same access to server-side objects as a non-AJAX request. I say this based on two applications in production that do this all day long, one Struts-based, one not. I also say it based on a number of other applications, some using other frameworks, some using plain servlets, all that do this as well, with no problems. Now, the two production apps, which are very much AJAX-based, not just using it here and there, are running on Websphere, so that leaves the possibility that there's something going on with Tomcat. However, I generally develop under Tomcat, including most of those other apps I mentioned, and never observed this problem. This isn't to say what your seeing isn't truly an issue, I have no doubt it is... but, the only difference I can conceive of, based on all this experience, between an AJAX request and a normal POST/GET, is the session cookie not being passed in with the AJAX request. I could believe that might happen, and I could also believe it may be different from browser to browser (don't misunderstand, I have no knowledge of this being the case, but it wouldn't shock me). As another poster suggested, I would begin by monitoring the requests going across in Firefox with Firebug, and perhaps TamperData... you should be able to see every detail of the request and response with those... compare an AJAX request with a plain form sumission or link click and see if you notice any difference... I'd bet dollars to donuts you'll find some header missing, or something along those lines. But, unless there's some peculiarity to your server setup or environment, I can tell you for sure there's no fundamental difference to the server between the two types of requests, and by extension, to the servlets/filters that execute to service the request. Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Mon, May 21, 2007 2:33 pm, Williams, Allen wrote: I had posted this question to four different Java fora over four days and gotten zero replies, when it occurred to me how stupid not to ask the community that wrote Tomcat. I was just going to post this, which is a summary that describes what I've found so far: -- QUOTE -- In the interest of informing the community, I'm publishing the results of four days of testing and debugging of XMLHttpRequests and attributes. This has led me to the conclusion that servlets invoked with an XMLHttpRequest do not have the same access to server-side objects (actually, attributes) as those invoked via the normal URL mechanism. I don't know why, because if I insert a filter, the filter gets executed, albeit the first time with the wrong session ID. I began this odyssey when a filter in place to check if a user's session had timed out would fail the first time when invoked with an XMLHttpRequest, but would work each time thereafter. What I discovered there was that there were two JSESSIONID cookies stored and being sent in the browser and the jsp and other servlets were requesting the correct one. The xml request was not, it was requesting the (old? I don't know) invalid JSESSIONID. One would think, OK, I'll just read the cookies in my servlet, check each ID with request.isRequestedSessionIdValid(), and force the right one. Wrong. All of the http session APIs that allow one to manipulate the session ID and force a good one are deprecated, according to Sun's web site, so the programmer isn't allowed to find use a good session ID. In order to progress while I waited vainly for a reply, I just removed the filter from the servlet's path so it didn't invoke it. I want the filter to check, but decided to move on in the meantime. That's when I discovered that, evidently, the servlet does not get a valid session ID either. I had the following line in my XMLHttpRequest servlet: [code] HttpSession sess= req.getSession(); [/code] This seemed to execute and work fine, until I needed to access session-scoped attributes I had defined in other pages or servlets. The were repeatedly null. When I changed the above line to this: [code] HttpSession sess= req.getSession(false); [/code] the reason was apparent: the servlet was generating a brand new session for me. So, for some reason, XMLHttpRequests don't get the same treatment that normal servlets get. I'm going to have to go and modify a lot of code to pass stuff around as query parameters in URLs, which I really don't want to do for both aesthetic security reasons, but see no alternative. Hopefully, there really
Re: PLZ Help with java.net.SocketException: Connection reset
This generally means that the client aborted the connection before the server completed its response. Most of the time that means a user clicking Stop as a page loads, but I have seen it other times due to resource loading issues. For example, Dojo, at least through 0.3.1, was notorious for causing these because of its dependency loading mechanism, and I never did figure out why. I've seen it at other times with other libraries, and my own client-side code, as well. In any case, they are generally not something you need to be overly concerned with. Certainly it's true that they consume resources, if for no other reason than the JVM needing to deal with the exception, but it's rare that you can do anything to stop these, and if anyone knows differently I for one would be extremely interested to hear about it :) I've never heard of it being a performance issue or anything like that (except I guess filling up a log file if its happening *that* much). Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) and JavaScript, DOM Scripting and Ajax Projects (2007, Apress, ISBN 1-59059-816-4) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Mon, April 30, 2007 11:46 am, Lorenzo Jiménez wrote: Hello. I have this error over and over again, but I have no clue about its meaning or where to start? Can anyone help me? After the error is my web.xml. I am using Tomcat 5.5.16. Thanks very much, Regards, Lorenzo ERROR - 2007-04-30 00:16:26,395 [http-198.64.153.30-80-Processor34] WARN org.apache.catalina.core.ContainerBase.[Catalina].[registro.nacion.com] - Exception Processing ErrorPage[errorCode=404, location=/paginanoexiste.jsp] ClientAbortException: java.net.SocketException: Connection reset at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:366) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433) at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:311) at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293) at org.apache.catalina.connector.Response.flushBuffer(Response.java:537) at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:286) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: java.net.SocketException: Connection reset at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:746) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:348) at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:769) at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:125) at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:579) at org.apache.coyote.Response.doWrite(Response.java:559) at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:361) ... 16 more WEB.XML --- ?xml version=1.0 encoding=UTF-8? web-app version=2.4 xmlns=http://java.sun.com/xml/ns/j2ee; xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; xsi:schemaLocation=http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd; !-- ** -- !-- Standard Action Servlet Configuration (with debugging) -- servlet servlet-nameaction/servlet-name servlet-classorg.apache.struts.action.ActionServlet
Re: Java Web Parts v1.1 Beta 1 released
Hi Anoop, http://javawebparts.sourceforge.net Click the Javadocs link, that's the easiest way to see what's available. The project is organized as 11 packages, such as javawebparts.filter and javawebparts.servlet for example, it's usually pretty obvious where things will be found (and the descriptions on the javadoc summary will usually point you in the right direction). hth, Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Fri, April 13, 2007 10:51 am, Anoop kumar V wrote: hey - Where would I find pertinent information about the project. I mean suppose I want to look up what all types of filters are available for reuse, where is that infromations. Thanks, Anoop On 4/8/07, Frank W. Zammetti [EMAIL PROTECTED] wrote: Hey everyone... just a quick weekend note to those that might be interested that Java Web Parts v1.1 beta 1 has been released. This release includes a number of new features as well as a number of bug fixes and enhancements to existing functionality (see release notes for full list). You can download the release, browse documentation, sample apps, etc., at javawebparts.sourceforge.net Thanks and take care, Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Java Web Parts v1.1 Beta 1 released
Woops, sorry about that folks... I didn't see the Cc list before I clicked Reply All. Didn't mean to cross-reply. Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Fri, April 13, 2007 11:08 am, Frank W. Zammetti wrote: Hi Anoop, http://javawebparts.sourceforge.net Click the Javadocs link, that's the easiest way to see what's available. The project is organized as 11 packages, such as javawebparts.filter and javawebparts.servlet for example, it's usually pretty obvious where things will be found (and the descriptions on the javadoc summary will usually point you in the right direction). hth, Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Fri, April 13, 2007 10:51 am, Anoop kumar V wrote: hey - Where would I find pertinent information about the project. I mean suppose I want to look up what all types of filters are available for reuse, where is that infromations. Thanks, Anoop On 4/8/07, Frank W. Zammetti [EMAIL PROTECTED] wrote: Hey everyone... just a quick weekend note to those that might be interested that Java Web Parts v1.1 beta 1 has been released. This release includes a number of new features as well as a number of bug fixes and enhancements to existing functionality (see release notes for full list). You can download the release, browse documentation, sample apps, etc., at javawebparts.sourceforge.net Thanks and take care, Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ClientAbort error
FYI, this isn't *always* caused by a user event... in fact, I have an application now that exhibits this behavior, under Internet Explorer only, during LOADING of the application. I've always observed the don't worry about it philosophy too, and with this particular app it doesn't seem to have any ill effect, but I can say with 100% certainty it has nothing to do with user actions in this case (it seems to have to do with Dojo and how it loads resources, but I haven't had time to try and hunt it down). I've seen it elsewhere too... seems to largely be limited to IE, if not exclusive to it, and true, I've never seen it cause a problem. Frank Mark Thomas wrote: Propes, Barry L wrote: anybody know what this error would mean? I'm using TC 4.1.3 by the way. 2007-04-10 16:09:19 StandardWrapperValve[default]: Servlet.service() for servlet default threw exception ClientAbortException: java.net.SocketException: Software caused connection abort: socket write error I noticed this on my logs a few times and hadn't really seen it before. Didn't know why it was occurring. The user clicked stop in their browser or closed their browser before Tomcat was finished sending the page to them. Nothing to worry about. Mark - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Java Web Parts v1.1 Beta 1 released
Hey everyone... just a quick weekend note to those that might be interested that Java Web Parts v1.1 beta 1 has been released. This release includes a number of new features as well as a number of bug fixes and enhancements to existing functionality (see release notes for full list). You can download the release, browse documentation, sample apps, etc., at javawebparts.sourceforge.net Thanks and take care, Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Filter class not found problem
On Wed, April 4, 2007 11:21 am, Hassan Schroeder wrote: FWIW, I just installed 6.0.10 and dumped in a webapp of mine that uses a Filter as a front controller, and it works fine. I have both JAVA_HOME and JRE_HOME defined for convenience (so I can switch as I test/upgrade versions); right now it's Java 1.6.0-b105 as echo $JAVA_HOME /usr/local/jdk1.6.0 echo $JRE_HOME /usr/local/jdk1.6.0/jre So I'd say it's not a problem intrinsic to /all/ Filters... Fair to say... I noticed your not under Windows, which is potentially a big difference... but in any case, if it was a problem with my filter itself, I wouldn't expect it to be working in 6.0.9 with the same environment otherwise... also note I didn't recompile it when moving between 6.0.9 and 6.0.10, so nothing weird going on there. I just don't get it. Ah well, I've burned enough cycles on it... I can happily continue my real work under 6.0.9, no problem, but if anyone has any other ideas I'm certainly interested in hearing them... like I said, I don't know if this is a Tomcat bug or not, but I certainly can't explain it :) Frank -- Hassan Schroeder [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Filter class not found problem
I actually do have the JDK installed, my bad for not stating that clearly... I was just stating the JRE version that would be used by Tomcat, since the JRE of course comes with the JDK, but I wasn't clear... you do raise an intersting point though, I wonder if I have to specify JRE_HOME anyway? I can tell you that when I start Tomcat, it reports the JRE directory as c:\java15, exactly as I expect, so I kind of doubt that's it. FYI, I am in fact using the directory structure Tomcat had by default, which is CATALINA_HOME/lib, and servlet-api.jar is in there... I just tried creating CATALINA_HOME/common/lib because all the documentation I found online talks about that directory, and while I figured it was just documentation not having been updated for the latest version, I figured it was worth a try. Bottom line: I have it set up as you say, except for the JRE_HOME env var, which I tend to doubt will do it (will try when I get home tonight anyway), but I'm still stuck with the same problem. As another fact mixed in: I tried a simple test: I dropped to a command prompt and just tried to compile a simple filter on its own... it failed because none of the servlet API classes were in the classpath. This is good because it proves I don't have a servlet.jar floating around in the system classpath (I was still hoping the FAQ entry about a stray servlet-api.jar floating around might be right, but that would seem to indicate pretty strongly it isn't). Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Tue, April 3, 2007 3:11 am, Rashmi Rubdi wrote: On 4/2/07, Frank W. Zammetti [EMAIL PROTECTED] wrote: Hey folks... I'm having a real pain of a problem here... vital stats: JRE 1.6.0-b105 (JDK 6) Tomcat 6.0.10 Since you have installed the JRE and not the JDK, I suppose you must set the JRE_HOME environment variable, and remove the JAVA_HOME environment variable. On my installation of Tomcat 6.0.10 there is no CATALINA_HOME/common/lib , but there's only a CATALINA_HOME/lib folder which contains servlet-api.jar by default. So I recommend using the default folder structure that came with Tomcat 6.0.10 fresh install. It should be fine if you have servlet-api.jar which contains the javax.servlet.Filter class under k:\tomcat6010\lib\ For completeness, environment variables I have: CATALINA_HOME=k:\tomcat6010 JAVA_HOME=c:\java15 Path=c:\java15\bin;k:\tomcat6010\bin;x:\classes\apache-ant-1.7.0\bin ...NO classpath defined... I don't think there's any other relevant env vars. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Filter class not found problem (looks like a possible Tomcat bug)
I've managed to narrow this problem down quite a bit, and long and short of it is that the problem is specific to 6.0.10. I tried a number of versions in the 6.x branch including 6.0.0, 6.0.4, 6.0.8 and 6.0.9, and in all of them my webapp starts up just fine, no complaints about the Filter class, things work as expected. In 6.0.10 however, I get the complaint about the Filter class not found. I even went and re-downloaded the 6.0.10 bundle (just the plain zip version, not the installer) and the problem was present immediately after unzipping and copying my webapp over. Now, this of course may not be a bug... maybe there's simply something about 6.0.10 I don't know that I need to do, in fact I'm hoping and even expecting that to be the case, but it's certainly a possible bug too... can anyone think of anything that would tell us one way or another? Thanks! Frank Rashmi Rubdi wrote: On 4/2/07, Frank W. Zammetti [EMAIL PROTECTED] wrote: Hey folks... I'm having a real pain of a problem here... vital stats: JRE 1.6.0-b105 (JDK 6) Tomcat 6.0.10 Since you have installed the JRE and not the JDK, I suppose you must set the JRE_HOME environment variable, and remove the JAVA_HOME environment variable. On my installation of Tomcat 6.0.10 there is no CATALINA_HOME/common/lib , but there's only a CATALINA_HOME/lib folder which contains servlet-api.jar by default. So I recommend using the default folder structure that came with Tomcat 6.0.10 fresh install. It should be fine if you have servlet-api.jar which contains the javax.servlet.Filter class under k:\tomcat6010\lib\ For completeness, environment variables I have: CATALINA_HOME=k:\tomcat6010 JAVA_HOME=c:\java15 Path=c:\java15\bin;k:\tomcat6010\bin;x:\classes\apache-ant-1.7.0\bin ...NO classpath defined... I don't think there's any other relevant env vars. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Filter class not found problem
Yes I agree, that's what I thought the problem was too, I was just working through eliminating any problems on my part (which is probably still the cause, but seemingly in a less than obvious way now)... I confirmed the Filter class is in servlet-api.jar, and it's in javax/servlet... I also moved that JAR to CATALINA_HOME/common/lib and noted that now Tomcat won't even start, so clearly it's using that JAR when it's in CATALINA_HOME/lib where it was originally. I'm at a loss on this one... any other ideas out there? This is my first time using the newer JDK and the newer Tomcat... is there anything more one has to do nowadays besides put an exploded webapp in CATALINA_HOME/webapps? Could this be some funky classloader issue somehow? Thanks! Frank Pulkit Singhal wrote: Hello Frank, It seems to me that the error is not so much about the Filter you want to load but the fact that it can't find the javax/servlet/Filter class which is (I think) supposed to be part of the servlet-api.jar ... I know you said that its bundled but try moving that jar around. Or at least crack open that jar in winzip or list the files using the jar command to make sure it really does have the javax.servlet.Filter class. On 4/1/07, Frank W. Zammetti [EMAIL PROTECTED] wrote: Hey folks... I'm having a real pain of a problem here... vital stats: JRE 1.6.0-b105 (JDK 6) Tomcat 6.0.10 I have a filter that compiles fine but will not initialize... error that appears on Tomcat startup: Apr 2, 2007 1:04:38 AM org.apache.catalina.core.StandardContextfilterStart SEVERE: Exception starting filter MasterControlFilter java.lang.NoClassDefFoundError: javax/servlet/Filter at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass( SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) ...and so on... The filter is contained within a JAR in my webapp's WEB-INF/lib directory. I've verified the filter is in the correct package, and that web.xml specifies the correct class name. I've spent about an hour Googling, and I've found numerous references to seemingly similar problems, but no answers... I've verified that there is no other servlet-api.jar floating around... I did notice a number of places that said servlet-api.jar should be in CATALINA_HOME/common/lib, but it's in CATALINA_HOME/lib in my installation (that's how it came out of the distro)... I assume that's just some old documentation I'm finding, but maybe not? For completeness, environment variables I have: CATALINA_HOME=k:\tomcat6010 JAVA_HOME=c:\java15 Path=c:\java15\bin;k:\tomcat6010\bin;x:\classes\apache-ant-1.7.0\bin ...NO classpath defined... I don't think there's any other relevant env vars. Can anyone point me in the right direction? I'm pretty well stuck at the moment until I get this resolved. Thanks! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Filter class not found problem
Hey folks... I'm having a real pain of a problem here... vital stats: JRE 1.6.0-b105 (JDK 6) Tomcat 6.0.10 I have a filter that compiles fine but will not initialize... error that appears on Tomcat startup: Apr 2, 2007 1:04:38 AM org.apache.catalina.core.StandardContext filterStart SEVERE: Exception starting filter MasterControlFilter java.lang.NoClassDefFoundError: javax/servlet/Filter at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) ...and so on... The filter is contained within a JAR in my webapp's WEB-INF/lib directory. I've verified the filter is in the correct package, and that web.xml specifies the correct class name. I've spent about an hour Googling, and I've found numerous references to seemingly similar problems, but no answers... I've verified that there is no other servlet-api.jar floating around... I did notice a number of places that said servlet-api.jar should be in CATALINA_HOME/common/lib, but it's in CATALINA_HOME/lib in my installation (that's how it came out of the distro)... I assume that's just some old documentation I'm finding, but maybe not? For completeness, environment variables I have: CATALINA_HOME=k:\tomcat6010 JAVA_HOME=c:\java15 Path=c:\java15\bin;k:\tomcat6010\bin;x:\classes\apache-ant-1.7.0\bin ...NO classpath defined... I don't think there's any other relevant env vars. Can anyone point me in the right direction? I'm pretty well stuck at the moment until I get this resolved. Thanks! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat5.5/Ajax problem, XmlHttpRequest.status = 0 (statusText = Unknown)
Shouldn't be any issues, do it all the time with 5.5... have you used something like HTTPWatch or even good ole' Firebug to see the request going through and the actual response? Chances are that would be rather revealing. Frank Mike Broadbear wrote: Hi, I'm getting an error when I make Ajax calls with my web app on Tomcat 5.5 (XmlHttpRequest.status = 0 (statusText = Unknown)). It was working, now it does not. I have tried to copy other working code into the web app, but I get the same errors. I was just wondering if there we re any known issues with Ajax and Tomcat 5.5? Thanks _ Explore the seven wonders of the world http://search.msn.com/results.aspx?q=7+wonders+worldmkt=en-USform=QBRE -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Standards Complaint Browser Campaign
Christopher Schultz wrote:
If you stay away from the innerHTML attribute (which only works in
MSIE, so you're probably not using it) and instead use the methods
Document.createElement and node.add and node.insert, then you'll be fine.
This is false. innerHTML is supported by most current browsers. Try
this, just click the button:
htmlheadtitle/title/headbody
div id=divTest/div
input type=button
onClick=document.getElementById('divTest').innerHTML='It works';
/body/html
Works in IE, FF and Opera at least, I don't have a Mac to try in Safari
but I'd bet it works just fine. I can't testify as to what the minimum
version of each browser that supports it is... I don't think it's
exactly new for FF or Opera though, I suspect you'd find the above works
in FF 1.0 though, and Opera back probably a few versions too.
You would be correct to say innerHTML is not a standard (other than de
facto perhaps), but to say it doesn't work in anything but IE is just
not correct.
Users of browsers like NN 4, MSIE 4, and some others might be left out
in the cold. My advice on that is to make sure that you are only using
javascript as added flavor, and to ensure that a non-javascript user can
still accomplish everything (even if it is a bit less convenient).
That's true about older browsers being left out in the cold, but at some
point I think it's perfectly legitimate to stop supporting older
versions. I don't think it's an egregiously bad move to not support 4.x
browsers at this point. I think it's telling that a Google search for
browser statistics, and then checking out the results on the first
page, most of the statistics lists don't even mention anything older
than 5.x browsers, and those that do show sub-1% usage levels. So, I
for one am not losing any sleep by not supporting anything older than
5.x browsers :)
- -chris
Frank
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!
-
To start a new topic, e-mail: users@tomcat.apache.org
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Re: Standards Complaint Browser Campaign
Christopher Schultz wrote: No question. All my apps from the last few years use reasonably recent standards such as CSS and XHTML. Most old browsers render XHTML just fine, and sadly CSS isn't perfect across compliant browsers even today. But if you're using NN 4, it's just time to upgrade, dude ;) My dad started using a computer I'd say maybe 5 years ago... still doesn't do much except surf the web and manipulate photos (he's actually gotten really good at that) He has this annoying habit of only running Windows 95 and Netscape *3*! I just can't convince the man to switch to anything else! Trying to get to anything on his computer is as frustrating as can be: 500 error popups, partially rendered pages at best, etc. (oh yeah, and after he installs Windows, he has a mental checklist of all sort of things to remove... he's always bragging yep, I got Windows down to 2Mb, or whatever size it is, I don't really remember, but a very small install is the point) Frank - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFoRf39CaO5/Lv0PARAoeKAJ4hixOpkRiVRcdd8trbPHoxCaYQmACgrf5c JPBCunbZAnOr5vdUxl0Dpbo= =mHn6 -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [ANN] Java Web Parts 1.0 (GA) is now available
Hi Martin, We should move to the JWP mailing list for this, and I sent this reply to there as well... we wouldn't want to be using any Apache lists for something we shouldn't be (I've been told announcements of JWP releases are fine, but discussions, unless related to Struts or Tomcat in particular, probably aren't). I hope you'll join us on that list if you aren't already signed up, these are points worth dicussing :) Frank On Tue, January 2, 2007 11:34 am, Martin Gainty wrote: Good Morning Frank 3 items for suggestion box suggest ant javawebparts/WEB-INF/src/build.xml doesnt seem to include dependencies e.g target name=make_jars depends=compile suggest placing target to build war file target suggest bin distro to have some samples.war already packaged much like struts Also what are the implications for including legacy 1.2 ajax tags (is there a userguide available) is there a reconfiguration necessary? Good Stuff!!! Martin-- __ Disclaimer and confidentiality note Everything in this e-mail and any attachments relates to the official business of Sender. This transmission is of a confidential nature and Sender does not endorse distribution to any party other than intended recipient. Sender does not necessarily endorse content contained within this transmission. The Java Web Parts (JWP) team is proud to announce that new year's day sees our first GA release, 1.0, unleashed upon the world! For those of you new to JWP, it is a project that provides small, reusable and largely independant Java components of interest to all web application developers. You can think of this project as being somewhat similar to the Jakarta Commons projects conceptually. JWP is comprised of a number of packages, each supplied in its own individual JAR, with little (ideally no) cross-dependency. The packages currently include: * AjaxParts - A collection of components for doing AJAX, including the very popular AjaxParts Taglib (APT Taglib) * Context - A collection of components for dealing with a servlet context including functionality to calculate the size of the context object * Filter - A collection of useful servlet filters including a Javascript compressor, a request recorder, a cross-site scripting filter, a compression filter and an IP access control filter * Listener - Context and Session listeners for various occassions including functionality to limit the number of concurrent sessions * Misc - Things that didn't fit anywhere else, including a very powerful CoR implementation and a utility to play back recorded sessions created with the session recorder filter (useful for automated load testing) * Taglib - Various tag libraries including some UI widgets, string utilities and a taglib to insert various useful Javascript functions * Servlet - A collection of servlets to fulfill common needs including one that can render a graphical representation of a string of text using various font styles * Request - Classes and functions for dealing with an HTTP request including functions to get various information about a request easily * Response - Classes and functions for dealing with an HTTP response including functionality to encode HTML entities in the response * Session - Classes and functions... eh, you see the pattern! (includes the ability to calculate the size of session, etc) Please visit http://javawebparts.sourceforge.net for further info, docs, downloads, all that jazz. We now return you to your regularly scheduled mailing list posts and wish every a happy new year! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ The MSN Entertainment Guide to Golden Globes is here. Get all the scoop. http://tv.msn.com/tv/globes2007/ - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[ANN] Java Web Parts 1.0 (GA) is now available
The Java Web Parts (JWP) team is proud to announce that new year's day sees our first GA release, 1.0, unleashed upon the world! For those of you new to JWP, it is a project that provides small, reusable and largely independant Java components of interest to all web application developers. You can think of this project as being somewhat similar to the Jakarta Commons projects conceptually. JWP is comprised of a number of packages, each supplied in its own individual JAR, with little (ideally no) cross-dependency. The packages currently include: * AjaxParts - A collection of components for doing AJAX, including the very popular AjaxParts Taglib (APT Taglib) * Context - A collection of components for dealing with a servlet context including functionality to calculate the size of the context object * Filter - A collection of useful servlet filters including a Javascript compressor, a request recorder, a cross-site scripting filter, a compression filter and an IP access control filter * Listener - Context and Session listeners for various occassions including functionality to limit the number of concurrent sessions * Misc - Things that didn't fit anywhere else, including a very powerful CoR implementation and a utility to play back recorded sessions created with the session recorder filter (useful for automated load testing) * Taglib - Various tag libraries including some UI widgets, string utilities and a taglib to insert various useful Javascript functions * Servlet - A collection of servlets to fulfill common needs including one that can render a graphical representation of a string of text using various font styles * Request - Classes and functions for dealing with an HTTP request including functions to get various information about a request easily * Response - Classes and functions for dealing with an HTTP response including functionality to encode HTML entities in the response * Session - Classes and functions... eh, you see the pattern! (includes the ability to calculate the size of session, etc) Please visit http://javawebparts.sourceforge.net for further info, docs, downloads, all that jazz. We now return you to your regularly scheduled mailing list posts and wish every a happy new year! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Servlet in a .jar file? AJAX access?
Yes, certainly you can put a servlet in a JAR... after all, Struts is based on a servlet, and you generally just drop the Struts JAR into your webapp... accessing a servlet via AJAX is, in simplest terms, just a plain old HTTP request like any non-AJAX request, so yes, you can do that too. If your servlet is in a JAR, and that JAR is in the classpath, then all you need to do is put the appropriate entries in web.xml and your off to the races... if you want to call it via AJAX, that works just fine too, if you just pass simple name/value pair parameters. Does that answer your question, or did I misunderstand? Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! Jon Yeargers wrote: Is it possible to put a servlet in a .jar file and be able to access it via AJAX? I have some support servlets that I want to share via a common library. To this point Ive only been putting session beans in there. Its easy to point to those using 'jsp:usebean' tags and entries in 'web.xml'. Can I do something similar to a servlet such that I can get to it via an XMLHttpRequest object? Jon - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Need Help w. Servlets And The JDBC.
Google is your friend... here's a quick hit: http://publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp?topic=/com.ibm.db2.udb.doc/ad/cjvjdbas.htm ...and another (although slightly older, still looks to be valid)... http://www.cs.bham.ac.uk/~aps/syllabi/2004_2005/issws/h01/jdbc.html ...and yet another... http://java.sun.com/docs/books/tutorial/jdbc/basics/index.html This last one might be the best, but all three should do the trick. There is no fundamental difference between using JDBC from a servlet vs. a straight Java app. Frank Steve R Burrus wrote: Hi all. I am an admitted newbie when it comes to using a database connection for a servlet to access. So can someone please tell me the basics about how exactly I should go about doing this?? I have been very much stumped about how I should do this for quite a long time now! I just know that I should use 1 of 3 getConnection( ) methods to start to do this and create a Connection object but little else. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to forward user to a page after container manager authntication ?
Container-managed authentication works by intercepting a request for a protected (constrained) resource and redirecting to the page with the logon form. Once the user authenticated, the request for the constrained resource continues, in effect, the user is forwarded to what they requested in the first place. Therefore, to do what you want, the request that results in the logon page being shown should be for login_done (JSP? .do?) Make that the default document in web.xml if that's what you need. Frank legolas wrote: Hi Thank you for reading my post how i can forward user to an specefic page after he/she successfully authenticated using form based authentication? if user fail to provide a wrong user/pass then he/she will be forwarded to login_error page , what if i need user to be forwarded to login_done after he/she logged in suggessfully ? thanks. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: decompiling classes
Umm, the command to decompile Tomcat's classes is this: http://tomcat.apache.org/svn.html ;) Frank Nicholas Irving wrote: I know the software you mean, it is completely free, but I have a guide that I can sell to you for $19.95 that tells you where to download it from and contains commonly available documentation convert into a PDF for you to read. So you want my PayPal account so that you can deposit the money and then enjoy the world of decompiling java classes. NIrving On 08/09/06, Propes, Barry L [EMAIL PROTECTED] wrote: what's the command again for decompiling Tomcat's classes? Or was there special software needed to do so? -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM/Yahoo: fzammetti MSN: [EMAIL PROTECTED] Author of Practical Ajax Projects With Java Technology (2006, Apress, ISBN 1-59059-695-1) Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[ANNOUNCE] New article: The AjaxParts Taglib from Java Web Parts: AJAX for Java Developers the Easy (yet powerful) Way!
Hi everyone, I've gotten a number of requests for an article on AjaxParts Taglib, and I finally got around to writing it :) You can check it out here: http://www.omnytex.com/articles If you have never heard of AjaxParts Taglib before, in brief, AjaxParts Taglib, a component of the Java Web Parts Project (http://javawebparts.sourceforge.net), is a taglib that allows for easy, declarative, event-driven AJAX, allowing a developer to add AJAX capabilities to existing or new webapps without the need to write ANY JavaScript at all! This article demonstrates how it works, explains the benefits, and goes into some details about the capabilities it offers out-of-the-box, as well as the ways in which it can be extended to fulfill far more advanced users. Hope it is helpful, and take care! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [ANNOUNCE] New article: The AjaxParts Taglib from Java Web Parts: AJAX for Java Developers the Easy (yet powerful) Way!
Thanks Michael, I appreciate you taking the time to look!
Excellent question... the answer is that the code that APT writes into
the onClick handler for the button will append itself onto whatever is
there already, it WILL NOT overwrite your existing code. This wasn't
always true, but is as of a couple of versions ago :)
FYI, if you were going where I think you might have been going... you
can't use this to abort the request. For instance, you might expect that...
if (!shouldAJAXRequestFire())) { return; }
...would stop the request form firing, since the APT code would follow
this. But, it doesn't work. I'm actually a little surprised by that, I
had to go try it to be sure... I guess the JS interpreter doesn't treat
what's in onClick like a function, it's instead just a collection of
statements that it interprets, return not aborting that interpretation.
However, it is already on our to-do list to provide this ability... we
already have the preProc that gets called before the request, we'll
probably examine the return from that and if false, abort the request.
We also were thinking of adding an if child element under the event
element where you could put a Javascript snippet, and if it returns
false, that aborts the request. Not sure which way we'll go yet (maybe
both)... there is a feature request on the SF site, if anyone has an
opinion, I'd love to have it recorded :)
Frank
Michael Jouravlev wrote:
On 7/26/06, Frank W. Zammetti [EMAIL PROTECTED] wrote:
Hi everyone,
I've gotten a number of requests for an article on AjaxParts Taglib, and
I finally got around to writing it :) You can check it out here:
http://www.omnytex.com/articles
If you have never heard of AjaxParts Taglib before, in brief, AjaxParts
Taglib, a component of the Java Web Parts Project
(http://javawebparts.sourceforge.net), is a taglib that allows for easy,
declarative, event-driven AJAX, allowing a developer to add AJAX
capabilities to existing or new webapps without the need to write ANY
JavaScript at all! This article demonstrates how it works, explains the
benefits, and goes into some details about the capabilities it offers
out-of-the-box, as well as the ways in which it can be extended to
fulfill far more advanced users.
Hope it is helpful, and take care!
Frank
Frank,
great stuff! I haven't read the whole article yet :-) so just a quick
question:
say I have this button:
input type=button value=Click me for AJAXajax:event
ajaxRef=MyFunctions/Button1 /
and I defined the onclick event in ajaxConfig.
What will happen if I define another onclick handler right in the
input element like
input type=button value=Click me for AJAX onclick=return
doMyCustomStuff();ajax:event ajaxRef=MyFunctions/Button1 /
Basically, how do you handle custom Javascript?
-
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--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM: fzammetti
Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Java Web Parts -
http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!
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[ANN] Java Web Parts Beta 5
After a few months off, the Java Web Parts (JWP) team is proud to announce the release of beta 5! The most notable change is that the taglib formerly known as AjaxTags is now known as the AjaxParts Taglib, or APT for short. Not only is the name different, but the taglib has been essentially rewritten and is now easier and yet more powerful than ever... If a declarative approach to AJAX that doesn't require you to know a bit of Javascript (unless you want to get into it) sounds good to you, now is a great time to check out what APT has to offer! There are other additions as well, and as always, JWP provides a number of useful parts, such as servlets, filters, taglibs, utility classes, and so forth. Things like getting the size of a session object, a powerful CoR implementation, filters to limit concurrent sessions, guard against XSS exploits and disallow app access during defined time windows, a class to make application configuration simple, a servlet to dynamically render a text of string as an image, a taglib that renders very handy Javascript functions, some GUI widgets... all of this can be found in JWP, and plenty more! If this sounds interesting to you, have a look: http://javawebparts.sourceforge.net And for you Maven folks, JWP can now be found in the iBiblio repo! (beta4 at this point only though) Thanks, and have a great day! Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: struts-config xml file throws a java exception
Olivier, can you post your struts-config.xml file here, or is it too large? You also may want to move this over to the Struts @user list, chances are its more appropriate there. Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Wed, June 7, 2006 12:06 pm, Olivier Bex wrote: Hi everyone, When I start Tomcat 5.0.28, it says that I have a parsing error in my struts-config.xml, but I think it's not. The log file throws a java.lang.NoSuchMethodException : bean has no property named loginRequired Regards, Olivier BEX - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: struts-config xml file throws a java exception
Olivier, what version of Struts are you using? Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! On Wed, June 7, 2006 12:34 pm, Olivier Bex wrote: Hi Frank, thanks for the advice. I have sent a mail to struts users. Here is my struts-config.xml : - struts-config - data-sources - data-source [...] /data-source /data-sources - form-beans [...] /form-beans - global-forwards forward name=login path=/login.jsp / /global-forwards - action-mappings - action path=/Login type=com.eyrolles.LoginAction validate=true input=/login.jsp name=loginForm scope=request forward name=success path=/EmployeListe.do / /action - action path=/EmployeListe type=com.eyrolles.EmployeListeAction scope=request set-property property=loginRequired value=true / forward name=success path=/employeliste.jsp / /action - action path=/Add type=com.eyrolles.AddEmployeAction name=employeForm scope=request input=/addemploye.jsp validate=true set-property property=loginRequired value=true / forward name=success path=/EmployeListe.do / forward name=error path=/addemploye.jsp / /action - action path=/Edit type=com.eyrolles.GetEmployeAction name=employeForm scope=request validate=false set-property property=loginRequired value=true / forward name=success path=/editemploye.jsp / forward name=error path=/EmployeListe.do / /action - [...] /action-mappings message-resources parameter=com.eyrolles.ApplicationResources / /struts-config -Message d'origine- De : Frank W. Zammetti [mailto:[EMAIL PROTECTED] Envoyé : mercredi 7 juin 2006 18:07 À : Tomcat Users List Cc : users@tomcat.apache.org Objet : Re: struts-config xml file throws a java exception Olivier, can you post your struts-config.xml file here, or is it too large? You also may want to move this over to the Struts @user list, chances are its more appropriate there. Frank -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Retrieve certain session data inside a servlet
I may be wrong about this, but I thought that it was expressly forbidden by the servlet spec to be able to get arbitrary sessions. That is, even if you store the session ID in some table, you wouldn't be able to get any session other than that associated with the current request. Now, that refers to standards-compliant ways to do it... I'm sure most app servers give you their own way to pull it off... JMX pops to mind as a likely possibility. (unless I'm wrong-LOL) Frank Eric Haszlakiewicz wrote: On Fri, Jun 02, 2006 at 11:15:03AM +0200, Carlos Alonso Vega wrote: Bob, Thanks for the reply. My problem is that the session info I need is not of the session that makes the request. I need to check other sessions in the same context. I can use the request because it is in the same context, so the manager is the same. This servlet is called internally from the app, and checks if some session exists. It is similar to the case of obtaining all active sessions from one context using the manager inside the servlet code (findSessions). If someone have this piece of code (or similar), it will serve me. To do something like that you need to do it yourself. i.e. store a HashTable in the application context, then add and remove sessions to it when people login and logout, or at some other convinient time. Of course, this assumes your app isn't running in a distributed environment. If it is, then it's impossible to get a session object from a different JVM. (well, you could serialize it and transfer the data, but it won't be the same object and it won't be useful for much other than extracting some info) eric - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: stylesheets giving 404 after a long response time
A 20 minute response time? Before I worried about why the stylesheet gets a 404, I'd solve that :) Trying to hold an HTTP connection open that long is a recipe for all sorts of problem (proxy timeouts, browser timeouts, etc). Is Tomcat serving the stylesheet, i.e., no web server in front of it? I'm wondering if session timeout isn't playing role somehow (not sure how it would, but with a request time that long, not very much would surprise me). Frank Vivek Mohan wrote: Hi People, I've an application running on tomcat 4.1. In one particular request, I could find that the server response takes a long time, say around 20 minutes, and when the page comes back all the stylesheets and header jsps are missing from the page. If I check my access logs, I see a 404 response for all the inclusions into the main jsp. Can anyone tell me how to solve this issue, or how to go about investigating it? -- Vivek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: stylesheets giving 404 after a long response time
I'm not sure, it's just one of those things that seems fishy to me... I would *logically* think it has nothing to do with it, or at least if it did, I definitely would not expect a 404... but I also know that logic frequently has nothing to do with solving problems like this :) If the timeouts are far longer than 20 minutes though (Infinite? Didn't know you could do that actually), then it wouldn't think that's the problem. Even still, 20 minutes for a request, I'd *still* be inclined to think that's the root cause of the problem somehow. Frank Vivek Mohan wrote: Yes, its Tomcat which is serving the resources. And I've made the timeouts to be infinity for my application so I don't think timeouts would be occurring. But in any case how does a timeout affect the fishing out of stylesheets? -- Vivek. On 5/10/06, Frank W. Zammetti [EMAIL PROTECTED] wrote: A 20 minute response time? Before I worried about why the stylesheet gets a 404, I'd solve that :) Trying to hold an HTTP connection open that long is a recipe for all sorts of problem (proxy timeouts, browser timeouts, etc). Is Tomcat serving the stylesheet, i.e., no web server in front of it? I'm wondering if session timeout isn't playing role somehow (not sure how it would, but with a request time that long, not very much would surprise me). Frank Vivek Mohan wrote: Hi People, I've an application running on tomcat 4.1. In one particular request, I could find that the server response takes a long time, say around 20 minutes, and when the page comes back all the stylesheets and header jsps are missing from the page. If I check my access logs, I see a 404 response for all the inclusions into the main jsp. Can anyone tell me how to solve this issue, or how to go about investigating it? -- Vivek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How i can exclude a url pattern for a filter ?
Take a peak at the code for some of the filters in Java Web Parts: http://javawebparts.sourceforge.net All of our filters implement a mechanism by which you can include or exclude paths, and you can also define multiple paths (a simple comma-separated list). The matching and configuration is externalized in a FilterHelpers class that you are of course welcome to use for your own filters. Of course, this will only help if you are talking about your own filters that you can modify. Frank Legolas Woodland wrote: Hi Thank you for reading my post I have defined a filter in my web.xml and for some of my pages it should be applied but not for all of them. for example i should exclude a subdirectory like : webroot/s/ from this filter but filter should be applied for other subdirectory and files . can some one tell me how i should configure it ? My current filter mapping : filter filter-nameChecker/filter-name filter-class com.leg.checker /filter-class /filter filter-mapping filter-nameChecker/filter-name url-pattern/*/url-pattern /filter-mapping - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: j_security_check is there a way to force users to renew password
Hi Ferindo, No, there is not. j_security_check implements simple container-managed authentication (sometimes called J2EE security), and that does not include password management of any sort. At work for instance, we have built a whole security framework on top of J2EE security to deal with just the kinds of things you are talking about. I'm afraid you'll have to do the same, or look around for a project that already has (I'm not aware of any off-hand). Frank Ferindo Middleton wrote: Is there a way to force users to renew their password or enforce password rules using the native j_security_check authentication mechanisms of tomcat? Ferindo -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: using digester from within a servlet
Christopher Piggott wrote: Frank W. Zammetti [mailto:[EMAIL PROTECTED] writes ... It looks to me like your ObjectCreate rule is incorrect... I believe the class you reference must be the fully-qualified name. That set me on the right track - thank you. My ObjectCreate rule was actually OK because I specified the Class itself, not the name of the class as a String: digester.addObjectCreate(config/xdb-config, XdbConfig.class); Ah cool, I wasn't aware of that version of it. Nice, I like that better. I guess we both learned something :) Thanks! Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: is there a possibility to define the startup order for webapps?
One could envision a rather complex and somewhat funky solution to this... I'm not so sure I'd recommend it, but in the interest of creative thinking... (1) Add a context parameter isAppRunning to the webapp, initially set to false. (2) Create a filter that is mapped to handle all requests. It checks the value of isAppRunning, and redirects to some page if the value is false. (3) Create a ContextListener that fires off a daemon thread. (4) The daemon thread makes a simple request to some predefined URL of the other webapp. If it does not get the response it expects, it sleeps for a second or two and then tries again. (5) When the daemon thread gets the reply it expects, it sets isAppRunning to true and dies. Now, add this all to the master webapp, that is, the one that depends on the other. All requests should be blocked and redirected to the page of your choice until the webapp it depends on returns that OK reply. I could envision this being done with a number of webapps, forming a dependency chain not unlike depends in Ant. Will it work? I think so, but I just made it up, so who knows :) Frank SOA Work wrote: argh. annoying. ok. thx anyway. -Ursprüngliche Nachricht- Von: Tomcat Users List users@tomcat.apache.org Gesendet: 24.04.06 17:57:49 An: Tomcat Users List users@tomcat.apache.org Betreff: Re: is there a possibility to define the startup order for webapps? A couple of other ideas: Use a small shared class (in shared/lib) to keep track of whether the database is running. The first webapp notifies this class when it's ready, and the second webapp checks if the database is ready before using it. Or, just accept that database errors will occur during startup. This is not a bad solution. From a user's point of view, when the server is down all requests will return some kind of error, until the server is back up and running. The only thing you can hope to gain is a better error message for a few seconds during startup. -- Len On 4/24/06, David Smith [EMAIL PROTECTED] wrote: This question comes up every so often and the answer is always no. The webapp load order cannot be relied upon. In your case, might I suggest the database webapp be run on a separate instance of tomcat? Can the connection be done via TCP/IP? --David SOA Work wrote: Hi there, I'm currenttly using tomcat 5.x for running my webapps. Now I have the following problem: I'm using an database system which runs as webapplication inside tomcat. Another webapplication needs the database connection for startup. Everytime I restart tomcat the server doesn't get up, because the second webapp ist started before the database webapp. Is there a way to define the startup order of the webapplications deployed on a server? With wich system does tomcat choose the apps while startup? Could it be a possibility to rename the folder of the webapps? thx Dominik ___ SMS schreiben mit WEB.DE FreeMail - einfach, schnell und kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- David Smith Network Operations Supervisor Department of Entomology Cornell University 2132 Comstock Hall Ithaca, NY 14853 Phone: (607) 255-9571 Fax: (607) 255-0940 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] ___ SMS schreiben mit WEB.DE FreeMail - einfach, schnell und kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: using digester from within a servlet
It looks to me like your ObjectCreate rule is incorrect... I believe the class you reference must be the fully-qualified name. For instance, look at this source as an example: http://cvs.sourceforge.net/viewcvs.py/javawebparts/javawebparts/WEB-INF/src/javawebparts/taglib/ajaxtags/AjaxInit.java?view=markup Here you see lines like: digester.addObjectCreate(ajaxConfig/handler, javawebparts.taglib.ajaxtags.config.AjaxHandler); Although I can't find anyplace in the documentation where it's explicitly stated (I'm betting I'm just missing it though), looking at the Digester Javadoc here: http://jakarta.apache.org/commons/digester/commons-digester-1.7/docs/api/ The example code also shows fully-qualified names. The same looks to be true of setNext by the way, and I suspect anywhere a class name is required. Give that a try and see if it solves your problem. I can tell you wish certainty that I've used Digester in a servlet under Tomcat and not had any problems. Frank Marc Farrow wrote: I have no knowledge of digesters, but if you are wanting Tomcat (the engine itself) to use a class, then it has to be in the common/lib folder and not deployed with the webapp. Not sure if this is the direction you want to go or not. hth On 4/23/06, Christopher Piggott [EMAIL PROTECTED] wrote: Hi, My goal is to use digester within a servlet, to parse a configuration file. When running within the servlet context digester is unable to find the classes specified by my rules. For example, I have this set of rules to process an element xdb-config which occurs within a config element: digester.addObjectCreate(config/xdb-config, XdbConfig.class); digester.addSetProperties(config/xdb-config, database-name, databaseName); digester.addSetNext(config/xdb-config, addXdbConfig, XdbConfig); What I get is this: Apr 23, 2006 10:21:29 PM org.apache.commons.digester.CallMethodRule setDigester SEVERE: (CallMethodRule) Cannot load class XdbConfig java.lang.ClassNotFoundException: XdbConfig I get this other places as well. One of the things I find odd is that this error occurs after the above one in the error log: Apr 23, 2006 10:21:29 PM org.apache.commons.digester.CallMethodRule setDigester SEVERE: (CallMethodRule) Cannot load class Config java.lang.ClassNotFoundException: Config Basically, the class loader seems to be able to load my classes from within my own classes, but NOT from the digester. What I don't understand is how that's possible when the required classes are clearly within the classpath; I upload them to tomcat as a .war and they are all exploded into WEB-INF/classes. I can't see how this could not be in the classpath and therefore not found by the digester. --Chris - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Marc Farrow -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Container-Managed Password Expiration/Strength enforcing?
Hi Renny, I'm relatively sure Tomcat does not offer anything like this. I know at work, we faced the same issues and developed a whole Security Framework to sit on top of J2EE security. We're actually a Websphere shop, but Websphere doesn't offer those capabilities either. That doesn't automatically mean Tomcat doesn't of course, but I'm fairly sure it doesn't. Frank [EMAIL PROTECTED] wrote: I am running Tomcat 5.5.12. I Use the sever's container-managed authentication mechanisms to require authentication for my web application users' credentials via forms. The users' ids and passwords are stored on an MySQL database. My question is, is there a way of configuring the server to require users to change their passwords every now and then enforce rules to require users to make their passwords strong? This doesn't seem to be documented in anywhere. I know that the source code is available but I don't know anything about the inside of Tomcat and wouldn't know where to begin for coding this myself. Renny - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: connection pool
I don't believe such a driver exists... I'd be interested myself if I'm wrong. I believe you'll have to use the jdbc:odbc bridge driver. Frank red phoenix wrote: Where can I get JDBC driver for Microsoft Access2000? Thanks On 3/30/06, Farrow, Marc [EMAIL PROTECTED] wrote: same as everything else. You will need a JDBC driver for Microsoft Access2000 and point your connection pooling in the server.xml to that driver. How you obtain the driver is another bear. -Original Message- From: red phoenix [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 29, 2006 10:43 PM To: users@tomcat.apache.org Subject: connection pool I know Tomcat5 supply some connection pool for oracle,sql and so on.Now I want to use Microsoft Access2000 Database,I don't know how to do it through tomcat connection pool. Any body can give me a example code for Microsoft Access2000 Database configure under Tomcat5 connection pool? Thanks in advance! Best regards, Edward - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Somewhat OT: Multiple auth methods in one webapp?
Hello... I marked this Somewhat OT because what I'm trying to accomplish would ultimately be running in Websphere. However, I would like to develop it under Tomcat as I've always done, and it's also a general webapp question... I have an existing webapp that uses form-based authentication. Now I'm being asked to expose some Web Services from it, and I'm thinking of using AXIS. However, one of our requirements is that HTTP be secured with basic auth. Ideally I would like to add AXIS to my existing webapp, but it doesn't seem possible to use both auth forms in a single webapp. In a perfect world I could continue to secure the user-accessible app with form-based auth, but secure just the path to the AXIS-based services via basic auth. I'm thinking the only way is to have a second webapp, but can anyone think of another solution? Thanks! -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Somewhat OT: Multiple auth methods in one webapp?
On Thu, March 16, 2006 12:48 pm, Jay Burgess said: I pursued a very similar exercise last week. I have a webapp using BASIC authentication and wanted to add in an RSS interface that used DIGEST authentication. Unfortunately, I never could figure out how to do this in a single webapp. I figured I'd chime in, though, as I think it'd be a nice feature if it's not already possible. Thanks Jay, I appreciate knowing at least that I'm not alone :) Do you know, or does anyone else know, where the server looks for the credentials when the challenge box has been submitted? In other words, does the entered username and password get passed as a specific header or a request parameter? Obviously 5 minutes of Googling would find me the answer, but since we're already here... :) I'm thinking that it shouldn't be at all difficult to write a BasicAuthFilter (assuming one doesn't already exist) for doing this, which would allow both of us to do what we want. Should be a simple matter of (a) sending back a 401 if no credentials are supplied, or (b) calling on the security provider to authenticate if they are. I would add such a filter to Java Web Parts, and with the expanded mapping capabilities we provide with those filters, it should do the trick nicely. Jay -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] Java Web Parts - http://javawebparts.sourceforge.net Supplying the wheel, so you don't have to reinvent it! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Somewhat OT: Multiple auth methods in one webapp?
On Thu, March 16, 2006 2:26 pm, Caldarale, Charles R said: From: Frank W. Zammetti [mailto:[EMAIL PROTECTED] Subject: RE: Somewhat OT: Multiple auth methods in one webapp? Do you know, or does anyone else know, where the server looks for the credentials when the challenge box has been submitted? See section 12.5 of the Servlet spec (you probably have that memorized by now) and RFC 2617, which covers both Basic and Digest authentication for HTTP. Thanks Chuck, saves me the time to find it. But no, I'm not the guy that memorizes specs, that is very clearly Craig McClanahan's title :) The man's instant recall of spec is astounding! - Chuck Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Disappointed
The Tomcat mailing list, like Tomcat itself, and like most open-source projects in general, are volunteer efforts. People will answer what they feel they can, when they can. You should start by having no expectation of getting an answer because you in fact may not, because no one knows the answer, because no one has the time to answer, or yes, because your question was silly (I don't know what your question was, so I cannot judge) or just because no one felt like answering. If people deem your question to be something you should be able to answer yourself without much trouble, you may not get an answer (or you may get a simple RTFM answer). As a volunteer endeavor, all of these are perfectly valid response, or non-responses, as the case may be. One thing to keep in mind is that the open-source community is sometimes not the friendliest place. Being nice is not valued as much as technical prowess is. Between you and me, it personally took me a good deal of time to come to this understanding too. I value people being cordial and helpful with each other, and I personally strive to bring those qualities to any post I make (sometimes I succeed and sometimes I don't!) but that is not a primary driver of a mailing list like this, technical discussion is. I think the de facto standard to go by is codified here: http://www.catb.org/~esr/faqs/smart-questions.html Read this and you will understand the community-driven projects like Tomcat a lot better I think and be able to interact better with them with the proper expectations. Frank Mike Sabroff wrote: I have read and sometimes participated in these postings and answers in hopes of either finding answers to problems I am having or might have in the future and found it a well organized and contained group. I am disappointed though, in that I have posted a question in hopes of help with a problem I am experiencing and notta zilch zap. No response of any kind. So I posted it again and whappo, forget you. No answer. Is it common to have to post several times before getting a response? Is there a time delay because of the numerous amounts of threads? Is it something I did? I see a lot of really dumb things going through the postings and most of the time I try to remember that I once new nothing of Tomcat too, and that I still don't know very much and that no question is too dumb. Is my question too dumb? Have I been Black-Listed because I had a cruel response on one of those days that I just couldn't hold it back anymore? WASSUP??? Mike - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Disappointed
Hehe, thanks for boiling my response down to a single line Leon! :) LOL Frank Leon Rosenberg wrote: http://www.catb.org/~esr/faqs/smart-questions.html :-) Leon On 3/9/06, Mike Sabroff [EMAIL PROTECTED] wrote: I have read and sometimes participated in these postings and answers in hopes of either finding answers to problems I am having or might have in the future and found it a well organized and contained group. I am disappointed though, in that I have posted a question in hopes of help with a problem I am experiencing and notta zilch zap. No response of any kind. So I posted it again and whappo, forget you. No answer. Is it common to have to post several times before getting a response? Is there a time delay because of the numerous amounts of threads? Is it something I did? I see a lot of really dumb things going through the postings and most of the time I try to remember that I once new nothing of Tomcat too, and that I still don't know very much and that no question is too dumb. Is my question too dumb? Have I been Black-Listed because I had a cruel response on one of those days that I just couldn't hold it back anymore? WASSUP??? Mike -- Mike Sabroff Web Services Developer [EMAIL PROTECTED] 920-568-8379 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Help with detecting session timeout
From an applet? There probably is no easy answer... any solution would involve either polling the server from the servlet, or pushing the status out to the servlet... the later should be doable from a SessionListener... record the remote IP when the session is created, and send a ping to it when the session expires. The problem with that though is when NAT and other address translation techniques get involved, there's a good chance it won't work. That's why polling is the more usual solution in situations like this. Frank Klotz Jr, Dennis wrote: Is there an easy way to detect that a session has timed out from within an applet? Regards, -Dennis - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [Friday] - finding the Mavens in the Java world
If one were being sarcastic and jaded (although a bit realistic at the same time unfortunately): select count(first_name) as c from [postings on tomcat.apache.org] where unemployed='T' and not_married='T' and no_kids='T' Since most of us with regular jobs don't generally have time to play with all the things we'd like to. (P.S., never do a count on *, it's less efficient :) ) -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Fri, February 3, 2006 1:18 pm, Daniel Blumenthal said: - select count(*) as c from [postings on tomcat.apache.org] group by email order by c desc, and then figure out which are the clued-in, and which are the clueless - repeat, with other listservs -Original Message- From: David Thielen [mailto:[EMAIL PROTECTED] Sent: Friday, February 03, 2006 12:59 PM To: tomcat-user@jakarta.apache.org Subject: [Friday] - finding the Mavens in the Java world Hi all; For those of you that have read The http://www.amazon.com/gp/product/0316346624/sr=1-1/qid=113858 9404/ref=pd_bb s_1/002-3569767-9990453?%5Fencoding=UTF8 Tipping Point, this will make sense (I think). For those that haven't, a maven is a person that trys just about every interesting program they see, and then tells others what they think about it. They're the ones the rest of us depend on to tell us what is worth trying and what new programs we should just skip. We want to give a free copy of Windward http://www.windwardreports.com/ Reports to all mavens in the Java (and .NET) programming world (value $1,134.00). No conditions or requirements or anything like that. A free regular copy with no limitations except that they cannot resell it. Why? We figure if we give them a copy, they might use it. And if they use it, we figure they'll probably post or write about it. So we're not asking them to do anything - but we figure our odds are pretty good they will. (Yes, we believe that much in our reporting engine.) So. Any ideas on how to find these people and make the offer to them? Thanks - dave David Thielen http://www.windwardreports.com www.windwardreports.com 303-499-2544 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Servlet filter on j_security_check
Yes, it is generically possible... I have the following mapping in one of my apps: filter-mapping filter-nameInitialLoginFilter/filter-name url-pattern/j_security_check/url-pattern /filter-mapping This runs on Websphere though, so maybe there is some limitation with Tomcat. In general though, it appears it is possible. One suggestion: change to a servlet mapping for the filter. IIRC, j_security_check is just a servlet that is set up by the container, so that might work. I kind of doubt it, but for the 30 seconds it'll take to try, worth a shot. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Thu, February 2, 2006 2:51 pm, Martin Dubuc said: I am using form based authentication in my application. I would like to know if it is possible to install a Servlet filter on j_security_check. I have tried to install one, but it never gets invoked. Here is my filter definition in application web.xml: filter filter-nameLoginFilter/filter-name filter-classLoginFilter/filter-class descriptionPerforms pre-login and post-login operation/description /filter filter-mapping filter-nameLoginFilter/filter-name url-pattern/j_security_check/url-pattern /filter-mapping I have some logs in the doFilter function. It seems like doFilter never gets called. However, if I set the url-pattern property to /*, doFilter gets called while rendering pages, but doesn't seem to be invoked from j_security_check. Comments? Suggestions? Martin - Bring words and photos together (easily) with PhotoMail - it's free and works with Yahoo! Mail. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Servlet filter on j_security_check
Well, there you go Martin :) Tim, is this something peculiar to Tomcat that doesn't allow it? As I mentioned in my previous post, I in fact do this in an app running on Websphere. Or, maybe its a case of Websphere letting me do something it really shouldn't? -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Thu, February 2, 2006 2:53 pm, Tim Funk said: You can't install a filter on j_security_check -Tim Martin Dubuc wrote: I am using form based authentication in my application. I would like to know if it is possible to install a Servlet filter on j_security_check. I have tried to install one, but it never gets invoked. Here is my filter definition in application web.xml: filter filter-nameLoginFilter/filter-name filter-classLoginFilter/filter-class descriptionPerforms pre-login and post-login operation/description /filter filter-mapping filter-nameLoginFilter/filter-name url-pattern/j_security_check/url-pattern /filter-mapping I have some logs in the doFilter function. It seems like doFilter never gets called. However, if I set the url-pattern property to /*, doFilter gets called while rendering pages, but doesn't seem to be invoked from j_security_check. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Servlet filter on j_security_check
Interesting. Thanks for that info! -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Thu, February 2, 2006 3:04 pm, Tim Funk said: If you want to be spec compliant. There is a bugzilla entry with respect to this and confirmation by the expert group that Tomcat's behavior is correct. -Tim Frank W. Zammetti wrote: Well, there you go Martin :) Tim, is this something peculiar to Tomcat that doesn't allow it? As I mentioned in my previous post, I in fact do this in an app running on Websphere. Or, maybe its a case of Websphere letting me do something it really shouldn't? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: From Java to C#, ASP.NET [Off Topic]
Martin Gainty wrote: we just inherited some vb code that accomplishes a cryptography algorithm just to get this to run under windoze took me 4 hours..the lack of VB doc was the blocking factor or maybe its probably because Im not a VB guy and never will be btw that same functionality can be accomplished with java libraries in under 1 hour Doesn't sound like a fair comparison to me... give me someone who's not a Java guy, like your not a VB guy, and ask them to do the same thing... it may well take the same amount of time. Your right in that the functionality is easier in Java, but would someone who isn't versed in Java know that, or be able to figure it out quite as fast? I doubt it. why? there are opensource sites located world-wide in other words A little digging and some hard work on anyone's part will always get you an answer I cannot say the same thing for VB Are you talking VB or VB.Net? If your talking VB, you aren't looking in the right places. There is *plenty* of readily-available knowledge out there about VB. VB.Net is a different story... it's newer, and the resources haven't had time to build up to the same level (true in general for .Net). Give it another year or two and see what's out there. I think it'll be comparable. BTW: (VB).Net is an example of market forces pushing a company MS to develop a product (.NET) that meets marketplace need I for one welcome MS into the OOA/OOD world I agree. And, this is one of the rare times that MS got it closer to right than wrong the very first time. It's not perfect, I don't think anyone is claiming it is (no one worth listening to anyway), but 1.0 wasn't bad at all, and 2.0 improves things from everything I've heard (I'm only a casual .Net user myself). Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: From Java to C#, ASP.NET [Off Topic]
Martin Gainty wrote: On the subject of doc ..I find any specifics about VB quite difficult to locate and blogs are not nearly as numerous as java Interesting. Although I don't consider blogs a source of worthwild information on anything (and yes, that includes my own!), I've always found a wealth of VB knowledge on the web. Probably not quite as much as Java, but still. I would strongly encourage every academic institution to replace their VB offerings with .NET to prepare their students for current as well as future markets (in general) and the OOD world (specifically) I'd agree with that. Although, considering the difficulty we are currently having at my company finding VB experts (I long since ceased being an expert myself), perhaps colleges *are* preparing their students for the work world ;) I know a COBOL programmer that just landed himself a job making more than I am! I wouldn't be surprised if VB is the next COBOL in that regard :) Frank Thanks Frank, M- - Original Message - From: Frank W. Zammetti [EMAIL PROTECTED] To: Tomcat Users List users@tomcat.apache.org Sent: Sunday, January 29, 2006 12:09 PM Subject: Re: From Java to C#, ASP.NET [Off Topic] Martin Gainty wrote: we just inherited some vb code that accomplishes a cryptography algorithm just to get this to run under windoze took me 4 hours..the lack of VB doc was the blocking factor or maybe its probably because Im not a VB guy and never will be btw that same functionality can be accomplished with java libraries in under 1 hour Doesn't sound like a fair comparison to me... give me someone who's not a Java guy, like your not a VB guy, and ask them to do the same thing... it may well take the same amount of time. Your right in that the functionality is easier in Java, but would someone who isn't versed in Java know that, or be able to figure it out quite as fast? I doubt it. why? there are opensource sites located world-wide in other words A little digging and some hard work on anyone's part will always get you an answer I cannot say the same thing for VB Are you talking VB or VB.Net? If your talking VB, you aren't looking in the right places. There is *plenty* of readily-available knowledge out there about VB. VB.Net is a different story... it's newer, and the resources haven't had time to build up to the same level (true in general for .Net). Give it another year or two and see what's out there. I think it'll be comparable. BTW: (VB).Net is an example of market forces pushing a company MS to develop a product (.NET) that meets marketplace need I for one welcome MS into the OOA/OOD world I agree. And, this is one of the rare times that MS got it closer to right than wrong the very first time. It's not perfect, I don't think anyone is claiming it is (no one worth listening to anyway), but 1.0 wasn't bad at all, and 2.0 improves things from everything I've heard (I'm only a casual .Net user myself). Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: From Java to C#, ASP.NET [Off Topic]
On Fri, January 27, 2006 8:11 am, David Smith said: I will say I have used their products to develop solutions in the past and it's ... well ... interesting. The stuff works well when you know how to use it. Unfortunately I found their docs no where near the quality of Tomcat or Java which prolonged development on something that should have been extremely simple. Wow, I've had just the opposite experience with their stuff. Especially in terms of documentation, I've always found MSDN to be some of the best documentation around, generally far superior to most open-source documentation (my guess is they have some generally non-technical editors looking it over... I can't imagine that quality of writing came from techies!) I will say though that they do tend to be a little short on examples, something open-source tends to have a lot more of. I think it's a difference in culture behind it... MS is coming from a more professional, business-like approach, and in that mindset writing documentation takes on more importance. In the open-source world, there's much more of the here's an example, go look at it and learn kind of mentality. I'm not making a judgment on which is better, I think they both have their pluses and minuses, just pointing out what I see as a difference. Also the whole C#/aspx design is centered around events just like Windows itself which I find just a little disconcerting. Not a problem if you're already familiar with programming in Access. I would prefer a cleaner, more visible flow. I'm not sure where the Access analogy comes in, but I do agree in that if you haven't done much with the event-driven model before then it can be a little disconcerting. I think we're seeing the same thing in the Java space with JSF right now... it's a basically event-driven model (they call it component-oriented, but it's in many ways the same thing), and this is somewhat new to many... ASP.Net is like bringing Windows programming to the web, whereas JSF is like bringing Swing to the web... imperfect analogies I suppose, but close enough :) Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Do idle servlets get unloaded/reloaded?
Hi Blair,
On Tue, January 24, 2006 2:41 pm, Blair Cooper said:
I have a servlet running on Tomcat 5.5. If it sits idle for a while and
then
I hit it, the init() method gets called again. autoDeploy is set to
false.
Is this expected behavior?
As per the servlet spec, the container can unload and reload a servlet as
needed. It is an expected *potential* behavior. My own personal
experience would indicate it's rare, but you have to design for it.
If this is expected, shouldn't destroy() get called at some point prior to
the init()?
I would expect destroy() to get called at some point before init() does a
second time, but I'm not sure if that is a guarantee of the spec. Seems
like it probably would be though.
The problem I'm having is that the init() method ends up try to recreate
objects that where created by a previous call to init(). My destroy()
method
would have cleaned up the earlier instances if it had been called. I have
logging in the destroy() method so I know that it didn't get called.
Implement some sort of check in init() to determine if it has fired
already or not. A simple static boolean field on the servlet should do
the trick. So, maybe you have:
private static boolean isInitialized;
Then in init(), you do:
synchronized (isInitialized) {
if (!isInitialized) {
// Do initialization tasks.
isInitialized = true;
}
}
Thanks,
Blair
Frank
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[OT-ANN] Java Web Parts v1.0 beta3
Hi all... I haven't been posting JWP release announcements here lately, and generally I will refrain from doing so, but the team just put out a new release last night and I think it has some features that might be of interest to many of you... * AjaxTags now has some new capabilities, including the ability to have multiple config files, the ability to have static parameters on the target URLs, a built-in debugging facility and an implicit passing in of the ajaxRef with each request, so now you can always determine which element fired the event. * The Chain implementation now supports loading config files from JAR files, and there is now a SimpleCommand that you can extend (instead of implementing Command) that has default implementations of all three Command methods (init(), execute() and destroy()), so you can only worry about the ones that interest you. * A new popup calendar widget has been added to the UIWidgets taglib. * JSDigester was added to the JSTags taglib. JSDigester, as you may be able to guess, is a client-side implementation of our beloved Commons Digester. It is not as full-featured as it's big brother, but it can come in *very* handy, just like the full-fledged Digester. Take care! -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: data file access for servlet
Hi Neha, You can basically put it wherever you want because your servlet can get direct file system access (I'm not sure this is true if deployed in an EAR, but I guess that's not an option here anyway). Where it *makes sense* to put it is up to you... if it's something specific to the webapp then it probably makes sense to put it somewhere in the webapp's directory structure, but if it's more a shared data type thing, it might make sense outside the webapp. Take a look here: http://cvs.sourceforge.net/viewcvs.py/javawebparts/javawebparts/WEB-INF/src/javawebparts/servlet/TextReturnerServlet.java?view=markup Scroll down to the init() method and see how it gets an InputStream to the itemsFile. This is how you can do it context-relative. If you want to go to something outside the webapp, take a look at ServletContest.getRealPath(). -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Wed, January 18, 2006 12:40 pm, Neha Narkhede said: Hi.. I am running a servlet which requires some data files. But I dont know where to paste those data files so that the servlet can find it. I have a servlet Indexer and so a folder 'Indexer in webapps. Please help.. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Size of session bean
That's an interesting question... looking at the code I wrote in Java Web Parts for the getSessionSize() method, I'm only taking into consideration the fields of the objects in session. I think this is OK because IIRC, when an object is serialized, only the non-transient values are considered. The methods don't factor into it because you aren't serializing the class definition, just the state of the object. If anyone knows differently I'd like to hear about it, but I believe how that method works yields an accurate result. If you want to see how I've done it, check out: http://javawebparts.sourceforge.net If you look at the javadocs, in the session package, there is a class called SessionSize that is used to get the size of a session object. You can grab the code and see how it's done, or just use it if that's your ultimate goal :) Frank Robert Palmer wrote: When calculating the size of a session bean to determine memory usage, what should be included and how is this done? Do the number of methods matter? The size of the code? Just the variables? I've read much about limiting the size of the session information but not how to do it. I have some fairly large classes in session context but they don't store very much. Thanks. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Spawning a thread
Most of the time people will tell you don't do it, but don't get any more specific than that. Generally-speaking, spawning a thread to process a request is somewhat of a bad idea because the container is not responsible for managing the thread and therefore you run some extra risks. But, if you have something like a background process that isn't tied to a request, with the caveat the other poster made about daemon status in mind, I've never had a problem, and I've done it quite a bit. I think the prudent advice is be careful. And, if you can do what you need to without spawning a thread, you might be saving yourself some trouble down the road. But, if you are careful and do it smartly, there isn't any definitive rule (that I am aware of) that says you can't do it. Thom Hehl wrote: Isn't there a caveat about spawning a new thread inside of a servlet? Thom Hehl Heavyweight Software for Heavyweight Needs www.heavyweightsoftware.com -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Spawning a thread
Just to clarify, George wasn't talking about a context listener thread. I suppose there *technically* is such a thing, but what he was referring to is spawning a thread *from* a context listener. Subtle semantic difference, but it completely changes the meaning :) Frank Thom Hehl wrote: Can you point me to some documentation about context listener threads? I have no idea what you're talking about. Thanks. George Sexton wrote: -Original Message- From: Frank W. Zammetti [mailto:[EMAIL PROTECTED] Sent: Saturday, January 14, 2006 1:20 PM To: Tomcat Users List Subject: Re: Spawning a thread risks. But, if you have something like a background process that isn't tied to a request, with the caveat the other poster made about daemon A good way of starting threads not tied to a request is to have a context listener class start the threads and handle any required shutdown. George Sexton MH Software, Inc. http://www.mhsoftware.com/ Voice: 303 438 9585 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Thom Hehl Heavyweight Software for Heavyweight Needs www.heavyweightsoftware.com -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Image Scaling Code
D'oh! Now *THAT* rings a bell :)
Mark Hagger wrote:
You need to have:
-Djava.awt.headless=true
in your java start up args, this will prevent it from trying to talk to an X
server. Obviously some image related stuff has to talk to an X server, but
just ImageIO stuff is fine.
Mark
On Thursday 12 January 2006 19:31, Frank W. Zammetti wrote:
I don't quite see how this is Tomcat-related, but...
Your code can't connect to your X server, which is necessary for many
Java graphics-related functions to work on a *nix system. I dealt with
this at one point when getting DataVision working on Linux, and I recall
the solution being something to do with an environment variable, but the
exact answer eludes me.
Actually, it looks like you *have* defined the environment variable
(DISPLAY in the stack trace rings a bell). Is X running? I believe it
has to be for this to work.
Frank
Justin Jaynes wrote:
Hello all,
I've written a java class to scale jpeg images. But I can't seem to get
it to work. Can anyone point me in the right direction?
Here is my code:
package com.everybuddystree;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
public class ImageScaler {
public ImageScaler() {
}
public boolean scaleImageByWidth(String fileName, int newWidth) {
File originalImage = new File(fileName);
try {
BufferedImage workingBufferedImage = ImageIO.read(originalImage);
int width = workingBufferedImage.getWidth();
int height = workingBufferedImage.getHeight();
Image workingImage = workingBufferedImage;
workingImage = (Image)workingImage.getScaledInstance(newWidth,-1,1);
BufferedImage finalImage = (BufferedImage)workingImage;
ImageIO.write(finalImage, jpg, originalImage);
return true;
} catch (IOException ex){
return false;
}
}
}
When I run the pass an image to the class using a jsp I get the
following errors from Tomcat:
HTTP Status 500 -
-
type Exception report
message
description The server encountered an internal error () that prevented
it from fulfilling this request. exception
javax.servlet.ServletException: Can't connect to X11 window server using
':0.0' as the value of the DISPLAY variable.
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageConte
xtImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContext
Impl.java:781)
org.apache.jsp.image_jsp._jspService(org.apache.jsp.image_jsp:158)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.jav
a:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802) root cause
java.lang.InternalError: Can't connect to X11 window server using ':0.0'
as the value of the DISPLAY variable.
sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53)
sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
java.security.AccessController.doPrivileged(Native Method)
sun.awt.X11GraphicsEnvironment.clinit(X11GraphicsEnvironment.java:131)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:164)
java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironm
ent.java:68) sun.awt.X11.XToolkit.clinit(XToolkit.java:96)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Class.java:164)
java.awt.Toolkit$2.run(Toolkit.java:821)
java.security.AccessController.doPrivileged(Native Method)
java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
java.awt.Image.getScaledInstance(Image.java:158)
com.everybuddystree.ImageScaler.scaleImageByWidth(ImageScaler.java:21)
org.apache.jsp.image_jsp._jspService(org.apache.jsp.image_jsp:114)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.jav
a:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802) note The
full stack trace of the root cause is available in the Apache
Tomcat/5.5.12 logs.
-
Apache Tomcat/5.5.12
-
Yahoo! Photos – Showcase holiday pictures in hardcover
Photo Books. You design it and we’ll bind it!
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http://www.omnytex.com
AIM
Re: login
What you describe is referred to as container-managed security, or J2EE Security. Here is a link I think may help you: http://www.onjava.com/pub/a/onjava/2002/06/12/form.html The actual configuration of the security constraints is J2EE-standard and pretty easy. The configuration of roles and groups and such is container-specific and while not usually difficult in any way, will vary from container to container. That link discusses Tomcat specifically though, so it should get you heading in the right direction. Frank Claudio Veas wrote: Hello group!! I wanted to make an authentication page for my web site and after some attemps I read that there was a way to configure the server so it could take care of it automaticaly so I want it to ask you if you could tell me how this is done because I havent being able to find any information about it. Thanks a lot Claudio Veas -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ServletContextListener - how to detect http path of web application?
[EMAIL PROTECTED] wrote: One reason a filter would be better is you can fully construct the URL dynamically, including the method and all that. Could you possibly map it to just the initial entry point of your app so that it doesn't fire with each request? Yeah I thought about that... unfortunately I can't be sure that the users will enter from the homepage or any other particular point. Yeah, I thought you might say that :) Another even more hack-ey solution might be to have a servlet that runs on startup, and from it fire off a request to a specific URL that goes through your filter. Your filter then calculates the app's URL and sticks it in application scope. The servlet is no longer needed, nor is the filter, and shouldn't affect anything after that. Seems like a lot of trouble for what your after though :) Although, how would the startup servlet know what the magic URL is? I guess it would have to start with the full URL of the app. Which is where we came in :) The startup servlet wouldn't, the filter would. The servlet just requests a resource in your webapp, and the filter calculates the URL and sticks it in application scope. Doesn't matter anyhow, it's working ok... Thanks a lot for your help. Your right, and I'm glad its working. The other suggestion is just a curiosity at this point :) Take care! Iain Frank - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ServletContextListener - how to detect http path of web application?
Tim is right, you can't do it directly. You *might* be able to construct it in a roundabout way though... Let's assumg you know the method, http vs. https, and its always one or the other. Let's also assume that the display-name element in web.xml names the application context (i.e., if the URL is http://myserver/myapp, then display-namemyappdisplay-name. I believe the following (without actually trying it) would work... String s = http://;; s += new InetAddress.getHostName(); s += / + servletContext.getServletContextName(); Kind of hack solution, but it might be OK for your application (assuming it actually works!) -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Wed, December 21, 2005 6:22 am, Tim Funk said: There is no way to detect the contextPath on servletInit. It can only be done after the first request. (Using HttpServletRequest.getContextPath()) -Tim [EMAIL PROTECTED] wrote: Hi, Apols for a newbie question, I didn't have much luck with the archives or in Google. In my ServletContextListener.contextInitialized method, I need to detect the public http path of my web app. i.e. http://servername/approot/ How can I do this? event.getServletContext().getResource(/) gives me jndi:/localhost/, not very helpful. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: making a singleton servlet
The problem you are trying to solve is not propely solved by trying to
limit the container to a single servlet instance (which you probably
cannot control anyway, unless your container allows some sort of
proprietary setting).
The way you should be thinking to solve this problem is a connection pool.
Your servlet needs to be written in a thread-safe manner anyway, and
that allows the same servlet instance to handle multiple requests at the
same time. Having a connection pool underneath that will allow you to
share your database connections efficiently.
There are numerous options for connection pooling... the first thing
you'll probably want to look into is what your container itself offers
in this area. Most containers have some sort of pooling facility
available. Another option is to build on top of a persistance framework
like Hibernate or iBATIS, both of which offer some degree of pooling
support. There are libraries for doing it as well, DBCP (a Jakarta
Commons package) for instance. You could always write your own, it
isn't too tough, but for something that has been done to death you are
definitely better off not bothering.
Of course, since your posting to the Tomcat list, I can tell you that
Tomcat offers such support:
http://tomcat.apache.org/tomcat-5.5-doc/jndi-datasource-examples-howto.html
Frank
James Black wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Caldarale, Charles R wrote:
From: James Black [mailto:[EMAIL PROTECTED]
Subject: re: making a singleton servlet
I am going to make my servlet be static, with the hope that
it will only have one instance running, regardless of how
many clients connect to it.
What do you mean by servlet be static? What syntactical construct are
you employing?
If you mean using static fields in your servlet class, then you will
have to make use of synchronization clauses to insure concurrent
requests are serialized. It's my understanding that the container
(Tomcat or whatever) is free to process as many requests in parallel as
needed, as well as create multiple servlet instances - see the servlet
spec.
What problem are you trying to solve?
My plan is to try:
public static class SomeServlet extends HttpServlet { ... }
That way there should only be one servlet.
I am writing a servlet to save grades to a database, but,
unfortunately, instructors will procrastinate like students do. So, I
expect that 2000+ instructors will submit their grades in the last hour
or so, before the deadline. If each instructor had their own db
connection then the system will be useless, as students won't be able to
get connections, since all the connections will be used up.
For the first test I want to limit them to only one connection that
will read from an input queue, and just process all the grades. Later it
may be bumped up to 20-50 connections, to speed it up.
That is the basic problem I am trying to solve.
I am actually using XmlHttpRequest to connect to the servlet so it
doesn't lock up the browser.
- --
Corruptisima republica plurimae leges. [The more corrupt a republic, the
more laws.]
Tacitus from Annals III, 116AD
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http://www.omnytex.com
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Yahoo: fzammetti
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Re: advice on auto logout servlet
You can do this strictly client-side, if requiring Javascript isn't a problem (which of course an AJAX-based solution does anyway). Just start a timer from the onLoad event on each page. When 20 minutes has elapsed, you can either pop an alert which is followed by a redirect to some appropriate page, or just do the redirect straight away, whatever you prefer. The down-side is that a user could disable Javascript after the timer has begun but before the timeout occurs. But, of course the session will still expire on the server, so it's probably not a big problem. And you'll need to keep your session timeout and client-side timeout values in sync, but that's pretty minor. Frank Jon Wingfield wrote: I did an AJAX version of this a couple of months ago. The slight gotcha is that the AJAX request prolongs the life of the session (you can't, it seems, override the cookie for AJAX requests) so the interval has to be slightly longer than the expiry time for the session. Reynir Hubner wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, I would suggest that you do this by using somethinglike JSON or AJAX. See jasonspec: http://www.crockford.com/JSON/index.html You could make the client query your server, in some interval and check the session state. hope it helps - -reynir Mark wrote: Is there any way to allow servlets to auto-logout a user when the timeout has been reached. Right now, I have tomcat configured for a 20 minute session timeout. When the session times out, the user gets no notification of this event. Is there any way to show the user that they have logged out? Thank you. -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFDeeqn19KgIQihNwgRAqT8AJ9ijf9kZZlldgjRTcAEtua+89enKQCgnqjm iuCZACbq4A/JkmtB5yiIc8M= =HSCq -END PGP SIGNATURE- - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSP processing other than .jsp?
FYI, I had a case once where I needed to make my CSS files JSP's because I was using HTC's and for some reason I couldn't get the path mappings to work right unless I used request.getContextPath() to prefix the HTC names... more than likely just my mistake somewhere, but making it a JSP (as Yaakov says, just renaming it to .jsp) did the trick. I would personally prefer that approach because should you ever need to move to another app server, or even a hosted environment like I moved to a few months back, this way you won't have to mess with server settings, or getting some grumpy old admin to do it :) Frank Yaakov Chaikin wrote: I assume you need this because you want to place some JSP code inside your stylesheet Two approaches: 1) If you know that ALL of your .css files will need to include JSP code in them, then go to tomcat_dir/conf/web.xml and add another servlet-mapping like so: servlet-mapping servlet-namejsp/servlet-name url-pattern*.css/url-pattern /servlet-mapping 2) If you need to place JSP code in just one or two .css files, I would not start messing with server specific configurations and just rename those .css files to have extension of .jsp. So, now you will have a stylesheet file with .jsp. It seems weird and unusual, but really doesn't make any difference as far as your HTML/JSP page is concerned. Just point the link to the .jsp page instead in your HTML/JSP page: link href=styles/myStyle.jsp rel=stylesheet type=text/css Hope that helps. Yaakov. On 11/16/05, Marten Lehmann [EMAIL PROTECTED] wrote: Hello, how can I define, that e.g. the extension .css shall be processed by tomcat same as a .jsp-file? Regards Marten - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: disabling sessions in certain parts of a webapp
That's weird... I actually had a part in my reply at the end that said something like this should work until some code after the filter tries to access session :) Yep, absolutely, if there's a possibility of that then the wrapper is definitely the way to go. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Wed, November 9, 2005 2:24 pm, Brian Moseley said: Frank W. Zammetti wrote: I can't think of any drawbacks to the filter, and tha's what I would have suggested. Although, it probably doesn't even have to be as complicated as a wrapper... simply check for an existing session for the paths you do want a session created for, and if none is present go ahead and create it. I *think* that would do the trick. well, i'm concerned about code executing further down the filter chain that calls request.getSession(). i don't own all of the code that i'm running :) that's why i thought of the wrapper. i can intercept calls to getSession() and always return null for the requests that should never get sessions, letting the calls through for the requests to the html ui. thanks for the feedback! - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Can a return statement cause a problem?
It might be interesting to look at the class file generated from your
JSP... many times things like this become fairly obvious when you see the
code that is actually being executed.
Also, if your using a JSP 2.0 container, you may be interested in playing
with tag files:
http://today.java.net/pub/a/today/2003/11/14/tagfiles.html
Kind of a good first step for playing with custom tags without quite as
much work.
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM: fzammetti
Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
On Fri, November 4, 2005 3:00 pm, Dola Woolfe said:
--- Bob Bateman [EMAIL PROTECTED] wrote:
On Fri, 4 Nov 2005 11:14:19 -0800 (PST)
Dola Woolfe [EMAIL PROTECTED] wrote:
Hi,
In one of my JSP pages (ErrorPage.jsp) I have the
following code.
%
if (display-nothing-only-forward) {
out.println(META to forward to another page in
0
seconds);
// return;
}
//Lot's more code
%
It works, but prints out unnecessary html before
it
forwards. But if I uncomment return it stops
working. I get
HTTP 500 - Internal server error
What could that be? In the tomcat console window,
I
get no indication that something is not right.
I would postulate that you are executing unnecessary
code.
*Disclaimer: The following is NOT compliant with MVC
best
practices...
In your JSP page, you *probably* want your if
(display-nothing-only-forward) statement to execute
if
there is nothing to do. If that is true, then after
your
closing brace with the META info in it, you probably
want
to use an 'else' clause and enclose the rest of your
code
in a set of braces.
In effect, what you've done is to tell the system to
put
the META statement out ONLY when there is nothing
else to
do - but the rest of your code runs all the time.
If you have sufficient experience, I would suggest
removing all of the java code from your JSP page and
putting the code into a Tag. Tags are really easy
to use
and keep your business logic seperate from your JSP
presentation. Of course, you'll still have to
generate
HTML in the Tag, but that's partly what tags are
for.
Bob
Hi Bob,
I have not used Tags and plan to take a look at them
soon.
Concerning the rest of your suggestion, having a big
else clause is precisely something I'm trying to
avoid. I always prefer
if (short_clause) {
//...
return;
}
//rest of code
to
if (short_clause) {
//...
return;
}
else {
//rest of code
}
Also, what I'm curious about is this; what I do may
not be a good coding practice, but what is causing the
error?
Thanks!
Dola
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Re: Problems with web.xml generated from RAD and from Ecplise.
A bug in RAD?!? Surely you jest! Ahem. ComicBookGuyRAD... Worst... IDE... EVER!/ComicBookGuy (Unfortunately, I may have no choice but to use it soon... it's the standard at my company, but I've been able to resist thus far. I can only hope my luck continues that way). -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com AIM: fzammetti Yahoo: fzammetti MSN: [EMAIL PROTECTED] On Wed, October 19, 2005 1:51 am, Wendy Smoak said: From: Richard Mixon [EMAIL PROTECTED] I'm pretty familiar with Tomcat, but have no idea what RAD is and how its Tomcat related. If you explain that someone might be able to better help. Rational Application Developer, I assume. The problem seems to be here: web-app id=WebApp_ID version=2.2 ... http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd; The first line says version 2.2 but then it goes on to use the 2.4 schema. No idea how to convince it to do otherwise, though... seems like a bug to me. If it's going to generate web.xml for you, it ought to know better than to mix and match versions. -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
