Struts-Chain Roadmap and Inevitable Cocoon Analogy
Hi all, I am an avid user of Cocoon and really love the sitemap concept. I am wondering if the current direction of the struts-chain component is to only manage action chaining.IMHO, Struts is great as a controller, but not nec. for the View in the MVC world. In other words, will it be possible to have an analogous process to Coccon pipelines in Struts or is it best to use the Cocoon plugin for "view" processing? I really enjoy how the seperation of concerns has been achieved with Cocoon, but for similar reasons, I cannot use Cocoon's Forms paradigm or Java Server Faces yet. Thanks in advance, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Struts-Chain Roadmap and Inevitable Cocoon Analogy
Don, Thanks for the prompt reply. Comments inline: > The difference as I see it is struts-chain benefits > the controller > process, in other words, the process that is global > to all requests. > The actual handling of the request, the "action", is > still one class. > Cocoon, as I understand it, works the other way > around with the global > request processing fixed, but a lot of flexibility > at the action > level. I feel having flexibility at the action level to be more desireable for performance reasons and fine-grained control over particular requests. For example, imagine I have a workflow component that evaluates if a given request is involved in a workflow. If this set of requests pertains only to certain URLs, why should every request have to go through this command? The same would apply for a Authentication command, a controller managing application integration, and so on... On the other hand, having a global view is already achievable via the Servlet's filter model. Perhaps the intention is not to rely on this implementaion specific? >Even then, Cocoon focuses more on the view > through the SAX > pipelines so it has a more robust view processing > model enabled > through SAX. I still think combining Struts and > Cocoon is the best > solution to get the best of both worlds - Struts for > controller > processing, Cocoon for view rendering. Throw in > Struts Flow > (http://struts.sf.net/flow) and you can still use > continuations-based > flowscript. I agree, although I am skeptical of the javascript approach. I have read that the performance is dramatically less and that the changes to the Rhino engine exist as a fork. Again, not sure if this is FUD, but it is a concern. My preference would be to output XML from Struts and pass it to a Coocon pipeline for processing the view. I have more research to do obviously and appreciate any feedback. That's about it, thanks. Julian > That is, at least, how I understand it today. I > know Ted was doing > some work in writing apps where there was no concept > of an "action", > but the action implementation simply looked up and > executed a chain > itself. As we get chain into Struts, we will see a > number of > possibilities open up that may redefine how we think > of actions. If > you have any ideas of a better way to use struts > chain, post some code > and/or thoughts. > > Don > > > On Wed, 10 Nov 2004 08:37:36 -0800 (PST), Julian > <[EMAIL PROTECTED]> wrote: > > Hi all, > > > > I am an avid user of Cocoon and really love the > > sitemap concept. I am wondering if the current > > direction of the struts-chain component is to only > > manage action chaining.IMHO, Struts is great > as a > > controller, but not nec. for the View in the MVC > > world. In other words, will it be possible to > have an > > analogous process to Coccon pipelines in Struts or > is > > it best to use the Cocoon plugin for "view" > > processing? I really enjoy how the seperation of > > concerns has been achieved with Cocoon, but for > > similar reasons, I cannot use Cocoon's Forms > paradigm > > or Java Server Faces yet. > > > > Thanks in advance, > > Julian > > > > = > > Live simply so others may simply live. > > > > -Ghandi > > > > Pluralitas non est ponenda sine neccesitate. > > "Entities should not be multiplied unneccesarily" > > > > -William of Occam > > > > __ > > Do you Yahoo!? > > Check out the new Yahoo! Front Page. > > www.yahoo.com > > > > > - > > 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] > > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Check out the new Yahoo! Front Page. www.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Struts-Chain Roadmap and Inevitable Cocoon Analogy
Joe, I wrote a long email explaining my position and it got deleted...errrgg! Anyway, my point came down to a simple statement: Struts needs to create a config file analagous to that of Cocoon's sitemap. My reasoning is as folllows: I see a webapp framework somewhat like message oriented middleware, but directed to the end client. It should be capable of handling various inputs on several different protocols. For example, handling POST requests from HTML browser or a SOAP requests from a BPEL-WS system...all while being able to validate input, initiate various processes, and finally generate a response. All this activity should be configurable based on the URL being requested at both the M and V levels of MVC. Finally, the Struts developer should be able to handle each request with any controller chain they choose and target several platforms. Cocoon manages this with the Forms framework...which is analogous in many ways to JSF. My skepticism arises from the constanly chagning face of the web, emerging protocols, and new target devices. I see no way that Cocoon forms or JSF renderkits can keep up with this change. In conclusion, it is a necessity to be able to plugin any new URL to a webserver and have it produce the desired view. I hope this makes sense and is not to broad of any answer. I more than happy to clarify. Comments appreciated, Julian --- Joe Germuska <[EMAIL PROTECTED]> wrote: > At 8:37 AM -0800 11/10/04, Julian wrote: > >Hi all, > > > >I am an avid user of Cocoon and really love the > >sitemap concept. I am wondering if the current > >direction of the struts-chain component is to only > >manage action chaining.IMHO, Struts is great as > a > >controller, but not nec. for the View in the MVC > >world. In other words, will it be possible to have > an > >analogous process to Coccon pipelines in Struts or > is > >it best to use the Cocoon plugin for "view" > >processing? I really enjoy how the seperation of > >concerns has been achieved with Cocoon, but for > >similar reasons, I cannot use Cocoon's Forms > paradigm > >or Java Server Faces yet. > > I don't think that there's any reason to limit > struts-chain to > "action chaining." There's no reason one couldn't > define view > processing chains as well. I don't know Cocoon well > enough to > explain how struts-chain would be used to make an > analogous process, > but it certainly sounds like something Struts Chain > could do. > > There's a lot of other discussion going on the user > list right now > about whether Struts needs a concept of a "view > controller" or not, > and if so, how one might implement it. > > Maybe you could articulate some of the shortcomings > you see in how > Struts fails "for the View in the MVC world" or what > you'd want to do > that it doesn't do now, in use-case terms. > > Joe > > PS as I was writing this, Don Brown responded, > pointing out correctly > that true pipelining won't be what Struts does, > since it's not using > SAX. However, you could probably approximate the > behavior by > chaining together commands which operate on the > context. > > -- > Joe Germuska > [EMAIL PROTECTED] > http://blog.germuska.com > "In fact, when I die, if I don't hear 'A Love > Supreme,' I'll turn > back; I'll know I'm in the wrong place." > - Carlos Santana = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[OT] User Preference System Design
Hi, I am a Struts Newbie and would appreciate if anyone could give me some pointers on a user preferences/ configuration system design. Perhaps a link to a good resource? I have an ASP system with several levels of "users" that are as broad as an organization and as fine-grained as an individual person with one role. I would like to have a preference system that can handle configuration and preference issues for the different levels of the application. The information stored in these configurations range from font colors and alert boxes to the availability of various modules in the web application. Currently the information is stored in xml files on the server's hard disk, but this will not suit a distributable environment. Any suggestions are greatly appreciated. Thanks in Advance, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] User Preference System Design
Hi, Thanks for the input. The Properties object is more inline with what I was thinking. The problem with it however, is that there can only be one key/value pair. I see no ability to have one key with multiple pairs other than doing comma delimitation. This is why XML was chosen originally. The problem with it now is that it is not stored in an RDBMS, and I am unaware of the scalability of a user preferences system based on XML.Comments/Suggestions? Thanks again, Julian --- Erik Weber <[EMAIL PROTECTED]> wrote: > I like java.util.Properties, or, if Strings aren't > good enough, another > wrapper for a Map that allows put/get of Objects but > that uses a > hierarchical default system like Properties does. > Properties has built > in load/save methods that you can use to store your > properties on disk > until you move them to a RDBMS. Base user has colors > A, B, C. Next > higher user needs to have a different color A but > inherit colors B and > C. Create his properties with the Base user > properties as the default, > then just put the new property A. Works nicely for > that sort of thing. > > Erik > > > Julian wrote: > > >Hi, I am a Struts Newbie and would appreciate if > >anyone could give me some pointers on a user > >preferences/ configuration system design. Perhaps > a > >link to a good resource? I have an ASP system with > >several levels of "users" that are as broad as an > >organization and as fine-grained as an individual > >person with one role. I would like to have a > >preference system that can handle configuration and > >preference issues for the different levels of the > >application. The information stored in these > >configurations range from font colors and alert > boxes > >to the availability of various modules in the web > >application. Currently the information is stored > in > >xml files on the server's hard disk, but this will > not > >suit a distributable environment. Any suggestions > are > >greatly appreciated. > > > >Thanks in Advance, > >Julian > > > >= > >Live simply so others may simply live. > > > >-Ghandi > > > >Pluralitas non est ponenda sine neccesitate. > >"Entities should not be multiplied unneccesarily" > > > >-William of Occam > > > > > > > > > > > > > >__ > >Do you Yahoo!? > >The all-new My Yahoo! - Get yours free! > >http://my.yahoo.com > > > > > > > >- > >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] > > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [OT] User Preference System Design
Michael, Very informative article. What are your thoughts on storing user preferences as xml in a user preferences table? I think your approach would work well, but I alreay have code for parsing XML files. Ultimately, I would like the benefits of storing this data in a database (security, scalability, distributable), but also the benefits of XML hierachies (1...* relationships, code generation tools). Thanks, Julian --- Michael Klaene <[EMAIL PROTECTED]> wrote: > I would say that 'system' level > configurations(applying to all users) could easily > be handled with XML files or properties files. User > preferences, since they are tied to a specific user, > IMO belong in the database, probably in a user > preferences table. I know XML is a popular choice - > you could create a seperate folder, for each user, > to hold user settings (like a preferences.xml file), > or you could store all user info in one monolithic > file. I don't much like either of these approaches. > I prefer to store application-specific > configurations in the database, using 'codelist' > tables. I wrote an article about it a few months > ago, have a look if you want: > > http://www.developer.com/db/article.php/3413151 > > I wrote an app where I stored all preferences in > codelist tables. Then, I had a user_preferences > table that, instead of referencing a preference_id > in a preference table, referenced a preference in a > codelist name which was about 5 characters in > length. > > Mike > > Daniel Perry <[EMAIL PROTECTED]> wrote: > The most common way to store more than one element > in a properties file is > to have more than one entry like the following: > > colour.count=3 > colour.0=red > colour.1=green > colour.2=blue > > So your code loads the property for colour.count and > loops through the other > properties. Not very elegant, but it works. > > Daniel. > > > -Original Message- > > From: Julian [mailto:[EMAIL PROTECTED] > > Sent: 17 November 2004 14:08 > > To: Struts Users Mailing List > > Subject: Re: [OT] User Preference System Design > > > > > > Hi, > > > > Thanks for the input. The Properties object is > more > > inline with what I was thinking. The problem with > it > > however, is that there can only be one key/value > pair. > > I see no ability to have one key with multiple > pairs > > other than doing comma delimitation. This is why > XML > > was chosen originally. The problem with it now is > > that it is not stored in an RDBMS, and I am > unaware of > > the scalability of a user preferences system based > on > > XML. Comments/Suggestions? > > > > Thanks again, > > Julian > > > > --- Erik Weber wrote: > > > > > I like java.util.Properties, or, if Strings > aren't > > > good enough, another > > > wrapper for a Map that allows put/get of Objects > but > > > that uses a > > > hierarchical default system like Properties > does. > > > Properties has built > > > in load/save methods that you can use to store > your > > > properties on disk > > > until you move them to a RDBMS. Base user has > colors > > > A, B, C. Next > > > higher user needs to have a different color A > but > > > inherit colors B and > > > C. Create his properties with the Base user > > > properties as the default, > > > then just put the new property A. Works nicely > for > > > that sort of thing. > > > > > > Erik > > > > > > > > > Julian wrote: > > > > > > >Hi, I am a Struts Newbie and would appreciate > if > > > >anyone could give me some pointers on a user > > > >preferences/ configuration system design. > Perhaps > > > a > > > >link to a good resource? I have an ASP system > with > > > >several levels of "users" that are as broad as > an > > > >organization and as fine-grained as an > individual > > > >person with one role. I would like to have a > > > >preference system that can handle configuration > and > > > >preference issues for the different levels of > the > > > >application. The information stored in these > > > >configurations range from font colors and alert > > > boxes > > > >to the availability of various modules in the > web > > > >application. Currently the information is > stored > > > in > > > >xml files on the server's hard
Re: [OT] User Preference System Design
Comments inline: --- Dakota Jack <[EMAIL PROTECTED]> wrote: > You received several answers about security, but > that is not what you > want, right? You want to be able to set and to > deliver user > preferences. Exactly. >As part of any suggestion about how > you should do this, > one would need to know what the app is all about. > Different solutions > for different problems is key, no? There are two types of data that I would want to access. One is user preferences and the other is user's application configuration. The preferences would include information about alert boxes, GUI skins, "favorites" information. The "favorites" information is related to the data that entered into frequently filed out forms (enabling the user to quickly auto-fill a form). The application configuration indicates what functionalities of the application are available for a particular user. A user would be able to inherit configurations and preferences from the group they belong to based on their role(s - this is a one-to-many relationship - 1 user --- * role(s)). The group would in turn inherit from the organization's (global) configurations and preferences. There are several organizations, each isolated from another, so the configurations would have to be uniquely associated with an organization and inspected at runtime. I currently am loading XML configs directly from the file system, but this will not work in a distributed environment serving several independent organizations. Users will be able to update some of the information in these configurations and preferences. Thanks a ton. Julian __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] User Preference System Design
I forgot to mention: 1) I cannot use Xindice since I do not feel it is viable. 2) I expect to have thousands of users with a moderate load. 3) I am leaning towards Michael's suggestion: http://www.developer.com/db/print.php/10920_3413151_1 Comment appreciated :) Thanks again, Julian __ Do you Yahoo!? Meet the all-new My Yahoo! - Try it today! http://my.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] User Preference System Design
Hey Michael,
Thanks for the input, you've offered me some great
insight. I was wondering if you may know a good
resource that discusses database design patterns like
the codelist or a line table? Otherwise, afaik I have
stored XML in the database and it's great if you just
transform it to an outputstream. However, trying to
make some decisions based on the xml requires parsing
into the application's domain model. This issue
concerns me when it comes to using XML for user
preferences. It sounds like your approach may be more
scalable. Ok, I have to think about it.
thanks again,
Julian
--- Michael Klaene <[EMAIL PROTECTED]> wrote:
> I'd like to learn more about storing XML in the
> database myself. I really haven't had much
> experience there so I couldn't say if it is
> beneficial or not. I started out as a database
> developer so I tend to rely heavily on the database
> for a number of things, system prefs being one of
> those things. Oracle( as I'm sure other vendors do
> as well) uses 'codelist' tables for storing a great
> deal of application metadata and I've always liked
> that approach.
>
> As I said, I wrote/am still writing a system where I
> define codelists that define different preferences
> ('show_x', 'hide_a'). A user preferences table
> contains user_id, but also columns name and value
> which would include 'show_x'/'true',
> 'hide_a'/'false').
>
> Mike
>
>
> Julian <[EMAIL PROTECTED]> wrote:
> I forgot to mention:
> 1) I cannot use Xindice since I do not feel it is
> viable.
> 2) I expect to have thousands of users with a
> moderate
> load.
> 3) I am leaning towards Michael's suggestion:
>
http://www.developer.com/db/print.php/10920_3413151_1
> Comment appreciated :)
>
>
> Thanks again, Julian
>
>
>
> __
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Validator PlugIn and PDAs
Hi all, I am sorry if this has been answered before, but the search functionality on the mailing list is down. So here it goes: Does the validator plugin have support for handheld browsers such as PocketPC or Palm? AFAIK, pocketPC only supports JScript so this may be a problem since all the files for scripting are written in Javascript. If PocketPC, etc. is not supported, is it possible to send different scripts to different clients types (e.g. Javascript to "normal" browsers and JScript to pocketPC IE)? Thanks in advance, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Common Chain 1.0 and Struts Chain
Hi, I was wondering if the release of Commons Chain 1.0 will enable a "Best Available" release of Struts with struts-chain? If not, how stable is the COR stuff in Struts? Thanks, Julian __ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Struts-Chain Nightly Build Is Empty
Hi, I am trying to download a build of struts-chain from http://cvs.apache.org/builds/jakarta-struts/nightly/struts-chain/ , but when I try to unzip any of the files, they are empty. Is this the wrong location for nightly builds or are they not available? Thanks, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Send holiday email and support a worthy cause. Do good. http://celebrity.mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[Struts-Chain] Only one chain for entire request lifecycle?
Hi, I was looking at the struts-chain config (http://cvs.apache.org/viewcvs.cgi/jakarta-struts/contrib/struts-chain/src/conf/chain-config.xml?rev=1.10&view=markup) and was wondering if one can apply different chains depending on the request URI? From what is available in the SVN repository it looks like all requests go through the "servlet-standard" chain. This leads me to presume one cannot define "servlet-standardA", "servlet-standardB", and so on...that would map to different requests. My hopes is that the chain mapping would be synonymous with Cocoon's sitemap concepts with several "pipelines". Thanks in advance, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Yahoo! Mail - You care about security. So do we. http://promotions.yahoo.com/new_mail - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [Struts-Chain] Only one chain for entire request lifecycle?
David, Comments inline: --- "David G. Friedman" <[EMAIL PROTECTED]> wrote: > Julian, > > If you just need to invoke a chain, you can make > your action be > "org.apache.struts.chain.legacy.ChainAction". Great thanks >If > you need some actions to > do chain "A" and some to do chain "B" THEN do > execute other logic in the > action, subclassing ChainAction might be the best > course. Your subclass > could have an execute() which calls super.execute(), > then calls your own > Java statements. Invoking different chains based on Action code is not what I had in mind. I think maybe I did not explain myself well enough. If I needed some actions to do chain "A" and some to do chain "B", why would I not do the following? I think we are on the same page and this is how one would do this. Correct me if I am wrong, but it seems the wonders of email have distorted the conversation ;) Thanks, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[Struts-Chain] Correct Me If I'm Wrong
Hi, ok, I've been looking at the struts-chain stuff and have been trying to figure out how to do sub-chains. The reason I wanted to do this was b/c I thought one had to start from the servlet-standard chain example in the SVN repository and insert more commands (or copy the whole to start a new chain). I know believe that it is only nec. if I want legacy support. However there is another request processor that would let me define my own chains from scratch that don't include all the steps in the "servlet-standard" chain. For example: So, I don't need ValidateActionForm, ExecuteAction, or any other commands in my chain (from SVN chain-config.xml), right? And the above chain will work perfectly fine. Also, what significance does the catalogName attribute have in the command tag? Are there any docs on struts-chain? Thanks, Julian __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Common Chain 1.0 and Struts Chain
Joe, Thanks a lot. I will plan on implementing the chain after a bit more due dilligence. btw, I agree on making a seperate jar for the set of commands which provide legacy support. Thanks. -Julian --- Joe Germuska <[EMAIL PROTECTED]> wrote: > At 6:28 AM -0800 12/10/04, Julian wrote: > >Hi, > > > >I was wondering if the release of Commons Chain 1.0 > >will enable a "Best Available" release of Struts > with > >struts-chain? If not, how stable is the COR stuff > in > >Struts? > > The struts-chain was working just fine against > pre-1.0 releases of > Struts Chain. If you're interested, there's no > reason to wait. It > will be longer before you can download a nightly > build of Struts > which uses the Chain request processor, but work on > that was mostly > waiting for the 1.0 release (and for time, which > unfortunately I've > had a short supply of, and this time of year, it > will continue that > way.) > > I have a few pending questions on the dev list that > I may need to > re-raise about a few implementation details, but now > that 1.0 is > fully released, I do hope to begin making changes to > the core code > base to use commons-chain and the Composable Request > Processor. I > don't see the point of just merging struts-chain > into the 'core' > project and cutting a release; rather, we'll want to > obsolete the > PlugIn which configures the command catalogs in > struts-chain in favor > of direct support in the ActionServlet. I am also > inclined to > package the set of commands which provide legacy > Struts support as a > separate JAR, rather than pushing a few dozen > classes into the core > which in some sense are legacy bound. (Whether > there's consensus on > that is one of the questions to re-raise on the dev > list.) > > I've been using struts-chain in a production project > for close to a > year now (including original development time). We > flushed a few > bugs out along the way, but it's fundamentally > stable with Struts > 1.2.x. > > Joe > > -- > Joe Germuska > [EMAIL PROTECTED] > http://blog.germuska.com > "Narrow minds are weapons made for mass destruction" > -The Ex > > - > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: [Struts-Chain] Only one chain for entire request lifecycle?
Joe, I am including a list of things from the top of my head that I like about Cocoon sitemaps, and how it translates into struts-chain. I would like to say that maybe this is a great area for cross-pollination. Why reinvent the wheel? Perhaps a commons package shared by the Cocoon developers and Struts developers for these webapp request processor configurations. On the other hand maybe it is too late for this type of activity? Anyway, here it goes: 1) The ability to declare variables that can be used throughout all chains (e.g. a variable defining a root jndi context name). The variable could be used in the chain to affect very basic flow. The variable also could be passed into the Command objects. 2) A reload attribute on the entire chain config or may be individual chains. This would enable faster development...if the config is changed, it is visible without a servlet container restart. 3) Chain definitions bound to a variable name (I believe Craig proposed this). This would be similar to Cocoon's cocoon.xconf's input/output modules in the WEB-INF dir: This particular snippet binds the string "request-param" to an object that allows one to access the request object of the servlet container...e.g. request-param:userID 4) URI protocol handling for initializing, pulling sources from, or redirecting to other chains. Similar to Cocoon's "cocoon:/" and "cocoon://" protocols. >From Cocoon's site: context:// - get a resource using the servlet context cocoon:/ - get a pipeline from the current sitemap cocoon:// - get a pipeline using the root sitemap resource:// - get a resource from the context classloader Well I think it is clear by now that I really like some of the Cocoon architecture ;). Anyway, I think the Cocoon sitemap paradigm is a developer's dream and nightmare at once. The dream is the URI handling with regex matching, sub-sitemaps, and the array of generators, transformers, and serializers. However, the nightmare is the learning curve and the bloat. I hope that by writing this email...this newbie can translate some Cocoon experience into something valuable for all. regards, Julian p.s. some resources http://cocoon.apache.org/2.1/userdocs/concepts/index.html http://cocoon.apache.org/2.1/userdocs/concepts/sitemap.html __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[Struts-Chain] Exception loading resources chain-config.xml
Hi, I cannot seem to load the struts-chain config properly. I have tried packaging it in the root directory of my jar, placing it in /WEB-INF/classes, and just in plain old WEB-INF...but to no avail. I keep getting an servletexception thrown at org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn.init(CatalogConfiguratorPlugIn.java:147) I have tried the following: Thanks in advance, Julian = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Struts-Chain] Exception loading resources chain-config.xml
btw, I have also tried the config with the "property" attribute of the "set-property" tag set as "path" instead of resource. wrote: > Hi, > > I cannot seem to load the struts-chain config > properly. I have tried packaging it in the root > directory of my jar, placing it in /WEB-INF/classes, > and just in plain old WEB-INF...but to no avail. I > keep getting an servletexception thrown at > org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn.init(CatalogConfiguratorPlugIn.java:147) > I have tried the following: > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="/chain-config.xml"/> > > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="chain-config.xml"/> > > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="/WEB-INF/chain-config.xml"/> > > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="WEB-INF/chain-config.xml"/> > > > Thanks in advance, > Julian > > = > Live simply so others may simply live. > > -Ghandi > > Pluralitas non est ponenda sine neccesitate. > "Entities should not be multiplied unneccesarily" > > -William of Occam > > > > > > > __ > Do you Yahoo!? > Take Yahoo! Mail with you! Get it on your mobile > phone. > http://mobile.yahoo.com/maildemo > > - > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? All your favorites on one personal page Try My Yahoo! http://my.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Struts-Chain] Exception loading resources chain-config.xml
Hi again :) well, i wrapped the class and had it print out the variables for the path, resource, and configResource to the logswell no surprise they were all null. I used your config below and placed the chain-config.xml in the WEB-INF dirroot cause: java.lang.NullPointerException. So perhaps I do not have the right struts-chain jar? It is titled struts-chain-0.5-dev.jar. I find this doubtful...since it seems that the properties are just not getting set. any ideas? could this be some crazy classpath issue? Thanks again, Julian --- Joe Germuska <[EMAIL PROTECTED]> wrote: > Here's one which works in my application: > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="/WEB-INF/chain-config.xml" /> > > > If the "path" property is set, then the file is > sought in the servlet context. It sounds as > though you've tried this, but thought I'd give > you an example anyway. > > if the "resource" property is set, then the file > is sought on the classpath, and if it's in the > root of a JAR or WEB-INF/classes, I'd think this > would work: > > > >> > > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="chain-config.xml"/> > >> > > Technically, "resource" is evaluated first. > > Is it possible to catch the exception and call > ex.getRootCause() ? Perhaps you could write a > very simple subclass of CatalogConfiguratorPlugIn > which just catches the exception and inspects the > root cause? Maybe it's a parsing error or > something instead of a file-not-found problem? > > Joe > > > > > At 11:34 AM -0800 12/20/04, Julian wrote: > >btw, I have also tried the config with the > "property" > >attribute of the "set-property" tag set as "path" > >instead of resource. > > > > > > > > >-Julian > > > >--- Julian <[EMAIL PROTECTED]> wrote: > > > >> Hi, > >> > >> I cannot seem to load the struts-chain config > >> properly. I have tried packaging it in the root > >> directory of my jar, placing it in > /WEB-INF/classes, > >> and just in plain old WEB-INF...but to no avail. > I > >> keep getting an servletexception thrown at > >> > >org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn.init(CatalogConfiguratorPlugIn.java:147) > >>I have tried the following: > >> > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="/chain-config.xml"/> > >> > >> > > >> > > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="chain-config.xml"/> > >> > > > > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="/WEB-INF/chain-config.xml"/> > >> > >> > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="WEB-INF/chain-config.xml"/> > >> > >> > >> Thanks in advance, > >> Julian > >> > >> = > >> Live simply so others may simply live. > >> > >> -Ghandi > >> > >> Pluralitas non est ponenda sine neccesitate. > >> "Entities should not be multiplied > unneccesarily" > >> > >> -William of Occam > >> > >> > >> > >> > >> > >> > >> __ > >> Do you Yahoo!? > >> Take Yahoo! Mail with you! Get it on your mobile > >> phone. > >> http://mobile.yahoo.com/maildemo > >> > >> > >- > >> To unsubscribe, e-mail: > >> [EMAIL PROTECTED] > >> For additional commands, e-mail: > >> [EMAIL PROTECTED] > >> > >> > > > > > >= > >Live simply so others may simply live. > > > >-Ghandi > > > >Pluralitas non est ponenda sine neccesitate. > >"Entities should not be multiplied unneccesarily" > > > >-William of Occam > > > > > > > > > > > > > >__ > >Do you Yahoo!? > >All your favorites on one personal page ñ Try My > Yahoo! > >http://my.yahoo.com > > > >- > >To unsubscribe, e-mail: > [EMAIL PROTECTED] > >For additional commands, e-mail: > [EMAIL PROTECTED] > > > -- > Joe Germuska > [EMAIL PROTECTED] > http://blog.germuska.com > "Narrow minds are weapons made for mass destruction" > -The Ex > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Struts-Chain] Exception loading resources chain-config.xml
ok here is some more info. In my subclass of CatalogConfiguratorPlugIn, I logged any calls to setPath or setResource. So when the server starts the values are never set b/c the methods are never called. When I harcode the value, I get an error message that the catalog "struts" cannot be found. This seems to me that despite hardcoding the file path, it still is not found. -Julian --- Joe Germuska <[EMAIL PROTECTED]> wrote: > Here's one which works in my application: > > className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > value="/WEB-INF/chain-config.xml" /> > > > If the "path" property is set, then the file is > sought in the servlet context. It sounds as > though you've tried this, but thought I'd give > you an example anyway. > > if the "resource" property is set, then the file > is sought on the classpath, and if it's in the > root of a JAR or WEB-INF/classes, I'd think this > would work: > > > >> > > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="chain-config.xml"/> > >> > > Technically, "resource" is evaluated first. > > Is it possible to catch the exception and call > ex.getRootCause() ? Perhaps you could write a > very simple subclass of CatalogConfiguratorPlugIn > which just catches the exception and inspects the > root cause? Maybe it's a parsing error or > something instead of a file-not-found problem? > > Joe > > > > > At 11:34 AM -0800 12/20/04, Julian wrote: > >btw, I have also tried the config with the > "property" > >attribute of the "set-property" tag set as "path" > >instead of resource. > > > > > > > > >-Julian > > > >--- Julian <[EMAIL PROTECTED]> wrote: > > > >> Hi, > >> > >> I cannot seem to load the struts-chain config > >> properly. I have tried packaging it in the root > >> directory of my jar, placing it in > /WEB-INF/classes, > >> and just in plain old WEB-INF...but to no avail. > I > >> keep getting an servletexception thrown at > >> > >org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn.init(CatalogConfiguratorPlugIn.java:147) > >>I have tried the following: > >> > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="/chain-config.xml"/> > >> > >> > > >> > > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="chain-config.xml"/> > >> > > > > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="/WEB-INF/chain-config.xml"/> > >> > >> > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> value="WEB-INF/chain-config.xml"/> > >> > >> > >> Thanks in advance, > >> Julian > >> > >> = > >> Live simply so others may simply live. > >> > >> -Ghandi > >> > >> Pluralitas non est ponenda sine neccesitate. > >> "Entities should not be multiplied > unneccesarily" > >> > >> -William of Occam > >> > >> > >> > >> > >> > >> > >> __ > >> Do you Yahoo!? > >> Take Yahoo! Mail with you! Get it on your mobile > >> phone. > >> http://mobile.yahoo.com/maildemo > >> > >> > >- > >> To unsubscribe, e-mail: > >> [EMAIL PROTECTED] > >> For additional commands, e-mail: > >> [EMAIL PROTECTED] > >> > >> > > > > > >= > >Live simply so others may simply live. > > > >-Ghandi > > > >Pluralitas non est ponenda sine neccesitate. > >"Entities should not be multiplied unneccesarily" > > > >-William of Occam > > > > > > > > > > > > > >__ > >Do you Yahoo!? > >All your favorites on one personal page ñ Try My > Yahoo! > >http://my.yahoo.com > > > >- > >To unsubscribe, e-mail: > [EMAIL PROTECTED] > >For additional commands, e-mail: > [EMAIL PROTECTED] > > > -- > Joe Germuska > [EMAIL PROTECTED] > http://blog.germuska.com > "Narrow minds are weapons made for mass destruction" > -The Ex > = Live simply so others may simply live. -Ghandi Pluralitas non est ponenda sine neccesitate. "Entities should not be multiplied unneccesarily" -William of Occam __ Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more. http://info.mail.yahoo.com/mail_250 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [Struts-Chain] Exception loading resources chain-config.xml
Joe, I told a lie...I actually took the code from the SVN repository, and just added some logging. The logging is showing up and indicates that the path or resource Strings are not being set. I am also using the validator plugin. I am using Struts-1.2.4. Thanks for your help, but I do not have the time to play with this anymore. I will revisit this problem in a week or so. I have a feeling that something is not working right...so I am going to do a clean install (on the server :( ) when I next have the time. At that point, I hope to trek forward with the COR implementation. Thanks for all, Julian --- Joe Germuska <[EMAIL PROTECTED]> wrote: > At 12:43 PM -0800 12/20/04, Julian wrote: > >ok here is some more info. In my subclass of > >CatalogConfiguratorPlugIn, I logged any calls to > >setPath or setResource. So when the server starts > the > >values are never set b/c the methods are never > called. > > When I harcode the value, I get an error message > that > >the catalog "struts" cannot be found. This seems > to > >me that despite hardcoding the file path, it still > is > >not found. > > Is anything at all being logged by your subclass > of the plugin? Did you remember to call > super.init(...) in your subclass? ;-) > > Are you using any other plugins? Are you using > set-property anywhere else? Which version of > Struts are you using? > > This is exceedingly strange... > > Joe > > > >-Julian > > > >--- Joe Germuska <[EMAIL PROTECTED]> wrote: > > > >> Here's one which works in my application: > >> > >> >> > >className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >>>> value="/WEB-INF/chain-config.xml" /> > >> > >> > >> If the "path" property is set, then the file is > >> sought in the servlet context. It sounds as > >> though you've tried this, but thought I'd give > >> you an example anyway. > >> > >> if the "resource" property is set, then the file > >> is sought on the classpath, and if it's in the > >> root of a JAR or WEB-INF/classes, I'd think this > >> would work: > >> > >> > >>> > > > >> > >>className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> >> >> value="chain-config.xml"/> > >> >> > >> > >> Technically, "resource" is evaluated first. > >> > >> Is it possible to catch the exception and call > >> ex.getRootCause() ? Perhaps you could write a > >> very simple subclass of > CatalogConfiguratorPlugIn > >> which just catches the exception and inspects > the > >> root cause? Maybe it's a parsing error or > >> something instead of a file-not-found problem? > >> > >> Joe > >> > >> > >> > >> > >> At 11:34 AM -0800 12/20/04, Julian wrote: > >> >btw, I have also tried the config with the > >> "property" > >> >attribute of the "set-property" tag set as > "path" > >> >instead of resource. > >> > > >> > >> > > >> > > >> >-Julian > >> > > >> >--- Julian <[EMAIL PROTECTED]> wrote: > >> > > >> >> Hi, > >> >> > >> >> I cannot seem to load the struts-chain > config > >> >> properly. I have tried packaging it in the > root > >> >> directory of my jar, placing it in > >> /WEB-INF/classes, > >> >> and just in plain old WEB-INF...but to no > avail. > >> I > >> >> keep getting an servletexception thrown at > >> >> > >> > >>org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn.init(CatalogConfiguratorPlugIn.java:147) > >> >>I have tried the following: > >> >> > >> >> >> >> > >> > >>className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn"> > >> >> >> >> value="/chain-config.xml"/> > >> >> > >> >> > >> > >>> > > > >> > >>className="org.apache.struts.chain.legacy.CatalogConfiguratorPlugIn">
How to disable URL rewriting for session id?
Dear All, The html:link tag automatically applies URL rewriting to maintain session state in the absence of cookies. Is it possible to disable this feature? [I'm using Resin in a shared environment. Resin considers the sessionid as part of the URL address, and hence I get 404 errors.] Also, as an aside, even if cookies are accepted by the browser, I've noticed that sessionid still periodically appears in the URL. Is this to be expected?? Cheers. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to disable URL rewriting for session id?
Michael Jouravlev wrote: On 6/30/05, Julian Kerr <[EMAIL PROTECTED]> wrote: The html:link tag automatically applies URL rewriting to maintain session state in the absence of cookies. Is it possible to disable this feature? Have you tried <%@ page session="false" %> ? Michael. I am using sessions, but track them with cookies. I'd like to disable url rewriting because of the combination of: 1) empirical testing shows that url rewriting sometimes occurs even when cookies are enabled 2) my context doesn't deal with rewritten url's (as described in the initial post) If I can turn url rewriting off, the application will work in the given context for people with cookies enabled. A plain old html link would do the trick, but I'm keen to know if there is a way to control the behaviour struts tags. -- Julian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to disable URL rewriting for session id?
Ahh, the problem spreadeth... also need to use plain old forms, which means no struts help there either. Guess this boils down to either finding a way to tell struts to stop rewriting url's, or another moving to another context... Julian Wendy Smoak wrote: From: "Julian Kerr" <[EMAIL PROTECTED]> A plain old html link would do the trick, but I'm keen to know if there is a way to control the behaviour struts tags. Just based on the docs, I'd say no... but I haven't looked any further than that. http://struts.apache.org/userGuide/struts-html.html#link says " URL rewriting will be applied automatically, to maintain session state in the absence of cookies. " Can you do URL-rewriting-in-reverse on the front end, and strip off the ;jsessionid on the way in, before it causes a problem? Otherwise a plain old HTML link sounds like the way to go. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to disable URL rewriting for session id?
David G. Friedman wrote: I just skimmed through cvs and have this idea for you: Edit a copy of the Html Taglib's helper class, org.apache.struts.taglibs.TagUtils, so any methods that would pull in the session variable to append to the new URL don't do that. When it's built, put it under WEB-INF/classes/org/apache/struts/taglibs so Struts calls YOUR class, not the original. David, Nice plan! I basically did as you suggested, and automatic URL rewriting no longer takes place. (Removed calls to HttpServletResponse.encodeURL within org.apache.struts.taglib.TagUtils and org.apache.struts.taglib.html.FormTag) Thanks, Julian - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: ActionForm Stringvariables
ah, ok, well thanks, that was rather illuminating :) thanks a thousand Julian > --- Ursprüngliche Nachricht --- > Von: "Leon Rosenberg" <[EMAIL PROTECTED]> > An: "Struts Users Mailing List" > Betreff: Re: ActionForm Stringvariables > Datum: Thu, 16 Mar 2006 14:19:41 +0100 > > well, two reasons, the practical one: > checks for null are annoying, and people tend to lazily forget them. > > the more theoretical reason, is that null is not a truly OO concept > (at least according to some authors), and you should use a NullObject > concept (being of same type as your normal Object expected by the > code) instead. In opposite to the NullObject the null misses important > semantics about the objects structure. > > Using null for string initialization is an entry point to bad > practices, absolutely 'bad' are following practices: > > putting null in lists/maps > transporting null over network (rmi,corba,soap etc) > putting null beans in scopes (not sure this works, but should never > bin tried :-)) > returning null from functions instead of more meaningfull reply: >For example getUser(String userName) should throw a > NotSuchUserException if there is no corresponding User object instead > of returning null. There are very few scenarios (mostly high > performance, where null is actually expected - i.e. caches) where this > rule can be broken. > > I think you can find more examples in a good pattern book :-) > > HTH > Leon > > > On 3/16/06, manny Calaverra <[EMAIL PROTECTED]> wrote: > > hi Leon, > > > > is this rule because of the NullPointerException you get when, for > example > > you check the Strings ".length()" or is there (also) another reason for > this > > practice? > > > > thanks in advance > > Julian > > > > > --- Ursprüngliche Nachricht --- > > > Von: "Leon Rosenberg" <[EMAIL PROTECTED]> > > > An: "Struts Users Mailing List" > > > Betreff: Re: ActionForm Stringvariables > > > Datum: Thu, 16 Mar 2006 11:06:50 +0100 > > > > > > 1. The general rule is: never use null. > > > 2. The specific rule for your application must be given by your > > > application, but in doubt the general rule applies. > > > > > > regards > > > leon > > > > > > On 3/16/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > Hi there, > > > > > > > > I'm a newbie to struts and I have a question concerning ActionForms. > > > > What's more clever: to initialize the String-parameters with "null" > or > > > with > > > > "" (empty strings)? > > > > > > > > thx & ciao 4 now > > > > Julian > > > > > > > > > > > > -- > > > > "Feel free" mit GMX FreeMail! > > > > Monat für Monat 10 FreeSMS inklusive! http://www.gmx.net > > > > > > > > > - > > > > 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] > > > > > > > -- > > Echte DSL-Flatrate dauerhaft für 0,- Euro*! > > "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl > > > > - > > 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] > -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Strategy for Controlling the Session Size
Hi
Can someone give me advice how to control and clean
the amount of Collections (HashTables/ArrayList)
that are stored in the session.
My first consideration goes in the direction to
use a naming-strategy for all lists to be used in a session
(eg session.setAttribute("collection_name",
and always when an action is executed
to look
for all parameters if session.getAttribute.equals("collection_name
and to remove all last Action's Collection_data in order to minimalize my
session data.
Regarding to you, does it make sense to control the session-size
within a struts application this way.
Thanks a lot for your opinion!!
--
"Feel free" mit GMX FreeMail!
Monat für Monat 10 FreeSMS inklusive! http://www.gmx.net
--
"Feel free" mit GMX FreeMail!
Monat für Monat 10 FreeSMS inklusive! http://www.gmx.net
-
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Re: Strategy for Controlling the Session Size
Hi
Thank you for your answer!
Basically we have to save
collections in the session because
we use displaytag and both the export-function
and the sort function requires the lists
to be safed in session.
I think a kind of pool cannot solve the problem
because of that.
This listener sounds very interesting I'll
take a look.
As a last resort would my proposal be an
acceptable alternative?
greetings
> --- Ursprüngliche Nachricht ---
> Von: "Mark Lowe" <[EMAIL PROTECTED]>
> An: "Struts Users Mailing List"
> Betreff: Re: Strategy for Controlling the Session Size
> Datum: Wed, 22 Mar 2006 11:34:31 +0100
>
> On 3/22/06, Julian Tillmann <[EMAIL PROTECTED]> wrote:
> > Hi
> >
> > Can someone give me advice how to control and clean
> >
> > the amount of Collections (HashTables/ArrayList)
> >
> > that are stored in the session.
>
> If you do find you need collections stored in httpsession, i wouldn't
> use hashtable.
>
> >
> > My first consideration goes in the direction to
> >
> > use a naming-strategy for all lists to be used in a session
> >
> > (eg session.setAttribute("collection_name",
> >
> > and always when an action is executed
> >
> > to look
> >
> > for all parameters if session.getAttribute.equals("collection_name
> >
> > and to remove all last Action's Collection_data in order to minimalize
> my
> >
> > session data.
> >
> >
> >
> > Regarding to you, does it make sense to control the session-size
> >
> > within a struts application this way.
>
> The size of the session can effect clustering, and is also expensive
> in a standalone envionment. But that aside it becomes harder to
> maintain applications when developers are using session at each and
> every oppertunity. You can use a session attribute listener to see
> where things are being added, but life is generally easier if session
> is used as little as possible. I recently worked on some legacy apps
> where session had been used over liberally and performance issues
> aside you couldn't work out what the state the application was in.
>
> For data you need to store across lots of requests, you can create a
> simple javaclass to hold the data you need. Something like a StateBean
> or even a hashmap, the point is that if you have one object that your
> storing things in you know where to look if and when you find you need
> to address session size. If you have folk adding the world into the
> session all over the place, its going to be harder to address any
> issues later in the day. e.g. Map state = (Map)
> session.getAttribute("state")
>
> Your post will probably provoke some fanaticism claiming "sessions are
> evil" , "never use sessions" and such like. IMO you want to use it as
> little as possible, and when you do know where its been used.
>
> I guess the question is, what are you thinking of putting in your session?
>
> Mark
>
> >
> >
> >
> > Thanks a lot for your opinion!!
> >
> > --
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> >
>
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Re: Strategy for Controlling the Session Size
thanks for all your ideas and advice especially the one with the filter was very helpful. :) ciao 4 now Julian > --- Ursprüngliche Nachricht --- > Von: "Mark Lowe" <[EMAIL PROTECTED]> > An: "Struts Users Mailing List" > Betreff: Re: Strategy for Controlling the Session Size > Datum: Wed, 22 Mar 2006 23:56:20 +0100 > > On 3/22/06, Michael Jouravlev <[EMAIL PROTECTED]> wrote: > > On 3/22/06, Mark Lowe <[EMAIL PROTECTED]> wrote: > > > Population of indexed properties is a nice gift, but then I cant think > > > of many situations where needing to scope anything that extreme is > > > required. A bean with simple properties will do > > > > > > > > > > > > > > > takes care of any simple properties > > > > I don't want to argue with you either :) I use session-scoped > > actionforms, so it is simpler for me to stick everything related to a > > resource in an actionform. > > > > > Another consideration is the increased popularity of xmlhttprequest to > > > have the client make requests, if a front end updates from the server > > > at any intervals. All you need is are users leaving a browser window > > > open to increase the amount of active sessions on the container. > > > > I don't use Ajax autoupdate. But even if I did I would use session to > > store Ajax-related stuff. Otherwise when a user hits Reload button, > > all stuff is gone. Check out Backbase Pet Shop demo. Apparently these > > guys don't use session. Pet Shop is a demo, but I would not want to > > lose my shopping cart because of accidental refresh. > > Yeah, i'd store ajax related requests the same as I would for non ajax > requests as well.. And better an actionform than having n amount of > attributes that are hard to keep track of. Cant say i see the value in > a ajax shopping cart but interesting link. > > > > > Michael. > > > > - > > 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] > -- Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
User Restriction in a web application?
Hi, I'd like to implement the following: In a web application a function should only be used by ONE user and if another user comes along it should show him the first user's name and give him the choice whether to kick the first user out or not. Is there perhaps something like that in Java? thx & ciao 4 now Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Replacing Validator 1.2 with 1.3?
Hi again, just a quick question: what's your experience with replacing Validator V1.2 with V1.3, what problems did occur, what did you have to keep an eye on or did it just work fine? ciao 4 now Julian -- Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Replacing Validator 1.2 with 1.3?
Oh that sounds great, thanks :) Julian > --- Ursprüngliche Nachricht --- > Von: "Niall Pemberton" <[EMAIL PROTECTED]> > An: "Struts Users Mailing List" > Betreff: Re: Replacing Validator 1.2 with 1.3? > Datum: Thu, 30 Mar 2006 14:32:07 +0100 > > It worked just fine - in fact it works better IMO because there are a > number of bugs fixed :-) > > Niall > > On 3/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > Hi again, > > > > just a quick question: what's your experience with replacing Validator > V1.2 > > with V1.3, what problems did occur, what did you have to keep an eye on > or > > did it just work fine? > > > > ciao 4 now > > Julian > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- E-Mails und Internet immer und überall! 1&1 PocketWeb, perfekt mit GMX: http://www.gmx.net/de/go/pocketweb - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
"Valid when"-Example
Hi, would someone be so kind to help me with the following problem: A date field should only be validated if another checkbox isn't selected. I'm not sure how to do it: Do I have to use validwhen or reiqired-if?? I cannot find any good examples or references concerning my problem. Here is my code snippet: var //-->this is the property that should decide if a check is necessary or not (the bean-property of a html-checkbox) (selectionForShift==false) Help would be highly appreciated as this is really driving me crazy Thanks a lot Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl -- GMX Produkte empfehlen und ganz einfach Geld verdienen! Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Validwhen
Hi I tried now for several hours to fix my validwhen-example. The property time should only be validated if the checkbox (property calculatingShift) Is not checked. How can help me? Thank you so much! test (calculatingShift==false) datePatternStrict HH:mm On tomcat the error message is: No input attribute for mapping path -- E-Mails und Internet immer und überall! 1&1 PocketWeb, perfekt mit GMX: http://www.gmx.net/de/go/pocketweb - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Any relation imaginable between Struts and HiveMind?
Hi, today I stumbled across the jakarta project "HiveMind", where you can develop services, that work between your application code and the underlying J2EE. Has someone an idea on or any experience from practicing a combination between HiveMind and struts? I haven't got a clue on how I could use this, but perhaps anyone can give me an idea ... regards Julian -- GMX Produkte empfehlen und ganz einfach Geld verdienen! Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Extracting MessageResources from Struts
Hi everyone, this question is not entirely a question about struts but just about a part of it, which I would like to extract from the rest of the framework. It's like this: I have my own framework for creating dynamic SVGs and in one Class I have tooltip-messages hardcoded in German. I don't want to destroy the structure of the method-calls and so I thought about Struts MessageResources where I can use different language packages in form of property files. So far so good, but I don't want to add the whole struts to my framework but just the MessageRessources-part and so my question is: can I just extract the MessageResources.class or is there substitution I can use for this? thanks very much in advance Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Extracting MessageResources from Struts
hi, thank you very much your answer has been very helpful :) ciao 4 now Julian > --- Ursprüngliche Nachricht --- > Von: David Delbecq <[EMAIL PROTECTED]> > An: Struts Users Mailing List > Betreff: Re: Extracting MessageResources from Struts > Datum: Mon, 24 Apr 2006 13:37:45 +0200 > > Using message ressources is not struts specific. What struts does beside > using message ressources is maintaining the user language in user http > session and use it when it need a message ressouce use. If all you need > to do is have multi language support for your messages, i suggest you > take a look at how ressource bundles are used for i18n in the sun java > documentations http://java.sun.com/docs/books/tutorial/i18n/index.html > > Please note basically the MessageResources is a front end to this > allowing configuration of ressources in struts xml configuration file. > > Julian Tillmann a écrit : > > >Hi everyone, > > > >this question is not entirely a question about struts but just about a > part > >of it, which I would like to extract > >>from the rest of the framework. It's like this: > >I have my own framework for creating dynamic SVGs and in one Class I > >have tooltip-messages hardcoded in German. I don't want to destroy the > >structure of the method-calls > >and so I thought about Struts > >MessageResources where I can use different language packages in form > >of property files. So far so good, > >but I don't want to add the whole struts to my framework but just the > >MessageRessources-part and so my question is: > >can I just extract the MessageResources.class or is there substitution > >I can use for this? > > > >thanks very much in advance > >Julian > > > > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > -- "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
How to create a Waiting Page for long requests?
Hi I want to prevent a user from submitting long during database queries twice. Therefore I try to include a waiting page. Can someone name me an example or give me a tip how to implement it? Thanks a lot Julian -- "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: How to create a Waiting Page for long requests?
Hi again, thanks for the suggestions, but I'd rather not use JavaScript, so any advice besides that? ciao 4 now Julian > --- Ursprüngliche Nachricht --- > Von: "Shshank Jain" <[EMAIL PROTECTED]> > An: "Struts Users Mailing List" > Betreff: Re: How to create a Waiting Page for long requests? > Datum: Wed, 3 May 2006 12:34:08 +0530 > > Hii > > One way could be to dynamically create a full page size div and place it > over the whole page on the higher z-index this will disable the access > to the underlying buttons etc. If you have select list with submission on > onchange event then you may have to disable them manually using javascript > as browser places them on the highest z-index exposing them during the > request. > > - Shanky > > > On 5/3/06, Roy, Ansuman <[EMAIL PROTECTED]> wrote: > > > > when a user submits anything on the jsp page you can try and disable the > > submit button and display a message for please wait. > > all this can be achieved with the help of java script. > > regards, > > Roy > > > > -Original Message- > > From: Julian Tillmann [mailto:[EMAIL PROTECTED] > > Sent: Wednesday, May 03, 2006 11:44 AM > > To: [EMAIL PROTECTED]; user@struts.apache.org > > Subject: How to create a Waiting Page for long requests? > > > > > > Hi > > > > I want to prevent a user from submitting > > > > long during database queries twice. > > > > Therefore I try to include a waiting page. > > > > Can someone name me an example or give me > > > > a tip how to implement it? > > > > > > > > Thanks a lot > > Julian > > > > -- > > "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... > > Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > This e-mail and any attachment is for authorised use by the intended > > recipient(s) only. It may contain proprietary material, confidential > > information and/or be subject to legal privilege. It should not be > copied, > > disclosed to, retained or used by, any other party. If you are not an > > intended recipient then please promptly delete this e-mail and any > > attachment and all copies and inform the sender. Thank you. > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > -- GMX Produkte empfehlen und ganz einfach Geld verdienen! Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Finalize back hitting the "back"-button?
Hello my question is simple: is an action finalized when the user hits the "back" button of the browser? thanks & ciao 4 now Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Finalize back hitting the "back"-button?
Hi I'm sorry, I wasn't being specific, I meant a struts action. You see, we've got some actions which get data from a database and sometimes it takes a while, so some of the users hit the back button and I'd like to know whether this ends the connection by itself (if implemented so in finalize) or, as I'm guessing after your answer, how to do it otherwise. thanks again Julian > --- Ursprüngliche Nachricht --- > Von: "Emilia Ipate" <[EMAIL PROTECTED]> > An: "Struts Users Mailing List" > Betreff: RE: Finalize back hitting the "back"-button? > Datum: Wed, 17 May 2006 09:31:44 +0200 > > Hello! > > Could you be more explicit? What do you understand when saying action? Are > you referring to a HTTP request action? > > Anyway, you should remember that, when the user hits the "back" button of > the browser, there is no interaction (no request sent) between the client > (browser) and the server. So, when the "back" button of the browser is hit, > the browser retrieves from the user's PC cache the previous html page and > shows it again (so, it's just the old page, not a new request to server -- > but you can trick this). Because there is no request sent by the user to the > server, the session (if there is one) is not lost. > > I hope this clears your problem! If it doesn't, please explain what do you > mean by "action"! > > Kind regards, > Emilia > -- GMX Produkte empfehlen und ganz einfach Geld verdienen! Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
How to lock the access of methods within an action?
Hello everyone, Within our struts web application in which we have edit-actions within a user can be busy editing data in the form for several minutes. The problem is, if another user is also editing the data at the same time, one of the is eventually going to overwrite the changes of the other and the other will have worked completely in vain. So my question would be whether there's some way to prevent this from happening, some kind of "lock down" method for edit-actions? I think this problem is not uncommon, can someone give me a tip? thanks in advance Julian -- Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: How to lock the access of methods within an action?
Thanks a lot for your answer! My thinking behind is the application level! I’m not sure but the goal is (my hope..)to solve this problem using aspect oriented programming or Spring although I’m not very aware of it. For example it would be nice to have one central configuration there you can say: this method -max-users 1- rule: throw error …. Should be done then a second users wants access to the method. Can you help me? Thanks a lot! > Original-Nachricht > Datum: Tue, 30 May 2006 10:55:17 +0200 > Von: The Jasper <[EMAIL PROTECTED]> > An: Struts Users Mailing List > Betreff: Re: How to lock the access of methods within an action? > > Hi, > > this sounds like a common database problem. You might want to consider > some kind of pessimistic locking. Basically you lock the object when > you start editing and prevent all access to it for the duration of the > lock. You could also do an optimistic lock which means that when you > change an object it will only be committed if the object hasn't > changed between the time you got your lock and the time you want to > commit it. This doens't prevent you from having done unnecessary work > however. Most db's support optimistic locking, but not pessimistic > locking. > > If you want to use this at the application level you will have to do > it yourself. You could put a variable somewhere to track wether an > object is being edited and base access restrictions off of that. > However you have to be very carefull about making sure you don't get > any deadlock or race conditions. > > I suggest you delve into database world and read about how other > people have solved this problem. > > mvg, > Jasper > > On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > Hello everyone, > > > >>> Within our struts web application in which we have edit-actions within > a user can be busy editing data in the form for several minutes. > > > > The problem is, if another user is also editing the data at the same > time, one of the is eventually going to overwrite the changes of the other and > the other will have worked completely in vain. So my question would be > whether there's some way to prevent this from happening, some kind of "lock > down" method for edit-actions? I think this problem is not uncommon, can > someone give me a tip? > > > >>> thanks in advance > > Julian > > > > -- > > > >> Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! > > Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer > > > >> - > > 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] -- Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Re: How to lock the access of methods within an action?
thx hmm, where can I find it, is it part of Spring? > Original-Nachricht > Datum: Tue, 30 May 2006 18:36:06 +0800 > Von: Lixin Chu <[EMAIL PROTECTED]> > An: Struts Users Mailing List > Betreff: Re: Re: How to lock the access of methods within an action? > > i think transaction manager will take care of this. > > On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > > > Thanks a lot for your answer! > > > > My thinking behind is the application level! > > > > I'm not sure but the goal is (my hope..)to solve > > > > this problem using aspect oriented programming or Spring > > > > although I'm not very aware of it. > > > > For example it would be nice to have one central configuration there you > > > > can say: > > > > this method -max-users 1- > > > > rule: throw error …. > > > > Should be done then a second users wants access to the method. > > > > Can you help me? > > > > Thanks a lot! > > > >> > Original-Nachricht > > >Datum: Tue, 30 May 2006 10:55:17 +0200 > > >Von: The Jasper <[EMAIL PROTECTED]> > > >An: Struts Users Mailing List > > >Betreff: Re: How to lock the access of methods within an action? > > > > Hi, > > > > > > this sounds like a common database problem. You might want to consider > > > some kind of pessimistic locking. Basically you lock the object when > > > you start editing and prevent all access to it for the duration of the > > > lock. You could also do an optimistic lock which means that when you > > > change an object it will only be committed if the object hasn't > > > changed between the time you got your lock and the time you want to > > > commit it. This doens't prevent you from having done unnecessary work > > > however. Most db's support optimistic locking, but not pessimistic > > > locking. > > > > > > If you want to use this at the application level you will have to do > > > it yourself. You could put a variable somewhere to track wether an > > > object is being edited and base access restrictions off of that. > > > However you have to be very carefull about making sure you don't get > > > any deadlock or race conditions. > > > > > > I suggest you delve into database world and read about how other > > > people have solved this problem. > > > > > > mvg, > > > Jasper > > > > > > On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > > > Hello everyone, > > > > > > > >>> Within our struts web application in which we have edit-actions > > within > > > a user can be busy editing data in the form for several minutes. > > > > > > > > The problem is, if another user is also editing the data at the same > > > time, one of the is eventually going to overwrite the changes of the > > other and > > > the other will have worked completely in vain. So my question would be > > > whether there's some way to prevent this from happening, some kind of > > "lock > > > down" method for edit-actions? I think this problem is not uncommon, > can > > > someone give me a tip? > > > > > > > >>> thanks in advance > > > > Julian > > > > > > > > -- > > > > > > > >> Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! > > > > Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer > > > > > > > >> > - > > > > 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] > > > > -- > > > >> Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! > > Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer > > > >> - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > -- Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer! Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Re: Re: How to lock the access of methods within an action?
Hi Miguel,
thanks for the tip, is it possible to use this in a struts action which is not
thread save?
ciao 4 now
Julian
> Original-Nachricht
> Datum: Tue, 30 May 2006 09:28:36 -0300
> Von: Miguel Galves <[EMAIL PROTECTED]>
> An: Struts Users Mailing List
> Betreff: Re: Re: Re: How to lock the access of methods within an action?
>
> Julian,
>
> you can use the lock provided by Java 1.5 API...they are very simple to
> use.
> For istance, I use java.util.concurrent.Semaphore.
> The code above sho how to use it:
> private Semaphore sceneryLock = new Semaphore(1, true);
>
> public void removeScenery() throws Exception {
>
> try {
> sceneryLock.acquire();
>
> do your critical stuff here ...
> } catch (InterruptedException e) {
>
> } finally {
> sceneryLock.release();
> }
> }
>
> Hope it helps ...
>
> []s
>
> Miguel
>
> On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote:
> >
> > thx
> >
> > hmm, where can I find it, is it part of Spring?
> >
> > > Original-Nachricht
> > >Datum: Tue, 30 May 2006 18:36:06 +0800
> > >Von: Lixin Chu <[EMAIL PROTECTED]>
> > >An: Struts Users Mailing List
> > >Betreff: Re: Re: How to lock the access of methods within an action?
> > >
> i think transaction manager will take care of this.
> > >
> > > On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote:
> > > >
> > > > Thanks a lot for your answer!
> > > >
> > > > My thinking behind is the application level!
> > > >
> > > > I'm not sure but the goal is (my hope..)to solve
> > > >
> > > > this problem using aspect oriented programming or Spring
> > > >
> > > > although I'm not very aware of it.
> > > >
> > > > For example it would be nice to have one central configuration there
> > you
> > > >
> > > > can say:
> > > >
> > > > this method -max-users 1-
> > > >
> > > > rule: throw error ….
> > > >
> > > > Should be done then a second users wants access to the method.
> > > >
> > > > Can you help me?
> > > >
> > > > Thanks a lot!
> > > >
> > > >> > Original-Nachricht
> > > > >Datum: Tue, 30 May 2006 10:55:17 +0200
> > > > >Von: The Jasper <[EMAIL PROTECTED]>
> > > > >An: Struts Users Mailing List
> > > > >Betreff: Re: How to lock the access of methods within an action?
> > > > >
> Hi,
> > > > >
> > > > > this sounds like a common database problem. You might want to
> > consider
> > > > > some kind of pessimistic locking. Basically you lock the object
> when
> > > > > you start editing and prevent all access to it for the duration of
> > the
> > > > > lock. You could also do an optimistic lock which means that when
> you
> > > > > change an object it will only be committed if the object hasn't
> > > > > changed between the time you got your lock and the time you want
> to
> > > > > commit it. This doens't prevent you from having done unnecessary
> > work
> > > > > however. Most db's support optimistic locking, but not pessimistic
> > > > > locking.
> > > > >
> > > > > If you want to use this at the application level you will have to
> do
> > > > > it yourself. You could put a variable somewhere to track wether an
> > > > > object is being edited and base access restrictions off of that.
> > > > > However you have to be very carefull about making sure you don't
> get
> > > > > any deadlock or race conditions.
> > > > >
> > > > > I suggest you delve into database world and read about how other
> > > > > people have solved this problem.
> > > > >
> > > > > mvg,
> > > > > Jasper
> > > > >
> > > > > On 5/30/06, Julian Tillmann <[EMAIL PROTECTED]> wrote:
> > > > > > Hello everyone,
> > > > > >
> > > > > >>> Within our struts web application in which we have
> edit-actions
> > > > within
> > > > > a user can be busy editing data in the form for several minu
Form shared between 2 Action, how to change bool-value?
Hello,
I've two actions which share the same form in with session scope.
In the first action one boolean value of the form will be set to false,
but in the next action the form will be retireved an the value is still true.
There is the error?
I tried (int Action 1):
form.setValue(false);
and I also implemented the reset method
with reset(...)
{
boolean value = false;
}
both doesn't work so what is the common way to achieve this?
Or may this be correct and the error should be found somewhere else?
thanks
Julian
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Extending Struts with Spring
Hello, I've read that you can use Spring to make your Struts Actions thread safe. Is someone using this or has experience with it? Are there other arguments for using Spring with Struts like, for example an easy implemented Interceptor that might improve the application and is not as easily achieved with a filter? I'm thinking about using this extension but I don't have any kind of practical experience with it. Could someone help me with this? ciao & thx Julian -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Extending Struts with Spring
Thank you for your replies! When I understand this right: - Giving Actions a state using Spring makes no sence - It cannot be recommended to overwrite the request processor with Spring (we already have our own) - But the spring Context offers some new possibilites like IOC but to be honest I'm not expert enough to understand this up to date! Thanks I watched this example of IBM with the interceptor. Which other business-cases (aspects) could you reasonable use this way? Isn't this a performance problem, because interceptors always have to use refelection? Thank you! Julian -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Extending Struts with Spring
Thanks very much for all your answers, I'd be very keen to learn more about this soon. -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Starting a Struts-Intranet Applikation from the Client
Hello everyone, I was wondering whether it's possible to start a Struts application from a Client Progam made with Visual Basic , with a Link and how you could pass parameters via this link that are availible in the web-applikation. Has anybody done this before, can you give me some advice on this subject? thank you very much Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*! "Feel free" mit GMX DSL! http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Using the c-tag with Struts?!
Hi I’d like to use the c-tag of the core tag library as it seems to be powerful. For example "else if" is not implemented in Struts-logic and this is often needed. Are there any disadvantages of doing so or can also you recommend it? Thanks for your suggestions! Julian -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Using the c-tag with Struts?!
thanks for the good information :) Julian Original-Nachricht Datum: Wed, 5 Jul 2006 06:55:33 -0700 Von: Wendy Smoak <[EMAIL PROTECTED]> An: Struts Users Mailing List Betreff: Re: Using the c-tag with Struts?! > On 7/5/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > > I'd like to use the > > c-tag of the core tag library as it seems > > to be powerful. > > For example "else if" is not implemented in > > Struts-logic and this is often needed. > > Are there any disadvantages of doing so > > or can also you recommend it? > > No disadvantages, in fact the documentation recommends using JSTL > instead of the Struts tags whenever possible. > > If you're on Servlet 2.3, use the 'Struts EL' taglib with JSTL 1.0. > For Servlet 2.4, configure web.xml to use the 2.4 schema and use the > normal Struts tags with JSTL 1.1. > > * http://wiki.wsmoak.net/cgi-bin/wiki.pl?StrutsAndJSTL > > -- > Wendy > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Short Validation Pattern Question
Hi I hava two fields where a user should enter a time between 00:00 and 23:59. Is it right that HH:mm is the right pattern to check this? Thanks a lot Julian -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Performance Tests on Action Level
Hi everybody, we need a performance test on the actions level in our rather big Struts Application which contains many database queries. for example to find out which Action takes the longest or which actions might cause a high CPU usage .. Is there a tool how to implement it? Or is it possible via filter? The problem is that there's a constant, high CPU usage on our Tomcat and we'd like to find out why. I’m sure that it’s because of the struts-application. thanks very much Julian -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Re: Performance Tests on Action Level
HI! Thank you for your link! I tried to deploy the war-file on tomcat 4 and tomcat 5 but always get the same exception "major-minor version". Does it require JDK 1.5? I hope not because I would be very interested in this tool! Thanks Julian Original-Nachricht Datum: Tue, 11 Jul 2006 13:21:59 +0200 Von: Leon Rosenberg <[EMAIL PROTECTED]> An: Struts Users Mailing List Betreff: Re: Performance Tests on Action Level > http://moskito.anotheria.net is probably what you want. > > try > http://moskito.anotheria.net/moskitodemo/mui/mskShowAllProducers > > The project is (yet) rather bad documented (working on it) so ask me > directly if you have any questions :-) > > regards > Leon > > On 7/11/06, Julian Tillmann <[EMAIL PROTECTED]> wrote: > > Hi everybody, > > > > we need a performance test on the actions level in our rather big Struts > Application which contains many database queries. for example to find out > which Action takes the longest or which actions might cause a high CPU > usage .. > > Is there a tool how to implement it? Or is it possible via filter? > > The problem is that there's a constant, high CPU usage on our Tomcat and > we'd like to find out why. > > I'm sure that it's because of the struts-application. > > > > thanks very much > > Julian > > > > > > > > -- > > > > > > Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! > > Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer > > > > - > > 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] -- "Feel free" – 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Comparing beans
Hi everyone, does someone know of a good way to check a java bean whether a certain value has already been added or not? thanks Julian -- Echte DSL-Flatrate dauerhaft für 0,- Euro*. Nur noch kurze Zeit! "Feel free" mit GMX DSL: http://www.gmx.net/de/go/dsl - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
