Where should I store my static content in a clustered environment
Hi, lets start with describing my current task where I would appreciate any advice from you. I have to construct a clustered system (with lots of webservers) that has few dynamic pages but a lot of static ones, whereby all resources have to be protected by security-constraints of a webapp (so letting Apache deliver this content won't work). Moreover there should be the possibility to upload/delete static components via a web form. My main problem is now where should I store the static data (mainly html pages, images, ...; but over 4 GB(!) large in total)? As far as now I'm considering the following solutions: 1.) Storing the content within the webapp of each webserver. This would include that the servers know each other as the upload/delete operations must be propagated from one server to all the others. Moreover the update of the dynamic parts would not be as easy any more as just uploading a new war-file as this requires deleting the old webapp directory (that contains the content is this case as well). 2.) Storing the content in a separate directory but still on each webserver. This would still include that servers must know each other, but updating the dynamic part would be easier. The downside is that I would have to write a servlet that delivers all static content with all the problems of mime-types, character encoding and so on which I would have to handle myself. 3.) Storing the content in a database on a separate server. The advantage would be that webservers only need to know their database server and updating the webapps would be easy (just uploading new war-files). The downside here is that I need a servlet too and I think it's maybe not the fastest solution as all requests of all servers to each single chuck of static content would require a connection to the database server. 4.) As 3.) but storing data on a single separate server in the filesystem. The advantages/disadvantages should be similar to 3.) whereby I do not know which solution might be faster. 5.) As 3.)/4.) but additionally implementing a caching-mechanism on the webservers. This means if a webserver gets a request for a specific page for the first time he connects the database server to retrieve that page, then stores it in its webapp directory and then let tomcat deliver that page. On the second request it is just checked if that page is already there and if so it is delivered directly. Of course I must implement some mechanism such that the webservers get to know if their cached data is outdated but so far this seems to me the best solution. Anyone ever faced this kind of problem? Any kind of remark to my possible solutions or any other possibilities you might know of are appreciated. Thanks you in advance for your help. Bjoern - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: suppress tomcat version numbers
Hi Charles, This seems to be a new option for TC 5.5. Do you know of anything similar for 5.0? Thanks Andrew On Nov 22, 2005, at 4:52 PM, Caldarale, Charles R wrote: From: Kiarna Boyd [mailto:[EMAIL PROTECTED] Subject: suppress tomcat version numbers Hi I'm trying to suppress the version number Tomcat gives in its headers. Read the doc on the Connector tag. You're looking for the server attribute (the description mentions something about being paranoid :-). - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Vedr.: Where should I store my static content in a clustered environment
Hi Eickvonder, I would definitely go for solution 5, which resembles an assigment we were given in a course in Distributed Computing. If possible go for active replication to distribute the load on several database servers. To implement this you must implement a common frontend (FE) communicating with the replica managers (RM). A read operation simply connects to the FE which (using round-robin or similar) connects to a database server. If youre not worried about byzantine errors simply fetch the first file being returned. A write operation connects to the FE which updates all database servers. If you settle for this solution but something seems a bit unclear I recommend reading up upon distributed computing terms (e.g. Distributed Systems: Concepts and Design, G. Coulouris, J. Dollimore, T. Kindberg, Addison-Wesley, 4rd edition, 2005, ISBN 0321263545) As far as invalidation goes you can basically choose timestamp cache invalidation or callback cache invalidation. Timestamp cache invalidation will upon each read request read the last time the file was updated and if e.g. 5 minutes has passed read a new file from the database. This is rather simple but does not ensure consistency. Further if the html files really are static and not changed very often you will probably choose long timeouts to minimize the number of irrelevant reads thus prolonging the time the webservers are out of sync after an update has been comitted. If possible memorywise save the state (fileId as int, time as long) in a hashmap or similar on the webservers to avoid having to read from disk before determining whether to fetch from the database. Callback cache invalidation is better at acheiving consistency and minimizes reads from the database. The FE/RM should know which webservers has requested which files and send an invalidate to the those webservers when a client commits an update (thus ensuring webservers which have read the file will read it again once it is requested from a client). Also if possible here memorywise save the state (webserverId as int, fileId as int, time as long) in a hashmap or similar on the webservers to avoid having to read from disk before determining which webservers to invalidate. Good luck, Thomas Eickvonder Bjoern [EMAIL PROTECTED] 23-11-2005 10:23 Besvar venligst til Tomcat Users List Til:users@tomcat.apache.org cc: Vedr.: Where should I store my static content in a clustered environment Hi, lets start with describing my current task where I would appreciate any advice from you. I have to construct a clustered system (with lots of webservers) that has few dynamic pages but a lot of static ones, whereby all resources have to be protected by security-constraints of a webapp (so letting Apache deliver this content won't work). Moreover there should be the possibility to upload/delete static components via a web form. My main problem is now where should I store the static data (mainly html pages, images, ...; but over 4 GB(!) large in total)? As far as now I'm considering the following solutions: 1.) Storing the content within the webapp of each webserver. This would include that the servers know each other as the upload/delete operations must be propagated from one server to all the others. Moreover the update of the dynamic parts would not be as easy any more as just uploading a new war-file as this requires deleting the old webapp directory (that contains the content is this case as well). 2.) Storing the content in a separate directory but still on each webserver. This would still include that servers must know each other, but updating the dynamic part would be easier. The downside is that I would have to write a servlet that delivers all static content with all the problems of mime-types, character encoding and so on which I would have to handle myself. 3.) Storing the content in a database on a separate server. The advantage would be that webservers only need to know their database server and updating the webapps would be easy (just uploading new war-files). The downside here is that I need a servlet too and I think it's maybe not the fastest solution as all requests of all servers to each single chuck of static content would require a connection to the database server. 4.) As 3.) but storing data on a single separate server in the filesystem. The advantages/disadvantages should be similar to 3.) whereby I do not know which solution might be faster. 5.) As 3.)/4.) but additionally implementing a caching-mechanism on the webservers. This means if a webserver gets a request for a specific page for the first time he connects the database server to retrieve that page, then stores it in its webapp directory and then let tomcat deliver that page. On the second request it is just checked if that page is already there and if so it is delivered directly. Of course I must implement some mechanism such that the webservers get
AW: JSTL
Hi, JSTL is not a part of J2EE 1.4, you need to install it separatly. But it will be a part of JEE5. Cheers Bernhard -Ursprüngliche Nachricht- Von: Behrang Saeedzadeh [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 23. November 2005 03:04 An: Tomcat Users List Betreff: JSTL Hi, Isn't JSTL a standard part of the J2EE 1.4 Web containers? Shouldn't it be available to Web apps out of the box with no need to include the JAR files in the WEB-INF/lib and referencing to their tlds in the web.xml? Thanks in advance, Behi -- Science is a differential equation. Religion is a boundary limit - Alan Turing Behrang Saeedzadeh http://www.jroller.com/page/behrangsa http://my.opera.com/behrangsa - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: JSTL
Hi Bernhard, Thanks for the explanation. Regards, Behi On 11/23/05, Bernhard Slominski [EMAIL PROTECTED] wrote: Hi, JSTL is not a part of J2EE 1.4, you need to install it separatly. But it will be a part of JEE5. Cheers Bernhard -Ursprüngliche Nachricht- Von: Behrang Saeedzadeh [mailto:[EMAIL PROTECTED] Gesendet: Mittwoch, 23. November 2005 03:04 An: Tomcat Users List Betreff: JSTL Hi, Isn't JSTL a standard part of the J2EE 1.4 Web containers? Shouldn't it be available to Web apps out of the box with no need to include the JAR files in the WEB-INF/lib and referencing to their tlds in the web.xml? Thanks in advance, Behi -- Science is a differential equation. Religion is a boundary limit - Alan Turing Behrang Saeedzadeh http://www.jroller.com/page/behrangsa http://my.opera.com/behrangsa - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Science is a differential equation. Religion is a boundary limit - Alan Turing Behrang Saeedzadeh http://www.jroller.com/page/behrangsa http://my.opera.com/behrangsa
TC 5.0.28, JK1, CAS-SERVER, SSL sleep less nights please mayday!
hi everyone, this is what i have : - TC 5.0.28 http://bigleo.dyndns.org/tc/server.xml.log - Apache with JK modules SSL enabled http://bigleo.dyndns.org/tc/mod_jk.conf.log - CAS SERVER 3.0 for those who dont know what cas is ( its a Central Authentication Server based on Tomcat filter) - i have a test application (jsp-examples) the one from Tomcat where i applied the CAS Filter http://bigleo.dyndns.org/tc/jsp-examples.web.xml.log this is what i want to do: is to be able to authenthicate a user once grat access everywhere this is my problem: if you go on 1 ] http://bigleo.dyndns.org/jsp-examples you will be redirected to the the (an SSL connection will be established) 2 ] http://bigleo.dyndns.org/cas/login you can authenticates with username=password example yel/yel so you will recieve a ticket and then you will be redirected to the origin where you comes from [1] and now you should have a ticket wich should grants you access to the jsp-examples but here we go a problem occure whith tomcat internally wihc drops this exception : from the context log http://bigleo.dyndns.org/tc/exception.log now i really spent more than 12 days trrying to debug this and im really helpless i just can not see a clue what the problem could be and ill be glad fro any questions or suggestions or even critics i hope i provieded enough informations Greeting from Cologne and Thanks in Advance Yassine YEL first i get an exception when the user authenticates i - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
admin module for Tomcat 5
Hello, I am running Tomcat 5, and I have been having troubles configuring a web-app in a virtual environment. Anyway, I see there is an admin module, and I believe it may assist in this. I downloaded the admin module for Tomcat 5, but do not know where or how to install it. I tried unzipping it under webapps/ROOT but that did not do the trick. I googled for info, but it appears to be slim. Anyone? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: admin module for Tomcat 5
From: Scott Purcell [mailto:[EMAIL PROTECTED] Subject: admin module for Tomcat 5 I downloaded the admin module for Tomcat 5, but do not know where or how to install it. Unzip the download into the same location as your main Tomcat download. Note that the paths in the .zip file match up with those of your Tomcat installation. - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: suppress tomcat version numbers
From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Re: suppress tomcat version numbers This seems to be a new option for TC 5.5. Do you know of anything similar for 5.0? Sorry, I don't - haven't used 5.0 for a long time, since the performance of 5.5 is noticeably better. - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: admin module for Tomcat 5
XP Scott K Purcell | Developer | VERTIS | 555 Washington Ave. 4th Floor | St. Louis, MO 63101 | 314.588.0720 Ext:1320 | [EMAIL PROTECTED] | http://www.vertisinc.com Vertis is the premier provider of targeted advertising, media, and marketing services that drive consumers to marketers more effectively. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 23, 2005 9:09 AM To: Tomcat Users List Subject: Re: admin module for Tomcat 5 What operating system are you using? From: Scott Purcell [EMAIL PROTECTED] Date: 2005/11/23 Wed AM 09:17:01 EST To: users@tomcat.apache.org Subject: admin module for Tomcat 5 Hello, I am running Tomcat 5, and I have been having troubles configuring a web-app in a virtual environment. Anyway, I see there is an admin module, and I believe it may assist in this. I downloaded the admin module for Tomcat 5, but do not know where or how to install it. I tried unzipping it under webapps/ROOT but that did not do the trick. I googled for info, but it appears to be slim. Anyone? - 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: RE: admin module for Tomcat 5
Ah. Unzip it into the same folder into which you've installed Tomcat. You'll need to edit Tomcat-Users.xml in the conf folder to include a user with the admin role to access the app. Restart Tomcat and it should work. From: Scott Purcell [EMAIL PROTECTED] Date: 2005/11/23 Wed AM 10:16:46 EST To: Tomcat Users List users@tomcat.apache.org Subject: RE: admin module for Tomcat 5 XP Scott K Purcell | Developer | VERTIS | 555 Washington Ave. 4th Floor | St. Louis, MO 63101 | 314.588.0720 Ext:1320 | [EMAIL PROTECTED] | http://www.vertisinc.com Vertis is the premier provider of targeted advertising, media, and marketing services that drive consumers to marketers more effectively. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 23, 2005 9:09 AM To: Tomcat Users List Subject: Re: admin module for Tomcat 5 What operating system are you using? From: Scott Purcell [EMAIL PROTECTED] Date: 2005/11/23 Wed AM 09:17:01 EST To: users@tomcat.apache.org Subject: admin module for Tomcat 5 Hello, I am running Tomcat 5, and I have been having troubles configuring a web-app in a virtual environment. Anyway, I see there is an admin module, and I believe it may assist in this. I downloaded the admin module for Tomcat 5, but do not know where or how to install it. I tried unzipping it under webapps/ROOT but that did not do the trick. I googled for info, but it appears to be slim. Anyone? - 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Content is not allowed in prolog Tomcat-XmlRpc
Hi all, I'm using Tomcat 5.0, and I'm having a very strange problem. Sometimes, when a client sends several continuous http requests to the server, it receives http headers when it should only be the body. If in method doPost()I call request.getInputStream, I can see header lines. I'm using Apache XmlRpc, so the body is a xml document, when I try to parse this body, I get a Content is not allowed in prolog error, because the parser finds this header lines in the body (document to be parsed). It's very strange, we only get this error when we use a xmlrpc client written in C and using xmlrpc-c and libwww. Has anybody ever seen a similar problem. Any kind of help would be very appreciated. Thanks a lot - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: suppress tomcat version numbers
From: Caldarale, Charles R [EMAIL PROTECTED] Date: November 22, 2005 10:52:49 AM EST To: Tomcat Users List users@tomcat.apache.org Subject: RE: suppress tomcat version numbers From: Kiarna Boyd [mailto:[EMAIL PROTECTED] Subject: suppress tomcat version numbers Hi I'm trying to suppress the version number Tomcat gives in its headers. Read the doc on the Connector tag. You're looking for the server attribute (the description mentions something about being paranoid :-). - Chuck Hi Chuck I looked through the docs and it seems to only be an option for 5.5 tomcat, not for the 5.0 or the 4.0. http://tomcat.apache.org/tomcat-5.5-doc/config/http.html Any other ideas on how to pass that header variable? Thanks! -Kiarna
Connection refused when attempt to contact myUsename.myDns.com:8080
I want to use Tomcat with its own HTTP web server without having to use it with Apache HTTP web server but I run into a problem when accessing Tomcat from outside. Everything works just fine as long as I am using web browser from my local machine via http://localhost:8080, but I get Connection refused error message if I try from any other machine on the internet (from the computer at my work) via DNS name http://dcausevic.homelinux.com:8080 By the way everything is okay with my DNS name since I am able to access everything served by Apache HTTP via http://dcausevic.homelinux.com (using default port 80), but Tomcat is not reachable thru the same DNS and different port (I configured server.xml to use 8080 port). Everything works fine accessing from http://localhost:8080 locally but http://dcausevic.homelinux.com:8080 would not work from outside? How do I check if Tomcat is actually listening on port 8080 from outside? To me it looks like it is not listening to outside requests... Please someone help me figure out what is happening here. Thanks Dzenan Causevic Software Developer NaviSite, Inc Syracuse, NY - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Connection refused when attempt to contact myUsename.myDns.com:8080
From: dcausevi [mailto:[EMAIL PROTECTED] Subject: Connection refused when attempt to contact myUsename.myDns.com:8080 Everything works fine accessing from http://localhost:8080 locally but http://dcausevic.homelinux.com:8080 would not work from outside? Sounds like some sort of firewall issue, somewhere between outside and your homelinux.com site. How do I check if Tomcat is actually listening on port 8080 from outside? You didn't say what OS you're using, but nearly all of them these days have a netstat program. However, that won't tell you if there's a firewall in the way, since it's reporting from the inside. - 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
ordering apps startups
Hi Folks. Is it possible to order apps startups. For example. I have app1, app2 and app3. I need that app3 starts up first of all. and app2 in second and so on. Is it possible ? Thanks in advance. Rogerio. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.4/175 - Release Date: 18/11/2005
Re: Starting the apache tomcat 4.05 servlet engine on windows xp
Try the binary distribution instead of the source bundle: http://archive.apache.org/dist/tomcat/tomcat-4/archive/v4.0.5/bin/ Either jakarta-tomcat-4.0.5.zip or jakarta-tomcat-4.0.5.exe should be fine. CATALINA_HOME will probably then be: C:\tomcat\jakarta-tomcat-4.0.5 HTH, Jon Aaron Bortman wrote: Hello, In my job I recently have been assigned to work with Cocoon. In order to be able to use cocoon I need to be able to deploy it on a servlet engine. The book I am reading to learn Cocoon has chosen tomcat 4.0.5 as the servlet engine to use. I am having a problem getting tomcat to start. Any help that could be given would be much appreciated. So far I have: 1) Installed the java sdk 1.4.1_07 and set the environment variable JAVA_HOME to its location 2) Copied the jakarta-tomcat-4.0.5-src.zip to a file on my computer (running Windows XP professional) 3) Extracted the zip file 4) Brought up a command prompt and set the environment variable CATALINA_HOME like this: set CATALINA_HOME=C:\tomcat\jakarta-tomcat-4.0.5-src\catalina\src 5) Navigated to the CATALINA_HOME directory and run the startup script. 6) When I run the script I get the following echoed to the screen. Using CATALINA_BASE: C:\tomcat\jakarta-tomcat-4.0.5-src\catalina\src Using CATALINA_HOME: C:\tomcat\jakarta-tomcat-4.0.5-src\catalina\src Using CATALINA_TMPDIR: C:\tomcat\jakarta-tomcat-4.0.5-src\catalina\src\temp Using JAVA_HOME: c:\tools\j2sdk1.4.1_07 7) I have been unable to get the welcome page to display when I point a browser at http://localhost:8080. I have looked at the FAQ's and tried changing the port 8080 to something else, but that did not fix my problem. I also have checked and am not behind a proxy. I am not sure what I am doing wrong, but I have been searching the help pages for Apache and other sites with little luck. If you could help me look in the right place I would be greatful. Thanks for your time, Aaron - 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: ordering apps startups
This one has been addressed several times before. The short answer is NO. Tomcat being multithreaded does not guarantee order of start or access of a page. It would be better to change your apps so that they are not dependent on each other's state or order of starting. Think more in terms of event driven application development rather than developing a single user GUI. Robert S. Harper Information Access Technology, Inc. -Original Message- From: Rogerio Baldini das Neves [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 23, 2005 10:36 AM To: users@tomcat.apache.org Subject: ordering apps startups Hi Folks. Is it possible to order apps startups. For example. I have app1, app2 and app3. I need that app3 starts up first of all. and app2 in second and so on. Is it possible ? Thanks in advance. Rogerio. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.13.4/175 - Release Date: 18/11/2005 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
How to integrate tomcate 5, apache 2 using jk1.2 for Win32
Can anybody refer me to the HOW TO instructions to integrate Tomcat 5, Apache 2 using jk1.2 for Windows environment? thanks
RE: Where should I store my static content in a clustered environment
A simple solution would be to have all static pages hosted on an Apache httpd server in front of tomcat clusters. If you need more performance, just cluster the httpds. Tomcat is not really designed to server static pages. Apache httpd can also serve as a LB. In this case, certainly you have to treat static pages separately from dynamic webapps. In other words, you can't bundle static pages with your war files. ND -Original Message- From: Eickvonder Bjoern [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 23, 2005 4:23 AM To: users@tomcat.apache.org Subject: Where should I store my static content in a clustered environment Hi, lets start with describing my current task where I would appreciate any advice from you. I have to construct a clustered system (with lots of webservers) that has few dynamic pages but a lot of static ones, whereby all resources have to be protected by security-constraints of a webapp (so letting Apache deliver this content won't work). Moreover there should be the possibility to upload/delete static components via a web form. My main problem is now where should I store the static data (mainly html pages, images, ...; but over 4 GB(!) large in total)? As far as now I'm considering the following solutions: 1.) Storing the content within the webapp of each webserver. This would include that the servers know each other as the upload/delete operations must be propagated from one server to all the others. Moreover the update of the dynamic parts would not be as easy any more as just uploading a new war-file as this requires deleting the old webapp directory (that contains the content is this case as well). 2.) Storing the content in a separate directory but still on each webserver. This would still include that servers must know each other, but updating the dynamic part would be easier. The downside is that I would have to write a servlet that delivers all static content with all the problems of mime-types, character encoding and so on which I would have to handle myself. 3.) Storing the content in a database on a separate server. The advantage would be that webservers only need to know their database server and updating the webapps would be easy (just uploading new war-files). The downside here is that I need a servlet too and I think it's maybe not the fastest solution as all requests of all servers to each single chuck of static content would require a connection to the database server. 4.) As 3.) but storing data on a single separate server in the filesystem. The advantages/disadvantages should be similar to 3.) whereby I do not know which solution might be faster. 5.) As 3.)/4.) but additionally implementing a caching-mechanism on the webservers. This means if a webserver gets a request for a specific page for the first time he connects the database server to retrieve that page, then stores it in its webapp directory and then let tomcat deliver that page. On the second request it is just checked if that page is already there and if so it is delivered directly. Of course I must implement some mechanism such that the webservers get to know if their cached data is outdated but so far this seems to me the best solution. Anyone ever faced this kind of problem? Any kind of remark to my possible solutions or any other possibilities you might know of are appreciated. Thanks you in advance for your help. Bjoern - 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: ordering apps startups
Rogerio Baldini das Neves wrote: I need that app3 starts up first of all. and app2 in second and so on. As several folks have said: no. I'm currently exploring a notion of extending StandardHost and subclassing the addChild(), etc., behavior to keep the children in a list rather than a hashmap, to make the order of webapp startup and shutdown more predictable. It's meant for use in a specific environment of ours where we don't auto-deploy apps on the fly, and depend on the startup and shutdown order. I'll post something here if I'm successful, just for the record.. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Displaying PDF's within a servlet
Hello all, I am doing a project where I need to display several hundred pdf's one at a time on my website. However, starting Acrobat for this purpose everytime could be rather slow and inconvenient. My professor mentioned that in php, there is an easy way to convery pdf to png's, but I would like to stick with servlets. Is there any way that I can convert a pdf document into some kind of an image file before displaying it? Any guidance would be deeply appreciated. Best Regards, Khawaja Shams
JAASRealm-based Login Fails After Upgrade from 5.0 to 5.5
I have a stable, working, Struts-based web application running under Tomcat 5.0.28 that uses HTTP BASIC authentication and a JAASRealm (with a home grown LoginModule and user and role principals) over SSL. The authentication / security has been working with no issues for several releases. I am now trying to upgrade Tomcat from 5.0.28 to 5.5.12. I've rebuilt the web application using JDK 1.5.0_05. I've followed the usual procedure for installing and configuring Tomcat, including modifying server.xml to remove the deprecated references to Logger. My web application appears to start with no problems according to the various log files. I then browse to it. I receive the SSL certificate as usual and the browser requests that I login in (via its pop-up box) - again as usual. I do so. According to my web application logs, the correct LoginModule is activated and I login successfully and the appropriate roles are assigned to the user. However, rather than taking me to the home page of the web application I am redirected to the 403 (permission denied) error page - which displays with the correct images and style sheet. I've search the FAQ, bug lists, mailing lists and the web, but have been unable to find any directly relevant help. Any thoughts? In particular has this area of Tomcat changed? My understanding is that the servlet and JSP specs are the same for Tomcat 5.0 and 5.5, so I should expect the same behaviour. Relevant snippets from server.xml and web.xml are below. Thanks, David Snippet of server.xml !-- Define the top level container in our container hierarchy -- Engine name=Catalina defaultHost=localhost debug=1 Host name=localhost debug=1 appBase=webapps unpackWARs=false autoDeploy=false xmlValidation=false xmlNamespaceAware=false !-- Our auth mechanism -- Realm className=org.apache.catalina.realm.JAASRealm appName=SSGSP userClassNames=com.avaya.common.auth.UserPrincipal roleClassNames=com.avaya.common.auth.RolePrincipal debug=1/ Context className=org.apache.catalina.core.StandardContext allowLinking=false cachingAllowed=true charsetMapperClass=org.apache.catalina.util.CharsetMapper cookies=true crossContext=false debug=99 displayName=Product X Web Application docBase=../../../Webapps/Collector mapperClass=org.apache.catalina.core.StandardContextMapper path=/ssg privileged=false reloadable=false swallowOutput=true useNaming=true wrapperClass=org.apache.catalina.core.StandardWrapper !-- Turn off session caching in the manager -- Manager className=org.apache.catalina.session.StandardManager pathname=/ ... /Engine End snippet from server.xml Snippet from web.xml error-page error-code403/error-code location/WEB-INF/webpages/error/403.jsp/location /error-page security-constraint web-resource-collection web-resource-namehome/web-resource-name url-pattern/login/*/url-pattern url-pattern/admin/summary.do/url-pattern url-pattern/webpages/error.jsp/url-pattern url-pattern/webpages/index.jsp/url-pattern /web-resource-collection auth-constraint role-nameadminRole/role-name role-namedeviceAdminRole/role-name role-namecustomerAdminRole/role-name /auth-constraint user-data-constraint transport-guaranteeCONFIDENTIAL/transport-guarantee /user-data-constraint /security-constraint security-constraint web-resource-collection web-resource-nameadmin/web-resource-name url-pattern/admin/*/url-pattern url-pattern/feature/*/url-pattern /web-resource-collection auth-constraint role-nameadminRole/role-name role-namecustomerAdminRole/role-name /auth-constraint user-data-constraint transport-guaranteeCONFIDENTIAL/transport-guarantee /user-data-constraint /security-constraint login-config auth-methodBASIC/auth-method realm-nameSSGSP/realm-name /login-config security-role descriptionThe admin pages/description role-nameadminRole/role-name /security-role security-role descriptionThe device admin pages/description role-namedeviceAdminRole/role-name /security-role security-role descriptionCustomer role/description role-namecustomerAdminRole/role-name
Re: Net Disk Failure in JSP with Tomcat 5.5.9( or 5.5.X)
Hi,Chuck Would you please give me some idea for the following ! NanFei Hi, The following seem simple question get no any response yet ! Is it really no solution ? I made a Net Disk named P:\ The file ' test.jsp ' as following: - %@ page import=java.io.File % % String net = P:\\; java.io.File netDir=new java.io.File(net); out.print(net+ exist = +netDir.exists()+br); out.print(net+ is Directory = +netDir.isDirectory()+br); % - I got the following result when I use Apache Tomcat 5.5.9( or 5.5.X) Server : P:\ exist = false P:\ is Directory = false * But I got the following when I use Tomcat 5.0.18 : `` P:\ exist = true P:\ is Directory = true `` Can Anybody advise how to do to get net disk available using Tomcat 5.5.9 ! Thanks NanFei 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: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
The Server PUSH tech?
I hava search for Server PUSH for a long time. But I still don't know it. Can you teach me? [EMAIL PROTECTED]
