Which is best practice for stowing objects, request or session context?
Hi all, A work colleague mentioned on Friday it would be better to place objects (beans and the like) which had been created in a servlet into the request context when exposing them to the JSP. To date all the code I've written stores beans and the like in the session context and all has appeared to be fine thus far. I understand the nature of the various contexts and how they relate to the process life cycle, etc. Can someone please shed some light on this and possibly explain the merits of placing the objects in either context? For example, what are the pitfalls of using the request context? Is there any material around which adequately details when or when not to use the specific contexts? Cheers. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Passing init params to a listener?
G'day all, Can someone please advise how to pass init params to a listener? For example, in my web.xml file I have the following listener currently defined as:- listener listener-classczone.db.InitConnectionPool/listener-class /listener At the moment all parameters are hard coded in the listener. If I want to extend the flexibility of the code by adding init parameters to the listener definition do I merely do this:- listener listener-classczone.db.InitConnectionPool/listener-class init-param param-namejdbcConnectionString/param-name param-value.../param-value /init-param /listener If this is correct then what Java code is required in the contextInitialized(...) method to pull the init parameter name and value so the listener can use it? I really don't have a clue what I'm doing so some guideance on this matter would be greatly appreciated! Thanks if you can help. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Passing init params to a listener?
G'day, I assume from this that init parameters can only be accessed by a listener if they have been declared globally within the applications context and not from within the scope of the listener itself? Hm AB -Original Message- From: Frank Burns [mailto:[EMAIL PROTECTED] Sent: Monday, 15 March 2004 12:30 AM To: Tomcat Users List; [EMAIL PROTECTED] Subject: Re: Passing init params to a listener? For each parameter you need your listener to read, place name/value pairs in your web.xml. Here's an example for two parameters (mySQLServerName and mySQLPort): context-param param-name mySQLServerName /param-name param-value localhost /param-value /context-param context-param param-name mySQLPort /param-name param-value 3306 /param-value /context-param Then, in your listener class, read them like this: String serverName = application.getInitParameter(mySQLServerName); String mySQLPort = application.getInitParameter(mySQLPort); - Original Message - From: Adrian Beech [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, March 11, 2004 2:07 PM Subject: Passing init params to a listener? G'day all, Can someone please advise how to pass init params to a listener? For example, in my web.xml file I have the following listener currently defined as:- listener listener-classczone.db.InitConnectionPool/listener-class /listener At the moment all parameters are hard coded in the listener. If I want to extend the flexibility of the code by adding init parameters to the listener definition do I merely do this:- listener listener-classczone.db.InitConnectionPool/listener-class init-param param-namejdbcConnectionString/param-name param-value.../param-value /init-param /listener If this is correct then what Java code is required in the contextInitialized(...) method to pull the init parameter name and value so the listener can use it? I really don't have a clue what I'm doing so some guideance on this matter would be greatly appreciated! Thanks if you can help. AB - 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]
Where is the source code that processes the server.xml file?
G'day all, Can someone please tell me where I might find the Java code in the Tomcat 5.0 source tree which is responsible for processing the server.xml file? I'm particularly looking for the code that is employed to handle the resource ... elements in the server.xml file. I would greatly appreciate any help in finding the code. Thanks. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Terminating or suspending an application if a on start up servlet throws an exception?
G'day, Is it possible to have Tomcat 4.1.x terminate or suspend access to an application if a servlet which is fired at start up throws an exception? For example, we have two servlets which are loaded on start up. The first one sets up the database connection pool and the second one does various other application initialisation type actions. If either one throws an exception then I'd like the application to be unavailable. Can this be done? If so then how? AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Setting up a data source resource reference using a JNDI property file
G'day folks, I was wondering if it is possible to set up a data source resource reference using a JNDI property file? If this is possible then does anyone have a sample sort of file that will show how to set up a connection pool to an Oracle DB? I have been successful thus far whilst developing with setting up the connection pool using the required tags elements in my local dev server.xml file but... sigh, alas I do not have access to the production platforms server.xml file to implement the necessary do dads... don't ask me why the boffins see fit to restrict this sort of thing here... it's a damn mystery :( So I'm sort of hand tied for the time being until some one here can give me a nod or two in the right direction! BTW, I am assuming that the JNDI property file can be app independant? Any help in this matter will be greatly appreciated! AB [EMAIL PROTECTED]
Has there been a stable (non beta) rlease of Tomcat 5 yet?
G'day folks, Well the subject line really says it all! Just wondering if there has been a Tomcat 5.0 release yet? So far I've only spotted 5.0.12 beta mentioned on the Apache (Jakarta section) web site. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Blowing away objects that have been stored in the session context
G'day all, Does Tomcat release all the resources used by an object if the object has been stored in the session context and a call to session.removeAttribute(objName) is made? I'd like to blow away several beans that are used throughout the processing of a transaction once the confirmation page is called. At this stage the only two ways I can think of doing this is to call session.removeAttribute(...) or retrieve the object from the session context and then assigning null to it, i.e. myObj = (MyObj) session.getAttribute(myObjName); myObj = null;. Can someone please shed some light on what is best? Or are these two possible ways totally off the track? Thanks if you can help. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat version 3 certificates?
G'day all, Earlier today we were advised by a bod from another section in our organisation that there is a known compatibility issue with Tomcat and version 3 certificates. Apparently he had been advised of this from someone at Verisign. Does such an issue really exist and if so is it solely a Tomcat issue or is it a result of something not quite working correctly in a particular JDK version? I find it a bit hard to believe that this claim is true. However as I'm no expert in the area I thought I'd pose the question before dismissing it out of hand. If such issues do exist I'd like to know where to find further information relating to the situation, scenario and/or workarounds. Thanks if you can shed some light on this one! AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
JSP seems to be executing twice and we are getting duplicate records in our database
Hi folks, We have a weird problem where a JSP seems to be executing twice and we are getting duplicate records in our database. The data is coming from a HTML form and upon submit a subsequent JSP page is called that performs the SQL insert, etc. We are also getting duplicate log messages so our initial conclusion is that it's a Tomcat related issue. We have tested this with Tomcat 3.3.1, J2SE 1.3.1 and from the client side using both IE 5.5 and 6.0 and it happens intermittently. At this stage we have absolutely no idea of what is going on. Alas I didn't write the code so I'm not up to speed with its structure, flow or functionality. I've searched the list archive and there appears to be several references to similar problems. However I am unable to find any real answer to what might be causing this problem. Hoping someone out yonder can help. AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: JSP seems to be executing twice and we are getting duplicaterecords in our database
Hi Bill, Would I be right in assuming that you're inferring a user is submitting the form multiple times by clicking the submit button/link more than once? Or are you perhaps suggesting the browser is sending multiple requests without user intervention to the server hence the reason why the responding JSP is processing duplicate requests to insert the data twice? I understand your suggestions and points. I don't however understand why the problem is occuring as in our case the additional execution of the JSP doesn't appear to be initiated by the user -- i.e. multiple clicks on a submit button, etc. I've triggered the submit using keyboard control which should initiate only one instance of the form data being sent to the server and the problem still occurs. It also seems a bit kludgy to first determine if a session ID associated with a specific record already exists prior to inserting a new row. AB -Original Message- From: Bill Lunnon [mailto:[EMAIL PROTECTED] Sent: Monday, 4 August 2003 9:27 PM To: Tomcat Users List; [EMAIL PROTECTED] Subject: RE: JSP seems to be executing twice and we are getting duplicate records in our database Adrian, If you do not want anothe rows created every time the page is submitted, then you are going to have to implement something to stop this. TOMCAT will not do this for you. Without knowing the requirements for the form, stopping multiple rows being generated could be as simple as: - Assign a session to the user (clients browser). - When the form is submitted, capture the sessionId in the database with the record. - If there is no row with the sessionId in the database, create a new record with an insert. If there is a existing session, use an update to modify the record. Hope this helps Bill -Original Message- From: Adrian Beech [mailto:[EMAIL PROTECTED] Sent: Monday, 4 August 2003 8:45 PM To: [EMAIL PROTECTED] Subject: JSP seems to be executing twice and we are getting duplicate records in our database Hi folks, We have a weird problem where a JSP seems to be executing twice and we are getting duplicate records in our database. The data is coming from a HTML form and upon submit a subsequent JSP page is called that performs the SQL insert, etc. We are also getting duplicate log messages so our initial conclusion is that it's a Tomcat related issue. We have tested this with Tomcat 3.3.1, J2SE 1.3.1 and from the client side using both IE 5.5 and 6.0 and it happens intermittently. At this stage we have absolutely no idea of what is going on. Alas I didn't write the code so I'm not up to speed with its structure, flow or functionality. I've searched the list archive and there appears to be several references to similar problems. However I am unable to find any real answer to what might be causing this problem. Hoping someone out yonder can help. AB - 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: Servlets JSPs log to different files
G'day, Can anyone expand on this further and explain how to use a Log4j logger reference in beans that do not have a notion of what the underlying servlet context is? The only way I can see how to get this to work is to pass the logger reference as an argument in the bean's constructor. My query does seem to be out of context for this list so my apologies in advance. AB -Original Message- From: Shapira, Yoav [mailto:[EMAIL PROTECTED] Sent: Saturday, 2 August 2003 3:24 AM To: Tomcat Users List Subject: RE: Servlets JSPs log to different files Howdy, Then use log4j. Yoav Shapira Millennium ChemInformatics -Original Message- From: Rick Roberts [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 1:18 PM To: Tomcat Users List Subject: Re: Servlets JSPs log to different files How are you logging in your servlets? Are you using System.out/System.err? If so, don't use them, and instead use the ServletContext#log(..) methods. Actually, they are mostly beans with no ServletContext :( -- *** * Rick Roberts* * Advanced Information Technologies, Inc. * *** - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Combining Jboss Tomcat?
G'day folks, I currently have an existing Tomcat 4.1.24 and J2SE 1.4.2 set up under Windows XP Pro and all seems to be sweet. Now I'd like to extend things a bit and add Jboss into the loop for EJB support. Are there HOWTO's floating around which describe the installation and configuration of Tomcat and Jboss in fairly easy to understand step by step instructions? I see that Jboss 3.2.1 and 4.0 come bundled with Tomcat 4.1.24. How would this effect an existing Tomcat set up? I am assuming (from what I've read thus far) that Tomcat 4.1.24 does not support EJB... Or have I missed something? Furthermore I'd assume that I would need J2EE as opposed to J2SE? AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Resolving scriptlets when using a client side SCRIPT ... tag?
G'day folks, Is it possible to get Tomcat to process a include file and resolve embedded scriptlets if the file is referenced from a client side SCRIPT ... tag? In the two .js files I'm trying to work with there are several scriptlets that need to be resolved by Tomcat prior to sending the content along to the browser. I can use %@ include file=... % server side which works just dandy, however the resulting content is easily visible to the user if they happen to view the source of the currently displayed page. My preference is to use SCRIPT TYPE=text/javascript LANGUAGE=JavaScript SRC=Includes/InboundContact_Form.js/SCRIPT client side so that the code is not part of the displayable source on the client's browser. The problem I've run into is that when using a SCRIPT ... tag the scriptlets are not resolved by Tomcat and what I end up with is something like 'var orgName = %= orgReference.getOrganisationName() %;' instead of 'var orgName = Brisbane City Council;' on the client's side. Can anyone please help? AB - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
What sort of servlet is required when using it with auto load?
Hi folks, I would like to put together a servlet that will be used solely for setting up such things as connection pools, etc. This servlet will be auto loaded when Tomcat is started with the appropriate entries in the web.xml file. The connection pools will be saved as an application scoped object for use by various JSP's. The servlet will not serve up web content except, I guess, appropriate error messages, etc. My query is that what sort of servlet do I need to achieve this? For example, is the class an extension of httpServlet, or can it be a simple class that does not inherit objects from another higher level class? Are there any examples of this sort of thing floating out yonder? I am probably the rawest of raw novices when it comes to this sort of stuff! Thanks for your patience. Adrian [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Is Tomcat/MySQL a suitable combination in a production environment under Windows 2000 Pro?
Hi folks, Is Tomcat/MySQL stable enough to deploy as a production platform under Windows 2000 Pro? I'm looking for a suitable platform to publish data driven web pages in a local Intranet environment. At present we are using PWS/MS Access under Windows 95. I'd like to move onto something which is slightly more robust solution that doesn't cost the earth... actually if it doesn't cost nothing then much the better! Adrian [EMAIL PROTECTED]
Is Tomcat/MySQL suitable to deploy as a production platform under Windows 2000 Pro?
Hi folks, Is Tomcat/MySQL stable enough to deploy as a production platform under Windows 2000 Pro? I'm looking for a suitable platform to publish data driven web pages in a local Intranet environment. At present we are using PWS/MS Access under Windows 95. I'd like to move onto something which is slightly more robust solution that doesn't cost the earth... actually if it doesn't cost nothing then much the better! Adrian [EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Re: Adobe Acrobat
Huh, there is a printer driver that produces PDF files? Tell me more... oh please tell me more! This could be an answer to an issue I have with trying to read reports generated in Crystal reports within a browser, h... Adrian [EMAIL PROTECTED] - Original Message - From: John Burgess [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Tuesday, April 09, 2002 6:55 PM Subject: RE: Adobe Acrobat Or alternatively use a printer driver that produces pdf files (Adobe Acrobat or Xeon Docucom are two) and print to file from the servlet, then return the file produced. The other suggestions are probably neater and open source but this does definitely work :-) Best Wishes John Burgess [EMAIL PROTECTED] Tel: 01865 718666 Fax: 01865 718600 -Original Message- From: Ravindra K. Bhat [mailto:[EMAIL PROTECTED]] Sent: Monday, April 08, 2002 10:39 PM To: Tomcat Users List Subject: Adobe Acrobat Hi: How do I render my html pages to pdf for printing. My servelet generated html table is too wide and columns get cut off if I print directly using the print icon on the browser... Thanks -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.343 / Virus Database: 190 - Release Date: 22/03/02 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.343 / Virus Database: 190 - Release Date: 22/03/02 -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
Is there a native JDBC driver for MS Access?
G'day all, Is there a native JDBC driver for MS Access? A few postings I've seen in the list archive make mentioned that the JDBC/ODBC bridge is a bit dodgy. I have Tomcat 4.03 running as a standalone on a Win 2k pro box with JDK 1.3.1 installed. I'm rather new to Tomcat, JSP, JDBC, etc... Any help would be appreciated. Adrian Beech [EMAIL PROTECTED]
Re: Is there a native JDBC driver for MS Access?
Um, okay then how stable is the JDBC/ODBC bridge? As I previously mentioned in my initial posting some bits and peices that I've read suggest that this method of connecting to a DB back end is, or can be, a little dodgy. The comments basically revolved around the premise that the bridge is not capable of being threaded and it is considered by Sun to still be experimental. I got the impression that there is potential for data loss or corruption along with performance related issues. I guess I really need to know if it is reasonable to use Tomcat to host an environment that relies on this sort of DB connectivity. Adrian [EMAIL PROTECTED] - Original Message - From: Matt Gregory [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Saturday, April 06, 2002 11:06 PM Subject: Re: Is there a native JDBC driver for MS Access? No, you are forced to use the JDBC/ODBC bridge or purchase one of the proprietary drivers available. I know there are Paradox, FoxPro and dBase IV drivers but I have not seen any for Access. - Original Message - From: Adrian Beech [EMAIL PROTECTED] To: 'Tomcat Users List' [EMAIL PROTECTED] Sent: Sunday, April 07, 2002 6:47 AM Subject: Is there a native JDBC driver for MS Access? G'day all, Is there a native JDBC driver for MS Access? A few postings I've seen in the list archive make mentioned that the JDBC/ODBC bridge is a bit dodgy. I have Tomcat 4.03 running as a standalone on a Win 2k pro box with JDK 1.3.1 installed. I'm rather new to Tomcat, JSP, JDBC, etc... Any help would be appreciated. Adrian Beech [EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED] -- To unsubscribe: mailto:[EMAIL PROTECTED] For additional commands: mailto:[EMAIL PROTECTED] Troubles with the list: mailto:[EMAIL PROTECTED]
