RE: Broken pipe problem
This exception is harmless exception. You can also ignore it ... If you want to. It doesn't stop weblogic from processing requests. Regards, Abhishek. -Original Message- From: Ray [mailto:[EMAIL PROTECTED] Sent: Monday, March 01, 2004 2:59 PM To: Struts Users Mailing List Subject: Re: Broken pipe problem Thanks .. :-) I'll read up and give it a try ... --- [EMAIL PROTECTED] wrote: Hi this exception will occur in the following situation. 1. User uses the Stop, Back and forward button while the browser waiting for a respond. 2. He submits 1+ request to the server while the first request is on the process. To avoid that struts has some token mechanism (tokenInValid(), resetToken()) to implement. So that you can find out and filter the user action. We implemented this, and we are able to reduce this exception, but not completely Thanks Mohamed Abdul Khaliq.M IT Specialist SDC2 - Chennai Ph 8272628 Ext 8098 [EMAIL PROTECTED] co.ukTo: [EMAIL PROTECTED] cc: 02/29/2004 09:58 Subject: Broken pipe problem PM Please respond to Struts Users Mailing List Hi there ... :-) I was wondering if someone could help me with a 'broken pipe' error? Every so often, my Tomcat server throws out this error. -- 2004-02-27 09:40:25 - Ctx(/letsco) : Broken pipe in R( /letsco + /editmail.jsp + null) - java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.tomcat.modules.server.Ajp13.send(Ajp13.java:841) at org.apache.tomcat.modules.server.Ajp13.doWrite(Ajp13.java:727) at org.apache.tomcat.modules.server.Ajp13Response.doWrite(Ajp13Interceptor.java :491) at org.apache.tomcat.core.OutputBuffer.realWriteBytes(OutputBuffer.java:188) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:360) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:338) at org.apache.tomcat.util.buf.IntermediateOutputStream.write(C2BConverter.java: 234) at sun.nio.cs.StreamEncoder$CharsetSE.writeBytes(StreamEncoder.java:334) at sun.nio.cs.StreamEncoder$CharsetSE.implFlushBuffer(StreamEncoder.java:402) at sun.nio.cs.StreamEncoder$CharsetSE.implFlush(StreamEncoder.java:406) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:150) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:213) at org.apache.tomcat.util.buf.WriteConvertor.flush(C2BConverter.java:183) at org.apache.tomcat.util.buf.C2BConverter.flushBuffer(C2BConverter.java:126) at org.apache.tomcat.core.OutputBuffer.realWriteChars(OutputBuffer.java:337) at org.apache.tomcat.util.buf.CharChunk.flushBuffer(CharChunk.java:388) at org.apache.tomcat.core.OutputBuffer.flush(OutputBuffer.java:314) at org.apache.tomcat.core.OutputBuffer.close(OutputBuffer.java:305) at org.apache.tomcat.core.Response.finish(Response.java:271) at org.apache.tomcat.modules.server.Ajp13Response.finish(Ajp13Interceptor.java: 483) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:838) at org.apache.tomcat.modules.server.Ajp13Interceptor.processConnection(Ajp13Int ercept or.java:341) at
Avoiding app server restarts while doing struts development
Hello All, I develop my apps on weblogic app server. When doing development on struts I feel for every little operation (change in resource file, change in source file, change config files) it requires me to either redeploy the app or to restart the app server. I have tried to switch to the debug mode, but still the number of redeploys or restarts have not reduced. I find these very time-consuming. Has someone figured out a way in which they can do development without redeployment at every single change? Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Bean:message in attribute causes non-matching extension tags error
Hello All,
I am trying to have text from my property file appear into one of the
attributes of an html select element. The code which I have written is
html:select property=destinationType onchange=
javascript:fnLocationBlur(); fnChangeZoomImage()
onfocus=fnSetFocus('0');window.status ='bean:message
key=select.destination.type/'; return true value =
'%=destinationType%'
html:option value=citycity/html:option
html:option value=statestate/html:option
html:option value=countrycountry/html:option
/html:select
However when invoke the jsp I get an exception
/jsp/WcNoNc/Query.jsp(575): Non-matching extension tags //[ null; Line:
575]
probably occurred due to an error in /jsp/WcNoNc/Query.jsp line 575:
/html:select
What am I doing wrong? How can I get the text from my property file into one
of the html attributes?
Thanks for your help in advance.
Regards,
Abhishek.
-
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[REPOST] Struts throws exception during load testing
Hello All, I had posted this yesterday, but didn't receive any response so far. This error is coming more and more frequently when we increase the load on struts. Worst thing is that the stack trace shows that this error is not originated from any of my source. It seems to be an error being thrown by struts. The error is coming only during load testing. It doesn't come during a single user testing. I am using struts 1.1 on BEA weblogic 8.1 on HP-UX 11i. Can anyone who is an expert on struts internals have a look at this and tell me what is going wrong? Thanks for your help in advance.[Sorry for reposting this... But since using struts was my idea, now I am being questioned... And I have no clue about why this error comes] Here is the stack trace : Jan 15, 2004 10:02:28 PM IST Error HTTP BEA-101020 [ServletContext(id=28318025,name=testWebApp,context-path=/testWebApp)] Servlet failed with Exception java.lang.NullPointerException at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle tStubImpl.java:1053) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :387) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :305) at weblogic.servlet.internal.RequestDispatcherImpl$ForwardAction.run(RequestDis patcherImpl.java:382) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubjec t.java:317) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImp l.java:286) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:10 69) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcesso r.java:274) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProces sor.java:455) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequ estProcessor.java:320) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle tStubImpl.java:1053) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :387) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :305) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W ebAppServletContext.java:6310) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubjec t.java:317) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo ntext.java:3622) at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java :2569) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170) Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Struts throws exception during load testing
Hello All, My application works fine when I test it with my browser. But if I run load test on it (25 parallel users) I start getting this exception periodically. However in the stack trace I cannot see any of my code. Why is the struts code generating this exception? That too only under minor loaded conditions? I am using struts 1.1 on BEA weblogic 8.1 Thanks for your help in advance. Here is the stack trace : Jan 15, 2004 10:02:28 PM IST Error HTTP BEA-101020 [ServletContext(id=28318025,name=testWebApp,context-path=/web samWebApp)] Servlet failed with Exception java.lang.NullPointerException at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle tStubImpl.java:1053) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :387) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :305) at weblogic.servlet.internal.RequestDispatcherImpl$ForwardAction.run(RequestDis patcherImpl.java:382) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubjec t.java:317) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImp l.java:286) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:10 69) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcesso r.java:274) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProces sor.java:455) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequ estProcessor.java:320) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle tStubImpl.java:1053) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :387) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java :305) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W ebAppServletContext.java:6310) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubjec t.java:317) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo ntext.java:3622) at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java :2569) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170) Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Mandatory use of form rather than request object
Hello All, I did some code reviews recently for my project being done on struts. I found that most people still do a request.getAttribute(NAME) kind of code even when the name is a property of the form object and is available in the form object. My question is should the use of form be mandatory. If yes, how it can be enforced. Is there quick way I can remove all the params/attributes from the request object once the corresponding values have been set in the form object? Thanks in advance for your advise. Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Commons validation framework and struts
Hello Robert, Yes. I have also defined the validator plugin in my struts-config.xml file. I am attaching my example code here. Please tell me why it is not working. Thanks for your help and patience. Regards, Abhishek. -Original Message- From: Robert Taylor [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 8:21 PM To: Struts Users Mailing List Subject: RE: Commons validation framework and struts Your field names aren't the same. operator1 != operand1 operator2 != operand2 They must be the same or validation on those fields won't occur. robert -Original Message- From: Abhishek Srivastava [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 9:35 AM To: [EMAIL PROTECTED] Subject: Commons validation framework and struts Hello All, I am trying to learn the new validation framework provided with struts 1.1 and am facing a few problems. I have a form object which I have derived from ValidatorForm class. In this form I have fields like operator1, operator2. I have created a file called validation.xml where I have made entries like form-validation formset form name='calcForm' field name='operand1' depends='required' /field field name='operand2' depends='required' /field /form /formset /form-validation The entry for action in my struts config is action path='/calc' type='com.abhi.CalcAction' scope='request' name='calcForm' parameter='action' input='/calc.jsp' validate='true' forward name='success2' path='/calc.jsp' / /action form-bean name=calcForm type=com.abhi.CalcForm / The application is working fine. Except that when I leave the fields operator1 or operator2 empty then no error is reported. Is there some step which I have missed out? Please help me out. Regards, Abhishek. - 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: Commons validation framework and struts
Hello Ben, I am not using Dynamic forms. I have defined my own form object which derives from ValidatorForm. Are you saying that I must switch to dynamic forms if I want to use the validator framework? Or define my own validtors? One thing which I couldn't find in the validation framework was how to do validation only for a specific value. In my example I have operand1, operand2 and operator. If the operand2 is 0 and the operator is /, then I would like to check this and raise an error division by 0 not allowed for other operators 0 is allowed for operand2. Actually with this prototype I was trying to find out how useful the validation framework is. Also, last time when I worked on struts the validation logic was put inside the form class itself. Is that still allowed? I also have some concerns regarding the use of the XML based validation framework. For my application, validation can get very complex. If I try to do everything via XML then the XML will get bloated and perhaps more complex than the java code. I would need advise from people who have used this framework for complex data validation to confirm whether it can easily be achieved and whether the xml code is easily understandable. Regards, Abhishek. -Original Message- From: Ben Anderson [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 8:21 PM To: [EMAIL PROTECTED] Subject: RE: Commons validation framework and struts You need to decide if you want to use Struts validation or define your own class. You're example below is inconsistent: If you want to use Struts validation(which you probably do): struts-config.xml --- form-bean name=calcForm type=org.apache.struts.validator.DynaValidatorForm form-property name=operand1 type=java.lang.String/ form-property name=operand2 type=java.lang.String/ /form-bean If you are writing your own validation class, you'll want something along these lines: validation.xml validator name=requiredArray classname=com.paychex.validator.CustomFieldChecks method=validateRequiredArray methodParams=java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionErrors, javax.servlet.http.HttpServletRequest msg=errors.requiredArray/ You could also implement DynaValidatorActionForm if you want to validate per action rather than per form. hth, Ben From: Abhishek Srivastava [EMAIL PROTECTED] Reply-To: Struts Users Mailing List [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Commons validation framework and struts Date: Fri, 12 Dec 2003 20:04:36 +0530 Hello All, I am trying to learn the new validation framework provided with struts 1.1 and am facing a few problems. I have a form object which I have derived from ValidatorForm class. In this form I have fields like operator1, operator2. I have created a file called validation.xml where I have made entries like form-validation formset form name='calcForm' field name='operand1' depends='required' /field field name='operand2' depends='required' /field /form /formset /form-validation The entry for action in my struts config is action path='/calc' type='com.abhi.CalcAction' scope='request' name='calcForm' parameter='action' input='/calc.jsp' validate='true' forward name='success2' path='/calc.jsp' / /action form-bean name=calcForm type=com.abhi.CalcForm / The application is working fine. Except that when I leave the fields operator1 or operator2 empty then no error is reported. Is there some step which I have missed out? Please help me out. Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] _ Cell phone 'switch' rules are taking effect - find out more here. http://special.msn.com/msnbc/consumeradvocate.armx - 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: Commons validation framework and struts
Hello Robert, Thanks for your reply. It's a typo in my email. My form has fields operand1, operand2 and operator. I have defined the same in the validation.xml still the validation does not occur. Please tell me what am I going wrong. Regards, Abhishek. -Original Message- From: Robert Taylor [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 8:21 PM To: Struts Users Mailing List Subject: RE: Commons validation framework and struts Your field names aren't the same. operator1 != operand1 operator2 != operand2 They must be the same or validation on those fields won't occur. robert -Original Message- From: Abhishek Srivastava [mailto:[EMAIL PROTECTED] Sent: Friday, December 12, 2003 9:35 AM To: [EMAIL PROTECTED] Subject: Commons validation framework and struts Hello All, I am trying to learn the new validation framework provided with struts 1.1 and am facing a few problems. I have a form object which I have derived from ValidatorForm class. In this form I have fields like operator1, operator2. I have created a file called validation.xml where I have made entries like form-validation formset form name='calcForm' field name='operand1' depends='required' /field field name='operand2' depends='required' /field /form /formset /form-validation The entry for action in my struts config is action path='/calc' type='com.abhi.CalcAction' scope='request' name='calcForm' parameter='action' input='/calc.jsp' validate='true' forward name='success2' path='/calc.jsp' / /action form-bean name=calcForm type=com.abhi.CalcForm / The application is working fine. Except that when I leave the fields operator1 or operator2 empty then no error is reported. Is there some step which I have missed out? Please help me out. Regards, Abhishek. - 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]
Commons validation framework and struts
Hello All, I am trying to learn the new validation framework provided with struts 1.1 and am facing a few problems. I have a form object which I have derived from ValidatorForm class. In this form I have fields like operator1, operator2. I have created a file called validation.xml where I have made entries like form-validation formset form name='calcForm' field name='operand1' depends='required' /field field name='operand2' depends='required' /field /form /formset /form-validation The entry for action in my struts config is action path='/calc' type='com.abhi.CalcAction' scope='request' name='calcForm' parameter='action' input='/calc.jsp' validate='true' forward name='success2' path='/calc.jsp' / /action form-bean name=calcForm type=com.abhi.CalcForm / The application is working fine. Except that when I leave the fields operator1 or operator2 empty then no error is reported. Is there some step which I have missed out? Please help me out. Regards, Abhishek. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Struts Actions are Singletons?
And to make it thread safe I have use synchronize blocks of code which can cause all the requests to get queued up. (Java has lock per object, therefore if my code had 2 synchronized blocks, then the 2nd block would lock up even when the first one is being executed.) Isn't this bad for performance? regards, Abhishek. - Original Message - From: Nelson, Laird [EMAIL PROTECTED] To: 'Struts Users Mailing List' [EMAIL PROTECTED] Sent: Wednesday, April 24, 2002 6:27 PM Subject: RE: Struts Actions are Singletons? -Original Message- From: abhishek srivastava [mailto:[EMAIL PROTECTED]] Are the Action classes that we write for Struts Singletons? or are they created and destroyed per request. http://jakarta.apache.org/struts/doc-1.0.2/userGuide/building_controller.htm l#action_classes Excerpt: The controller servlet creates only one instance of your Action class, and uses it for all requests. Thus, you need to code your Action class so that it operates correctly in a multi-threaded environment, just as you must code a servlet's service() method safely. Cheers, Laird -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Struts with WAP+HTML projects
Hello All, Apologies for posting this again. If you had replied to my question could you please re-send your post to my email address directly ([EMAIL PROTECTED]). Because of my mistake in seting up rules for my mail client all mails from this mailing list were getting deleted. -- I am working on a project which is for a portal which serves to HTML and WAP clients. This project is developed using a home grown MVC model + jsp + XSL So one jsp serves many types of clients by looking up the header sent by the device and applying the right XSL file .. thus creating WML or HTML output depending upon what the client device type is. The application logic remains the same no matter what the client device is. We are having lot of problems with our home grown MVC framework and want to use struts ... from all the initial examples it appears that struts is used only for jsp pages serving HTML output. How can I use struts in a multi channel (WAP, HTML, PDA) portal like ours? I don't want to write a new jsp per device type. the jsp and action classes should remain the same only the XSL changes per device type. I would appreciate your help, also please share your experience about using struts in a WML+HTML project. regards, Abhishek. --- _ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Struts with WAP+HTML projects
Hello All, I am working on a project which is for a portal which serves to HTML and WAP clients. This project is developed using a home grown MVC model + jsp + XSL So one jsp serves many types of clients by looking up the header sent by the device and applying the right XSL file .. thus creating WML or HTML output depending upon what the client device type is. The application logic remains the same no matter what the client device is. We are having lot of problems with our home grown MVC framework and want to use struts ... from all the initial examples it appears that struts is used only for jsp pages serving HTML output. How can I use struts in a multi channel (WAP, HTML, PDA) portal like ours? I don't want to write a new jsp per device type. the jsp and action classes should remain the same only the XSL changes per device type. I would appreciate your help, also please share your experience about using struts in a WML+HTML project. regards, Abhishek. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Action an overkill ??
Hello All, I render a table through my jsp page. The user can sort the table by clicking on each of the column headers. When the user clicks on the column header, an Action is invoked and the data that is used to render the table is sorted accordingly and placed back into the session. Now the control is forwarded to the jsp that renders the table with sorted data/ I have got some feedback that using Action for things like sorting a table is an overkill. what is suggested that each table column should point to a jsp which should use a custom tag library to sort the table. I am unable to decide which approach to take and why. Can someone help me on this. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Action an overkill ??
Thanks for your reply, There is a debate in my team these days on the use of Jsp Tags versus Actions. Some jsp developers feel that ejbs should be accessed via tag libraries, databases should be accessed via tag libraries and for simple rendering things like sorting a table jsp tag libraries should be used. While others like to use Actions for all the things mentioned above. Is there a document somewhere which describes what tasks are better suited for actions and what tasks are better suited for tag libraries. Technically, things mentioned above can be done easily by either as action or as jsp tags.But I want to make a consistent decision through out the application. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -Original Message- From: Alexander Jesse [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 4:05 PM To: struts-user Subject: RE: Action an overkill ?? Hi, going through the action hides the presentation-implementation from the user's eyes. For example, the user will only see .../do/showTable (or .../showTable.do) in the browser's address line and therefor not be able to bookmark the jsp-file, when you use an action. The action also allows you to change more implementation details without having to change the presentation (JSP-file)... I advocate strict use of actions in every case... = NEVER use a jsp-link, ALWAYS use an action just my two cents... Alexander Jesse -Original Message- From: Abhishek Srivastava [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 10:54 AM To: Struts-User (E-mail) Subject: Action an overkill ?? Hello All, I render a table through my jsp page. The user can sort the table by clicking on each of the column headers. When the user clicks on the column header, an Action is invoked and the data that is used to render the table is sorted accordingly and placed back into the session. Now the control is forwarded to the jsp that renders the table with sorted data/ I have got some feedback that using Action for things like sorting a table is an overkill. what is suggested that each table column should point to a jsp which should use a custom tag library to sort the table. I am unable to decide which approach to take and why. Can someone help me on this. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Action an overkill ??
Ted's Catalog was useful in this regard as it clearly say no linking to jsps so no more sorting a table by jsp as it leads to a jsp making a hyperlink to itself rather than an action. Wish I could find something on the access of Ejbs via jsp-tags vs. Actions also. The feeling here is that use of Tag libraries is not mixing jsp code with business logic. instead it is regarded as a way or creating reusable code across jsp pages without mixing java with jsp code. which also appears to be true for Actions. The only issue seems to be which one should be used as a standard. Thanks a lot for your reply and help. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -Original Message- From: Alexander Jesse [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 4:47 PM To: struts-user Subject: RE: Action an overkill ?? You're welcome... Documents... - The archtectural papers for Struts (and other web-frameworks) - Ted's Catalog - the javaworld-article (have no url ready...) on Model 2 - Jason Hunters ranting against JSP - common sense (at least for a huge number of web-application programmers) all dictate never to mix JSP with business-logic. I think it boils down to: Do I want to have a separation of concerns as mandated by OO-style and the MVC-pattern, or do I want to have the least possible number of components? Following the MVC-style (one of the Struts-goodies) mandates the use of action and a restricted use of business-logic-custom tags. hope this helps Alexander Jesse -Original Message- From: Abhishek Srivastava [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 11:53 AM To: 'Struts Users Mailing List' Subject: RE: Action an overkill ?? Thanks for your reply, There is a debate in my team these days on the use of Jsp Tags versus Actions. Some jsp developers feel that ejbs should be accessed via tag libraries, databases should be accessed via tag libraries and for simple rendering things like sorting a table jsp tag libraries should be used. While others like to use Actions for all the things mentioned above. Is there a document somewhere which describes what tasks are better suited for actions and what tasks are better suited for tag libraries. Technically, things mentioned above can be done easily by either as action or as jsp tags.But I want to make a consistent decision through out the application. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -Original Message- From: Alexander Jesse [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 4:05 PM To: struts-user Subject: RE: Action an overkill ?? Hi, going through the action hides the presentation-implementation from the user's eyes. For example, the user will only see .../do/showTable (or .../showTable.do) in the browser's address line and therefor not be able to bookmark the jsp-file, when you use an action. The action also allows you to change more implementation details without having to change the presentation (JSP-file)... I advocate strict use of actions in every case... = NEVER use a jsp-link, ALWAYS use an action just my two cents... Alexander Jesse -Original Message- From: Abhishek Srivastava [mailto:[EMAIL PROTECTED]] Sent: Wednesday, December 05, 2001 10:54 AM To: Struts-User (E-mail) Subject: Action an overkill ?? Hello All, I render a table through my jsp page. The user can sort the table by clicking on each of the column headers. When the user clicks on the column header, an Action is invoked and the data that is used to render the table is sorted accordingly and placed back into the session. Now the control is forwarded to the jsp that renders the table with sorted data/ I have got some feedback that using Action for things like sorting a table is an overkill. what is suggested that each table column should point to a jsp which should use a custom tag library to sort the table. I am unable to decide which approach to take and why. Can someone help me on this. regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava
How to get ActionForm as input
Hello All, I have a html:form this form can be used to create, read, update and delete a record from a ejb service. Since one form can have only one html:submit / button, I have created all four of these operations as hyperlinks. Now when I click on these links My Action does get executed, but nothing of ActionForm is populated. The reason I guess is that I have not done a Form-submit How can I have the ActionForm populated? I tried giving the input attribute to the actionmapping in struts.config but that did not help. Is it possible that I can have multiple html:submit buttons each pointing to a different action. that way also I can solve my problem. Else there should be some way to populate the Form even when a form.submit was not done. Please help. regards, Abhishek. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Usage to Table with struts
Hello All,
I have 2 questions regarding the display of a html table when using struts.
1. Is there a table tag library with struts. currently I am rendering the
table my means of a scriptlet.
something like
%
Collection col = (Collection) session.getAttribute(list);
for(Interator i = col.iterator(); i.hasNext();) {
%
tr
td /td
/tr
%
}
%
Is this the correct way of rendering a table with struts (I wish not to use
scriptlets as far as possible.)
2. I want to let the user sort the table also, based on each column.
The question is that do I have to write a separate action class for each
sort?
is there a simpler way of giving the user the ability to sort the table
based
on each column of the table.
Thanks in advance for your help.
regards,
Abhishek.
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Action does not get executed
Hello All, I have a menu, in which I put the a hyperlink to a jsp. When this jsp is displayed, some of the fields should have data pre-populated in it. This data which is used to pre-populate the form is fetched from ejbs. Now, I have written a struts Form class and a struts Action class and made correct entries in struts-config.xml. But when I click on the link and the jsp page is displayed then all values are null, because the Action never got executed. Is it that struts classes like ActionForm and Action are executed only when I do a POST from a FORM element? when I initially load my jsp there is no form, just a click on the menu to bring up the html. How can I pre-populate the data. one approach is that I write a simple java bean that fetched the data from ejb and use this bean in my jsp directly. But i want that only Action classes should make contact with ejbs for consistency sake. please help. regards, Abhishek. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Action does not get executed
Thank you Gitangali for your reply. I removed the input attribute from the action element. My menu points towards my jsp. html:link href='/jsp/applist.jsp'applications list/html:link if I click on it, the my action does not get executed. and the no values are prefilled when the jsp comes up. Now, If I write a dummy jsp called applistdummy.jsp here I have just one html form that html:form action=/AppList table border=1 width=60% align=center tr td align=center html:submitsubmit/html:submit /td td align=center html:resetreset/html:reset /td /tr /table now if I click submit, my action does get executed it forwards the control to /jsp/applist.jsp and it does come up with all the prepopulated data. Problem is that I do not want to have dummy html forms do get my main form with some pre filled data. Is it possible to pre-fil the form just by clicking on the menu and not having a dummy form in between? Thank you so much for your help. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 2:11 PM To: Struts Users Mailing List; [EMAIL PROTECTED] Subject: Re: Action does not get executed hi, To prepopulate the data,u need to call the Action class first,which will get the data from EJB , and redirect to the jsp.This jsp will read the values from bean and show them.For doing this,in struts-config.xml, you shouldn't use input attribute of the action tag,becoz first Action class needs to run. Hope it helps. regards, gitanjali. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Action does not get executed
YAHHOOO IT WORKS!! Thank you Gitangali for your help. I really appreciate it. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 6:04 PM To: [EMAIL PROTECTED] Subject: RE: Action does not get executed suppose following is ur entry in struts-config.xml file : action path=/SaveData type=SaveDataAction name=userForm scope=session validate=false forward name=success path=/form.jsp/ /action And in web.xml , if u have mapped ActionServlet to *.do then, the link for SaveDataAction will be SaveData.do. So the link will be like this: html:link href='/SaveData.do'App list/html:link Abhishek Srivastava [EMAIL PROTECTED] on 11/23/2001 11:11:35 PM Please respond to [EMAIL PROTECTED] To: Gitanjali Singh/Satyam@Satyam cc: Subject RE: Action does not get executed : Ahh I am still missing it I tried to configure my menu the 2 ways but both gave errors 1. I put the class of the Action in the href html:link href='/my-app/WEB-INF/classes/com/abhi/html/apps/action/AppLi stAction.class' App list /html:linkbr/ Resutl is that the tomcat says that it cannot find the class file. 2. Put the Action (same as what I put in the action of the dummy form). html:link href='/AppList'App List/html:linkbr/ now tomcat says that the requested resource is not available. On success condition I do forward the control to my jsp and this works fine so long as I come via the dummy form. From the menu it stops to work. Thanks a lot for your help. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 5:20 PM To: Struts Users Mailing List; [EMAIL PROTECTED] Subject: RE: Action does not get executed To remove the dummy jsp page,u need to point to the action class directly instead of the jsp page and on success of this action forward ur request to the jsp page. regards, gitanjali. Abhishek Srivastava [EMAIL PROTECTED] on 11/23/2001 10:43:57 PM Please respond to Struts Users Mailing List [EMAIL PROTECTED]; Please respond to [EMAIL PROTECTED] To: 'Struts Users Mailing List' [EMAIL PROTECTED] cc: (bcc: Gitanjali Singh/Satyam) Subject RE: Action does not get executed : Thank you Gitangali for your reply. I removed the input attribute from the action element. My menu points towards my jsp. html:link href='/jsp/applist.jsp'applications list/html:link if I click on it, the my action does not get executed. and the no values are prefilled when the jsp comes up. Now, If I write a dummy jsp called applistdummy.jsp here I have just one html form that html:form action=/AppList table border=1 width=60% align=center tr td align=center html:submitsubmit/html:submit /td td align=center html:resetreset/html:reset /td /tr /table now if I click submit, my action does get executed it forwards the control to /jsp/applist.jsp and it does come up with all the prepopulated data. Problem is that I do not want to have dummy html forms do get my main form with some pre filled data. Is it possible to pre-fil the form just by clicking on the menu and not having a dummy form in between? Thank you so much for your help. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 2:11 PM To: Struts Users Mailing List; [EMAIL PROTECTED] Subject: Re: Action does not get executed hi, To prepopulate the data,u need to call the Action class first,which will get the data from EJB , and redirect to the jsp.This jsp will read the values from bean and show them.For doing this,in struts-config.xml, you shouldn't use input attribute of the action tag,becoz first Action class needs to run. Hope it helps. regards
RE: Action does not get executed
Ahh I am still missing it I tried to configure my menu the 2 ways but both gave errors 1. I put the class of the Action in the href html:link href='/my-app/WEB-INF/classes/com/abhi/html/apps/action/AppLi stAction.class'App list /html:linkbr/ Resutl is that the tomcat says that it cannot find the class file. 2. Put the Action (same as what I put in the action of the dummy form). html:link href='/AppList'App List/html:linkbr/ now tomcat says that the requested resource is not available. On success condition I do forward the control to my jsp and this works fine so long as I come via the dummy form. From the menu it stops to work. Thanks a lot for your help. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 5:20 PM To: Struts Users Mailing List; [EMAIL PROTECTED] Subject: RE: Action does not get executed To remove the dummy jsp page,u need to point to the action class directly instead of the jsp page and on success of this action forward ur request to the jsp page. regards, gitanjali. Abhishek Srivastava [EMAIL PROTECTED] on 11/23/2001 10:43:57 PM Please respond to Struts Users Mailing List [EMAIL PROTECTED]; Please respond to [EMAIL PROTECTED] To: 'Struts Users Mailing List' [EMAIL PROTECTED] cc: (bcc: Gitanjali Singh/Satyam) Subject RE: Action does not get executed : Thank you Gitangali for your reply. I removed the input attribute from the action element. My menu points towards my jsp. html:link href='/jsp/applist.jsp'applications list/html:link if I click on it, the my action does not get executed. and the no values are prefilled when the jsp comes up. Now, If I write a dummy jsp called applistdummy.jsp here I have just one html form that html:form action=/AppList table border=1 width=60% align=center tr td align=center html:submitsubmit/html:submit /td td align=center html:resetreset/html:reset /td /tr /table now if I click submit, my action does get executed it forwards the control to /jsp/applist.jsp and it does come up with all the prepopulated data. Problem is that I do not want to have dummy html forms do get my main form with some pre filled data. Is it possible to pre-fil the form just by clicking on the menu and not having a dummy form in between? Thank you so much for your help. regards, Abhishek. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Friday, July 23, 1999 2:11 PM To: Struts Users Mailing List; [EMAIL PROTECTED] Subject: Re: Action does not get executed hi, To prepopulate the data,u need to call the Action class first,which will get the data from EJB , and redirect to the jsp.This jsp will read the values from bean and show them.For doing this,in struts-config.xml, you shouldn't use input attribute of the action tag,becoz first Action class needs to run. Hope it helps. regards, gitanjali. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
list boxes and struts
Hello All, Apologies for the re-post. I am trying to implement something which is trivial. but I am stuck very badly !! I want to have a drop down list box in my form. I don't know which data type should I use in my Form bean corresponding to this html form element (Collection ??) let me assume that I am using collection. let me say that in my action class I put 3 elements in that collection. (Pizza, Burger, Coke). how do I auto-select say index no 2 of the collection in the list box? Please do reply .. I am badly stuck. If someone has an example code sample then it will be great !! regards, Abhishek. A ship in harbor is safe, but that is not what ships are built for. John A. Shedd * * Abhishek Srivastava *** /_ __ *** Hewlett-Packard - Solutions Organization ** / / /_/ ** 19 Cunningham Road. Bangalore -560052. ***/*** phone +91 80 2251554 Extn:1532 * * mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Form class contacting an Ejb
hello all, I have a form, in which some of the fields should be populated by default when the form is displayed to the user. These values are available from an ejb. Is it OK, if I have an class which derives from ActionForm to contact an ejb and get default values? or should i keep these classes only for validation and create another Action class to contact Ejbs. thanks for your help. regards, Abhishek. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
List boxes and Form classes
Hello All, Another new-bie question. I have a html form that has a drop down box. When writing the Form object for this html form what should be the data type of the property which represents this field of the html-form? should it be a string or a collection type like ArrayList.(as the drop down has many options to choose from). Also, how do i indicate which value should be selected by default. Since struts would populate the value of the html forms with what is there inside the form bean. Any help would be greatly appreciated. regards, Abhishek. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
newbie got struck with error!!
Hello all, I tried my first action mapping sample today and I am facing the following problem. - java.lang.NoSuchMethodException at java.lang.Class.getMethod0(Native Method) at java.lang.Class.getMethod(Class.java:888) at org.apache.struts.digester.SetNextRule.end(SetNextRule.java:156) at org.apache.struts.digester.Digester.endElement(Digester.java:409) at org.xml.sax.helpers.XMLReaderAdapter.endElement(XMLReaderAdapter.java :347) at org.apache.xerces.parsers.SAXParser.endElement(SAXParser.java:1403) at org.apache.xerces.validators.common.XMLValidator.callEndElement(XMLVa lidator.java:1480) at org.apache.xerces.framework.XMLDocumentScanner.scanElement(XMLDocumen tScanner.java:1809) --- I have copied the struts.jar into the web-inf/lib directory. Attached is a zip file with the code of my application. I would very greatly appreciate any help. regards, Abhishek. test.zip -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
