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Cannot Process Actionmessages Instance Of

It's the same picture if you try the other exceptions. What if we had to invent a message handling scheme ourselves? Aug 21, 2011 8:42:07 PM org.apache.catalina.core.ApplicationDispatcher invoke SEVERE: Servlet.service() for servlet jsp threw exception java.lang.ClassCastException: org.apache.struts.action.ActionMessage cannot be cast to org.apache.struts.action.ActionError at org.apache.struts.taglib.html.ErrorsTag.doStartTag(ErrorsTag.java:215) at org.apache.jsp.SubmitPost_jsp._jspx_meth_html_005ferrors_005f0(SubmitPost_jsp.java:552) at org.apache.jsp.SubmitPost_jsp._jspService(SubmitPost_jsp.java:270) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) We'll need a jsp-page like this: Listing 6:The tryexception.jsp page <%@ page language="java" %> <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %> <%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %> <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>



If we enter "Exception" in the form and submit it, we'll see something like this in the browser (I've used Tomcat 4.1.12 for the examples): HTTP Status 500 - type Exception In the TryException class we'll call two methods tryChecked1 and tryChecked2, which throws two checked exceptions called MyException1 and MyException2. Somehow the mapping mechanism does not work any longer as it used to work when using the custom RequestProcessor in struts. The concern is when I am not using validate() method its working properly but when I am using validate() method form submitting automatically. https://coderanch.com/t/48437/framework/process-ActionErrors-instance-class

First we enter "tryChecked1" in the tryexception.jsp page. When you extend it you should override the execute method, which has this signature: Listing 13:The signature of the execute method in an Exception Handler public ActionForward execute(java.lang.Exceptionex, ExceptionConfigae, ActionMappingmapping, ActionFormformInstance, This gives us the same traceback as in Listing 11.

For showing all the messages you'll unfortunately have to use both of the tags above. So it's not something like forms validation errors, but more like errors that shouldn't occur with a properly set up environment. Here is the setup for my test: Spring 1.2.6 Struts 1.2.8 Spring Web Flow 1.0 RC1 snapshot (today). org.apache.struts.action.EXCEPTION:hansen.playground.MyException2: my Exception 2 All Attributes in session scope: org.apache.struts.action.LOCALE:en We can see that Struts has saved the exception using one of its global constants.

It's common to re-throw the exception, but if the error can be repaired partly or completely, then the whole situation could end up in a warning message sent to the user. By using chained exceptions this is easily accomplished. A special class of messages are "validation messages", which are sent out as the result of the validation of a form. If not, we simply return to the jsp-page.

Recap (1) To have a message displayed in the browser, you first use the ActionMessage(s) classes for storing message data. If specified, className must be a subclass of the default configuration bean ["org.apache.struts.config.ExceptionConfig"] handler Fully qualified Java class name for this exception handler. ["org.apache.struts.action.ExceptionHandler"] key The key to use with this But including the traceback in the page has at least two advantages: the user may phone right away to the help desk and pass (by voice or mail) the technical information. The old ActionError(s) If you've been using Struts before version 1.1 you probably know the ActionErrors and ActionError classes and the corresponding tag.

I presume this is the error you got: Code: javax.servlet.jsp.JspException: Cannot process ActionErrors instance of class org.apache.struts.action.ActionMessages org.apache.struts.util.RequestUtils.getActionErrors(RequestUtils.java:2007) org.apache.struts.taglib.html.ErrorsTag.doStartTag(ErrorsTag.java:186) org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp._jspx_meth_html_errors_0(org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp:194) org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp._jspx_meth_html_form_0(org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp:135) org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp._jspService(org.apache.jsp.WEB_002dINF.jsp.cardForm_jsp:94) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069) org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279) How to jump around the piano? Chapter 10 has an excellent chapter on Exception Handling, which also covers the new 1.1 features.Previous articles from JavaBoutique about Struts: - "Stepping through Jakarta Struts" - "Coding your second Jakarta I have a bunch of questions regarding RC1.

We'll first see how Struts, per default, handles exceptions and then continue by looking at how exception handling can be configured through the struts-config file. weblink Keith Comment Cancel Post Team Services Tools © Pivotal Software, Inc. The examples and ideas presented in this article will hopefully help you simplify the decision process. Hansen Introduction This article is about Jakarta Struts 1.1, the most popular framework for building Java servlet applications.

Trained support people might recognize the error right away, and thus give immediate help to the user.if the user has seen the error before and have had some advice of what and the validate method called. Using chained exceptions An exception typically occurs in a method in a "calling chain" initiated by the Action class. navigate here We can also find a pointer to the message resources in the Globals class, and if we want to handle several languages we should also pull out the "locale".

Instead of having almost the same code replicated in every Action class you can now move this code to the ExceptionHandler. One of the new, useful features in 1.1 is the possibility to specify exception handling in the Struts config file. Where should I put the flowId?

Thanks, Keith Comment Cancel Post Keith Donald Web App Development Lead Spring Team Join Date: Aug 2004 Posts: 2794 Keith Donald Core Spring Development Team #6 Jan 26th, 2006, 12:45 PM

Please contact support". public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) { ....... Do you see anything we're doing wrong there? The new ActionMessages and ActionMessage classes and tag are meant to replace these.

scope The context ("request" or "session") that is used to access the ActionError object [org.apache.struts.action.ActionError] for this exception. Markus Comment Cancel Post Keith Donald Web App Development Lead Spring Team Join Date: Aug 2004 Posts: 2794 Keith Donald Core Spring Development Team #10 Jan 26th, 2006, 05:36 PM Well, In PR3 we had the following code in the SWF validator to put a message into the global message space Code: errors.reject("org.apache.struts.action.GLOBAL_MESSAGE","error.someKey"); and could use this code in the jsp to his comment is here In the struts-config.xml the 1st mapping to this page i say validate="false" but for the next mapping i say validate="true" SO when the 1st URL is typed in the browser address

So your problem is resolved now--so it seems there is no issue with you. A good workman is known by his tools. Since the message is going to be displayed in a browser, it will have to be inserted in some way in a jsp-page. Keith Comment Cancel Post jocsch Member Join Date: Nov 2004 Posts: 62 #4 Jan 26th, 2006, 05:48 AM Hi Keith, thanks, that did the trick.

To make it simple here's some code for a jsp-page that peeks into the ActionMessage objects: Listing 5:The inspectmessages.jsp page . .<%@ page import="java.util.*" %><%@ page import="org.apache.struts.*" %><%@ page import="org.apache.struts.util.*" %> As you can see both checked and unchecked exceptions are in the list. Powered by Blogger. Platform Case Studies and Docs Subscription Services Request a Demo Marketplace Apps Downloads Company Press Releases Careers Contact Us 1400 Montefino Avenue Diamond Bar, CA 91765 USA +1-877-LIFERAY Powered by Liferay

It's also necessary since we want to move Java code away from error.jsp. Thanks, Gayatri Marc Peabody pie sneak Sheriff Posts: 4727 I like... Posted by jianming Chen at 2:32 PM Post a Comment Newer Post Older Post Home Subscribe to: Post Comments (Atom) Subscribe this blog.. In a real production system you'd have to give a friendly message, format it nicely using your style sheets, and tell the user how to proceed.

The reason is that the tag forced you to place HTML in the message resource file, which is not nice. Try MarkMail. Search MarkMail for "cvs commit: jakarta-struts/src/share/org/apache/struts/util LocalStrings.propert". Date: 15 May 2003 23:28:06 -0000 From: [email protected] Subject: cvs commit: jakarta-struts/src/share/org/apache/struts/util LocalStrings.properties dgraham 2003/05/15 16:28:06 Modified: src/share/org/apache/struts/util LocalStrings.properties Log: Instead you give a key to the Struts message resource file (also called "the application property file"). In Java such errors are typically handled by throwing an exception, but they could of course be handled in other ways, for example by having a method returning parameters that describe

You might have other useful information stored in session or request scope that could be written to the log.you might want to inform of the error through other channels, e.g. It could be a database access that fails because you've supplied an incorrect password. Revision Changes Path 1.8 +17 -2 jakarta-struts/src/share/org/apache/struts/util/LocalStrings.properties Index: LocalStrings.properties =================================================================== RCS file: /home/cvs/jakarta-struts/src/share/org/apache/struts/util/LocalStrings.properties,v retrieving revision 1.7 retrieving revision 1.8 diff -u -r1.7 -r1.8 --- LocalStrings.properties 20 Jan 2003 12:43:44 -0000 1.7 If you're interested in more information on how to best use chained exception, and how you produce a nicer traceback, I recommend reading the article "Using Chained Exceptions in JDK 1.4".

Struts ActionMessages and ActionErrors Install Perl module from CPAN How to boot up to single mode from GRUB ► February (2) ► January (3) ► 2008 (25) ► December (2) ► the error.jsp page, where you can inform the user of the error, and how he or she can proceed. Comment Cancel Post jocsch Member Join Date: Nov 2004 Posts: 62 #9 Jan 26th, 2006, 04:17 PM OK. How difficult is it to practically detect a forgery in a cryptosystem?