Kevin,
Thank you! Adding the three MQ JARs to my webApplication/WEB-INF/lib folder
did the trick. Who'd a thunk it?
/\/\ark /\/.
>From: [EMAIL PROTECTED]
>Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
>Subject: Re: ActionServlet and NoClassDefFoundErrors
>Date: Wed, 17 Apr 2002 16:42:10 -0400
>
>
>
>
>Forget the system classpath.
>
>Are the classes available:
>
> - in a jar file such as:
>webapp\myWebApp\WEB-INF\lib\MyMQClasses.jar
> - or down an exploded path such as:
>webapp\myWebApp\WEB-INF\com\path\to\mqclassses
>
>I'd check the specifics how your app server manages CLASSPATH, but I'll bet
>if you put the 3rd party files in one of the above two areas, it will work.
>
>FWIW _
>Kevin
>
>
>
>
>
>
>"Struts Developer" <[EMAIL PROTECTED]> on 04/17/2002 04:48:04
>PM
>
>Please respond to "Struts Users Mailing List"
> <[EMAIL PROTECTED]>
>
>To: [EMAIL PROTECTED]
>cc:
>Subject: ActionServlet and NoClassDefFoundErrors
>
>
>Greetings All,
>
>This is probably a dumb question, and being this close to Friday will
>generate short flippant answers, but here goes anyway
>
>I have a need to communicate via IBM MQSeries to a legacy application. This
>application has a listener that monitors the queue and posts events in the
>legacy application based on messages it reads from said queue.
>
>I have successfully tested putting messages on the queue from a java class.
>However when I try to call my MessageManager class from my Action class all
>I ever get is a NoClassDefFoundError.
>
>The MessageManager class imports all the necessary MQ packages, and it also
>catches all MQ exceptions and throws a MessageManagerException instead.
>I
>have a test driver that calls this class (independent of my ActionServlet),
>and I can successfully call it all day long.
>
>However, as soon as I try to make the call from my Action subclass I get
>the
>NoClassDefFoundError.
>
>Why, when I call my MessageManager from my test class, does it work, but
>when I call it from my Action class it fails?
>
>If anyone has any ideas please let me know. The source is posted below.
>Thanks in advance,
>Mark N.
>
>============================
>ForteMessageManager class
>============================
>package dhs.vcm.forte.messaging;
>
>
>import com.ibm.mq.*;
>
>
>/* There are three jar files required in the workspace
> com.ibm.mq.jar
> com.ibm.mq.iiop.jar
> com.ibm.mqbind.jar
> These should all be in the java/lib directory where MQ client is
>installed.
> The mqbind.jar file isn't used except for class definitions and was
>only
> found in the 5.2 installation of MQ Client.
>*/
>
>//----------------------------------------------------- ForteMessageManager
>public class ForteMessageManager {
>
>
>
>//----------------------------------------------------- putMessage
> public static void putMessage(String msg)
> throws ForteMessageException {
>
>
> try {
>
> System.out.println("ForteMessageManager.putMessage ...
>about
>to establish
>Connection pool") ;
> ForteMessageConnectionPool messagePool = new
>ForteMessageConnectionPool();
>
> // open the queue
> System.out.println("ForteMessageManager.putMessage ...
>about
>to open
>queue") ;
> MQQueue myQueue = messagePool.getConnection(1);
>
> // Define a simple MQSeries message, and put message text
> System.out.println("ForteMessageManager.putMessage ...
>about
>to define
>message ") ;
> MQMessage myMessage = new MQMessage();
> myMessage.writeUTF(msg);
>
> // specify the message options...
> System.out.println("ForteMessageManager.putMessage ...
>about
>to specify
>message options") ;
> MQPutMessageOptions pmo = new MQPutMessageOptions(); //
>accept the
>defaults, use MQPMO_DEFAULT constant
>
> // put the message on the queue
> System.out.println("ForteMessageManager.putMessage ...
>about
>to place
>message on queue") ;
> myQueue.put(myMessage,pmo);
>
> // Close the queue
> System.out.println("ForteMessageManager.putMessage ...
>about
>to close the
>queue") ;
> messagePool.releaseConnection(myQueue);
>
>
> } catch (ForteMessageException ex) {
> } catch (MQException ex) {
> ForteMessageException newEx = new
>ForteMessageException(ex.getMessage());
> newEx.setCompletionCode(ex.completionCode);
> newEx.setReasonCode(ex.reasonCode);
> throw newEx;
> } catch (java.io.IOException ex) {
> throw new ForteMessageException(ex.getMessage());
> }
>
>
> }
>
>
>
>//----------------------------------------------------- getMessage
> public static String getMessage()
> throws ForteMessageException {
>
>
> String msgText = null;
>
> try {
>
> ForteMessageConnectionPool messagePool = new
>ForteMessageConnectionPool();
>
> // open the queue
> MQQueue myQueue = messagePool.getConnection(1);
>
> // Define a MQSeries message buffer to receive the message
>into..
> MQMessage retrievedMessage = new MQMessage();
>
> // Set the get message options..
> MQGetMessageOptions gmo = new MQGetMessageOptions(); //
>accept the
>defaults, use MQGMO_DEFAULT constant
>
> // get the message off the queue..
> myQueue.get(retrievedMessage, gmo);
>
> // set the return value
> msgText = retrievedMessage.readUTF();
>
> // Close the queue
> messagePool.releaseConnection(myQueue);
>
>
> } catch (ForteMessageException ex) {
> } catch (MQException ex) {
> ForteMessageException newEx = new
>ForteMessageException(ex.getMessage());
> newEx.setCompletionCode(ex.completionCode);
> newEx.setReasonCode(ex.reasonCode);
> throw newEx;
> } catch (java.io.IOException ex) {
> throw new ForteMessageException(ex.getMessage());
> }
>
> return msgText;
>
>
> } // end of mqTest
>
>//----------------------------------------------------- ForteMessageManager
>- end
>}
>
>
>=============================
>Action Class sample
>=============================
>package dhs.vcm.vis.action;
>
>// -------------------------------------------------------------- Java
>Includes
>import java.io.IOException;
>import java.util.Hashtable;
>import java.util.Locale;
>import javax.servlet.RequestDispatcher;
>import javax.servlet.ServletException;
>import javax.servlet.http.HttpServletRequest;
>import javax.servlet.http.HttpSession;
>import javax.servlet.http.HttpServletResponse;
>
>// -------------------------------------------------------------- Struts
>Includes
>import org.apache.struts.action.ActionForm ;
>import org.apache.struts.action.ActionError;
>import org.apache.struts.action.ActionErrors;
>import org.apache.struts.action.ActionForward;
>import org.apache.struts.action.ActionMapping;
>import org.apache.struts.action.ActionServlet;
>import org.apache.struts.util.MessageResources;
>
>// -------------------------------------------------------------- DHS
>Imports
>import dhs.vcm.forte.messaging.* ;
>import dhs.vcm.vis.business.* ;
>import dhs.vcm.vis.entity.* ;
>import dhs.vcm.vis.form.* ;
>import dhs.vcm.vis.struts.action.VISAction ;
>import dhs.vcm.vis.util.* ;
>
>public class EnterVisitorActionDisplay extends VISAction {
>
> public ActionForward perform(
> ActionMapping mapping,
> ActionForm form,
> HttpServletRequest request,
> HttpServletResponse response)
> throws IOException, ServletException {
>
> writeToLog(" EnterVisitorActionDisplay : perform : entered") ;
>
> // Extract attributes we will need
> Locale locale = getLocale(request);
> MessageResources messages = getResources();
> HttpSession session = request.getSession();
>
> writeToLog(" EnterVisitorActionDisplay : perform : posting
>message") ;
>
> // Call Forte Message Manager passing it the request to display
>proper
>window
> messageToPost = "dhsv022910BeginRegisterVisitor" ;
> putMessageToQueue(messageToPost) ;
>
> writeToLog(" EnterVisitorActionDisplay : perform : leaving
>now") ;
>
> // Forward control to the specified success URI
> return (mapping.findForward("enterVisitor"));
> }
>
>}
>
>============================
>Action superclass
>============================
>package dhs.vcm.struts.action;
>
>// -------------------------------------------------------------- DHS
>imports
>import dhs.struts.action.DHSAction ;
>import dhs.vcm.forte.messaging.ForteMessageException ;
>import dhs.vcm.forte.messaging.ForteMessageManager ;
>
>import dhs.vcm.vis.business.ForteMessageProxy ;
>
>public class VCMAction extends dhs.struts.action.DHSAction {
>
> public void putMessageToQueue(
> String messageToPost) {
>
> writeToLog(" VCMAction.putMessageToQueue entered... about
>to post
>message") ;
>
> ForteMessageManager.putMessage(messageToPost) ;
>
> }
>
>
> public void getMessageFromQueue(){
>
> try {
> String myMsg = ForteMessageManager.getMessage();
> writeToLog(myMsg);
>
> } catch (ForteMessageException ex) {
> }
>
>
> }
>
>
>}
>
>
>
>
>
>
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