OnMessage() method not triggered

Question

I can able to send message to Queue but the onMessage() method not invoked.Please help me out resolve this problem.

Answer 1

yes ur correct but i didn't call start() method but i don' know where i need to call.here i have paste my code plz tell me where i need to call start method.
package mdb;
* Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
* This software is the proprietary information of Sun
* Microsystems, Inc. Use is subject to license terms.
import java.io.Serializable;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.ejb.CreateException;
import javax.naming.*;
import javax.jms.*;
public class SimpleMessageBean implements MessageDrivenBean,MessageListener {
private transient MessageDrivenContext mdc = null;
private Context context;
public SimpleMessageBean() {
System.out.println("In SimpleMessageBean.SimpleMessageBean()");
public void setMessageDrivenContext(MessageDrivenContext mdc) {
System.out.println("In "
+ "SimpleMessageBean.setMessageDrivenContext()");
     this.mdc = mdc;
public void ejbCreate() {
     System.out.println("In SimpleMessageBean.ejbCreate()");
public void onMessage(Message inMessage) {
TextMessage msg = null;
try {
if (inMessage instanceof TextMessage) {
msg = (TextMessage) inMessage;
System.out.println("MESSAGE BEAN: Message received: "
+ msg.getText());
} else {
System.out.println("Message of wrong type: "
+ inMessage.getClass().getName());
} catch (JMSException e) {
e.printStackTrace();
mdc.setRollbackOnly();
} catch (Throwable te) {
te.printStackTrace();
} // onMessage
public void ejbRemove() {
System.out.println("In SimpleMessageBean.remove()");
} // class
here is weblogic-ejb.xml
<!-- Sample MessageDriven bean Weblogic deployment descriptor -->
<weblogic-ejb-jar>
     <weblogic-enterprise-bean>
          <ejb-name>SimpleMessageBean</ejb-name>
          <message-driven-descriptor>
               <pool>
                    <max-beans-in-free-pool>2</max-beans-in-free-pool>
                    <initial-beans-in-free-pool>1</initial-beans-in-free-pool>
               </pool>          
               <destination-jndi-name>JNDIMDBQueue</destination-jndi-name>                    
               <connection-factory-jndi-name>MDBConnectionFactory</connection-factory-jndi-name>
     <!--connection-factory-jndi-name>weblogic.jms.MessageDrivenBeanConnectionFactory</connection-factory-jndi-name-->
               <initial-context-factory>weblogic.jndi.WLInitialContextFactory</initial-context-factory>
               <jms-polling-interval-seconds>10</jms-polling-interval-seconds>
               <jms-client-id>SimpleMessageBean</jms-client-id>
               <provider-url>t3://localhost:7001</provider-url>
               <trans-timeout-seconds>30</trans-timeout-seconds>
          </message-driven-descriptor>
          <jndi-name>SimpleMessageBean</jndi-name>     
     </weblogic-enterprise-bean>
</weblogic-ejb-jar>
here is the ejb-jar.xml
<?xml version="1.0"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
          <enterprise-beans>
               <message-driven>
                    <ejb-name>SimpleMessageBean</ejb-name>
               <ejb-class>mdb.SimpleMessageBean</ejb-class>
               <!--transaction-type>Bean</transaction-type-->
                    <transaction-type>Container</transaction-type>
                    <trans-attribute>Required</trans-attribute>
                    <acknowledge-mode>AUTO_ACKNOWLEDGE</acknowledge-mode>
                    <message-driven-destination>
                         <destination-type>javax.jms.Queue</destination-type>
                    </message-driven-destination>
               </message-driven>
          </enterprise-beans>
          <assembly-descriptor>
               <container-transaction>
                    <method>
                         <ejb-name>SimpleMessageBean</ejb-name>
                         <method-name>onMessage()</method-name>
                    </method>                    
               </container-transaction>
          </assembly-descriptor>
</ejb-jar>
i m very new to this program...plz help me