Creating a Message-Driven Bean in 10.1.3

I have been trying to create a Message-Driven Bean using the wizard but when I tried to deploy it to the stand-alone OC4J, I always got the null pointer exception:
Caused by: java.lang.NullPointerException
at com.evermind.server.ApplicationContext.unprivileged_lookup(ApplicationContext.java:227)
at com.evermind.server.ApplicationContext.lookup(ApplicationContext.java:199)
at com.evermind.server.ejb.deployment.EJBPackage.parseOrionAssemblyDescriptor(EJBPackage.java:973)
I am using EJB 2.1, the default jms/QueueConnectionFactory and jms/demoQueue.
I have been trying to find some simple examples and tutorials to do it but have been unsuccessful. Could somebody please point me to the right direction?

After spending many hours reading the documentation, I have finally created a MDB that works. The original problem was due to the wizard not updating the orion-ejb-jar.xml file. This I had to do manually.
I am now trying to use this MDB to process a JMS Web Service, created by using the Web Service wizard. I use the demoQueue for the send operation and demoTopic for the receive operation. I could only get this to work provided I generated a J2EE 1.3 (Oracle) Web Service. If I generated a J2EE 1.4 (JAX-RPC), I had two problems:
1. If I only filled in the send but not the receive details, an error saying cannot locate the JMS resource was returned when I called a send operation. I shouldn't need to fill in the receive details as I was only trying to issue a send call.
2. If I also filled in the receive details, then the send request hanged.
In both cases, I could not see my MDB being activated.
If I switched to J2EE 1.3 option, then both the send and receive operations would work.
Could anybody give me any advices?

Similar Messages

Message driven bean and JDBC Pool

          I am working with weblogic 7.0
          I have created a message driven bean the receives messages and store them in the
          database.
          for performance issue I have put the (SQL)Connection and a preparedStatement in
          the ejbCreate() method ...and I close them in the ejbRemove() method...but I notice
          that the ejbRemove dose not called ... even when I restart the weblogic7.0
          I notice also that when I deploy the the Message driven bean ...it consume a number
          of connections equals the number of instances created by weblogic.
          if I redeploy the message driven bean ...the weblogic consume anthor connections
          without free up the previous connections.
          thank you for any help


          Hi,
          EjbRemove will never be called for a message driven bean as it follows the lifecycle
          of a StatlessSession.
          http://e-docs.bea.com/wls/docs61/ejb/EJB_environment.html#1039510
          The container will call EJBRemove only when it gets a RemoteRuntimeException and
          has to recycle the bean.
          -Vimala Ranganathan
          "eyad" <[email protected]> wrote:
          >
          >I am working with weblogic 7.0
          >
          >I have created a message driven bean the receives messages and store
          >them in the
          >database.
          >for performance issue I have put the (SQL)Connection and a preparedStatement
          >in
          >the ejbCreate() method ...and I close them in the ejbRemove() method...but
          >I notice
          >that the ejbRemove dose not called ... even when I restart the weblogic7.0
          >
          >I notice also that when I deploy the the Message driven bean ...it consume
          >a number
          >of connections equals the number of instances created by weblogic.
          >if I redeploy the message driven bean ...the weblogic consume anthor
          >connections
          >without free up the previous connections.
          >thank you for any help
          >

Message Driven Bean (MDB) for AQ Queue cannot start

I am working on the creating a message driven bean in Managed OC4J 10.1.3.0 to consume messages from AQ Queue. I am using a Oracle AS generic JMS connector and a resource adapter to create a message listener for the MDB.
I am able to make successful connections to the AQ and also consume messages, but if i try to start the MDB using the Oracle Application Server Web Admin console, the MDB fails to start, i have to restart the entire OC4J instance to restart the MDB.
The error on the Admin Console says "Failed to start MDB. Please see log for details." , but the problem is nothing is written to the log file.
I have tried setting the logging level in web admin console to FINER but still no new errors are written to the log file. I have checked the opmn logs, instance logs as well the home logs.
Please help, since this issue will further help us decide whether we need to go with the implementation or not.

As far as I know XMLType JMS messages are not supported when using OJMS. They might be for OC4J 10.1.3, but I thought it's an AQ limitation rather than an OC4J one.. To be sure you might just log a TAR on Metalink.
hth,
Bastiaan

My problem in Weblogic and Message Driven Bean for Topic

Hello to all
I used this page (http://www.ecomputercoach.com/index.php/component/content/article/90-weblogic-jms-queue-setup.html?showall=1)
for setup JMS Server, Queue, Connection Factory on Weblogic Server
and I created a Message Driven Bean ,I used those Queue , and all things was OK
But I wanted to setup a Topic and use it in this manner
I created a Topic like previous steps for setup Queue
(http://www.ecomputercoach.com/index.php/component/content/article/90-weblogic-jms-queue-setup.html?showall=1)
Except in Step 3 ,I selected Topic instead of Queue
then I created a Message Driven Bean in JDeveloper , my Message Driven Bean is like this:
@MessageDriven(mappedName = "jndi.testTopic")
<p>
public class aliJMS1_MessageDrivenEJBBean implements MessageListener {
    public void onMessage(Message message) {
      if(message instanceof TextMessage ){
        TextMessage txtM=(TextMessage) message;
        try{
          System.out.println(txtM.getText());
        }catch(Exception ex){
          ex.printStackTrace();
</p>
When I deploy the Application , Weblogic shows me this error:
+<Aug 30, 2011 11:32:28 AM PDT> <Warning> <EJB> <BEA-010061> <The Message-Driven EJB: aliJMS1_MessageDrivenEJBBean is unable to connect to th+
e JMS destination: jndi.testTopic. The Error was:
+[EJB:011011]The Message-Driven EJB attempted to connect to the JMS destination with the JNDI name: jndi.testTopic. However, the object with+
the JNDI name: jndi.testTopic is not a JMS destination, or the destination found was of the wrong type (Topic or Queue).>
And when I send message to the topic The Message Dirven Bean dosen't work
But when I create an ordinary Java application like this (it uses that Tpoic) :
import java.io.*;
import java.util.*;
import javax.transaction.*;
import javax.naming.*;
import javax.jms.*;
public class TopicReceive implements MessageListener
    public final static String JNDI_FACTORY =
        "weblogic.jndi.WLInitialContextFactory";
    public final static String JMS_FACTORY =
        "jndi.testConnectionFactory";
    public final static String TOPIC = "jndi.testTopic";
    private TopicConnectionFactory tconFactory;
    private TopicConnection tcon;
    private TopicSession tsession;
    private TopicSubscriber tsubscriber;
    private Topic topic;
    private boolean quit = false;
    public void onMessage(Message msg) {
        try {
            String msgText;
            if (msg instanceof TextMessage) {
                msgText = ((TextMessage)msg).getText();
            } else {
                msgText = msg.toString();
            System.out.println("JMS Message Received: " + msgText);
            if (msgText.equalsIgnoreCase("quit")) {
                synchronized (this) {
                    quit = true;
                    this.notifyAll();
        } catch (JMSException jmse) {
            jmse.printStackTrace();
    public void init(Context ctx, String topicName) throws NamingException,
                                                           JMSException {
        tconFactory = (TopicConnectionFactory)ctx.lookup(JMS_FACTORY);
        tcon = tconFactory.createTopicConnection();
        tsession = tcon.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
        topic = (Topic)ctx.lookup(topicName);
        tsubscriber = tsession.createSubscriber(topic);
        tsubscriber.setMessageListener(this);
        tcon.start();
    public void close() throws JMSException {
        tsubscriber.close();
        tsession.close();
        tcon.close();
    public static void main(String[] args) throws Exception {
        InitialContext ic = getInitialContext("t3://127.0.0.1:7001");
        TopicReceive tr = new TopicReceive();
        tr.init(ic, TOPIC);
        System.out.println("JMS Ready To Receive Messages (To quit, send a \"quit\" message).");
        synchronized (tr) {
            while (!tr.quit) {
                try {
                    tr.wait();
                } catch (InterruptedException ie) {
        tr.close();
    private static InitialContext getInitialContext(String url) throws NamingException {
        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY, JNDI_FACTORY);
        env.put(Context.PROVIDER_URL, url);
        env.put("weblogic.jndi.createIntermediateContexts", "true");
        return new InitialContext(env);
It's OK and shows messages When I send message to the Topic
Now I want know why the Message Driven Bean doesn't work for those Topic
I want create a Message Driven Bean for Topic in the same way I created for Queue
I don't know what is problem , please advice me
Thanks

Could you try adding a activationconfig to the message-driven bean, for example,
@MessageDriven(mappedName = "jndi.testTopic", activationConfig = {
        @ActivationConfigProperty(propertyName = "destinationName", propertyValue = "jndi.testTopic"),
        @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic")
public class aliJMS1_MessageDrivenEJBBean implements MessageListener {
    public void onMessage(Message message) {
      if(message instanceof TextMessage ){
        TextMessage txtM=(TextMessage) message;
        try{
          System.out.println(txtM.getText());
        }catch(Exception ex){
          ex.printStackTrace();
}

Dynamic queue listener in Message driven bean

Hi all
I wonder if exists a way for creating a message driven bean that reads messages from a queue defined on fly.
I mean I'd like to create an mdb that read from queue ,where the queue name is defined in a data base table .
Hope to be clear.
Thanks in advance

Yes, you can use either a queue or a topic to drive an MDB.
There are a number of discussion threads related to MDB's in
weblogic.develoepr.interest.jms.
"Herman Lam" <[email protected]> wrote in message
news:3ac891da$[email protected]..
>
Hi Folk:
Does anyone know whether the Weblogic 6.0 EJB 2.0 Message Driven Bean cansupport
queue event for the OnMessage( javax.jms.Message messagenmae)
callback method or does it only support publisher/subscriber event ?
Best Regards
Herman

Jndi-name in Message Driven Bean

Hi
I have successfully created the ejb jar file for deployment using sun one studio . I created the message driven bean and I right clicked on the ejb and used the customize option to set the bean properties . But my problem is that the jndi-name in the <ejb> tags takes the value jms/(ejbname) instead of jms/(queuename) . I am attaching the xml file with this . Can any one tell how to set the jndi-name to queue value using studio
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Sun ONE Application Server 7.0 EJB 2.0//EN" "http://www.sun.com/software/sunone/appserver/dtds/sun-ejb-jar_2_0-0.dtd">
<sun-ejb-jar>
<enterprise-beans>
<name>ejb</name>
<ejb>
<ejb-name>Suneesh</ejb-name>
<jndi-name>jms/Suneesh</jndi-name> <resource-ref>
<res-ref-name>QueueConnectionFactory</res-ref-name>
<jndi-name>jms/QueueConnectionFactory</jndi-name>
</resource-ref>
<resource-env-ref>
<resource-env-ref-name>TestQueue</resource-env-ref-name>
<jndi-name>jms/TestQueue</jndi-name>
</resource-env-ref>
<pass-by-reference>false</pass-by-reference>
</ejb>
<ejb>
<ejb-name>Suneesh1</ejb-name>
<jndi-name>jms/Suneesh1</jndi-name>
<resource-ref>
<res-ref-name>QueueConnectionFactory</res-ref-name>
<jndi-name>jms/QueueConnectionFactory</jndi-name>
</resource-ref>
<resource-env-ref>
<resource-env-ref-name>TestQueue1</resource-env-ref-name>
<jndi-name>jms/TestQueue1</jndi-name>
</resource-env-ref>
<pass-by-reference>false</pass-by-reference>
</ejb>
</enterprise-beans>
</sun-ejb-jar>

Hi Bhagya,
Thanks for your response. I think from EJB container we can call Local EJBs with the full JNDI name. The session facade bean which is being called is a remote bean. From the session facade bean I am calling a local stateless session bean for database access. I am getting the reference of the local EJB from my session facade bean with full JNDI name "java:comp/env/ejb/EJBJNDIName". It is working fine with out any problem. My servicelocator is able to provide me the reference of the local EJB from the session facade remote bean with Full JNDI name. I am only having this problem calling from the MDB. I am really not sure whether what is causing it?
Thanks
Amit

"Message Driven Bean" doesn't work with Sun App Server

Hello all,
i have a little bit problems, running a simple "Message Driven Bean" under the Sun App Server. The deployment of it works fine, but after starting the SUN App Server i get the following error message:
An error occurred during the message-driven beancontainer initialization at runtime. The most common cause for this is that the physical resource(e.g. Queue) from which the message-driven bean is consuming either does not exist or has been configured incorrectly. Another common error is that the message-driven bean implementation class does not correctly implement the required javax.ejb.MessageBean or MessageListener interfaces.
Has anybody a workaround for this problem?
The queue seems to be correctly installed. A simple client programm from the Sun Tutorial (Consumer & Producer) works fine without any Errors or Exceptions.
I am a little bit confused, because the queue seems to work with the client programms but not with a MDB running on the SUN App Server.
Thanks for you help!
Greetings
Manuel

Hello Mr Manuel!
could you plz help me with the steps for creating a message driven bean using netbeans ver 5.0(with Sun Java� System Application Server Platform Edition 8.2 )
I just know how to work with Session beans & Entity Bean, and am try to learn to work on Message Driven Beans too. there are no proper tutorials where i can find steps for creating these..
I need the steps from the scratch.,like creating QueueConnection Factory & Destination etc..
It will be gr8 if you can help me with this at the earliest .
Thank you
Bye

Create EJB 3.0 Message Driven Bean on a Oracle JMS (AQ)

Hi, I need to develop a EJB 3.0 Message Driven Bean. The MDB has to work on a Oracle AQ using Oracle JMS. Is there any how-to document giving an example about this issue. Can you give an example how to create the JMS destination in OC4J (how to configure the Oracle JMS AQ in OC4j), issue the JMS destination via annotions (resource injection) in the MDB. Please give me a working example of the MDB and a test client to produce a message. Regards, Arjan Jorritsma

Check your ejb-jar.xml and see if it has the version of "2.1" there...
If the application was depending upon EJB 3.0 annotations but it had a ejb-jar.xml that had version set to "2.1" and there was no oracle specific descriptor (orion-ejb-jar.xml) to designate it use the resource adapter; It would expect JMS destination and connection factory that is required for a JMS-MDB set in the ejb-jar.xml. So try to change the ejb-jar.xml to update the version to "3.0", OC4J would have parsed the annotation and combined the metadata with ejb-jar.xml and it would work.
-Frances

Message driven bean: resource not created

Hi,
I'm having trouble deploying a simple test app that I've created (in App Server Platform Edition 8.0). It contains a servlet, that posts messages to a queue, and which appears to work fine. There is also a message-driven bean that receives these messages, but it will not deploy as is. I would be grateful for any assistance in working out why. Apologies if I'm missing something obvious, but the technology is quite new to me.
I get the following error in the server log -
[#|2004-07-14T14:03:49.640+0100|SEVERE|sun-appserver-pe8.0|javax.enterprise.system.container.ejb|_ThreadID=12;|EJB5090: Exception in creating EJB container [com.sun.enterprise.connectors.ConnectorRuntimeException: JMS resource not created : joeMDB]|#]
[#|2004-07-14T14:03:49.656+0100|SEVERE|sun-appserver-pe8.0|javax.enterprise.system.container.ejb|_ThreadID=12;|appId=mdbtest moduleName=ejb-jar-ic_jar ejbName=joeMDB|#]
[#|2004-07-14T14:03:49.656+0100|SEVERE|sun-appserver-pe8.0|javax.enterprise.system.core.classloading|_ThreadID=12;|LDR5004: UnExpected error occured while creating ejb container
com.sun.enterprise.connectors.ConnectorRuntimeException: JMS resource not created : joeMDB
     at com.sun.enterprise.connectors.system.ActiveJmsResourceAdapter.getPhysicalDestinationFromConfiguration(ActiveJmsResourceAdapter.java:296)
     at com.sun.enterprise.connectors.system.ActiveJmsResourceAdapter.updateMDBRuntimeInfo(ActiveJmsResourceAdapter.java:232)
     at com.sun.enterprise.connectors.inflow.ConnectorMessageBeanClient.setup(ConnectorMessageBeanClient.java:139)
     at com.sun.ejb.containers.MessageBeanContainer.<init>(MessageBeanContainer.java:189)
- which I can't find referenced in any other forum post. The relevant deployment descriptors are as follows -
ejb-jar.xml -
<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee" version="2.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd">
<display-name>mdbJar</display-name>
<enterprise-beans>
<message-driven>
<ejb-name>joeMDB</ejb-name>
<ejb-class>joeMDB</ejb-class>
<messaging-type>javax.jms.MessageListener</messaging-type>
<transaction-type>Container</transaction-type>
<message-destination-type>javax.jms.Queue</message-destination-type>
<message-destination-link>jms/JoeDestQueue</message-destination-link>
<message-destination-ref>
<message-destination-ref-name>jmsJoeDestQueue</message-destination-ref-name>
<message-destination-type>javax.jms.Queue</message-destination-type>
<message-destination-usage>Consumes</message-destination-usage>
<message-destination-link>jms/JoeDestQueue</message-destination-link>
</message-destination-ref>
</message-driven>
</enterprise-beans>
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>joeMDB</ejb-name>
<method-name>onMessage</method-name>
<method-params>
<method-param>javax.jms.Message</method-param>
</method-params>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
<message-destination>
<message-destination-name>jms/JoeDestQueue</message-destination-name>
</message-destination>
</assembly-descriptor>
</ejb-jar>
sun-ejb-jar.xml -
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 8.0 EJB 2.1//EN" "http://www.sun.com/software/appserver/dtds/sun-ejb-jar_2_1-0.dtd">
<sun-ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee">
<enterprise-beans>
<unique-id>0</unique-id>
<ejb>
<ejb-name>joeMDB</ejb-name>
<jndi-name>joeMDB</jndi-name>
<pass-by-reference>false</pass-by-reference>
<mdb-connection-factory>
<jndi-name>jms/joeFactory</jndi-name>
</mdb-connection-factory>
<jms-max-messages-load>1</jms-max-messages-load>
<is-read-only-bean>false</is-read-only-bean>
<refresh-period-in-seconds>-1</refresh-period-in-seconds>
<cmt-timeout-in-seconds>0</cmt-timeout-in-seconds>
<gen-classes/>
<bean-pool>
<steady-pool-size>-1</steady-pool-size>
<resize-quantity>-1</resize-quantity>
<max-pool-size>-1</max-pool-size>
<pool-idle-timeout-in-seconds>-1</pool-idle-timeout-in-seconds>
<max-wait-time-in-millis>-1</max-wait-time-in-millis>
</bean-pool>
</ejb>
<message-destination>
<message-destination-name>jms/JoeDestQueue</message-destination-name>
<jndi-name>jms/JoeDestQueue</jndi-name>
</message-destination>
</enterprise-beans>
</sun-ejb-jar>
Thanks,
Joe

Hi, Joe,
The message says that
JMS resource not created : joeMDB
The command to add the missing Queue:
asadmin create-jms-resource user admin restype javax.jms.Queue JoeDestQueue
Please note:
in your sun-ejb-jar.xml, the real JNDI name for the Queue is JoeDestQueue.
Double check the namings for the Queue in both ejb-jar.xml and sun-ejb-jar.xml.
You only need two names for one Queue: one is for JNDI, one is for reference.
_Dianne

Creating Message Driven Bean

When will JDeveloper have support for Message Driven Beans? A search of the JDeveloper help on the subject found nothing.
In the meantime, is there a work-around that you can suggest for working with Message-Driven Beans in JDeveloper?
Thanks in advance for your help.

Oracle9i JDeveloper (9.0.3) which is the next release will have support for EJB 2.0 including Message Driven Beans.
This release is slated for this summer.
raghu
JDev Team

How to transaction in the message driven bean?

          hello
          i write a message driven bean,that monitor the weblogic message queue,when a "Order"
          object is witten to the queue,the mdb get it and write it to a entity bean "Orderinfo".all
          of above logic is within the "onMessage" method of the mdb.
          i want to encapsulate the flow in a transaction,see my code snippet of the onMessage
          method:
          ObjectMessage objMsg = (ObjectMessage) msg;
          OrderVO orderVO = (OrderVO) objMsg.getObject();
          System.out.println(orderVO.booklist);
          OrderinfoHome orderinfoHome = (OrderinfoHome) ctx.lookup(
          "java:/comp/env/orderinfo");
          Orderinfo orderinfo = orderinfoHome.create(orderVO.orderID);
          orderinfo.setAddress(orderVO.address);
          orderinfo.setCustname(orderVO.custName);
          orderinfo.setEmail(orderVO.email);
          orderinfo.setBooklist(orderVO.booklist);
          orderinfo.setPrice(new BigDecimal(orderVO.price));
          and deploy descriptor snippet(ejb-jar.xml):
          <assembly-descriptor>
          <container-transaction>
          <method>
          <ejb-name>orderMDB</ejb-name>
          <method-name>*</method-name>
          </method>
          <trans-attribute>Required</trans-attribute>
          </container-transaction>
          </assembly-descriptor>
          i think during this transaction,there are two action:geting the object from the
          queue and saving it to entity bean.in order to test the transaction,i modify the
          jndi name of entity bean in the code to a WRONG one.redeploy my program,and send
          a message to the queue,the mdb is activated,then the exception is thrown because
          of the wrong jndi name.after that,i check the message queue,find that it is empty.why?i
          think if the second action of the transaction is fail,the transaction should roll
          back,the message should be send BACK to the queue.
          i also ty to use the "javax.transaction.UserTransaction" in the onMessage method,but
          the follwing exception is thrown:
          javax.transaction.NotSupportedException: Another transaction is associated with
          this thread.................................
          who can help me,if any wrong with me,and how to use the transaction with the message
          driven bean?
          thank you.


The transaction should rollback if the MDB throws an
          exception. Try changing your MDB code to
          call "setRollbackOnly()" on the EJB
          context (instead of throwing an exception) to see
          if that works. If calling "setRollbackOnly()" fixes
          the problem - then please contact customer support
          and report a bug.
          zbcong wrote:
          > hello
          >
          > i write a message driven bean,that monitor the weblogic message queue,when a "Order"
          > object is witten to the queue,the mdb get it and write it to a entity bean "Orderinfo".all
          > of above logic is within the "onMessage" method of the mdb.
          > i want to encapsulate the flow in a transaction,see my code snippet of the onMessage
          > method:
          >
          >
          > ObjectMessage objMsg = (ObjectMessage) msg;
          > OrderVO orderVO = (OrderVO) objMsg.getObject();
          > System.out.println(orderVO.booklist);
          > OrderinfoHome orderinfoHome = (OrderinfoHome) ctx.lookup(
          > "java:/comp/env/orderinfo");
          > Orderinfo orderinfo = orderinfoHome.create(orderVO.orderID);
          > orderinfo.setAddress(orderVO.address);
          > orderinfo.setCustname(orderVO.custName);
          > orderinfo.setEmail(orderVO.email);
          > orderinfo.setBooklist(orderVO.booklist);
          > orderinfo.setPrice(new BigDecimal(orderVO.price));
          >
          >
          > and deploy descriptor snippet(ejb-jar.xml):
          >
          >
          > <assembly-descriptor>
          > ............
          > ...........
          >
          > <container-transaction>
          > <method>
          > <ejb-name>orderMDB</ejb-name>
          > <method-name>*</method-name>
          > </method>
          > <trans-attribute>Required</trans-attribute>
          > </container-transaction>
          > </assembly-descriptor>
          >
          >
          > i think during this transaction,there are two action:geting the object from the
          > queue and saving it to entity bean.in order to test the transaction,i modify the
          > jndi name of entity bean in the code to a WRONG one.redeploy my program,and send
          > a message to the queue,the mdb is activated,then the exception is thrown because
          > of the wrong jndi name.after that,i check the message queue,find that it is empty.why?i
          > think if the second action of the transaction is fail,the transaction should roll
          > back,the message should be send BACK to the queue.
          >
          > i also ty to use the "javax.transaction.UserTransaction" in the onMessage method,but
          > the follwing exception is thrown:
          >
          > javax.transaction.NotSupportedException: Another transaction is associated with
          > this thread.................................
          >
          > who can help me,if any wrong with me,and how to use the transaction with the message
          > driven bean?
          >
          > thank you.
          >
          >

Message Driven Bean and transaction handling

We are using container managed transactions with MDB's running on OC4J version 10.1.2. We have two database serveres, both running Oracle 10g.
The MDB consume messages from the AQ-database through JMS (connected to a JDBC datasource registered as "jdbc/OracleAQDS").
The MDB onMessage() code update the second database, using a JDBC datasource registered as "jdbc/OracleDBDS".
We need atomic behaviour - if the MDB enforce a roll-back we want the updates aginst the second database to be rolled-back as well.
(1) Should we use XA-datasources since AQ and DB runs on two different servers or do the OC4J container "magically" provide two-phase-commit for us?
(2) If the MDB does a roll-back we would like to add an error record to a database table. Can we configure a third datasource and prevent if from beeing part of the container managed MDB roll-back?
(3) When the MDB force a roll-back, is there some way for us to override the retry-delay in our Java code? If we catch certain errors during processing in onMessage we know that it is not necessary to retry for at least one hour (while less severe errors should be retried in just seconds).

{color:#008000}Hi Friends,
Thought of updating the answers for my questions in case somebody else would find it helpful.
{color}
{color:#999999}{color:#00ccff}I'm trying to make message driven bean and use the OnListener method.
But since I'm doing this for the first time I have very limited knowledge.
The following are my doubts :
1. Should I have a main function while using the MDB?{color}
{color:#008000} There is no need for any main function.{color}
{color:#00ccff}2. Is it mandatory to have JNDI setup done?
{color} {color}{color:#008000} There is no need for any JNDI setup done. But you need to configure the details on the
Websphere by creating valid entries inside Resources namely -
Queue Connection Factory, Queues and Listener Ports under the server.
Thanks,
Arun Prithviraj{color}

Can you set isolation levels of message-driven bean transactions?

The problem: I have 3 different message-driven beans which each get a different type of message, except for a field that is common to all. That field is used as the primary key of an entity object. The message-driven beans configured to use a container managed transaction. Each message-driven bean, in processing the message, first does a lookup by primary key to see if the object associated with the key exists, and if it does not, it requests the entity's home object to create it. After that, they do further processing. The problem is that sometimes all the beans simultaneously get a message, resulting in each bean checking for the entity object at about the same time, and if they fail to find it (because none of them has created it yet), each creates an object, all with the same primary key. This is not caught until the beans start to complete their onMessage method, which I believe results in the container committing the transaction. One of the transactions will be committed successfully, while the other two will fail, get rolled back, and then be retried with the same message. The second time through, the other beans will find the entity object (since it has been created and committed) and they will complete correctly. In the end, they right thing occurs, except that there is a troubling exception or 2 in the log telling about the constraint violation (with the primary key) and the rollback. If it was just me, that would be fine, but our customer does not like to see exceptions in the log; that indicates to him that something is wrong.
So, I am looking for someway to make sure that the actions of the message-driven beans are serialized. One suggestion from a colleague was to set the isolation level of the transactions being used by the container in processing the message-driven beans' onMessage method. However, the documentation does not mention any way to do this for a message-driven bean. Suggestions?
Is the use of a UserTransaction a better way to do this? If I acquire a UserTransaction within the onMessage method of a message-driven bean, can I set its isolation level? How would this work? When I get a UserTransaction, does each client get a different transaction, or do they all get the same one?

(1) The WebLogic JMS "unit-of-order" feature is a heavily adopted feature that was specifically designed to handle similar use cases - see the JMS developer guide for extensive documentation. In your use case, if "key" is used to define UOO, then there's no limit on the number of keys that can be processed concurrently, but messages for any particular key will be processed single-threaded in the order in which they were first submitted.
Note that if you're using distributed destinations, the UOO feature is still fully supported - but the developer and/or administrator needs to decide whether to configure the destination to use "hash" or "path service" based routing (the JMS UOO edoc outlines the trade-offs).
(2) Another alternative is to use a single MDB with max-beans-free-pool that processes all three types (as the other poster suggested). I think this assumes all MDBs run on the same JVM.
(3) Another alternative is to use multiple queues, with a single MDB on each Q. Where some sort of hash algorithm is used to determine which Q is for the key. This approach is a "hand-coded" variant of the approach in (1) with "hash" based routing enabled...
(4) If all MDBs actually do run in the same JVM, a third alternative is to use code the application to use a common lock to protect each key, eg, something like:
// assume MyLock is simply a class with a "reference counter"
// assume some global "staticHM" hash map that is all MDBs can access
onMessage() {
MyLock lock = null;
key= msg.getKey();
synchronized(staticHM) {
lock = staticHM.get();
if (lock = null) {
lock = new lock();
staticHM.put(key, new lock());
lock.incRefCount();
try {
synchronized(lock) {
// only one onMessage will be able to lock a particular key at a time
do your work;
} finally {
synchronized(staticHT) {
if (lock.defRefCount() == 0) staticHM.remove(lock);
if (lock = null) staticHM.put(key);
If multiple threads get a message with the same key, then only one thread at a time will work on the key.
Hope this helps,
Tom

WebLogic 10 and EJB 3.0 for Message Driven Bean

Hi,
I am trying to deploy Message Driven Bean using EJB3.0 on weblogic 10. I am using annotations and don't want to use deployment descriptors.
The Bean class:
CalculatorBean.java
import javax.ejb.*;
import javax.jms.*;
import java.sql.Timestamp;
import java.util.StringTokenizer;
@MessageDriven(activationConfig =
@ActivationConfigProperty(propertyName="destinationType",
propertyValue="javax.jms.Queue"),
@ActivationConfigProperty(propertyName="destination",
propertyValue="queue/mdb")
public class CalculatorBean implements MessageListener {
public void onMessage (Message msg) {
TextMessage tmsg=null;
try {
if (msg instanceof TextMessage) {
tmsg = (TextMessage) msg;
System.out.println
("MESSAGE BEAN1: Message received: "
+ tmsg.getText());
} else {
System.out.println
("Message of wrong type1: "
+ msg.getClass().getName());
catch (JMSException e) {
e.printStackTrace();
catch (Throwable te) {
te.printStackTrace();
My client:
import javax.naming.*;
import javax.naming.InitialContext;
import java.text.*;
import javax.jms.*;
public class MsgClient {
public static void main(String args[])
QueueConnection cnn=null;
QueueSender sender=null;
QueueSession sess=null;
Queue queue=null;
try {
java.util.Properties p = new java.util.Properties();
p.put("java.naming.factory.initial","weblogic.jndi.WLInitialContextFactory");
p.put("java.naming.provider.url","t3://10.6.74.79:7001");
Context ctx=new InitialContext(p);
//InitialContext ctx=new InitialContext(p);
queue = (Queue)ctx.lookup("queue/mdb");
QueueConnectionFactory factory = (QueueConnectionFactory)ctx.lookup("ConnectionFactory");
cnn = factory.createQueueConnection();
sess= cnn.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
sender = sess.createSender(queue);
TextMessage message = sess.createTextMessage();
message.setText("This is message by Gurumurthy" );
System.out.println("Sending message: " +message.getText());
sender.send(message);
sess.close();
catch (Exception e)
e.printStackTrace();
I am compiling and creating jar file for this class. Then I am creating a .ear file for this.
The meta-inf/application.xml contains the following:
<?xml version="1.0" encoding="UTF-8"?>
<application xmlns="http://java.sun.com/xml/ns/j2ee" version="1.4"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com /xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
<display-name>MDBWorking1</display-name>
<description>Application description</description>
<module>
<ejb>MDBWorking1.jar</ejb>
</module>
</application>
I don't want to use deployment descriptor (ejb-jar.xml or weblogic-ejb-jar-xml), because I want to utilize the annotation feature of EJB3.0
So, after creating the .ear file for this, and try to deploy on weblogic 10, I get the following error:
An error occurred during activation of changes, please see the log for details.
Exception preparing module: EJBModule(MDBWorking1.jar) Unable to deploy EJB: CalculatorBean from MDBWorking1.jar: [EJB:011113]Error: The Message Driven Bean 'CalculatorBean(Application: MDBWorking1, EJBComponent: MDBWorking1.jar)', does not have a message destination configured. The message destination must be set using a message-destination-link, destination-resource-link, destination-jndi-name or a resource-adapter-jndi-name.
Substituted for missing class [EJB - 11113]Error: The Message Driven Bean 'CalculatorBean(Application: MDBWorking1, EJBComponent: MDBWorking1.jar)', does not have a message destination configured. The message destination must be set using a message-destination-link, destination-resource-link, destination-jndi-name or a resource-adapter-jndi-name.
How to solve this?
Note:
I don't want to use Deployment Descriptor and all I want to use is EJB3.0's annotation feature.
Thanks,
Guru

Dear gurubbc,
I don't know if it still matters to you but you can use the javax.ejb.MessageDriven annotation to point your bean on your queue. I had the same issue like you but i could not solve it properly by switchihg to weblogic.ejb.MessageDriven.
Use the following annotation and it should work out:
@MessageDriven
(mappedName = "queue/mdb",
name = "CalculatorBean",
activationConfig = {
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
Here you can see that the mappedName is the JNDI name of the queue you are trying to connect to. The name is the name for your Bean, and the only property passed is the destination type.
Hope this helps.
Cheers,
Istvan

JBoss message driven bean calling a session bean

Hi guys, can you please help me? I want my mdb to call my session bean....can you provide me some examples of ejb-jar.xml and jboss.xml with regards to this configuration....thanks...im creating my deployment descriptors manually

Here is a little example, I hope it will help you.
ejb-jar.xml
=============================================
<?xml version="1.0" encoding="UTF-8"?>
<!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>

<session >
<display-name>TestSessionEJB</display-name>
<ejb-name>TestSession</ejb-name>
<home>mdbtest.interfaces.TestSessionHome</home>
<remote>mdbtest.interfaces.TestSession</remote>
<local-home>mdbtest.interfaces.TestSessionLocalHome</local-home>
<local>mdbtest.interfaces.TestSessionLocal</local>
<ejb-class>mdbtest.session.TestSessionEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
... </session>

<message-driven >
<description><![CDATA[]]></description>
<display-name>TestMessageEJB</display-name>
<ejb-name>TestMessage</ejb-name>
<ejb-class>mdbtest.message.TestMessageEJB</ejb-class>
<transaction-type>Container</transaction-type>
<message-selector></message-selector>
<acknowledge-mode>Auto-acknowledge</acknowledge-mode>
<message-driven-destination>
<destination-type>javax.jms.Queue</destination-type>
<subscription-durability>NonDurable</subscription-durability>
</message-driven-destination>
<ejb-local-ref >
<ejb-ref-name>ejb/TestEjb</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<local-home>mdbtest.interfaces.TestSessionLocalHome</local-home>
<local>mdbtest.interfaces.TestSessionLocal</local>
<ejb-link>TestSession</ejb-link>
</ejb-local-ref>
</message-driven>
</enterprise-beans>
</ejb-jar>
jboss.xml:
=============================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 3.0//EN" "http://www.jboss.org/j2ee/dtd/jboss_3_0.dtd">
<jboss>
<enterprise-beans>
<session>
<ejb-name>TestSession</ejb-name>
<jndi-name>ejb/MdbTest/TestSession</jndi-name>
<local-jndi-name>TestSessionLocal</local-jndi-name>
<configuration-name>Standard Stateless SessionBean</configuration-name>
</session>
<message-driven>
<ejb-name>TestMessage</ejb-name>
<destination-jndi-name>queue/MyTestQueue</destination-jndi-name>
<configuration-name>Standard Message Driven Bean</configuration-name>
</message-driven>
</enterprise-beans>
<resource-managers>
</resource-managers>
</jboss>

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