U S I N G   T H E   J M S   A P I  

Using Message Driven Beans (MDB) with Jboss 

A message driven bean is JMS message listner that is managed by a J2EE container.  An 

example of a MDB is show in Listing 11 5, the source code for a simple MDB. 

Listing 11 5, the source code for a simple MDB 

package example.beans; 

import javax.ejb.MessageDrivenBean; 

import javax.ejb.MessageDrivenContext; 

import javax.ejb.EJBException; 

import javax.jms.MessageListener; 

import javax.jms.Message; 

public class PrintBean implements MessageDrivenBean, MessageListener { 

  public void setMessageDrivenContext(MessageDrivenContext c) throws EJBException {} 

  public void ejbCreate() {} 

  public void ejbRemove() {} 

  public void onMessage(Message message) { 

    System.err.println("Got Message: " + message.toString()); 

  } 

}  

The ejb jar.xml deployment descriptor for the example MDB configures how messages are 

delivered to a MDB.  For example, Listing 11 6, the ejb jar.xml deployment descriptor 

configures a bean named PrintBean which will receive messages from a queue with no 

message selector and who's transaction will be bean managed and messages will be auto 

acknowledged by the JMS provider. 

Listing 11 6, the ejb jar.xml deployment descriptor 

      PrintBean 

      example.beans.PrintBean 

      Bean 

      Auto acknowledge 

      javax.jms.Queue 

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