␡
- Entity Bean
- Session Bean
- Message Bean
- Relationships
- Going Forward
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Message Bean
Although the entity bean can be fairly complex, the session bean is simpler, and the message bean tags are simpler still. First, the example bean:
package com.dzrealms.example.entity;
import javax.ejb.MessageDrivenBean;
import javax.ejb.MessageDrivenContext;
import javax.ejb.EJBException;
import javax.ejb.CreateException;
import javax.jms.MessageListener;
import javax.jms.Message;
/**
* @ejb.bean name="ExampleMessage"
* destination-type="javax.jms.Queue"
*
* @jboss.destination-jndi-name name="queue/ExampleQueue"
*/
public class ExampleMessageBean implements MessageDrivenBean, MessageListener {
/**
* @ejb.create-method
* @throws CreateException
*/
public void ejbCreate() throws CreateException {
}
public void setMessageDrivenContext(MessageDrivenContext context) {
}
public void ejbRemove() throws EJBException {
}
public void onMessage(Message message) {
}
}
That is the entire bean. The only definitions required for a message bean include naming it, defining what kind of messaging it handles and naming the queue/topic. There is nothing else to define for a message bean other than tagging the create.