Patterns: Implementing Self-Service in an SOA Environment

Chapter 11. JMS scenario 367

if (ic==null) {

//System.out.println("ic was null, it was probably the first time

this was called");

getInitialContext();

}

retreived=ic.lookup(jndiName);

objectNames.put(jndiName,retreived);

return retreived;

}

}

The JMS resource reference is bound to the JMS resource JNDI name during

application assembly or deployment.

11.3.3 Message selectors

An activation specification defined at runtime triggers the message-driven bean

when a message arrives on the queue. When defining the activation

specification, you can limit the messages that trigger the MDB by specifying a

message selector. See Figure 11-4 on page 368.