Configuring an Interceptor on an EJB 3.0 MDB Message Listener Method

You can designate one non-business method as the interceptor method for a message-driven bean (see "Using Annotations"). The method must have a signature of:

public Object <MethodName>(InvocationContext) throws Exception

For more information, see "Understanding EJB 3.0 Interceptors".

Using Annotations

Example 10-3 shows how to designate a method of a message-driven bean class as an interceptor method using the @AroundInvoke annotation. Each time the onMessage method is invoked, OC4J intercepts the invocation and invokes the interceptor method myInterceptor. The onMessage method invocation proceeds only if the interceptor method returns InvocationContext.proceed().

Example 10-3 @AroundInvoke in an EJB 3.0 Message-Driven Bean

@MessageDriven
public class MessageLogger implements MessageListener
{
    @Resource javax.ejb.MessageDrivenContext mc;

    public void onMessage(Message message)
    {
    ....
    }

    @AroundInvoke
    public Object myInterceptor(InvocationContext ctx) throws Exception 
    {
        if (!userIsValid(ctx. getEJBContext().getCallerPrincipal())) 
        {
            throw new SecurityException(
                "Caller: '" + ctx.getEJBContext().getCallerPrincipal().getName() +
                "' does not have permissions for method " + ctx.getMethod()
            );
        }
        return ctx.proceed();
    }
}