Join point matching

In our last episode, I was using the pointcut expression

execution(* com.example.MessageListener(..))

and getting this error:

java.lang.IllegalArgumentException: warning no match for this type name: com.example [Xlint:invalidAbsoluteTypeName]

I Googled this error (alas, my beloved Ask.com seems to have fewer of the stack trace errors indexed) and found a post to a Spring Framework support forum saying it was the pointcut expression that was incorrect.  And in The AspectJ^TM Programming Guide under Matching and Some Example Pointcuts it does look like there’s supposed to be a method signature there in the pointcut expression, not just a class name.

Now that I understand the pointcut expressions a little more, I think I’ll take out most of the wildcards for now (I’m leaving the “..” wildcard for the Message parameter for now because when I replaced that with Message, I got some kind of error):

<aop:config>
    <aop:pointcut id="stuff" expression="execution(void com.example.MessageListener.onMessage(..))" />
    <aop:advisor advice-ref="txAdvice" pointcut-ref="stuff" />
</aop:config>

Now the deployment succeeds… but when my messagelistener throws a RuntimeException the message is still gone from the queue, so it doesn’t seem to be rolling back correctly yet.  So that’s where we’ll start next time!