I added maven-antrun-plugin and I see a bunch of lines (see below) but I can I tell if the byte-weaving actually occurred? Seems like black magic to me :-). There doesn't appear to be anything different in the eclipselink log file when I run.
[INFO] --- maven-antrun-plugin:1.3:run (default) @ austin-dbaccess --- [INFO] Executing tasks [java] [EL Config]: metadata: 2013-12-05 16:03:53.182--ServerSession(1858215506)--Thread(Thread[main,5,main])--The access type for the persistent class [class com.sss.dbaccess.TriggerJson] is set to [PROPERTY].