What's the better approach for processing batch commands

I'm doing a test for comparing pl/sql vs Java/EJB :

I have to read a file (with assyncronous bank commands) and process each one. Is it better to have a client that generates jms messages processed by a cluster of MDB's or use EJB's to do the job?

THis processing involves verifying if the command is valid and acessing the legacy DB (just for the test).