Java Reference
In-Depth Information
The handler illustrated here just performs a simple pass through in order to focus on the skel-
eton of the handler interface. But handlers, like filters and EJB interceptors, offer an important
opportunity for client developers to access or modify the contents of their messages, especially
when they need to supply security credentials, add headers, change the message contents on
the fly (for example, by encrypting them), or ensure that their outbound message conforms
with a policy of some kind.
