This topic describes how to add function to a preexisting mediation
handler to operate on the message header.
Before you begin
Before you start this task, you should have created the basic mediation
handler in an EJB project (see
Writing a mediation handler.
It will be useful to have understood the elements of the task
Working with the message payload, because some of those elements are used in this task
About this task
There are different types of field that you can set in message
headers. Importantly, you can set the forward and return routing addresses
for messages after they have been mediated at the current destination. In
addition there are other fields that you can set, such as priority
and reliability for the message and its reply, and the remaining time before
the message (or the reply) expires.
Procedure
- To set routing addresses in the message header, see Setting routing addresses in a message header.
- To set all other fields in the message header, see Working with non-routing path fields in a message header.