A user-defined message processing node
is a node that you can create to complement the supplied built-in node types.
You might consider the use of a user-defined message processing node in
the following situations:
- Your messages need transformations that the built-in nodes do not provide.
For example, you might need a currency converter node.
- You want to write messages into a flat file on the local system for later
processing by another application or utility program.
Combine your user-defined nodes with the built-in nodes to create message
flows that meet your exact business requirements.