Mule 2: A Developer's Guide

Chapter 7. Extending Mule

Building Mule elements is a fundamental task when putting Mule applications together. The first section in this chapter covers the abstract and base classes and interfaces to use to build your own Mule transformer. In the sections that follow we will examine how you can create a Mule filter and a Mule router.

Building a Transformer

A transformer in Mule is nothing more complex than a simple Java class that converts data from one type of object (or structure) to another. It is meant to facilitate the conversion from one sort of object (or structure) to another, and will work on in-flight data before the service component receives the Mule message or after the component has dispatched a Mule message, depending on the direction ...