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Event Notifier in Apache Camel Route

Introduction

Each step of an Apache Camel Application triggers an event that allows us to read or edit data while the message travels on the "Route." The provided mechanism to access these events is the EventNotifierSupport class.

Apache Camel's route is a sequence of steps, executed in order by Camel, that consumes and processes a message. The initial point of this sequence is represented by the method from(). A route may have many processing components that modify a message or send it to an endpoint. 

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Open Source Integration With Apache Camel and How Fuse IDE Can Help

Take any integration project and you have multiple applications talking over multiple transports on multiple platforms. As you can imagine, in large enterprises, applications like this can get complex very fast. Much of the complexity stems from two issues:

  1. Dealing with the specifics of applications and transports
  2. Coming up with good solutions to integration problems

Making your applications speak transports and APIs is relatively easy on its own. I'm sure everyone knows how to send JMS messages to their broker of choice; though it still requires in-depth knowledge of the JMS specification, which many developers may not have. On top of that, what happens when you want to route that JMS message to another application? You then have to take care of mapping the JMS message to the application plus handle any new concepts related to the application. Add a dozen other applications into the mix and you've got quite a headache on your hands.