This blog shows how to return a Location header after a resource creation (POST) when building a contract first REST services using RAML.
Mule ESB makes it very easy to process incomming e-mail messages using the POP3 protocol.
Here is a simple example that will check for new e-mail messages evry 10 seconds and print some basic header information together with the body.
One of the features of Mules ESB, that I find very useful, is the Mule Expression Language (MEL). It can be used not only for flow control and filters, in fact most of the components and transformers that come out-of-the-box with Mule ESB support that properties are specified using MEL.
In Mule ESB 3 they introduced the concept of Configuration Patterns. These patterns helps you simplify some specific but common integration scenarios.