6.14. Sharing Data Between Handler Invocations

6.14.1. Problem

You want to share data between invocations of your handlers within a chain during processing, but handler instances cannot rely on thread-local state.

6.14.2. Solution

Obtain the message context from the parameter to your handler, and add data to it. There are predefined properties you can set and access later, or you can add your own. These properties are exposed as a map.