You will find explanations of how it works, how to set it up and the idea behind each service. For the acutal code, as well as more technical information head to GitHub.
The Open Integration Hub is a framework for easy data exchange between business applications. It provides a technical integration layer for your product or project. It is not meant as an enduser-ready application, but rather to give you a flexible set of services to enrich or build your own solution. You can easily create asynchronous integration flows and benefit from a wide range of standardized open source integration components.