To implement my Service Broker ETL API, I started with the basic code/framework provided by Eitan Blumin in this blog post:http://www.madeiradata.com/service-broker-asynchronous-triggers/. He provides a good basic framework for the setup of Service Broker and an explanation of the installation scripts. To learn more on the basic framework and scripts to implement Service Broker please refer to his post.
The Open Web Server Interface for .Net or OWIN for short is a specification that is meant to decouple the dependency a web application has on a specific web server technology. It specifies a simple delegate function that is used to separate a server and application and to let the server know how to pass the responsibility of filling out the response data to the application.