Backend in Java EE

The backend is the Java EE part of the application. It serves the Angular 2 UI and provides the rest services.

The web module provides the rest services with the classes CrDetailResource/CrTableResource. The Jax-Rs Annotations are used to get the rest service. The DisableCaching Annotation sets the NoCache flag in the http header(Browser caching). Both rest services add CORS header flags for requests from "http://localhost". The flags are needed to because the UI is served by Angular-Cli and the services are provided by the Java EE servicer. By default an app in the browser can only access services of the server it came from. In development cors needs to be disabled. To access the ejbs for the data they are injected.