How to deal with interfaces in Java EE 6? @Qualifiers, @Stereotypes, @Alternatives with or without interfaces are discussed in this free article: http://www.oracle.com/technetwork/articles/java/intondemand-1444614.html.Feedback is, as always, highly appreciated!
NEW workshop: Building HTML 5 Applications With Angular 2
Full week in December 2016: from Java EE 7 Bootstrap, Effective, Architectures over Testing to Microservices
On demand workshops: Java EE 7: Bootstrap, Effective, Testing and Microservices available for streaming.