About this project

This project aims at showing how to structure a play application with the cake pattern.

It was used in a presentation at Ping Conf in 2014:

• video of the presentation: http://www.ustream.tv/recorded/42775808
• slides: https://speakerdeck.com/yanns/structure-a-play-application-with-the-cake-pattern-and-test-it

It was then extended for compile time dependency injection with macwire (or simple class constructors)

• slides: http://de.slideshare.net/yann_s/play-24dimacwire

Structure

This frontend application uses two backend: a micro-service about players and a video streaming app

The cake pattern in progressively introduces in a frontend application, from TBA_01 to TBA_06. The final version is TBA_05_final.

The version with macwire is TBA_macwire.

How to run this application

• start the backends:

cd backends/PlayerService/
./sbt.sh run

in another terminal:

cd backends/VideoService/
./sbt.sh run

• start one frontend, for example the final version:

cd frontend/TBA_05_final/
sbt run

• check the tests with:

sbt test

Further developments

Some new versions of the frontend application were added after the presentation to explore other ways to structure an application:

• TBA_07 does not use any components nor any dependency injection. The testing is done only with component tests and is explained in a blog post.
• TBA_macwire uses simple constructors to express dependencies and MacWire to "inject" them. It is like a dependency injection at compile time.