First checkout the branch exercise_3_specs with Git: git checkout exercise_3_specs
In this exercise, we are going to manage participants joining and leaving chat rooms and also the deletion of the chat room by the creator in a manner that is concurrency-proof
To complete the exercise, open the ChatRoomService and implement the remaining methods to make the tests greens.
Follow the instructions and read the documentation link ( if necessary, don't spend too much time on it )
The solution is given in the branch exercise_3_solution.
Do not forget to save your work (if you want to keep track
of your solution) in a branch and then check out with Git: git checkout exercise_3_solution