Maven phase

1. validate (download dependency) ->

2. compile (source code) ->

3. test (unit test) ->

4. package (jar) ->

5. install (local repo) ->

6. deploy (remote repo)

Servlet VS Reactive Stack

Lombok

Lombok is controversial project.

• @Getter, @Setter, @Data

• val keyword to define local variable, it will use implied initiating type and equivalent to final.