RxJava

https://github.com/ReactiveX/RxJava/wiki/How-To-Use-RxJava
https://habrahabr.ru/post/270975/
https://github.com/ReactiveX/RxJava/wiki/Alphabetical-List-of-Observable-Operators
https://github.com/simonbasle/practicalrx/
https://github.com/simonbasle/practicalrx/


http://mvnrepository.com/artifact/com.github.alaisi.pgasync/postgres-async-driver/0.9
https://github.com/simonbasle/practicalrx/tree/solution/step9




https://stackoverflow.com/questions/34286017/unexplainable-lack-of-performance-improvement-using-rxjava-observables-in-web-ap

//  course Reactive Programming in Java 8 With RxJava
https://github.com/armdev/reactive-javaserver-faces