RxJava is a library for reactive programming that allows developers to work with asynchronous data streams using Observables in a declarative style. It was developed at Netflix as the core technology for their backend and is based on the Observer design pattern. RxJava provides syntactic sugar to simplify working with Observables, operators like flatMap to manipulate streams of data, and Schedulers to control concurrency. There are also Rx bindings for other languages and frameworks like RxPY and RxJdbc.

1. http://reactivex.io

2. RxJava
- Reactive Extensions library for C# developed by Erik Meijer at Microsoft
- Based on GOF Observer pattern
- Java version, RxJava developed by Ben Christensen, Jufar Hisain, et al at Netflix
- Core Technology for Netflix backend
- Variety of Rx/Java extensions available via github
- Versions for other languages and technologies (e.g. scala, python, javascript, netty
- Well documented with supporting videos, tutorials, and Coursera MOOC
- Introduction to Rx (http://www.introtorx.com/)
- http://reactivex.io/tutorials.html
- https://www.youtube.com/watch?v=_t06LRX0DV0
- https://www.coursera.org/course/reactive
- Grokking RxJava (http://blog.danlew.net/2014/09/15/grokking-rxjava-part-1/)

3. Major Components:
1. Observable
2. Observer /Subscriber
3. Subject

5. Syntactic sugar for a “for” block

7. Flatmap reduces a List of Lists to a single List

9. RxPY
https://github.com/ReactiveX/RxPY/blob/develop/notebooks/Getting%20Started.ipynb

10. Scheduler

11. Observable created from JDBC query

12. RxJdbc