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RxJava is a Java VM implementation of Reactive Extensions: a library for composing asynchronous and event-based programs by using observable sequences.

It extends the observer pattern to support sequences of data/events and adds operators that allow you to compose sequences together declaratively while abstracting away concerns about things like low-level threading, synchronization, thread-safety and concurrent data structures.

Main Features

- Zero Dependencies

- Java 6+ & Android 2.3+

- Java 8 lambda support 

- Polyglot (Scala, Groovy, Clojure and Kotlin)

- Non-opinionated about source of concurrency (threads, pools, event loops, fibers, actors, etc)

- Async or synchronous execution

- Virtual time and schedulers for parameterized concurrency

SDK for Android

This release contains mostly internal cleanups, reinforced Observable-protocol adherence and minor javadoc fixes.

  • Add Single.flatMapCompletable. 
  • PublishSubject now signals MissingBackpressureException when backpressured. 
  • Add Observable.sorted() + overloads: sorts and re-emits each element of a finite sequence. 
  • Add concatDelayError multiple arguments. 
  • Add Observable.concat(Iterable) overload. 
  • Add TestSubscriber.assertValuesAndClear
  • workers now wait until a blocking task finishes before becoming available again.
  • Fix all multiple terminal events.
  • Fix reentrancy bug in repeatWhen and retryWhen when the resubscription happens.
  • PublishSubject now checks for unsubscribed child while dispatching events.
  • Fix any multiple terminal events.
  • Fix reduce multiple terminal events.
  • Fix onBackpressureDrop multiple terminal events.
  • Fix collect multiple terminal events.
  • Fix toMap multiple terminal events and backpressure behavior.
  • Fix toMultimap multiple terminal events .
  • Fix Schedulers.from() to call RxJavaHooks.onScheduleAction.


Example A

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