![]() ![]() ![]() It corresponds to both Single and Maybe types on the RxJava side. A Flux is the equivalent of an RxJava Observable, capable of emitting 0 or more items, and then optionally either completing or erroring.Ī Mono on the other hand can emit at most once. Reactor's two main types are the Flux and Mono. In this article we'll draw a parallel between Reactor and what you already learned about RxJava, and showcase the common elements as well as the differences. To test an Observable, RxJava provides a TestSubscriber, which is a special flavor of Observer that allows you to assert events in your stream. Keep in mind that the contract of an Observable is to notify its Observer of 0 or more data items through onNext, optionally followed by either an onError or onComplete terminating event. Observable is the push source and Observer is the simple interface for consuming this source via the act of subscribing. In previous articles in this series, " RxJava by Example" and " Testing RxJava", you learned about the basics of reactive programming: how data is conceptualized as a stream, the Observable class and its various operators, the factory methods that create Observables from static and dynamic sources. Its design is the result of a savant mix fueled by designs and core contributors from Reactor 2 (the previous major version) and RxJava. It has been launched by Spring custodian Pivotal, and builds on the Reactive Streams specification, Java 8, and the ReactiveX vocabulary. Reactor, like RxJava 2, is a fourth generation reactive library. Reactor is a core dependency in the reactive programming model support of Spring Framework 5.It is a 4th generation reactive library that allows operator fusion, like RxJava 2.It uses the same approach and philosophy as RxJava despite some API differences.Reactor is a reactive streams library targeting Java 8 and providing an Rx-conforming API. ![]()
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