October 2018
Intermediate to advanced
556 pages
15h 18m
English
Content preview from Hands-On Reactive Programming in Spring 5
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Peeking elements while sequence processing
Sometimes it is required to perform an action for each element or a particular signal in the middle of the processing pipeline. To fulfill such requirements, Project Reactor provides the following methods:
- doOnNext(Consumer<T>) allows us to execute some action on each element on Flux or Mono
- doOnComplete()and doOnError(Throwable) are invoked on corresponding events
- doOnSubscribe(Consumer<Subscription>), doOnRequest(LongConsumer), and doOnCancel(Runnable) allow us to react to subscription life-cycle events
- doOnTerminate(Runnable) is called when a stream is terminated, no matter what caused the termination
Also, Flux and Mono provide the doOnEach(Consumer<Signal>) method, which handles all signals ...
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