What Are the Mono and Flux Types?Spring interview question set 1/Spring Interview Questions and Answers for Freshers & Experienced

What Are the Mono and Flux Types?

The WebFlux framework in Spring Framework 5 uses Reactor as its async foundation.

This project provides two core types: Mono to represent a single async value and Flux to represent a stream of async values. They both also implement the Publisher interface defined in the Reactive Streams specification.

Mono implements Publisher and returns 0 or 1 elements:
public abstract class Mono<T> implements Publisher<T> {...}
And Flux implements Publisher and returns N elements:
public abstract class Flux<T> implements Publisher<T> {...}

By definition, the two types represent streams, and so they're both lazy. This means nothing is executed until we consume the stream using the subscribe() method. Both types are also immutable, so calling any method will return a new instance of Flux or Mono.

Posted Date:- 2021-08-19 03:49:22

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