java - Mono/Flux 是否有来自 Stream/Optional API 的 Peek/IfPresent 这样的操作符？

Question

正如标题所说，想知道在使用 Mono/Flux 时，是否有任何等效(或类似)的运算符可以从 Java Stream API 中查看和 ifPresent。

Answer 1

Flux#hasElement :

Emit a single boolean true if any of the elements of this Flux sequence is equal to the provided value. The implementation uses short-circuit logic and completes with true if an element matches the value.

Mono<Boolean> ifPresent = Flux.<Ob>just(...)
        .hasElement(value); // similar to ifPresent

Flux#doOnNext :

Add behavior (side-effect) triggered when the Flux emits an item.

Flux<Ob> flux = Flux.<Ob>just()
        .doOnNext(i -> {}); // similar to peek