project reactor遇到的坑

笔者最近在使用onErrorStop操作符的时候，发现并没有生效，异常还是被throw出来，并且日志打印了onErrorDroped。仔细看了onErrorStop的java doc发现，每个操作符都有自己的error mode support，即不是每个操作符都能用onErrorStop。

举例doOnNext

/**
     * Add behavior (side-effect) triggered when the {@link Flux} emits an item.
     * 

     * 
     * 

     * The {@link Consumer} is executed first, then the onNext signal is propagated
     * downstream.
     *
     * @param onNext the callback to call on {@link Subscriber#onNext}
     *
     * 
Error Mode Support: This operator supports {@link #onErrorContinue(BiConsumer) resuming on errors}
     * (including when fusion is enabled). Exceptions thrown by the consumer are passed to
     * the {@link #onErrorContinue(BiConsumer)} error consumer (the value consumer
     * is not invoked, as the source element will be part of the sequence). The onNext
     * signal is then propagated as normal.
     *
     * @return an observed  {@link Flux}
     */
    public final Flux doOnNext(Consumer onNext) {
        Objects.requireNonNull(onNext, "onNext");
        return doOnSignal(this, null, onNext, null, null, null, null, null);
    }

中间有一句 *

Error Mode Support: This operator supports {@link #onErrorContinue(BiConsumer) resuming on errors}
意思就是doOnNext只能用onErrorResume