Reactive - 11 - Reactive to Blocking

翻译自：https://tech.io/playgrounds/929/reactive-programming-with-reactor-3/ReactiveToBlocking

Reactive to Blocking

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Sometimes you can only migrate part of your code to be reactive, and you need
to reuse reactive sequences in more imperative code.

有时，您只能将部分代码迁移为反应式代码，并且需要在更重要的代码中重用反应式序列。

Thus if you need to block until the value from a Mono is available, use
Mono#block() method. It will throw an Exception if the onError event
is triggered.

因此，如果需要阻塞，直到Mono的值可用，请使用Mono#block()方法。如果触发onError事件，它将引发异常。

Note that you should avoid this by favoring having reactive code end-to-end,
as much as possible. You MUST avoid this at all cost in the middle of other
reactive code, as this has the potential to lock your whole reactive pipeline.

注意，您应该尽可能多地使用反应式代码来避免这种情况。您必须在其他反应性代码中不惜一切代价避免这种情况，
因为这有可能锁定您的整个反应性管道。

    // Return the user contained in that Mono
    User monoToValue(Mono mono) {
        return mono.block();
    }

Similarly, you can block for the first or last value in a Flux with
blockFirst()/blockLast(). You can also transform a Flux to an Iterable
with toIterable. Same restrictions as above still apply.

类似地，可以使用blockFirst()/blockLast()阻塞Flux中的第一个或最后一个值。
您还可以使用 toIterable 将Flux转换为Iterable。上述限制仍然适用。

    // Return the users contained in that Flux
    Iterable fluxToValues(Flux flux) {
        return flux.toIterable();
    }