反应扩展OnNext [英] reactive extension OnNext

问题描述

有了RX Subject，从多线程调用 OnNext（）是否是线程安全的？

With RX Subject, is it thread-safe to call OnNext() from multiple threads?

与合并做同样的事情？

推荐答案

Rx合同要求通知是顺序的，并且对于几个运算符是逻辑必要的。也就是说，您可以使用可用的同步方法来获取此行为。

The Rx contract requires that notifications be sequential, and is a logical necessity for several operators. That said, you can use the available Synchronize methods to get this behaviour.

        var subject = new Subject<int>();
        var syncedSubject = Subject.Synchronize(subject);            

现在可以并发调用 syncedSubject 中。
对于必须同步的观察者，您还可以使用：

You can now make concurrent calls to syncedSubject. For an observer which must be synchronized, you can also use:

        var observer = Observer.Create<Unit>(...);
        var syncedObserver = Observer.Synchronize(observer);

测试：

        Func<int, Action> onNext = i => () => syncedSubject.OnNext(i);
        Parallel.Invoke
        (
            onNext(1),
            onNext(2),
            onNext(3),
            onNext(4)
        );

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