Rxjs Duplex Streams

Question

有没有办法让RxJ创建一个Observable / Observer对象，它具有接收事件和发出事件的逻辑，类似于Rx.Subject，除非没有组合Observable和Observer，所以当从内部发出事件时Observable的主体，它们不由Observer身体功能处理。

这样的事情：

var someSystem = /* some system that receives and emits events */;

function someFn() {
  return ObservableObserver((observer, observable) => {
    observable.subscribe((e) => someSystem.emit(e));
    someSystem.on("data", (d) => observer.onNext(d));
  });
}

const mySystem = someFn();

mySystem.subscribe(
  (e) => {
    console.log("Received from 'someSystem':", e);
    mySystem.onNext("sending this to 'someSystem'");
  }
);

修改

我相信我要找的东西类似于Node.js Duplex Stream：

https://nodejs.org/api/stream.html#stream_class_stream_duplex

Answer 1

如果我遵循您的要求，您可以使用Subject#create方法：

function someFn() {
  return Subject.create(
    Observer.create((e) => someSystem.emit(e)),
    Observable.fromEvent(someSystem, 'data')
  );
}

const mySystem = someFn()

source.subscribe(mySystem);

mySystem.subscribe((e) => {
  console.log("Received from 'someSystem':", e);
});