Created
May 22, 2016 10:17
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EventBus with complete and error.
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import rx.Observable; | |
import rx.Subscriber; | |
import rx.Subscription; | |
import rx.functions.Action0; | |
import rx.subjects.PublishSubject; | |
import rx.subjects.SerializedSubject; | |
/** | |
* An object reference of EventBus | |
* courtesy https://gist.github.com/benjchristensen/04eef9ca0851f3a5d7bf | |
* | |
* @hide | |
*/ | |
public class EventBus { | |
static class Completable { | |
Class clz; | |
public static Completable create(Class clz) { | |
Completable completable = new Completable(); | |
completable.clz = clz; | |
return completable; | |
} | |
} | |
static class Error { | |
Throwable t; | |
Class clz; | |
public static Error create(Class clz, Throwable t) { | |
Error error = new Error(); | |
error.clz = clz; | |
error.t = t; | |
return error; | |
} | |
} | |
SerializedSubject<Object, Object> serializedSubject = new SerializedSubject<>(PublishSubject.create()); | |
static EventBus singleton = null; | |
EventBus() { | |
} | |
public static EventBus get() { | |
if (singleton == null) { | |
synchronized (EventBus.class) { | |
if (singleton == null) { | |
singleton = new EventBus(); | |
} | |
} | |
} | |
return singleton; | |
} | |
/** | |
* Send events. | |
*/ | |
public <T> void send(T t) { | |
serializedSubject.onNext(t); | |
} | |
public void complete(Class clz) { | |
serializedSubject.onNext(Completable.create(clz)); | |
} | |
public void error(Class clz, Throwable throwable) { | |
serializedSubject.onNext(Error.create(clz, throwable)); | |
} | |
/** | |
* Observe events sent. | |
*/ | |
public <T> Observable<T> observable(final Class<T> cls) { | |
final Subscription[] holder = new Subscription[1]; | |
Observable<T> obs = Observable.create(new Observable.OnSubscribe<T>() { | |
@Override | |
public void call(final Subscriber<? super T> subscriber) { | |
Subscription subscription = serializedSubject.subscribe(new Subscriber<Object>() { | |
@Override | |
public void onCompleted() { | |
subscriber.onCompleted(); | |
} | |
@Override | |
public void onError(Throwable e) { | |
subscriber.onError(e); | |
} | |
@SuppressWarnings("unchecked") | |
@Override | |
public void onNext(Object o) { | |
if (o instanceof Completable) { | |
if (cls.isAssignableFrom(((Completable) o).clz)) { | |
subscriber.onCompleted(); | |
} | |
} else if (o instanceof Error) { | |
if (cls.isAssignableFrom(((Error) o).clz)) { | |
subscriber.onError(((Error) o).t); | |
} | |
} else if (cls.isAssignableFrom(o.getClass())) { | |
subscriber.onNext((T) o); | |
} | |
} | |
}); | |
holder[0] = subscription; | |
} | |
}).doOnUnsubscribe(new Action0() { | |
@Override | |
public void call() { | |
if (holder[0] != null && !holder[0].isUnsubscribed()) | |
holder[0].unsubscribe(); | |
} | |
}); | |
return obs; | |
} | |
} |
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