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Subscriber.java
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/**
* Copyright 2014 Netflix, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rx;
import rx.subscriptions.CompositeSubscription;
/**
* Provides a mechanism for receiving push-based notifications.
* <p>
* After an Observer calls an {@link Observable}'s <code>Observable.subscribe</code> method, the {@link Observable} calls the
* Observer's <code>onNext</code> method to provide notifications. A well-behaved {@link Observable} will call an Observer's
* <code>onCompleted</code> closure exactly once or the Observer's <code>onError</code> closure exactly once.
* <p>
* For more information see the <a href="https://github.com/Netflix/RxJava/wiki/Observable">RxJava Wiki</a>
*
* @param <T>
*/
public abstract class Subscriber<T> implements Observer<T>, Subscription {
private final CompositeSubscription cs;
protected Subscriber(CompositeSubscription cs) {
if (cs == null) {
throw new IllegalArgumentException("The CompositeSubscription can not be null");
}
this.cs = cs;
}
protected Subscriber() {
this(new CompositeSubscription());
}
protected Subscriber(Subscriber<?> op) {
this(op.cs);
}
/**
* Used to register an unsubscribe callback.
*/
public final void add(Subscription s) {
cs.add(s);
}
@Override
public final void unsubscribe() {
cs.unsubscribe();
}
public final boolean isUnsubscribed() {
return cs.isUnsubscribed();
}
}