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ObservableEmitter.java

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/**

* Copyright (c) 2016-present, RxJava Contributors.

*

* 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 io.reactivex;

import io.reactivex.disposables.Disposable;

import io.reactivex.functions.Cancellable;

/**

* Abstraction over an RxJava {@link Observer} that allows associating

* a resource with it.

* <p>

* The onNext, onError and onComplete methods should be called

* in a sequential manner, just like the Observer's methods.

* Use {@link #serialize()} if you want to ensure this.

* The other methods are thread-safe.

*

* @param <T> the value type to emit

*/

public interface ObservableEmitter<T> extends Emitter<T> {

/**

* Sets a Disposable on this emitter; any previous Disposable

* or Cancellation will be unsubscribed/cancelled.

* @param d the disposable, null is allowed

*/

void setDisposable(Disposable d);

/**

* Sets a Cancellable on this emitter; any previous Disposable

* or Cancellation will be unsubscribed/cancelled.

* @param c the cancellable resource, null is allowed

*/

void setCancellable(Cancellable c);

/**

* Returns true if the downstream disposed the sequence.

* @return true if the downstream disposed the sequence

*/

boolean isDisposed();

/**

* Ensures that calls to onNext, onError and onComplete are properly serialized.

* @return the serialized ObservableEmitter

*/

ObservableEmitter<T> serialize();

}