rx.internal.operators.DeferredScalarSubscriberSafe Maven / Gradle / Ivy
/**
* Copyright 2016 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.internal.operators;
import rx.Subscriber;
import rx.plugins.RxJavaHooks;
/**
* Supplements {@code DeferredScalarSubscriber} with defensive behaviour that ensures no emissions
* occur after a terminal event. If {@code onError} is called more than once then errors after the first
* are reported to {@code RxJavaHooks.onError}.
*
* @param source value type
* @param result value type
*/
public abstract class DeferredScalarSubscriberSafe extends DeferredScalarSubscriber {
protected boolean done;
public DeferredScalarSubscriberSafe(Subscriber super R> actual) {
super(actual);
}
@Override
public void onError(Throwable ex) {
if (!done) {
done = true;
super.onError(ex);
} else {
RxJavaHooks.onError(ex);
}
}
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
super.onCompleted();
}
}
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