rx.internal.operators.OperatorDelay Maven / Gradle / Ivy
/**
* 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.internal.operators;
import java.util.concurrent.TimeUnit;
import rx.Observable.Operator;
import rx.Scheduler;
import rx.Scheduler.Worker;
import rx.Subscriber;
import rx.functions.Action0;
/**
* Delays the emission of onNext events by a given amount of time.
*
* @param
* the value type
*/
public final class OperatorDelay implements Operator {
final long delay;
final TimeUnit unit;
final Scheduler scheduler;
public OperatorDelay(long delay, TimeUnit unit, Scheduler scheduler) {
this.delay = delay;
this.unit = unit;
this.scheduler = scheduler;
}
@Override
public Subscriber call(final Subscriber child) {
final Worker worker = scheduler.createWorker();
child.add(worker);
return new Subscriber(child) {
// indicates an error cut ahead
// accessed from the worker thread only
boolean done;
@Override
public void onCompleted() {
worker.schedule(new Action0() {
@Override
public void call() {
if (!done) {
done = true;
child.onCompleted();
}
}
}, delay, unit);
}
@Override
public void onError(final Throwable e) {
worker.schedule(new Action0() {
@Override
public void call() {
if (!done) {
done = true;
child.onError(e);
worker.unsubscribe();
}
}
});
}
@Override
public void onNext(final T t) {
worker.schedule(new Action0() {
@Override
public void call() {
if (!done) {
child.onNext(t);
}
}
}, delay, unit);
}
};
}
}