/**
* 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.OnSubscribe;
import rx.Scheduler;
import rx.Scheduler.Worker;
import rx.Subscriber;
import rx.functions.Action0;
/**
* Emit 0L after the initial period and ever increasing number after each period.
* @see <a href='http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.timer.aspx'>MSDN Observable.Timer</a>
*/
public final class OnSubscribeTimerPeriodically implements OnSubscribe<Long> {
final long initialDelay;
final long period;
final TimeUnit unit;
final Scheduler scheduler;
public OnSubscribeTimerPeriodically(long initialDelay, long period, TimeUnit unit, Scheduler scheduler) {
this.initialDelay = initialDelay;
this.period = period;
this.unit = unit;
this.scheduler = scheduler;
}
@Override
public void call(final Subscriber<? super Long> child) {
final Worker worker = scheduler.createWorker();
child.add(worker);
worker.schedulePeriodically(new Action0() {
long counter;
@Override
public void call() {
try {
child.onNext(counter++);
} catch (Throwable e) {
try {
child.onError(e);
} finally {
worker.unsubscribe();
}
}
}
}, initialDelay, period, unit);
}
}