/**
* 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.*;
import rx.
Observable.
OnSubscribe;
import rx.
Scheduler.
Worker;
import rx.exceptions.
Exceptions;
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 {
worker.
unsubscribe();
} finally {
Exceptions.
throwOrReport(
e,
child);
}
}
}
},
initialDelay,
period,
unit);
}
}