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Merge pull request #609 from akarnokd/OperationTimer3
Operation Timer 3.0
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116 changes: 64 additions & 52 deletions
116
rxjava-core/src/main/java/rx/operators/OperationTimer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,74 +1,86 @@ | ||
| /** | ||
| * Copyright 2013 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. | ||
| */ | ||
| /** | ||
| * Copyright 2013 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.operators; | ||
|
|
||
| import java.util.concurrent.TimeUnit; | ||
|
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| import rx.Observable.OnSubscribeFunc; | ||
| import rx.Observer; | ||
| import rx.Scheduler; | ||
| import rx.Subscription; | ||
| import rx.schedulers.Schedulers; | ||
| import rx.subscriptions.Subscriptions; | ||
| import rx.util.functions.Action0; | ||
|
|
||
| /** | ||
| * Operation Timer with several overloads. | ||
| * | ||
| * @see <a href='http://msdn.microsoft.com/en-us/library/system.reactive.linq.observable.timer.aspx'>MSDN Observable.Timer</a> | ||
| */ | ||
| public final class OperationTimer { | ||
|
|
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| public static OnSubscribeFunc<Void> timer(long interval, TimeUnit unit) { | ||
| return timer(interval, unit, Schedulers.threadPoolForComputation()); | ||
| } | ||
|
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| public static OnSubscribeFunc<Void> timer(final long delay, final TimeUnit unit, final Scheduler scheduler) { | ||
| return new OnSubscribeFunc<Void>() { | ||
| @Override | ||
| public Subscription onSubscribe(Observer<? super Void> observer) { | ||
| return new Timer(delay, unit, scheduler, observer).start(); | ||
| } | ||
| }; | ||
| } | ||
|
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| private static class Timer { | ||
| private final long period; | ||
| private final TimeUnit unit; | ||
| private OperationTimer() { throw new IllegalStateException("No instances!"); } | ||
|
|
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| /** | ||
| * Emit a single 0L after the specified time elapses. | ||
| */ | ||
| public static class TimerOnce implements OnSubscribeFunc<Long> { | ||
| private final Scheduler scheduler; | ||
| private final Observer<? super Void> observer; | ||
|
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| private Timer(long period, TimeUnit unit, Scheduler scheduler, Observer<? super Void> observer) { | ||
| this.period = period; | ||
| this.unit = unit; | ||
| private final long dueTime; | ||
| private final TimeUnit dueUnit; | ||
| public TimerOnce(long dueTime, TimeUnit unit, Scheduler scheduler) { | ||
| this.scheduler = scheduler; | ||
| this.observer = observer; | ||
| this.dueTime = dueTime; | ||
| this.dueUnit = unit; | ||
| } | ||
|
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| public Subscription start() { | ||
| final Subscription s = scheduler.schedule(new Action0() { | ||
|
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| @Override | ||
| public Subscription onSubscribe(final Observer<? super Long> t1) { | ||
| return scheduler.schedule(new Action0() { | ||
| @Override | ||
| public void call() { | ||
| observer.onNext(null); | ||
| observer.onCompleted(); | ||
| t1.onNext(0L); | ||
| t1.onCompleted(); | ||
| } | ||
| }, period, unit); | ||
|
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| return Subscriptions.create(new Action0() { | ||
|
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| }, dueTime, dueUnit); | ||
| } | ||
| } | ||
| /** | ||
| * Emit 0L after the initial period and ever increasing number after each period. | ||
| */ | ||
| public static class TimerPeriodically implements OnSubscribeFunc<Long> { | ||
| private final Scheduler scheduler; | ||
| private final long initialDelay; | ||
| private final long period; | ||
| private final TimeUnit unit; | ||
| public TimerPeriodically(long initialDelay, long period, TimeUnit unit, Scheduler scheduler) { | ||
| this.scheduler = scheduler; | ||
| this.initialDelay = initialDelay; | ||
| this.period = period; | ||
| this.unit = unit; | ||
| } | ||
|
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| @Override | ||
| public Subscription onSubscribe(final Observer<? super Long> t1) { | ||
| return scheduler.schedulePeriodically(new Action0() { | ||
| long count; | ||
| @Override | ||
| public void call() { | ||
| s.unsubscribe(); | ||
| t1.onNext(count++); | ||
| } | ||
| }); | ||
| }, | ||
| initialDelay, period, unit | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| } |
72 changes: 72 additions & 0 deletions
72
rxjava-core/src/test/java/rx/operators/OperationTimerTest.java
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|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| /** | ||
| * Copyright 2013 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.operators; | ||
|
|
||
| import java.util.concurrent.TimeUnit; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
| import org.mockito.InOrder; | ||
| import org.mockito.Mock; | ||
| import static org.mockito.Mockito.*; | ||
| import org.mockito.MockitoAnnotations; | ||
| import rx.Observable; | ||
| import rx.Observer; | ||
| import rx.Subscription; | ||
| import rx.schedulers.TestScheduler; | ||
|
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| public class OperationTimerTest { | ||
| @Mock | ||
| Observer<Object> observer; | ||
| TestScheduler s; | ||
| @Before | ||
| public void before() { | ||
| MockitoAnnotations.initMocks(this); | ||
| s = new TestScheduler(); | ||
| } | ||
| @Test | ||
| public void testTimerOnce() { | ||
| Observable.timer(100, TimeUnit.MILLISECONDS, s).subscribe(observer); | ||
| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
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| verify(observer, times(1)).onNext(0L); | ||
| verify(observer, times(1)).onCompleted(); | ||
| verify(observer, never()).onError(any(Throwable.class)); | ||
| } | ||
| @Test | ||
| public void testTimerPeriodically() { | ||
| Subscription c = Observable.timer(100, 100, TimeUnit.MILLISECONDS, s).subscribe(observer); | ||
| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
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| InOrder inOrder = inOrder(observer); | ||
| inOrder.verify(observer, times(1)).onNext(0L); | ||
|
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| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
| inOrder.verify(observer, times(1)).onNext(1L); | ||
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| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
| inOrder.verify(observer, times(1)).onNext(2L); | ||
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| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
| inOrder.verify(observer, times(1)).onNext(3L); | ||
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| c.unsubscribe(); | ||
| s.advanceTimeBy(100, TimeUnit.MILLISECONDS); | ||
| inOrder.verify(observer, never()).onNext(any()); | ||
|
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| verify(observer, never()).onCompleted(); | ||
| verify(observer, never()).onError(any(Throwable.class)); | ||
| } | ||
| } |