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Using fake clock in AckDeadlineRenewerTest (#1413)
This reduces the running time of the test from 3-4 minutes down to 0.03 seconds.
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39 changes: 39 additions & 0 deletions
39
google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/FakeClock.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| /* | ||
| * Copyright 2016 Google Inc. All Rights Reserved. | ||
| * | ||
| * 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. | ||
| */ | ||
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| package com.google.cloud.pubsub; | ||
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| import com.google.cloud.Clock; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.atomic.AtomicLong; | ||
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| /** | ||
| * A Clock to help with testing time-based logic. | ||
| */ | ||
| class FakeClock extends Clock { | ||
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| private final AtomicLong millis = new AtomicLong(); | ||
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| // Advances the clock value by {@code time} in {@code timeUnit}. | ||
| void advance(long time, TimeUnit timeUnit) { | ||
| millis.addAndGet(timeUnit.toMillis(time)); | ||
| } | ||
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| @Override | ||
| public long millis() { | ||
| return millis.get(); | ||
| } | ||
| } |
182 changes: 182 additions & 0 deletions
182
google-cloud-pubsub/src/test/java/com/google/cloud/pubsub/FakeScheduledExecutorService.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| /* | ||
| * Copyright 2016 Google Inc. All Rights Reserved. | ||
| * | ||
| * 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. | ||
| */ | ||
|
|
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| package com.google.cloud.pubsub; | ||
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| import java.util.ArrayList; | ||
| import java.util.Iterator; | ||
| import java.util.List; | ||
| import java.util.concurrent.Callable; | ||
| import java.util.concurrent.Delayed; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.ScheduledFuture; | ||
| import java.util.concurrent.ScheduledThreadPoolExecutor; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
|
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| /** | ||
| * A ScheduledExecutorService to help with testing. | ||
| */ | ||
| class FakeScheduledExecutorService extends ScheduledThreadPoolExecutor { | ||
| private final FakeClock clock; | ||
| private final List<FakeScheduledFuture> futures = new ArrayList<>(); | ||
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| public FakeScheduledExecutorService(int corePoolSize, FakeClock clock) { | ||
| super(corePoolSize); | ||
| this.clock = clock; | ||
| } | ||
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| public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) { | ||
| synchronized (this) { | ||
| long runAtMillis = clock.millis() + unit.toMillis(delay); | ||
| FakeScheduledFuture scheduledFuture = | ||
| new FakeScheduledFuture(command, delay, unit, runAtMillis); | ||
| futures.add(scheduledFuture); | ||
| return scheduledFuture; | ||
| } | ||
| } | ||
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| public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) { | ||
| throw new UnsupportedOperationException( | ||
| "FakeScheduledExecutorService.schedule(Callable, long, TimeUnit) not supported"); | ||
| } | ||
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| public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, | ||
| TimeUnit unit) { | ||
| throw new UnsupportedOperationException( | ||
| "FakeScheduledExecutorService.scheduleAtFixedRate not supported"); | ||
| } | ||
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| public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, | ||
| TimeUnit unit) { | ||
| throw new UnsupportedOperationException( | ||
| "FakeScheduledExecutorService.scheduleAtFixedRate not supported"); | ||
| } | ||
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| public void tick(long time, TimeUnit unit) { | ||
| List<FakeScheduledFuture> runnablesToGo = new ArrayList<>(); | ||
| synchronized (this) { | ||
| clock.advance(time, unit); | ||
| Iterator<FakeScheduledFuture> iter = futures.iterator(); | ||
| while (iter.hasNext()) { | ||
| FakeScheduledFuture scheduledFuture = iter.next(); | ||
| if (scheduledFuture.runAtMillis <= clock.millis()) { | ||
| runnablesToGo.add(scheduledFuture); | ||
| iter.remove(); | ||
| } | ||
| } | ||
| } | ||
| for (FakeScheduledFuture scheduledFuture : runnablesToGo) { | ||
| scheduledFuture.run(); | ||
| } | ||
| } | ||
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| private boolean cancel(FakeScheduledFuture toCancel) { | ||
| synchronized (this) { | ||
| Iterator<FakeScheduledFuture> iter = futures.iterator(); | ||
| while (iter.hasNext()) { | ||
| FakeScheduledFuture scheduledFuture = iter.next(); | ||
| if (scheduledFuture == toCancel) { | ||
| iter.remove(); | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| } | ||
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| private class FakeScheduledFuture implements ScheduledFuture<Object> { | ||
| final Callable<Object> callable; | ||
| final long delay; | ||
| final TimeUnit unit; | ||
| final long runAtMillis; | ||
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| volatile boolean isDone; | ||
| volatile boolean isCancelled; | ||
| volatile Exception exception; | ||
| volatile Object result; | ||
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| FakeScheduledFuture(Runnable runnable, long delay, TimeUnit unit, long runAtMillis) { | ||
| this.callable = Executors.callable(runnable); | ||
| this.delay = delay; | ||
| this.unit = unit; | ||
| this.runAtMillis = runAtMillis; | ||
| } | ||
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| @Override | ||
| public long getDelay(TimeUnit requestedUnit) { | ||
| return unit.convert(delay, requestedUnit); | ||
| } | ||
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| @Override | ||
| public int compareTo(Delayed other) { | ||
| return Long.compare(getDelay(TimeUnit.MILLISECONDS), other.getDelay(TimeUnit.MILLISECONDS)); | ||
| } | ||
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| @Override | ||
| public boolean cancel(boolean var1) { | ||
| if (isCancelled) { | ||
| return isCancelled; | ||
| } | ||
| isCancelled = FakeScheduledExecutorService.this.cancel(this); | ||
| return isCancelled; | ||
| } | ||
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| @Override | ||
| public boolean isCancelled() { | ||
| return isCancelled; | ||
| } | ||
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| @Override | ||
| public boolean isDone() { | ||
| return isDone; | ||
| } | ||
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| @Override | ||
| public Object get() throws InterruptedException, ExecutionException { | ||
| if (!isDone()) { | ||
| throw new UnsupportedOperationException("FakeScheduledFuture: blocking get not supported"); | ||
| } | ||
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| if (exception != null) { | ||
| throw new ExecutionException(exception); | ||
| } | ||
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| return result; | ||
| } | ||
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| @Override | ||
| public Object get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, | ||
| TimeoutException { | ||
| return get(); | ||
| } | ||
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| public void run() { | ||
| if (isDone()) { | ||
| throw new UnsupportedOperationException("FakeScheduledFuture already done."); | ||
| } | ||
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| try { | ||
| result = callable.call(); | ||
| } catch (Exception e) { | ||
| exception = e; | ||
| } | ||
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| isDone = true; | ||
| } | ||
| } | ||
| } |