| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.bookkeeper.statelib.testing.executors; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static org.mockito.ArgumentMatchers.any; |
| import static org.mockito.ArgumentMatchers.anyLong; |
| import static org.mockito.Mockito.doAnswer; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.util.concurrent.SettableFuture; |
| import java.time.Duration; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.Delayed; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ScheduledFuture; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import lombok.Data; |
| import lombok.Getter; |
| import lombok.extern.slf4j.Slf4j; |
| import org.apache.bookkeeper.common.concurrent.FutureUtils; |
| import org.mockito.stubbing.Answer; |
| |
| /** |
| * A mocked scheduled executor that records scheduled tasks and executes them when the clock is |
| * advanced past their execution time. |
| */ |
| @Slf4j |
| public class MockExecutorController { |
| |
| @Data |
| @Getter |
| private class DeferredTask implements ScheduledFuture<Void>, Runnable { |
| |
| private final Runnable runnable; |
| private final long scheduledAtMillis; |
| @Getter |
| private final CompletableFuture<Void> future; |
| |
| public DeferredTask(Runnable runnable, |
| long delayTimeMs) { |
| this.runnable = runnable; |
| this.scheduledAtMillis = delayTimeMs + clock.millis(); |
| this.future = FutureUtils.createFuture(); |
| } |
| |
| @Override |
| public long getDelay(TimeUnit unit) { |
| return unit.convert(scheduledAtMillis - clock.millis(), TimeUnit.MILLISECONDS); |
| } |
| |
| @Override |
| public int compareTo(Delayed o) { |
| return Long.compare(getDelay(TimeUnit.MILLISECONDS), o.getDelay(TimeUnit.MILLISECONDS)); |
| } |
| |
| @Override |
| public boolean cancel(boolean mayInterruptIfRunning) { |
| return future.cancel(mayInterruptIfRunning); |
| } |
| |
| @Override |
| public boolean isCancelled() { |
| return future.isCancelled(); |
| } |
| |
| @Override |
| public boolean isDone() { |
| return future.isDone(); |
| } |
| |
| @Override |
| public Void get() throws InterruptedException, ExecutionException { |
| future.get(); |
| return null; |
| } |
| |
| @Override |
| public Void get(long timeout, TimeUnit unit) |
| throws InterruptedException, ExecutionException, TimeoutException { |
| future.get(timeout, unit); |
| return null; |
| } |
| |
| @Override |
| public void run() { |
| runnable.run(); |
| FutureUtils.complete(future, null); |
| } |
| |
| } |
| |
| @Getter |
| private final MockClock clock = new MockClock(); |
| private final List<DeferredTask> deferredTasks = Lists.newArrayList(); |
| private final ExecutorService executor; |
| |
| public MockExecutorController(ExecutorService executor) { |
| this.executor = executor; |
| } |
| |
| private void runTask(Runnable runnable) { |
| if (null == executor) { |
| runnable.run(); |
| } else { |
| try { |
| executor.submit(runnable).get(); |
| } catch (InterruptedException | ExecutionException e) { |
| } |
| } |
| } |
| |
| public MockExecutorController controlSubmit(ScheduledExecutorService service) { |
| doAnswer(answerNow(this)).when(service).submit(any(Runnable.class)); |
| return this; |
| } |
| |
| public MockExecutorController controlExecute(ScheduledExecutorService service) { |
| doAnswer(answerNow(this)).when(service).execute(any(Runnable.class)); |
| return this; |
| } |
| |
| public MockExecutorController controlSchedule(ScheduledExecutorService service) { |
| doAnswer(answerDelay(this)).when(service).schedule(any(Runnable.class), anyLong(), any(TimeUnit.class)); |
| return this; |
| } |
| |
| public MockExecutorController controlScheduleAtFixedRate(ScheduledExecutorService service, |
| int maxInvocations) { |
| doAnswer(answerAtFixedRate(this, maxInvocations)) |
| .when(service) |
| .scheduleAtFixedRate(any(Runnable.class), anyLong(), anyLong(), any(TimeUnit.class)); |
| return this; |
| } |
| |
| private static Answer<ScheduledFuture<?>> answerAtFixedRate(MockExecutorController controller, int numTimes) { |
| return invocationOnMock -> { |
| Runnable task = invocationOnMock.getArgument(0); |
| long initialDelay = invocationOnMock.getArgument(1); |
| long delay = invocationOnMock.getArgument(2); |
| TimeUnit unit = invocationOnMock.getArgument(3); |
| |
| DeferredTask deferredTask = null; |
| for (int i = 0; i < numTimes; i++) { |
| long delayMs = unit.toMillis(initialDelay) + i * unit.toMillis(delay); |
| |
| deferredTask = controller.addDelayedTask( |
| controller, |
| delayMs, |
| task); |
| } |
| return deferredTask; |
| }; |
| } |
| |
| private static Answer<ScheduledFuture<?>> answerDelay(MockExecutorController executor) { |
| return invocationOnMock -> { |
| |
| Runnable task = invocationOnMock.getArgument(0); |
| long value = invocationOnMock.getArgument(1); |
| TimeUnit unit = invocationOnMock.getArgument(2); |
| DeferredTask deferredTask = executor.addDelayedTask(executor, unit.toMillis(value), task); |
| if (value <= 0) { |
| executor.runTask(task); |
| FutureUtils.complete(deferredTask.future, null); |
| } |
| return deferredTask; |
| }; |
| } |
| |
| private static Answer<Future<?>> answerNow(MockExecutorController controller) { |
| return invocationOnMock -> { |
| |
| Runnable task = invocationOnMock.getArgument(0); |
| controller.runTask(task); |
| SettableFuture<Void> future = SettableFuture.create(); |
| future.set(null); |
| return future; |
| }; |
| } |
| |
| private DeferredTask addDelayedTask( |
| MockExecutorController executor, |
| long delayTimeMs, |
| Runnable task) { |
| checkArgument(delayTimeMs >= 0); |
| DeferredTask deferredTask = new DeferredTask(task, delayTimeMs); |
| executor.deferredTasks.add(deferredTask); |
| return deferredTask; |
| } |
| |
| public void advance(Duration duration) { |
| clock.advance(duration); |
| Iterator<DeferredTask> entries = deferredTasks.iterator(); |
| List<DeferredTask> toExecute = Lists.newArrayList(); |
| while (entries.hasNext()) { |
| DeferredTask next = entries.next(); |
| if (next.getDelay(TimeUnit.MILLISECONDS) <= 0) { |
| entries.remove(); |
| toExecute.add(next); |
| } |
| } |
| for (DeferredTask task : toExecute) { |
| runTask(task); |
| } |
| } |
| |
| } |