| /* |
| * 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.samza.clustermanager; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| public class MockContainerListener { |
| private final CountDownLatch conditionLatch; |
| |
| |
| private final AsyncCountableCondition containersAdded; |
| private final AsyncCountableCondition containersReleased; |
| private final AsyncCountableCondition containersAssigned; |
| private final AsyncCountableCondition containersRunning; |
| |
| private final AsyncCountableCondition[] allConditions; |
| |
| public MockContainerListener(int numExpectedContainersAdded, |
| int numExpectedContainersReleased, |
| int numExpectedContainersAssigned, |
| int numExpectedContainersRunning, |
| Runnable addContainerAssertions, |
| Runnable releaseContainerAssertions, |
| Runnable assignContainerAssertions, |
| Runnable runContainerAssertions) { |
| containersAdded = new AsyncCountableCondition("containers added", numExpectedContainersAdded, addContainerAssertions); |
| containersReleased = new AsyncCountableCondition("containers released", numExpectedContainersReleased, releaseContainerAssertions); |
| containersAssigned = new AsyncCountableCondition("containers assigned", numExpectedContainersAssigned, assignContainerAssertions); |
| containersRunning = new AsyncCountableCondition("containers running", numExpectedContainersRunning, runContainerAssertions); |
| |
| allConditions = new AsyncCountableCondition[] {containersAdded, containersReleased, containersAssigned, containersRunning}; |
| |
| int unsatisfiedConditions = 0; |
| for (AsyncCountableCondition condition : allConditions) { |
| if (!condition.isSatisfied()) { |
| unsatisfiedConditions++; |
| } |
| } |
| |
| conditionLatch = new CountDownLatch(unsatisfiedConditions); |
| } |
| |
| public void postAddContainer(int totalAddedContainers) { |
| if (containersAdded.update(totalAddedContainers)) { |
| conditionLatch.countDown(); |
| } |
| } |
| |
| public void postReleaseContainers(int totalReleasedContainers) { |
| if (containersReleased.update(totalReleasedContainers)) { |
| conditionLatch.countDown(); |
| } |
| } |
| |
| public void postUpdateRequestStateAfterAssignment(int totalAssignedContainers) { |
| if (containersAssigned.update(totalAssignedContainers)) { |
| conditionLatch.countDown(); |
| } |
| } |
| |
| public void postRunContainer(int totalRunningContainers) { |
| if (containersRunning.update(totalRunningContainers)) { |
| conditionLatch.countDown(); |
| } |
| } |
| |
| /** |
| * This method should be called in the main thread. It waits for all the conditions to occur in the other |
| * threads and then verifies that they were in fact satisfied. |
| */ |
| public void verify() throws InterruptedException { |
| conditionLatch.await(5, TimeUnit.SECONDS); |
| |
| for (AsyncCountableCondition condition : allConditions) { |
| condition.verify(); |
| } |
| } |
| |
| private static class AsyncCountableCondition { |
| private boolean satisfied = false; |
| private final int expectedCount; |
| private final Runnable postConditionAssertions; |
| private final String name; |
| private AssertionError assertionError = null; |
| |
| private AsyncCountableCondition(String name, int expectedCount, Runnable postConditionAssertions) { |
| this.name = name; |
| this.expectedCount = expectedCount; |
| if (expectedCount == 0) satisfied = true; |
| this.postConditionAssertions = postConditionAssertions; |
| } |
| |
| public boolean update(int latestCount) { |
| if (!satisfied && latestCount == expectedCount) { |
| if (postConditionAssertions != null) { |
| try { |
| postConditionAssertions.run(); |
| } catch (Throwable t) { |
| assertionError = new AssertionError(String.format("Assertion for '%s' failed", name), t); |
| } |
| } |
| |
| satisfied = true; |
| return true; |
| } |
| return false; |
| } |
| |
| public boolean isSatisfied() { |
| return satisfied; |
| } |
| |
| public void verify() { |
| assertTrue(String.format("Condition '%s' was not satisfied", name), isSatisfied()); |
| |
| if (assertionError != null) { |
| throw assertionError; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| } |
| } |