| /* |
| * 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.cassandra.db.compaction; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.concurrent.locks.Condition; |
| |
| import com.google.common.util.concurrent.Uninterruptibles; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.Util; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.utils.concurrent.SimpleCondition; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| import static org.junit.Assert.assertEquals; |
| |
| public class ValidationExecutorTest |
| { |
| |
| CompactionManager.ValidationExecutor validationExecutor; |
| |
| @Before |
| public void setup() |
| { |
| DatabaseDescriptor.clientInitialization(); |
| // required for static initialization of CompactionManager |
| DatabaseDescriptor.setConcurrentCompactors(2); |
| DatabaseDescriptor.setConcurrentValidations(2); |
| |
| // shutdown the singleton CompactionManager to ensure MBeans are unregistered |
| CompactionManager.instance.forceShutdown(); |
| } |
| |
| @After |
| public void tearDown() |
| { |
| if (null != validationExecutor) |
| validationExecutor.shutdownNow(); |
| } |
| |
| @Test |
| public void testQueueOnValidationSubmission() throws InterruptedException |
| { |
| Condition taskBlocked = new SimpleCondition(); |
| AtomicInteger threadsAvailable = new AtomicInteger(DatabaseDescriptor.getConcurrentValidations()); |
| CountDownLatch taskComplete = new CountDownLatch(5); |
| validationExecutor = new CompactionManager.ValidationExecutor(); |
| |
| ExecutorService testExecutor = Executors.newSingleThreadExecutor(); |
| for (int i=0; i< 5; i++) |
| testExecutor.submit(() -> { |
| threadsAvailable.decrementAndGet(); |
| validationExecutor.submit(new Task(taskBlocked, taskComplete)); |
| }); |
| |
| // wait for all tasks to be submitted & check that the excess ones were queued |
| while (threadsAvailable.get() > 0) |
| TimeUnit.MILLISECONDS.sleep(10); |
| |
| // getActiveTaskCount() relies on getActiveCount() which gives an approx number so we poll it |
| Util.spinAssertEquals(2, () -> validationExecutor.getActiveTaskCount(), 1); |
| assertEquals(3, validationExecutor.getPendingTaskCount()); |
| |
| taskBlocked.signalAll(); |
| taskComplete.await(10, TimeUnit.SECONDS); |
| validationExecutor.shutdownNow(); |
| } |
| |
| @Test |
| public void testAdjustPoolSize() |
| { |
| // adjusting the pool size should dynamically set core and max pool |
| // size to DatabaseDescriptor::getConcurrentValidations |
| |
| validationExecutor = new CompactionManager.ValidationExecutor(); |
| |
| int corePoolSize = validationExecutor.getCorePoolSize(); |
| int maxPoolSize = validationExecutor.getMaximumPoolSize(); |
| |
| DatabaseDescriptor.setConcurrentValidations(corePoolSize * 2); |
| validationExecutor.adjustPoolSize(); |
| assertThat(validationExecutor.getCorePoolSize()).isEqualTo(corePoolSize * 2); |
| assertThat(validationExecutor.getMaximumPoolSize()).isEqualTo(maxPoolSize * 2); |
| validationExecutor.shutdownNow(); |
| } |
| |
| private static class Task implements Runnable |
| { |
| private final Condition blocked; |
| private final CountDownLatch complete; |
| |
| Task(Condition blocked, CountDownLatch complete) |
| { |
| this.blocked = blocked; |
| this.complete = complete; |
| } |
| |
| public void run() |
| { |
| Uninterruptibles.awaitUninterruptibly(blocked, 10, TimeUnit.SECONDS); |
| complete.countDown(); |
| } |
| } |
| } |