hadoop ShutdownThreadsHelper 源码

haddop ShutdownThreadsHelper 代码

文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ShutdownThreadsHelper.java

/**
 * 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.hadoop.util;

import org.apache.hadoop.classification.VisibleForTesting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * Helper class to shutdown {@link Thread}s and {@link ExecutorService}s.
 */
public class ShutdownThreadsHelper {
  private static final Logger LOG =
      LoggerFactory.getLogger(ShutdownThreadsHelper.class);

  @VisibleForTesting
  static final int SHUTDOWN_WAIT_MS = 3000;

  /**
   * @param thread {@link Thread to be shutdown}
   * @return <tt>true</tt> if the thread is successfully interrupted,
   * <tt>false</tt> otherwise
   */
  public static boolean shutdownThread(Thread thread) {
    return shutdownThread(thread, SHUTDOWN_WAIT_MS);
  }

  /**
   * @param thread {@link Thread to be shutdown}
   * @param timeoutInMilliSeconds time to wait for thread to join after being
   *                              interrupted
   * @return <tt>true</tt> if the thread is successfully interrupted,
   * <tt>false</tt> otherwise
   */
  public static boolean shutdownThread(Thread thread,
                                    long timeoutInMilliSeconds) {
    if (thread == null) {
      return true;
    }

    try {
      thread.interrupt();
      thread.join(timeoutInMilliSeconds);
      return true;
    } catch (InterruptedException ie) {
      LOG.warn("Interrupted while shutting down thread - " + thread.getName());
      return false;
    }
  }

  /**
   * shutdownExecutorService.
   *
   * @param service {@link ExecutorService to be shutdown}
   * @return <tt>true</tt> if the service is terminated,
   * <tt>false</tt> otherwise
   * @throws InterruptedException if the thread is interrupted.
   */
  public static boolean shutdownExecutorService(ExecutorService service)
      throws InterruptedException {
    return shutdownExecutorService(service, SHUTDOWN_WAIT_MS);
  }

  /**
   * shutdownExecutorService.
   *
   * @param service {@link ExecutorService to be shutdown}
   * @param timeoutInMs time to wait for {@link
   * ExecutorService#awaitTermination(long, java.util.concurrent.TimeUnit)}
   *                    calls in milli seconds.
   * @return <tt>true</tt> if the service is terminated,
   * <tt>false</tt> otherwise
   * @throws InterruptedException if the thread is interrupted.
   */
  public static boolean shutdownExecutorService(ExecutorService service,
                                        long timeoutInMs)
      throws InterruptedException {
    if (service == null) {
      return true;
    }

    service.shutdown();
    if (!service.awaitTermination(timeoutInMs, TimeUnit.MILLISECONDS)) {
      service.shutdownNow();
      return service.awaitTermination(timeoutInMs, TimeUnit.MILLISECONDS);
    } else {
      return true;
    }
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop ApplicationClassLoader 源码

hadoop AsyncDiskService 源码

hadoop AutoCloseableLock 源码

hadoop BasicDiskValidator 源码

hadoop BlockingThreadPoolExecutorService 源码

hadoop CacheableIPList 源码

hadoop ChunkedArrayList 源码

hadoop ClassUtil 源码

hadoop Classpath 源码

hadoop CleanerUtil 源码