| /* |
| * * |
| * 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.concurrent; |
| |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.LinkedBlockingQueue; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.SynchronousQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| |
| /** Factory methods for ExecutorService, ScheduledExecutorService instances. |
| * These executor service instances provide additional functionality (e.g |
| * logging uncaught exceptions). */ |
| public final class HadoopExecutors { |
| public static ExecutorService newCachedThreadPool(ThreadFactory |
| threadFactory) { |
| return new HadoopThreadPoolExecutor(0, Integer.MAX_VALUE, |
| 60L, TimeUnit.SECONDS, |
| new SynchronousQueue<Runnable>(), |
| threadFactory); |
| } |
| |
| public static ExecutorService newFixedThreadPool(int nThreads, |
| ThreadFactory threadFactory) { |
| return new HadoopThreadPoolExecutor(nThreads, nThreads, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>(), |
| threadFactory); |
| } |
| |
| public static ExecutorService newFixedThreadPool(int nThreads) { |
| return new HadoopThreadPoolExecutor(nThreads, nThreads, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>()); |
| } |
| |
| //Executors.newSingleThreadExecutor has special semantics - for the |
| // moment we'll delegate to it rather than implement the semantics here. |
| public static ExecutorService newSingleThreadExecutor() { |
| return Executors.newSingleThreadExecutor(); |
| } |
| |
| //Executors.newSingleThreadExecutor has special semantics - for the |
| // moment we'll delegate to it rather than implement the semantics here. |
| public static ExecutorService newSingleThreadExecutor(ThreadFactory |
| threadFactory) { |
| return Executors.newSingleThreadExecutor(threadFactory); |
| } |
| |
| public static ScheduledExecutorService newScheduledThreadPool( |
| int corePoolSize) { |
| return new HadoopScheduledThreadPoolExecutor(corePoolSize); |
| } |
| |
| public static ScheduledExecutorService newScheduledThreadPool( |
| int corePoolSize, ThreadFactory threadFactory) { |
| return new HadoopScheduledThreadPoolExecutor(corePoolSize, threadFactory); |
| } |
| |
| //Executors.newSingleThreadScheduledExecutor has special semantics - for the |
| // moment we'll delegate to it rather than implement the semantics here |
| public static ScheduledExecutorService newSingleThreadScheduledExecutor() { |
| return Executors.newSingleThreadScheduledExecutor(); |
| } |
| |
| //Executors.newSingleThreadScheduledExecutor has special semantics - for the |
| // moment we'll delegate to it rather than implement the semantics here |
| public static ScheduledExecutorService newSingleThreadScheduledExecutor( |
| ThreadFactory threadFactory) { |
| return Executors.newSingleThreadScheduledExecutor(threadFactory); |
| } |
| |
| //disable instantiation |
| private HadoopExecutors() { } |
| } |