content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * Licensed 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 com.alibaba.otter.shared.common.utils.thread;
  
  import java.util.concurrent.ArrayBlockingQueue;
  import java.util.concurrent.ThreadPoolExecutor;
  import java.util.concurrent.TimeUnit;
  
  import org.springframework.beans.factory.DisposableBean;
  import org.springframework.beans.factory.FactoryBean;
  import org.springframework.beans.factory.InitializingBean;
  
  /**
   * 基于spring 提供一个async的容器
   * 
   * @author jianghang 2011-11-14 下午03:48:57
   * @version 4.0.0
   */
  public class ExecutorServiceFactoryBean implements FactoryBean, InitializingBean, DisposableBean {
  
      private ThreadPoolExecutor executor;
      private static final int   DEFAULT_POOL_SIZE    = 50;
      private static final int   DEFAULT_ACCEPT_COUNT = 100;
      private int                poolSize             = DEFAULT_POOL_SIZE;
      private int                acceptCount          = DEFAULT_ACCEPT_COUNT;
      private String             name                 = "Otter-Async-Executor";
  
      public Object getObject() throws Exception {
          return executor;
      }
  
      public Class getObjectType() {
          return ThreadPoolExecutor.class;
      }
  
      public boolean isSingleton() {
          return true;
      }
  
      public void afterPropertiesSet() throws Exception {
          if (executor == null) {// 初始化一个默认值
              executor = new ThreadPoolExecutor(poolSize, poolSize, 60, TimeUnit.SECONDS,
                                                new ArrayBlockingQueue(acceptCount), new NamedThreadFactory(name),
                                                new ThreadPoolExecutor.CallerRunsPolicy());
          }
      }
  
      public void destroy() throws Exception {
          executor.shutdown();
      }
  
      public void setExecutor(ThreadPoolExecutor executor) {
          this.executor = executor;
      }
  
      public void setPoolSize(int poolSize) {
          this.poolSize = poolSize;
      }
  
      public void setAcceptCount(int acceptCount) {
          this.acceptCount = acceptCount;
      }
  
      public void setName(String name) {
          this.name = name;
      }
  
  }
  