content: /*
   * 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.weex.common;
  
  import android.support.annotation.RestrictTo;
  import android.support.annotation.RestrictTo.Scope;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  
  /**
   * Class for managing work thread.
   *
   * <p>
   *  This class is for internal purpose,
   *  please don't use it directly unless you know what you are doing.
   * </p>
   */
  @RestrictTo(Scope.LIBRARY_GROUP)
  public class WXWorkThreadManager {
  
    private ExecutorService singleThreadExecutor;
  
    public WXWorkThreadManager() {
      singleThreadExecutor = Executors.newSingleThreadExecutor();
    }
  
    public void post(Runnable task) {
      if (singleThreadExecutor != null)
        singleThreadExecutor.execute(task);
    }
  
    /**
     * Destroy current instance
     */
    public void destroy() {
      if (singleThreadExecutor != null)
        singleThreadExecutor.shutdown();
      singleThreadExecutor = null;
    }
  }
  