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 com.alipay.remoting;
  
  import java.util.concurrent.TimeUnit;
  
  import io.netty.util.HashedWheelTimer;
  import io.netty.util.Timer;
  
  /**
   * A singleton holder of the timer for timeout.
   * 
   * @author jiangping
   * @version $Id: TimerHolder.java, v 0.1 2015-09-28 2:02:20 tao Exp $
   */
  public class TimerHolder {
  
      private final static long defaultTickDuration = 10;
  
      private static class DefaultInstance {
          static final Timer INSTANCE = new HashedWheelTimer(new NamedThreadFactory(
                                          "DefaultTimer" + defaultTickDuration, true),
                                          defaultTickDuration, TimeUnit.MILLISECONDS);
      }
  
      private TimerHolder() {
      }
  
      /**
       * Get a singleton instance of {@link Timer}. <br>
       * The tick duration is {@link #defaultTickDuration}.
       * 
       * @return Timer
       */
      public static Timer getTimer() {
          return DefaultInstance.INSTANCE;
      }
  }