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.util;
  
  import io.netty.channel.Channel;
  import io.netty.util.concurrent.FastThreadLocal;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.WeakHashMap;
  
  /**
   * @author zhaowang
   * @version : ThreadLocalTimeHolder.java, v 0.1 2021年07月01日 3:05 下午 zhaowang
   */
  public class ThreadLocalArriveTimeHolder {
  
      private static FastThreadLocal<WeakHashMap<Channel, Map<Integer, Long>>> arriveTimeInNano = new FastThreadLocal<WeakHashMap<Channel, Map<Integer, Long>>>();
  
      public static void arrive(Channel channel, Integer key) {
          Map<Integer, Long> map = getArriveTimeMap(channel);
          if (map.get(key) == null) {
              map.put(key, System.nanoTime());
          }
      }
  
      public static long getAndClear(Channel channel, Integer key) {
          Map<Integer, Long> map = getArriveTimeMap(channel);
          Long result = map.remove(key);
          if (result == null) {
              return -1;
          }
          return result;
      }
  
      private static Map<Integer, Long> getArriveTimeMap(Channel channel) {
          WeakHashMap<Channel, Map<Integer, Long>> map = arriveTimeInNano.get();
          if (map == null) {
              arriveTimeInNano.set(new WeakHashMap<Channel, Map<Integer, Long>>(256));
              map = arriveTimeInNano.get();
          }
          Map<Integer, Long> subMap = map.get(channel);
          if (subMap == null) {
              map.put(channel, new HashMap<Integer, Long>());
          }
          return map.get(channel);
      }
  }
  