content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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.tencent.angel.ps.server.data;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import java.util.concurrent.atomic.AtomicInteger;
  
  public class ClientRunningContext {
    private static final Log LOG = LogFactory.getLog(ClientRunningContext.class);
    private final AtomicInteger totalRPCCounter = new AtomicInteger(0);
    private final AtomicInteger totalRunningRPCCounter = new AtomicInteger(0);
    private final AtomicInteger inflightingRPCCounter = new AtomicInteger(0);
    private volatile long lastUpdateTs;
    private final SlidingWindow window = new SlidingWindow();
  
    /**
     * Release token for this client
     *
     * @param tokenNum
     */
    public void releaseToken(int tokenNum) {
      inflightingRPCCounter.addAndGet(-tokenNum);
      lastUpdateTs = System.currentTimeMillis();
    }
  
    /**
     * Allocate token for this client
     *
     * @param tokenNum token number
     */
    public void allocateToken(int tokenNum) {
      inflightingRPCCounter.addAndGet(tokenNum);
      lastUpdateTs = System.currentTimeMillis();
    }
  
    public void printToken() {
      LOG.info("+++++++++++++++++++++Client running context start+++++++++++++++++++++");
      LOG.info("totalRunningRPCCounter = " + totalRunningRPCCounter.get());
      LOG.info("infligtingRPCCounter = " + inflightingRPCCounter.get());
      LOG.info("totalRPCCounter = " + totalRPCCounter.get());
      LOG.info("lastUpdateTs = " + lastUpdateTs);
      LOG.info("+++++++++++++++++++++Client running context end  +++++++++++++++++++++");
    }
  
    public class SlidingWindow {
  
    }
  
    /**
     * Receive a request and start to handle it
     *
     * @param seqId request seqId
     */
    public void before(int seqId) {
      totalRPCCounter.incrementAndGet();
      totalRunningRPCCounter.incrementAndGet();
    }
  
    /**
     * Send the response for the request
     *
     * @param seqId request id
     */
    public void after(int seqId) {
      totalRunningRPCCounter.decrementAndGet();
    }
  
    /**
     * Get last token update time
     *
     * @return last token update time
     */
    public long getLastUpdateTs() {
      return lastUpdateTs;
    }
  
    /**
     * Get infighting rpc number from this client
     *
     * @return infighting rpc number from this client
     */
    public int getInflightingRPCCounter() {
      return inflightingRPCCounter.get();
    }
  }
  