/*

  * 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.giraph.comm.flow_control;

 import org.apache.giraph.comm.netty.NettyClient;

 import org.apache.giraph.comm.netty.handler.AckSignalFlag;

 import org.apache.giraph.comm.requests.WritableRequest;

 /**

  * Representation of a flow control policy that does not do anything other than

  * the vanilla network client request transfer mechanism

  */

 public class NoOpFlowControl implements FlowControl {

   /** Netty client */

   private final NettyClient nettyClient;

   /**

    * Constructor

    *

    * @param nettyClient netty client

    */

   public NoOpFlowControl(NettyClient nettyClient) {

     this.nettyClient = nettyClient;

   }

   @Override

   public void sendRequest(int destTaskId, WritableRequest request) {

     nettyClient.doSend(destTaskId, request);

   }

   @Override

   public void messageAckReceived(int taskId, long requestId, int response) { }

   @Override

   public AckSignalFlag getAckSignalFlag(int response) {

     return AckSignalFlag.values()[response];

   }

   @Override

   public void waitAllRequests() { }

   @Override

   public int getNumberOfUnsentRequests() {

     return 0;

   }

   @Override

   public int calculateResponse(AckSignalFlag alreadyDone, int taskId) {

     return alreadyDone.ordinal();

   }

   @Override

   public void logInfo() { }

 }