/*

  * 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.requests;

 import org.apache.giraph.comm.ServerData;

 import org.apache.giraph.io.InputType;

 import java.io.DataInput;

 import java.io.DataOutput;

 import java.io.IOException;

 /**

  * A request which master will send to workers to give them splits

  */

 public class ReplyWithInputSplitRequest extends WritableRequest

     implements WorkerRequest {

   /** Type of input split */

   private InputType splitType;

   /** Serialized input split */

   private byte[] serializedInputSplit;

   /**

    * Constructor

    *

    * @param splitType Type of input split

    * @param serializedInputSplit Serialized input split

    */

   public ReplyWithInputSplitRequest(InputType splitType,

       byte[] serializedInputSplit) {

     this.splitType = splitType;

     this.serializedInputSplit = serializedInputSplit;

   }

   /**

    * Constructor used for reflection only

    */

   public ReplyWithInputSplitRequest() {

   }

   @Override

   void readFieldsRequest(DataInput in) throws IOException {

     splitType = InputType.values()[in.readInt()];

     int size = in.readInt();

     serializedInputSplit = new byte[size];

     in.readFully(serializedInputSplit);

   }

   @Override

   void writeRequest(DataOutput out) throws IOException {

     out.writeInt(splitType.ordinal());

     out.writeInt(serializedInputSplit.length);

     out.write(serializedInputSplit);

   }

   @Override

   public void doRequest(ServerData serverData) {

     serverData.getServiceWorker().getInputSplitsHandler().receivedInputSplit(

         splitType, serializedInputSplit);

   }

   @Override

   public RequestType getType() {

     return RequestType.REPLY_WITH_INPUT_SPLIT_REQUEST;

   }

 }