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ReplyWithInputSplitRequest xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.giraph.comm.requests;
20  
21  import org.apache.giraph.comm.ServerData;
22  import org.apache.giraph.io.InputType;
23  
24  import java.io.DataInput;
25  import java.io.DataOutput;
26  import java.io.IOException;
27  
28  /**
29   * A request which master will send to workers to give them splits
30   */
31  public class ReplyWithInputSplitRequest extends WritableRequest
32      implements WorkerRequest {
33    /** Type of input split */
34    private InputType splitType;
35    /** Serialized input split */
36    private byte[] serializedInputSplit;
37  
38    /**
39     * Constructor
40     *
41     * @param splitType Type of input split
42     * @param serializedInputSplit Serialized input split
43     */
44    public ReplyWithInputSplitRequest(InputType splitType,
45        byte[] serializedInputSplit) {
46      this.splitType = splitType;
47      this.serializedInputSplit = serializedInputSplit;
48    }
49  
50    /**
51     * Constructor used for reflection only
52     */
53    public ReplyWithInputSplitRequest() {
54    }
55  
56    @Override
57    void readFieldsRequest(DataInput in) throws IOException {
58      splitType = InputType.values()[in.readInt()];
59      int size = in.readInt();
60      serializedInputSplit = new byte[size];
61      in.readFully(serializedInputSplit);
62    }
63  
64    @Override
65    void writeRequest(DataOutput out) throws IOException {
66      out.writeInt(splitType.ordinal());
67      out.writeInt(serializedInputSplit.length);
68      out.write(serializedInputSplit);
69    }
70  
71    @Override
72    public void doRequest(ServerData serverData) {
73      serverData.getServiceWorker().getInputSplitsHandler().receivedInputSplit(
74          splitType, serializedInputSplit);
75    }
76  
77    @Override
78    public RequestType getType() {
79      return RequestType.REPLY_WITH_INPUT_SPLIT_REQUEST;
80    }
81  }