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AddressesAndPartitionsRequest 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.graph.AddressesAndPartitionsWritable;
23  
24  import java.io.DataInput;
25  import java.io.DataOutput;
26  import java.io.IOException;
27  
28  /**
29   * Request for master sending addresses and partitions to workers
30   */
31  public class AddressesAndPartitionsRequest extends WritableRequest
32      implements WorkerRequest {
33    /** Addresses and partitions assignments */
34    private AddressesAndPartitionsWritable addressesAndPartitions;
35  
36    /** Constructor for reflection */
37    public AddressesAndPartitionsRequest() {
38    }
39  
40    /**
41     * Constructor
42     *
43     * @param addressesAndPartitions Addresses and partitions
44     */
45    public AddressesAndPartitionsRequest(
46        AddressesAndPartitionsWritable addressesAndPartitions) {
47      this.addressesAndPartitions = addressesAndPartitions;
48    }
49  
50    @Override
51    public void doRequest(ServerData serverData) {
52      serverData.getServiceWorker().addressesAndPartitionsReceived(
53          addressesAndPartitions);
54    }
55  
56    @Override
57    public RequestType getType() {
58      return RequestType.ADDRESSES_AND_PARTITIONS_REQUEST;
59    }
60  
61    @Override
62    void writeRequest(DataOutput output) throws IOException {
63      addressesAndPartitions.write(output);
64    }
65  
66    @Override
67    void readFieldsRequest(DataInput input) throws IOException {
68      addressesAndPartitions =
69          new AddressesAndPartitionsWritable();
70      addressesAndPartitions.readFields(input);
71    }
72  }