Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
SimpleSumCombiner |
|
| 2.0;2 |
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.examples; | |
20 | ||
21 | import java.io.IOException; | |
22 | import java.util.ArrayList; | |
23 | import java.util.List; | |
24 | ||
25 | import org.apache.hadoop.io.IntWritable; | |
26 | import org.apache.hadoop.io.LongWritable; | |
27 | ||
28 | import org.apache.giraph.graph.VertexCombiner; | |
29 | ||
30 | /** | |
31 | * Test whether combiner is called by summing up the messages. | |
32 | */ | |
33 | 3 | public class SimpleSumCombiner |
34 | extends VertexCombiner<LongWritable, IntWritable> { | |
35 | ||
36 | @Override | |
37 | public Iterable<IntWritable> combine(LongWritable vertexIndex, | |
38 | Iterable<IntWritable> messages) throws IOException { | |
39 | 2 | int sum = 0; |
40 | 2 | for (IntWritable msg : messages) { |
41 | 4 | sum += msg.get(); |
42 | } | |
43 | 2 | List<IntWritable> value = new ArrayList<IntWritable>(); |
44 | 2 | value.add(new IntWritable(sum)); |
45 | ||
46 | 2 | return value; |
47 | } | |
48 | } |