Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BooleanOverwriteAggregator |
|
| 1.0;1 |
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.aggregators; | |
20 | ||
21 | import org.apache.hadoop.io.BooleanWritable; | |
22 | ||
23 | /** | |
24 | * Aggregator that stores a value that is overwritten once another value is | |
25 | * aggregated. This aggregator is useful for one-to-many communication from | |
26 | * master.compute() or from a special vertex. In case multiple vertices write | |
27 | * to this aggregator, its behavior is non-deterministic. The default value | |
28 | * for this aggregator is false. | |
29 | */ | |
30 | 0 | public class BooleanOverwriteAggregator extends |
31 | BasicAggregator<BooleanWritable> { | |
32 | @Override | |
33 | public void aggregate(BooleanWritable value) { | |
34 | 0 | getAggregatedValue().set(value.get()); |
35 | 0 | } |
36 | ||
37 | @Override | |
38 | public BooleanWritable createInitialValue() { | |
39 | 0 | return new BooleanWritable(false); |
40 | } | |
41 | } |