Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
BspInputSplit |
|
| 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.bsp; | |
20 | ||
21 | import java.io.DataInput; | |
22 | import java.io.DataOutput; | |
23 | import java.io.IOException; | |
24 | ||
25 | import org.apache.hadoop.io.Writable; | |
26 | import org.apache.hadoop.mapreduce.InputSplit; | |
27 | ||
28 | /** | |
29 | * This InputSplit will not give any ordering or location data. | |
30 | * It is used internally by BspInputFormat (which determines | |
31 | * how many tasks to run the application on). Users should not use this | |
32 | * directly. | |
33 | */ | |
34 | public class BspInputSplit extends InputSplit implements Writable { | |
35 | /** Number of splits */ | |
36 | 89 | private int numSplits = -1; |
37 | /** Split index */ | |
38 | 89 | private int splitIndex = -1; |
39 | ||
40 | /** | |
41 | * Reflection constructor. | |
42 | */ | |
43 | 136 | public BspInputSplit() { } |
44 | ||
45 | /** | |
46 | * Constructor used by {@link BspInputFormat}. | |
47 | * | |
48 | * @param splitIndex Index of this split. | |
49 | * @param numSplits Total number of splits. | |
50 | */ | |
51 | 21 | public BspInputSplit(int splitIndex, int numSplits) { |
52 | 21 | this.splitIndex = splitIndex; |
53 | 21 | this.numSplits = numSplits; |
54 | 21 | } |
55 | ||
56 | @Override | |
57 | public long getLength() throws IOException, InterruptedException { | |
58 | 24 | return 0; |
59 | } | |
60 | ||
61 | @Override | |
62 | public String[] getLocations() throws IOException, InterruptedException { | |
63 | 44 | return new String[]{}; |
64 | } | |
65 | ||
66 | @Override | |
67 | public void readFields(DataInput in) throws IOException { | |
68 | 44 | splitIndex = in.readInt(); |
69 | 44 | numSplits = in.readInt(); |
70 | 44 | } |
71 | ||
72 | @Override | |
73 | public void write(DataOutput out) throws IOException { | |
74 | 45 | out.writeInt(splitIndex); |
75 | 45 | out.writeInt(numSplits); |
76 | 45 | } |
77 | ||
78 | /** | |
79 | * Get the index of this split. | |
80 | * | |
81 | * @return Index of this split. | |
82 | */ | |
83 | public int getSplitIndex() { | |
84 | 116 | return splitIndex; |
85 | } | |
86 | ||
87 | /** | |
88 | * Get the number of splits for this application. | |
89 | * | |
90 | * @return Total number of splits. | |
91 | */ | |
92 | public int getNumSplits() { | |
93 | 116 | return numSplits; |
94 | } | |
95 | ||
96 | @Override | |
97 | public String toString() { | |
98 | 20 | return "'" + getClass().getCanonicalName() + |
99 | ", index=" + getSplitIndex() + ", num=" + getNumSplits(); | |
100 | } | |
101 | } |