blob: 0575506cc424e38fd6112e5b300a67f11a78d4ce (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package services;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.osoa.sca.annotations.Property;
public class WordCountImpl implements services.WordCount {
//this path is a HDFS path
@Property
Path inputPath = new Path("/file01.txt");
//this path is a HDFS path
@Property
Path outputPath = new Path("/output1");
public void runJob() {
org.apache.hadoop.examples.WordCount myCount = new org.apache.hadoop.examples.WordCount();
Configuration conf = new Configuration();
myCount.setConf(conf);
JobConf mapredConf = new JobConf(myCount.getConf(), org.apache.hadoop.examples.WordCount.class);
mapredConf.setJobName("wordcount");
// the keys are words (strings)
mapredConf.setOutputKeyClass(Text.class);
// the values are counts (ints)
mapredConf.setOutputValueClass(IntWritable.class);
mapredConf.setMapperClass(org.apache.hadoop.examples.WordCount.MapClass.class);
mapredConf.setCombinerClass(org.apache.hadoop.examples.WordCount.Reduce.class);
mapredConf.setReducerClass(org.apache.hadoop.examples.WordCount.Reduce.class);
mapredConf.setInputPath(inputPath);
mapredConf.setOutputPath(outputPath);
try {
JobClient.runJob(mapredConf);
}
catch(Exception e) {
System.out.println("ERROR: " + e);
}
}
}
|
