|
1
|
package eu.dnetlib.data.mapreduce.hbase.dedup;
|
|
2
|
|
|
3
|
import java.io.IOException;
|
|
4
|
import java.util.Properties;
|
|
5
|
|
|
6
|
import org.apache.hadoop.hbase.client.Put;
|
|
7
|
import org.apache.hadoop.hbase.client.Scan;
|
|
8
|
import org.apache.hadoop.hbase.filter.PrefixFilter;
|
|
9
|
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
|
|
10
|
import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;
|
|
11
|
import org.apache.hadoop.hbase.mapreduce.TableOutputFormat;
|
|
12
|
import org.apache.hadoop.hbase.util.Bytes;
|
|
13
|
import org.apache.hadoop.io.Text;
|
|
14
|
import org.apache.hadoop.mapreduce.Job;
|
|
15
|
|
|
16
|
import eu.dnetlib.data.mapreduce.JobParams;
|
|
17
|
import eu.dnetlib.data.mapreduce.hbase.AbstractHBaseMapReduceJob;
|
|
18
|
import eu.dnetlib.data.mapreduce.util.DedupUtils;
|
|
19
|
import eu.dnetlib.data.proto.TypeProtos.Type;
|
|
20
|
import eu.dnetlib.pace.util.DedupConfig;
|
|
21
|
import eu.dnetlib.pace.util.DedupConfigLoader;
|
|
22
|
|
|
23
|
public class DedupFindRootsJob extends AbstractHBaseMapReduceJob {
|
|
24
|
|
|
25
|
@Override
|
|
26
|
public Job setJobDetails(final Job job, final Properties p) {
|
|
27
|
|
|
28
|
initMapper(job, getScan(p), p.getProperty(JobParams.HBASE_SOURCE_TABLE));
|
|
29
|
|
|
30
|
job.setOutputFormatClass(TableOutputFormat.class);
|
|
31
|
job.setMapOutputKeyClass(Text.class);
|
|
32
|
job.setMapOutputValueClass(Put.class);
|
|
33
|
job.setNumReduceTasks(0);
|
|
34
|
|
|
35
|
job.getConfiguration().setBoolean("mapred.map.tasks.speculative.execution", false);
|
|
36
|
job.getConfiguration().setBoolean("mapreduce.map.speculative", false);
|
|
37
|
|
|
38
|
return job;
|
|
39
|
}
|
|
40
|
|
|
41
|
private Scan getScan(final Properties p) {
|
|
42
|
Scan scan = new Scan();
|
|
43
|
scan.setCaching(100); // 1 is the default in Scan, which will be bad for MapReduce jobs
|
|
44
|
scan.setCacheBlocks(false); // don't set to true for MR jobs
|
|
45
|
|
|
46
|
DedupConfig dedupConfig = DedupConfigLoader.load(p.getProperty("dedup.wf.conf"));
|
|
47
|
|
|
48
|
Type type = Type.valueOf(dedupConfig.getEntityType());
|
|
49
|
scan.setFilter(new PrefixFilter(Bytes.toBytes(type.getNumber())));
|
|
50
|
scan.addColumn(dedupConfig.getEntityNameBytes(), DedupUtils.BODY_B);
|
|
51
|
scan.addFamily(DedupUtils.getSimilarityCFBytes(type));
|
|
52
|
return scan;
|
|
53
|
}
|
|
54
|
|
|
55
|
private void initMapper(final Job job, final Scan scan, final String sourceTable) {
|
|
56
|
try {
|
|
57
|
TableMapReduceUtil.initTableMapperJob(sourceTable, scan, DedupFindRootsMapper.class, Text.class, ImmutableBytesWritable.class, job);
|
|
58
|
} catch (IOException e) {
|
|
59
|
throw new RuntimeException(e);
|
|
60
|
}
|
|
61
|
}
|
|
62
|
|
|
63
|
}
|