58 lines
1.3 KiB
Java
58 lines
1.3 KiB
Java
package ParallelSecondo;
|
|
|
|
import java.io.IOException;
|
|
|
|
import org.apache.hadoop.io.BooleanWritable;
|
|
import org.apache.hadoop.io.IntWritable;
|
|
import org.apache.hadoop.io.Text;
|
|
import org.apache.hadoop.mapreduce.Reducer;
|
|
|
|
import sj.lang.ListExpr;
|
|
|
|
public class PS_HadoopMap2_Reduce
|
|
extends Reducer<Text, BooleanWritable, IntWritable, Text>
|
|
implements Constant
|
|
{
|
|
|
|
boolean AgggregateResult = true;
|
|
ListExpr resultList, last;
|
|
int cnt = 0;
|
|
boolean createObj;
|
|
|
|
@Override
|
|
protected void reduce(Text key, Iterable<BooleanWritable> values,
|
|
Context context) throws IOException,
|
|
InterruptedException {
|
|
|
|
|
|
for (BooleanWritable taskResult : values)
|
|
{
|
|
|
|
String[] rowInfo = key.toString().split(" ");
|
|
|
|
int rowIdx = Integer.parseInt(rowInfo[0]);
|
|
int slaveIdx = Integer.parseInt(rowInfo[1]);
|
|
createObj = taskResult.get();
|
|
AgggregateResult &= createObj;
|
|
|
|
if (createObj)
|
|
{
|
|
resultList = ListExpr.concat(resultList,
|
|
ListExpr.twoElemList(
|
|
ListExpr.intAtom(rowIdx),
|
|
ListExpr.intAtom(slaveIdx)));
|
|
cnt++;
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void cleanup(Context context)
|
|
throws IOException, InterruptedException {
|
|
|
|
context.write(new IntWritable(cnt),
|
|
new Text(resultList.toString().
|
|
replaceAll("\n", " ").replaceAll("\t", " ")));
|
|
}
|
|
}
|