@InterfaceAudience.Public @InterfaceStability.Stable public class MapRunner<K1,V1,K2,V2> extends Object implements MapRunnable<K1,V1,K2,V2>
MapRunnable
implementation.Constructor and Description |
---|
MapRunner() |
Modifier and Type | Method and Description |
---|---|
void |
configure(JobConf job)
Initializes a new instance from a
JobConf . |
protected Mapper<K1,V1,K2,V2> |
getMapper() |
void |
run(RecordReader<K1,V1> input,
OutputCollector<K2,V2> output,
Reporter reporter)
Start mapping input <key, value> pairs.
|
public MapRunner()
public void configure(JobConf job)
JobConfigurable
JobConf
.configure
in interface JobConfigurable
job
- the configurationpublic void run(RecordReader<K1,V1> input, OutputCollector<K2,V2> output, Reporter reporter) throws IOException
MapRunnable
Mapping of input records to output records is complete when this method returns.
run
in interface MapRunnable<K1,V1,K2,V2>
input
- the RecordReader
to read the input records.output
- the OutputCollector
to collect the outputrecords.reporter
- Reporter
to report progress, status-updates etc.IOException
Copyright © 2015 Apache Software Foundation. All rights reserved.