com.datasalt.pangool.tuplemr.mapred
Class MapOnlyMapper<I1,I2,O1,O2>

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<I1,I2,O1,O2>
      com.datasalt.pangool.tuplemr.mapred.MapOnlyMapper<I1,I2,O1,O2>

All Implemented Interfaces:

Serializable

public abstract class MapOnlyMapper<I1,I2,O1,O2>
extends org.apache.hadoop.mapreduce.Mapper<I1,I2,O1,O2>
implements Serializable

Mapper to be implemented by Map-only jobs.

See Also:

MapOnlyJobBuilder, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

MapOnlyMapper()

Method Summary

protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context, MultipleOutputsCollector mOuts) Override this method, not the other declared as final.
protected void	map(I1 key, I2 value, org.apache.hadoop.mapreduce.Mapper.Context context)
protected void	map(I1 key, I2 value, org.apache.hadoop.mapreduce.Mapper.Context context, MultipleOutputsCollector collector)
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context) Deprecated. This method shouldn't be implemented, otherwise MultipleOutputs may not work. When implemented, super.setup() should be called if MultipleOutputs are to be used. Therefore we have created another signature with the MultipleOutputsCollector in order to avoid this, which will be the official setup() method in the future (this one will be declared final in further versions).
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context, MultipleOutputsCollector mOuts) Override this method, not the other one.

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

run

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapOnlyMapper

public MapOnlyMapper()

Method Detail

map

protected void map(I1 key,
                   I2 value,
                   org.apache.hadoop.mapreduce.Mapper.Context context,
                   MultipleOutputsCollector collector)
            throws IOException,
                   InterruptedException

Throws:

IOException

InterruptedException

map

protected void map(I1 key,
                   I2 value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<I1,I2,O1,O2>

Throws:

IOException

InterruptedException

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context,
                     MultipleOutputsCollector mOuts)
              throws IOException,
                     InterruptedException

Override this method, not the other one. This one will be automatically called by the default setup() after initializing MultipleOutputs.

Throws:

IOException

InterruptedException

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws IOException,
                     InterruptedException

Deprecated. This method shouldn't be implemented, otherwise MultipleOutputs may not work. When implemented, super.setup() should be called if MultipleOutputs are to be used. Therefore we have created another signature with the MultipleOutputsCollector in order to avoid this, which will be the official setup() method in the future (this one will be declared final in further versions).

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<I1,I2,O1,O2>

Throws:

IOException

InterruptedException

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context,
                       MultipleOutputsCollector mOuts)
                throws IOException,
                       InterruptedException

Override this method, not the other declared as final.

Throws:

IOException

InterruptedException

cleanup

protected final void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
                      throws IOException,
                             InterruptedException

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Mapper<I1,I2,O1,O2>

Throws:

IOException

InterruptedException