org.apache.hadoop.mapred
Class MapReduceBase
java.lang.Object
org.apache.hadoop.mapred.MapReduceBase
- All Implemented Interfaces:
- Closeable, JobConfigurable
- Direct Known Subclasses:
- CopyFiles.CopyFilesMapper, IdentityMapper, IdentityReducer, InverseMapper, Logalyzer.LogRegexMapper, LongSumReducer, PiEstimator.PiMapper, PiEstimator.PiReducer, RegexMapper, TokenCountMapper, WordCount.MapClass, WordCount.Reduce
public class MapReduceBase
- extends Object
- implements Closeable, JobConfigurable
Base class for Mapper
and Reducer
implementations.
Provides default implementations for a few methods.
- Author:
- Owen O'Malley
Method Summary |
void |
close()
Default implementation that does nothing. |
void |
configure(JobConf job)
Default implementation that does nothing. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
MapReduceBase
public MapReduceBase()
close
public void close()
throws IOException
- Default implementation that does nothing.
- Specified by:
close
in interface Closeable
- Throws:
IOException
configure
public void configure(JobConf job)
- Default implementation that does nothing.
- Specified by:
configure
in interface JobConfigurable
- Parameters:
job
- the configuration
Copyright © 2006 The Apache Software Foundation