org.apache.hadoop.mapred.lib
Class NullOutputFormat<K,V>
java.lang.Object
org.apache.hadoop.mapred.lib.NullOutputFormat<K,V>
- All Implemented Interfaces:
- OutputFormat<K,V>
public class NullOutputFormat<K,V>
- extends Object
- implements OutputFormat<K,V>
Consume all outputs and put them in /dev/null.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NullOutputFormat
public NullOutputFormat()
getRecordWriter
public RecordWriter<K,V> getRecordWriter(FileSystem ignored,
JobConf job,
String name,
Progressable progress)
- Description copied from interface:
OutputFormat
- Get the
RecordWriter
for the given job.
- Specified by:
getRecordWriter
in interface OutputFormat<K,V>
job
- configuration for the job whose output is being written.name
- the unique name for this part of the output.progress
- mechanism for reporting progress while writing to file.
- Returns:
- a
RecordWriter
to write the output for the job.
checkOutputSpecs
public void checkOutputSpecs(FileSystem ignored,
JobConf job)
- Description copied from interface:
OutputFormat
- Check for validity of the output-specification for the job.
This is to validate the output specification for the job when it is
a job is submitted. Typically checks that it does not already exist,
throwing an exception when it already exists, so that output is not
overwritten.
- Specified by:
checkOutputSpecs
in interface OutputFormat<K,V>
job
- job configuration.
Copyright © 2009 The Apache Software Foundation