org.apache.cassandra.hadoop
Class ColumnFamilyOutputFormat.NullOutputCommitter

java.lang.Object
  org.apache.hadoop.mapreduce.OutputCommitter
      org.apache.cassandra.hadoop.ColumnFamilyOutputFormat.NullOutputCommitter

Enclosing class:

ColumnFamilyOutputFormat

public static class ColumnFamilyOutputFormat.NullOutputCommitter
extends org.apache.hadoop.mapreduce.OutputCommitter

An OutputCommitter that does nothing.

Constructor Summary

ColumnFamilyOutputFormat.NullOutputCommitter()

Method Summary

void	abortTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext) Discard the task output
void	cleanupJob(org.apache.hadoop.mapreduce.JobContext jobContext) For cleaning up the job's output after job completion
void	commitTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext) To promote the task's temporary output to final output location The task's output is moved to the job's output directory.
boolean	needsTaskCommit(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext) Check whether task needs a commit
void	setupJob(org.apache.hadoop.mapreduce.JobContext jobContext) For the framework to setup the job output during initialization
void	setupTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext) Sets up output for the task.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnFamilyOutputFormat.NullOutputCommitter

public ColumnFamilyOutputFormat.NullOutputCommitter()

Method Detail

abortTask

public void abortTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

Discard the task output

Specified by:

abortTask in class org.apache.hadoop.mapreduce.OutputCommitter

cleanupJob

public void cleanupJob(org.apache.hadoop.mapreduce.JobContext jobContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

For cleaning up the job's output after job completion

Specified by:

cleanupJob in class org.apache.hadoop.mapreduce.OutputCommitter

Parameters:

jobContext - Context of the job whose output is being written.

commitTask

public void commitTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

To promote the task's temporary output to final output location The task's output is moved to the job's output directory.

Specified by:

commitTask in class org.apache.hadoop.mapreduce.OutputCommitter

Parameters:

taskContext - Context of the task whose output is being written.

needsTaskCommit

public boolean needsTaskCommit(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

Check whether task needs a commit

Specified by:

needsTaskCommit in class org.apache.hadoop.mapreduce.OutputCommitter

Returns:

true/false

setupJob

public void setupJob(org.apache.hadoop.mapreduce.JobContext jobContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

For the framework to setup the job output during initialization

Specified by:

setupJob in class org.apache.hadoop.mapreduce.OutputCommitter

Parameters:

jobContext - Context of the job whose output is being written.

setupTask

public void setupTask(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)

Description copied from class: org.apache.hadoop.mapreduce.OutputCommitter

Sets up output for the task.

Specified by:

setupTask in class org.apache.hadoop.mapreduce.OutputCommitter

Parameters:

taskContext - Context of the task whose output is being written.