org.apache.hadoop.chukwa.datacollection.writer

Class PipelineStageWriter

java.lang.Object

org.apache.hadoop.chukwa.datacollection.writer.PipelineStageWriter

All Implemented Interfaces:

ChukwaWriter

public class PipelineStageWriter
extends Object
implements ChukwaWriter

A pipeline of Pipelineable writers Controlled by option 'chukwaCollector.pipeline', which should be a comma- separated list of classnames.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.chukwa.datacollection.writer.ChukwaWriter

ChukwaWriter.COMMIT_PENDING, ChukwaWriter.CommitStatus

Field Summary

Fields inherited from interface org.apache.hadoop.chukwa.datacollection.writer.ChukwaWriter

COMMIT_FAIL, COMMIT_OK

Constructor Summary

Constructors

Constructor and Description
PipelineStageWriter()
PipelineStageWriter(org.apache.hadoop.conf.Configuration conf)

Method Summary

Modifier and Type	Method and Description
ChukwaWriter.CommitStatus	add(List<Chunk> chunks) Called repeatedly with data that should be serialized.
void	close() Called once, indicating that the writer should close files and prepare to exit.
void	init(org.apache.hadoop.conf.Configuration conf) Called once to initialize this writer.

Methods inherited from class java.lang.Object

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

Constructor Detail

PipelineStageWriter

public PipelineStageWriter()
                    throws WriterException

Throws:

WriterException

PipelineStageWriter

public PipelineStageWriter(org.apache.hadoop.conf.Configuration conf)
                    throws WriterException

Throws:

WriterException

Method Detail

add

public ChukwaWriter.CommitStatus add(List<Chunk> chunks)
                              throws WriterException

Description copied from interface: ChukwaWriter

Called repeatedly with data that should be serialized. Subclasses may assume that init() will be called before any calls to add(), and that add() won't be called after close().

Specified by:

add in interface ChukwaWriter

Returns:

CommitStatus

Throws:

WriterException

close

public void close()
           throws WriterException

Description copied from interface: ChukwaWriter

Called once, indicating that the writer should close files and prepare to exit.

Specified by:

close in interface ChukwaWriter

Throws:

WriterException

init

public void init(org.apache.hadoop.conf.Configuration conf)
          throws WriterException

Description copied from interface: ChukwaWriter

Called once to initialize this writer.

Specified by:

init in interface ChukwaWriter

Throws:

WriterException