org.apache.hadoop.chukwa.datacollection.test

Class FilePerPostWriter

java.lang.Object

org.apache.hadoop.chukwa.datacollection.writer.PipelineableWriter

org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter

org.apache.hadoop.chukwa.datacollection.test.FilePerPostWriter

All Implemented Interfaces:

ChukwaWriter

public class FilePerPostWriter
extends SeqFileWriter

A writer that writes a file for each post. Intended ONLY for architectural performance comparisons. Do not use this in production.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter

SeqFileWriter.StatReportingTask

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

ChukwaWriter.COMMIT_PENDING, ChukwaWriter.CommitStatus

Field Summary

Fields inherited from class org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter

FIXED_INTERVAL_OFFSET_OPT, IF_FIXED_INTERVAL_OPT, localHostAddr, OUTPUT_DIR_OPT, ROTATE_INTERVAL_OPT, STAT_PERIOD_OPT

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

COMMIT_FAIL, COMMIT_OK

Constructor Summary

Constructors

Constructor and Description
FilePerPostWriter()

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 org.apache.hadoop.chukwa.datacollection.writer.SeqFileWriter

getBytesWritten, setEnableRotationOnClose

Methods inherited from class org.apache.hadoop.chukwa.datacollection.writer.PipelineableWriter

setNextStage

Methods inherited from class java.lang.Object

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

Constructor Detail

FilePerPostWriter

public FilePerPostWriter()

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

Overrides:

add in class SeqFileWriter

Parameters:

chunks - is a list of data to send

Returns:

CommitStatus

Throws:

WriterException - if error writing data

close

public void close()

Description copied from interface: ChukwaWriter

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

Specified by:

close in interface ChukwaWriter

Overrides:

close in class SeqFileWriter

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

Overrides:

init in class SeqFileWriter

Parameters:

conf - is Chukwa configuration

Throws:

WriterException - if error writing data