org.apache.hadoop.chukwa.datacollection.writer

Class InMemoryWriter

java.lang.Object

org.apache.hadoop.chukwa.datacollection.writer.InMemoryWriter

All Implemented Interfaces:

ChukwaWriter

public class InMemoryWriter
extends Object
implements ChukwaWriter

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
InMemoryWriter()

Method Summary

Modifier and Type	Method and Description
void	add(Chunk data)
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.
Chunk	readOutChunk(int bytes, int ms) Try to read bytes, waiting up to ms

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemoryWriter

public InMemoryWriter()

Method Detail

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

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

Parameters:

conf - is Chukwa configuration

Throws:

WriterException - if error writing data

add

public void add(Chunk data)
         throws WriterException

Throws:

WriterException

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

Parameters:

chunks - is a list of data to send

Returns:

CommitStatus

Throws:

WriterException - if error writing data

readOutChunk

public Chunk readOutChunk(int bytes,
                          int ms)
                   throws IOException

Try to read bytes, waiting up to ms

Parameters:

bytes - amount to try to read

ms - time to wait

Returns:

a newly read-in chunk

Throws:

IOException - if error reading data