org.apache.hadoop.chukwa.datacollection.writer

Interface ChukwaWriter

All Known Subinterfaces:

PipelineableWriter

All Known Implementing Classes:

ConsoleWriter, Dedup, InMemoryWriter, LocalWriter, NullWriter, PipelineStageWriter, SeqFileWriter, SocketTeeWriter

public interface ChukwaWriter

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ChukwaWriter.COMMIT_PENDING COMMIT_PENDING should be returned if a writer has written data, but this data may ultimately disappear.
static class	ChukwaWriter.CommitStatus

Field Summary

Fields

Modifier and Type	Field and Description
static ChukwaWriter.CommitStatus	COMMIT_FAIL
static ChukwaWriter.CommitStatus	COMMIT_OK

Method Summary

Methods

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 c) Called once to initialize this writer.

Field Detail

COMMIT_OK

static final ChukwaWriter.CommitStatus COMMIT_OK

COMMIT_FAIL

static final ChukwaWriter.CommitStatus COMMIT_FAIL

Method Detail

init

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

Called once to initialize this writer.

Parameters:

c -

Throws:

WriterException

add

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

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().

Parameters:

chunks -

Returns:

Throws:

WriterException

close

void close()
           throws WriterException

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

Throws:

WriterException