org.apache.cassandra.io.compress

Class CompressedSequentialWriter

java.lang.Object

java.io.OutputStream

org.apache.cassandra.io.util.SequentialWriter

org.apache.cassandra.io.compress.CompressedSequentialWriter

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable, java.nio.channels.Channel, java.nio.channels.WritableByteChannel

public class CompressedSequentialWriter
extends SequentialWriter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	CompressedSequentialWriter.CompressedFileWriterMark Class to hold a mark to the position of the file

Nested classes/interfaces inherited from class org.apache.cassandra.io.util.SequentialWriter

SequentialWriter.BufferedFileWriterMark

Field Summary

Fields inherited from class org.apache.cassandra.io.util.SequentialWriter

buffer, bufferOffset, current, isDirty, lastFlushOffset, out, runPostFlush, stream, syncNeeded, validBufferBytes

Constructor Summary

Constructors

Constructor and Description
CompressedSequentialWriter(java.io.File file, java.lang.String offsetsPath, CompressionParameters parameters, MetadataCollector sstableMetadataCollector)

Method Summary

Methods

Modifier and Type	Method and Description
void	abort()
void	close()
void	flush() If buffer is dirty, flush it's contents to the operating system.
protected void	flushData() Override this method instead of overriding flush()
long	getOnDiskFilePointer() Return the current file pointer of the underlying on-disk file.
FileMark	mark()
CompressionMetadata	open(long overrideLength, boolean isFinal)
void	resetAndTruncate(FileMark mark)
void	sync() Synchronize file contents with disk.
void	writeFullChecksum(Descriptor descriptor)

Methods inherited from class org.apache.cassandra.io.util.SequentialWriter

flushInternal, getFilePointer, getLastFlushOffset, getPath, isOpen, length, open, open, open, open, reBuffer, resetBuffer, setPostFlushListener, syncDataOnlyInternal, syncInternal, truncate, write, write, write, write

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressedSequentialWriter

public CompressedSequentialWriter(java.io.File file,
                          java.lang.String offsetsPath,
                          CompressionParameters parameters,
                          MetadataCollector sstableMetadataCollector)

Method Detail

getOnDiskFilePointer

public long getOnDiskFilePointer()

Description copied from class: SequentialWriter

Return the current file pointer of the underlying on-disk file. Note that since write works by buffering data, the value of this will increase by buffer size and not every write to the writer will modify this value. Furthermore, for compressed files, this value refers to compressed data, while the writer getFilePointer() refers to uncompressedFile

Overrides:

getOnDiskFilePointer in class SequentialWriter

sync

public void sync()

Description copied from class: SequentialWriter

Synchronize file contents with disk.

Overrides:

sync in class SequentialWriter

flush

public void flush()

Description copied from class: SequentialWriter

If buffer is dirty, flush it's contents to the operating system. Does not imply fsync(). Currently, for implementation reasons, this also invalidates the buffer.

Specified by:

flush in interface java.io.Flushable

Overrides:

flush in class SequentialWriter

flushData

protected void flushData()

Description copied from class: SequentialWriter

Override this method instead of overriding flush()

Overrides:

flushData in class SequentialWriter

open

public CompressionMetadata open(long overrideLength,
                       boolean isFinal)

mark

public FileMark mark()

Overrides:

mark in class SequentialWriter

resetAndTruncate

public void resetAndTruncate(FileMark mark)

Overrides:

resetAndTruncate in class SequentialWriter

close

public void close()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.nio.channels.Channel

Overrides:

close in class SequentialWriter

abort

public void abort()

Overrides:

abort in class SequentialWriter

writeFullChecksum

public void writeFullChecksum(Descriptor descriptor)

Overrides:

writeFullChecksum in class SequentialWriter