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

public class CompressedSequentialWriter
extends SequentialWriter

Nested Class Summary

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, out, stream, syncNeeded, validBufferBytes

Constructor Summary

CompressedSequentialWriter(java.io.File file, java.lang.String indexFilePath, boolean skipIOCache, CompressionParameters parameters, SSTableMetadata.Collector sstableMetadataCollector)

Method Summary

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()
static SequentialWriter	open(java.lang.String dataFilePath, java.lang.String indexFilePath, boolean skipIOCache, CompressionParameters parameters, SSTableMetadata.Collector sstableMetadataCollector)
void	resetAndTruncate(FileMark mark)
void	sync() Synchronize file contents with disk.

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

digest, flushInternal, getFilePointer, getPath, length, open, open, open, reBuffer, resetBuffer, setComputeDigest, syncInternal, truncate, 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 indexFilePath,
                                  boolean skipIOCache,
                                  CompressionParameters parameters,
                                  SSTableMetadata.Collector sstableMetadataCollector)
                           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

open

public static SequentialWriter open(java.lang.String dataFilePath,
                                    java.lang.String indexFilePath,
                                    boolean skipIOCache,
                                    CompressionParameters parameters,
                                    SSTableMetadata.Collector sstableMetadataCollector)
                             throws java.io.IOException

Throws:

java.io.IOException

getOnDiskFilePointer

public long getOnDiskFilePointer()
                          throws java.io.IOException

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

Throws:

java.io.IOException

sync

public void sync()
          throws java.io.IOException

Description copied from class: SequentialWriter

Synchronize file contents with disk.

Overrides:

sync in class SequentialWriter

Throws:

java.io.IOException - on any I/O error.

flush

public void flush()
           throws java.io.IOException

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

Throws:

java.io.IOException - on any I/O error.

flushData

protected void flushData()
                  throws java.io.IOException

Description copied from class: SequentialWriter

Override this method instead of overriding flush()

Overrides:

flushData in class SequentialWriter

Throws:

java.io.IOException - on any I/O error.

mark

public FileMark mark()

Overrides:

mark in class SequentialWriter

resetAndTruncate

public void resetAndTruncate(FileMark mark)
                      throws java.io.IOException

Overrides:

resetAndTruncate in class SequentialWriter

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Overrides:

close in class SequentialWriter

Throws:

java.io.IOException