org.apache.cassandra.io.compress
Class CompressedSequentialWriter

java.lang.Object
  extended by java.io.OutputStream
      extended by org.apache.cassandra.io.util.SequentialWriter
          extended by 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, syncDataOnlyInternal, 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)
Method Detail

open

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

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

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
Overrides:
close in class SequentialWriter


Copyright © 2013 The Apache Software Foundation