org.apache.cassandra.io.compress
Class CompressionMetadata.Writer

java.lang.Object
  java.io.RandomAccessFile
      org.apache.cassandra.io.compress.CompressionMetadata.Writer

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.io.DataOutput

Enclosing class:

CompressionMetadata

public static class CompressionMetadata.Writer
extends java.io.RandomAccessFile

Constructor Summary

CompressionMetadata.Writer(java.lang.String path)

Method Summary

long	chunkOffsetBy(int chunkIndex) Get a chunk offset by it's index.
void	finalizeHeader(long dataLength, int chunks)
void	resetAndTruncate(int chunkIndex) Reset the writer so that the next chunk offset written will be the one of chunkIndex.
void	writeHeader(CompressionParameters parameters)

Methods inherited from class java.io.RandomAccessFile

close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressionMetadata.Writer

public CompressionMetadata.Writer(java.lang.String path)
                           throws java.io.IOException

Throws:

java.io.IOException

Method Detail

writeHeader

public void writeHeader(CompressionParameters parameters)
                 throws java.io.IOException

Throws:

java.io.IOException

finalizeHeader

public void finalizeHeader(long dataLength,
                           int chunks)
                    throws java.io.IOException

Throws:

java.io.IOException

chunkOffsetBy

public long chunkOffsetBy(int chunkIndex)
                   throws java.io.IOException

Get a chunk offset by it's index.

Parameters:

chunkIndex - Index of the chunk.

Returns:

offset of the chunk in the compressed file.

Throws:

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

resetAndTruncate

public void resetAndTruncate(int chunkIndex)
                      throws java.io.IOException

Reset the writer so that the next chunk offset written will be the one of chunkIndex.

Throws:

java.io.IOException