org.apache.cassandra.io.compress
Class CompressedRandomAccessReader

java.lang.Object
  java.io.RandomAccessFile
      org.apache.cassandra.io.util.RandomAccessReader
          org.apache.cassandra.io.compress.CompressedRandomAccessReader

All Implemented Interfaces:

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

public class CompressedRandomAccessReader
extends RandomAccessReader

Nested Class Summary

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

RandomAccessReader.BufferedRandomAccessFileMark

Field Summary

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

buffer, bufferOffset, current, DEFAULT_BUFFER_SIZE, markedPointer, MAX_BYTES_IN_PAGE_CACHE, validBufferBytes

Constructor Summary

CompressedRandomAccessReader(java.lang.String dataFilePath, CompressionMetadata metadata, boolean skipIOCache)

Method Summary

long	length()
static CompressionMetadata	metadata(java.lang.String dataFilePath) Get metadata about given compressed file including uncompressed data length, chunk size and list of the chunk offsets of the compressed data.
static RandomAccessReader	open(java.lang.String dataFilePath, boolean skipIOCache)
static RandomAccessReader	open(java.lang.String dataFilePath, CompressionMetadata metadata)
static RandomAccessReader	open(java.lang.String dataFilePath, CompressionMetadata metadata, boolean skipIOCache)
protected void	reBuffer() Read data from file starting from current currentOffset to populate buffer.
java.lang.String	toString()

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

bufferCursor, bytesPastMark, bytesPastMark, bytesRemaining, close, getFilePointer, getPath, isEOF, mark, open, open, open, open, open, read, read, read, readBytes, reset, reset, resetBuffer, seek, write, write, write

Methods inherited from class java.io.RandomAccessFile

getChannel, getFD, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, setLength, skipBytes, 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, wait, wait, wait

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Constructor Detail

CompressedRandomAccessReader

public CompressedRandomAccessReader(java.lang.String dataFilePath,
                                    CompressionMetadata metadata,
                                    boolean skipIOCache)
                             throws java.io.IOException

Throws:

java.io.IOException

Method Detail

metadata

public static CompressionMetadata metadata(java.lang.String dataFilePath)

Get metadata about given compressed file including uncompressed data length, chunk size and list of the chunk offsets of the compressed data.

Parameters:

dataFilePath - Path to the compressed file

Returns:

metadata about given compressed file.

open

public static RandomAccessReader open(java.lang.String dataFilePath,
                                      boolean skipIOCache)
                               throws java.io.IOException

Throws:

java.io.IOException

open

public static RandomAccessReader open(java.lang.String dataFilePath,
                                      CompressionMetadata metadata)
                               throws java.io.IOException

Throws:

java.io.IOException

open

public static RandomAccessReader open(java.lang.String dataFilePath,
                                      CompressionMetadata metadata,
                                      boolean skipIOCache)
                               throws java.io.IOException

Throws:

java.io.IOException

reBuffer

protected void reBuffer()
                 throws java.io.IOException

Description copied from class: RandomAccessReader

Read data from file starting from current currentOffset to populate buffer.

Overrides:

reBuffer in class RandomAccessReader

Throws:

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

length

public long length()
            throws java.io.IOException

Overrides:

length in class RandomAccessReader

Throws:

java.io.IOException

toString

public java.lang.String toString()

Overrides:

toString in class RandomAccessReader