org.apache.cassandra.io.compress

Class CompressedRandomAccessReader

java.lang.Object

java.io.InputStream

org.apache.cassandra.io.util.AbstractDataInput

org.apache.cassandra.io.util.RandomAccessReader

org.apache.cassandra.io.compress.CompressedRandomAccessReader

All Implemented Interfaces:

java.io.Closeable, java.io.DataInput, java.lang.AutoCloseable, FileDataInput

Direct Known Subclasses:

CompressedThrottledReader

public class CompressedRandomAccessReader
extends RandomAccessReader

CRAR extends RAR to transparently uncompress blocks from the file into RAR.buffer. Most of the RAR "read bytes from the buffer, rebuffering when necessary" machinery works unchanged after that.

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, channel, DEFAULT_BUFFER_SIZE, markedPointer, owner

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CompressedRandomAccessReader(ChannelProxy channel, CompressionMetadata metadata, ICompressedFile file)

Method Summary

Modifier and Type	Method and Description
protected java.nio.ByteBuffer	allocateBuffer(int bufferSize, BufferType bufferType)
void	deallocate()
int	getTotalBufferSize()
long	length()
static CompressedRandomAccessReader	open(ChannelProxy channel, CompressionMetadata metadata)
static CompressedRandomAccessReader	open(ICompressedFile file)
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

bytesPastMark, bytesPastMark, bytesRemaining, close, current, getChannel, getFilePointer, getPath, getPosition, getPositionLimit, isEOF, mark, open, open, open, open, read, read, read, readBytes, reset, reset, seek

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

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

Methods inherited from class java.io.InputStream

available, mark, markSupported, skip

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

protected CompressedRandomAccessReader(ChannelProxy channel,
                                       CompressionMetadata metadata,
                                       ICompressedFile file)
                                throws java.io.FileNotFoundException

Throws:

java.io.FileNotFoundException

Method Detail

open

public static CompressedRandomAccessReader open(ChannelProxy channel,
                                                CompressionMetadata metadata)

open

public static CompressedRandomAccessReader open(ICompressedFile file)

allocateBuffer

protected java.nio.ByteBuffer allocateBuffer(int bufferSize,
                                             BufferType bufferType)

Overrides:

allocateBuffer in class RandomAccessReader

deallocate

public void deallocate()

Overrides:

deallocate in class RandomAccessReader

reBuffer

protected void reBuffer()

Description copied from class: RandomAccessReader

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

Overrides:

reBuffer in class RandomAccessReader

getTotalBufferSize

public int getTotalBufferSize()

Overrides:

getTotalBufferSize in class RandomAccessReader

length

public long length()

Overrides:

length in class RandomAccessReader

toString

public java.lang.String toString()

Overrides:

toString in class RandomAccessReader