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, 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, CACHE_FLUSH_INTERVAL_IN_BYTES, channel, current, DEFAULT_BUFFER_SIZE, markedPointer, owner, validBufferBytes

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CompressedRandomAccessReader(java.lang.String dataFilePath, CompressionMetadata metadata, boolean skipIOCache, PoolingSegmentedFile owner)

Method Summary

Methods

Modifier and Type	Method and Description
long	length()
static CompressedRandomAccessReader	open(java.lang.String dataFilePath, CompressionMetadata metadata, boolean skipIOCache)
static CompressedRandomAccessReader	open(java.lang.String path, CompressionMetadata metadata, CompressedPoolingSegmentedFile owner)
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, deallocate, getFilePointer, getPath, isEOF, mark, 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

protected CompressedRandomAccessReader(java.lang.String dataFilePath,
                            CompressionMetadata metadata,
                            boolean skipIOCache,
                            PoolingSegmentedFile owner)
                                throws java.io.FileNotFoundException

Throws:

java.io.FileNotFoundException

Method Detail

open

public static CompressedRandomAccessReader open(java.lang.String path,
                                CompressionMetadata metadata,
                                CompressedPoolingSegmentedFile owner)

open

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

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

length

public long length()

Overrides:

length in class RandomAccessReader

toString

public java.lang.String toString()

Overrides:

toString in class RandomAccessReader