Package org.apache.cassandra.io.util

Class CompressedChunkReader

java.lang.Object

org.apache.cassandra.io.util.AbstractReaderFileProxy

org.apache.cassandra.io.util.CompressedChunkReader

All Implemented Interfaces:

AutoCloseable, ChunkReader, ReaderFileProxy, RebuffererFactory

Direct Known Subclasses:

CompressedChunkReader.Mmap, CompressedChunkReader.Standard

public abstract class CompressedChunkReader
extends AbstractReaderFileProxy
implements ChunkReader

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static interface	CompressedChunkReader.CompressedReader
static class	CompressedChunkReader.Mmap
static class	CompressedChunkReader.Standard

Field Summary

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

channel, fileLength

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CompressedChunkReader(ChannelProxy channel, CompressionMetadata metadata, Supplier<Double> crcCheckChanceSupplier)

Method Summary

Modifier and Type	Method	Description
int	chunkSize()	Buffer size required for this rebufferer.
protected CompressedChunkReader	forScan()
double	getCrcCheckChance()	Needed for tests.
Rebufferer	instantiateRebufferer(boolean isScan)
BufferType	preferredBufferType()	Specifies type of buffer the caller should attempt to give.
String	toString()

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

channel, close, fileLength

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.io.util.ChunkReader

readChunk, releaseUnderlyingResources

Methods inherited from interface org.apache.cassandra.io.util.ReaderFileProxy

channel, close, fileLength

Constructor Details

CompressedChunkReader

protected CompressedChunkReader(ChannelProxy channel,
 CompressionMetadata metadata,
 Supplier<Double> crcCheckChanceSupplier)

Method Details

forScan

protected CompressedChunkReader forScan()

getCrcCheckChance

public double getCrcCheckChance()

Description copied from interface: ReaderFileProxy

Needed for tests. Returns the table's CRC check chance, which is only set for compressed tables.

Specified by:

getCrcCheckChance in interface ReaderFileProxy

Overrides:

getCrcCheckChance in class AbstractReaderFileProxy

toString

public String toString()

Overrides:

toString in class AbstractReaderFileProxy

chunkSize

public int chunkSize()

Description copied from interface: ChunkReader

Buffer size required for this rebufferer. Must be power of 2 if alignment is required.

Specified by:

chunkSize in interface ChunkReader

preferredBufferType

public BufferType preferredBufferType()

Description copied from interface: ChunkReader

Specifies type of buffer the caller should attempt to give. This is not guaranteed to be fulfilled.

Specified by:

preferredBufferType in interface ChunkReader

instantiateRebufferer

public Rebufferer instantiateRebufferer(boolean isScan)

Specified by:

instantiateRebufferer in interface RebuffererFactory