Package org.apache.cassandra.io.util

Interface Rebufferer

All Superinterfaces:

AutoCloseable, ReaderFileProxy

All Known Implementing Classes:

BufferManagingRebufferer, BufferManagingRebufferer.Aligned, BufferManagingRebufferer.Unaligned, EmptyRebufferer, LimitingRebufferer, TailOverridingRebufferer, WrappingRebufferer

public interface Rebufferer
extends ReaderFileProxy

Rebufferer for reading data by a RandomAccessReader.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	Rebufferer.BufferHolder

Field Summary

Fields

Modifier and Type	Field	Description
static final Rebufferer.BufferHolder	EMPTY

Method Summary

Modifier and Type	Method	Description
void	closeReader()	Called when a reader is closed.
Rebufferer.BufferHolder	rebuffer(long position)	Rebuffer (move on or seek to) a given position, and return a buffer that can be used there.

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

channel, close, fileLength, getCrcCheckChance

Field Details

EMPTY

static final Rebufferer.BufferHolder EMPTY

Method Details

rebuffer

Rebufferer.BufferHolder rebuffer(long position)

Rebuffer (move on or seek to) a given position, and return a buffer that can be used there. The only guarantee about the size of the returned data is that unless rebuffering at the end of the file, the buffer will not be empty and will contain the requested position, i.e. offset <= position < offset + bh.buffer().limit(), but the buffer will not be positioned there.

closeReader

void closeReader()

Called when a reader is closed. Should clean up reader-specific data.