Package com.qfs.multiversion

Interface IDiscardableChunkComponent

All Superinterfaces:

ICompressible, IMemoryMonitored

All Known Subinterfaces:

IMultiVersionConcreteReference

All Known Implementing Classes:

AMultiVersionConcreteReference, AMultiVersionSecondaryRecordIndex, ChunkedIntegerArray, ChunkedLongArray, ColumnInteger, ColumnLong, MultiVersionCompositeSecondaryRecordIndex, MultiVersionIntegerArray, MultiVersionLazyDeleteLinkedIndex, MultiVersionLongArray, MultiVersionNoIndexConcreteReference, MultiVersionSecondaryConcreteReference, MultiVersionSecondaryRecordIndex, MultiVersionUniqueConcreteReference

public interface IDiscardableChunkComponent
extends IMemoryMonitored, ICompressible

A chunk-based component whose data can be discarded on a chunk basis.

When a whole chunk of its data is known to be unreachable by the system, the component is informed that this chunk can be discarded.

Author:

ActiveViam

Method Summary

Modifier and Type	Method	Description
Runnable	discardChunk(int chunkId)	Discards the chunk of data with the given ID.
boolean	isChunkDiscarded(int chunkId)	Returns whether the chunk with the given id has been discarded or not.

Methods inherited from interface com.qfs.memory.ICompressible

compress, compress

Methods inherited from interface com.qfs.monitoring.memory.IMemoryMonitored

getMemoryStatistic

Method Details

discardChunk

Runnable discardChunk(int chunkId)

Discards the chunk of data with the given ID.

The given chunk is guaranteed not to be accessed anymore.

Parameters:

chunkId - the id of the discarded chunk

Returns:

the runnable to run to actually discard the chunk

isChunkDiscarded

boolean isChunkDiscarded(int chunkId)

Returns whether the chunk with the given id has been discarded or not.

Parameters:

chunkId - the chunk id

Returns:

true if the given chunk has been discarded, false otherwise