edu.unh.sdb.datasource

Class ThreadedSliceCache

java.lang.Object

edu.unh.sdb.datasource.BlockCache

edu.unh.sdb.datasource.ThreadedSliceCache

public class ThreadedSliceCache
extends BlockCache

This cache is meant for use with slice iteration, and performs active prefetching using a separate IO thread.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	ThreadedSliceCache.SliceCacheIOThread

Field Summary

Fields

Modifier and Type	Field and Description
protected CacheDataBlock[]	blockArray
protected int	blockSliceDimension
protected int[]	datumCoords
protected int	dimensionality
protected ISBounds	dsSpaceBounds
protected int[]	dsSpaceDimensions
protected ISBounds	iterationSpaceBounds
protected int[]	iterationSpaceDimensions
protected int	lastBlockNumber
protected int[]	lowerDSSpaceCoords
protected int[]	lowerIterationSpaceCoords
protected int	numAttributes
protected int	numBlocks
protected ISBounds	queryBlockDstBounds
protected int	sliceAxis
protected ThreadedSliceCache.SliceCacheIOThread	sliceCacheIOThread
protected ISBounds	sourceQueryBounds
protected int[]	sQBLowerInts
protected int[]	sQBUpperInts
protected ISBounds	subblockQueryBounds
protected PhysicalDataSource	theSource
protected int[]	upperDSSpaceCoords
protected int[]	upperIterationSpaceCoords
protected int[]	upperQueryCoords

Fields inherited from class edu.unh.sdb.datasource.BlockCache

cacheBlockBounds, cacheBlockDimensions, numCacheBlocks, partitioningDimensions, spacePartitioning, spacePartitioningOrdering, tagAxisWeights

Constructor Summary

Constructors

Constructor and Description
ThreadedSliceCache(Indexable source, int sliceAxis, IndexSpaceID blockDimensions, ISBounds iteratorSpaceBounds, AxisOrdering cacheBlockOrdering)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	load(int blockNumber)

Methods inherited from class edu.unh.sdb.datasource.BlockCache

tagToBounds, tagToPartitioningCoords

Methods inherited from class java.lang.Object

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

Field Detail

blockArray

protected CacheDataBlock[] blockArray

sliceAxis

protected int sliceAxis

blockSliceDimension

protected int blockSliceDimension

sourceQueryBounds

protected ISBounds sourceQueryBounds

sQBLowerInts

protected int[] sQBLowerInts

sQBUpperInts

protected int[] sQBUpperInts

datumCoords

protected int[] datumCoords

upperQueryCoords

protected int[] upperQueryCoords

numBlocks

protected int numBlocks

lastBlockNumber

protected int lastBlockNumber

sliceCacheIOThread

protected ThreadedSliceCache.SliceCacheIOThread sliceCacheIOThread

subblockQueryBounds

protected ISBounds subblockQueryBounds

queryBlockDstBounds

protected ISBounds queryBlockDstBounds

theSource

protected PhysicalDataSource theSource

dimensionality

protected int dimensionality

numAttributes

protected int numAttributes

iterationSpaceBounds

protected ISBounds iterationSpaceBounds

lowerIterationSpaceCoords

protected int[] lowerIterationSpaceCoords

upperIterationSpaceCoords

protected int[] upperIterationSpaceCoords

iterationSpaceDimensions

protected int[] iterationSpaceDimensions

dsSpaceBounds

protected ISBounds dsSpaceBounds

lowerDSSpaceCoords

protected int[] lowerDSSpaceCoords

upperDSSpaceCoords

protected int[] upperDSSpaceCoords

dsSpaceDimensions

protected int[] dsSpaceDimensions

Constructor Detail

ThreadedSliceCache

public ThreadedSliceCache(Indexable source,
                  int sliceAxis,
                  IndexSpaceID blockDimensions,
                  ISBounds iteratorSpaceBounds,
                  AxisOrdering cacheBlockOrdering)

Method Detail

load

protected void load(int blockNumber)