Package io.datarouter.filesystem.snapshot.cache

Class LatestBlockCache

java.lang.Object

io.datarouter.filesystem.snapshot.cache.LatestBlockCache

All Implemented Interfaces:

BlockLoader

public class LatestBlockCache
extends Object
implements BlockLoader

Simple implementation holds the most recent block of each type accessed. For sequential access we may read the same block many times in a row, in which case this cache allows skipping path generation, block loading, and checksumming. This is extremely optimized so the SnapshotReader doesn't need to think about caching. Numeric block indexes are stored to avoid path-building String concatenation.

Constructor Summary

Constructors

Constructor	Description
LatestBlockCache(SnapshotKey snapshotKey, BlockLoader blockLoader)

Method Summary

Modifier and Type	Method	Description
BranchBlock	branch(BlockKey key)
LeafBlock	leaf(BlockKey key)
io.datarouter.scanner.Scanner<LeafBlock>	leafRange(LeafBlockRangeLoader.LeafBlockRange range)
RootBlock	root(BlockKey key)
ValueBlock	value(BlockKey key)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.datarouter.filesystem.snapshot.reader.block.BlockLoader

get

Constructor Details

LatestBlockCache

public LatestBlockCache(SnapshotKey snapshotKey,
BlockLoader blockLoader)

Method Details

root

public RootBlock root(BlockKey key)

Specified by:

root in interface BlockLoader

branch

public BranchBlock branch(BlockKey key)

Specified by:

branch in interface BlockLoader

leaf

public LeafBlock leaf(BlockKey key)

Specified by:

leaf in interface BlockLoader

leafRange

public io.datarouter.scanner.Scanner<LeafBlock> leafRange(LeafBlockRangeLoader.LeafBlockRange range)

Specified by:

leafRange in interface BlockLoader

value

public ValueBlock value(BlockKey key)

Specified by:

value in interface BlockLoader