org.apache.accumulo.core.file.blockfile.cache
Interface BlockCache

All Known Implementing Classes:

LruBlockCache, SimpleBlockCache

public interface BlockCache

Block cache interface. TODO: Add filename or hash of filename to block cache key.

Method Summary

void	cacheBlock(String blockName, byte[] buf) Add block to cache (defaults to not in-memory).
void	cacheBlock(String blockName, byte[] buf, boolean inMemory) Add block to cache.
byte[]	getBlock(String blockName) Fetch block from cache.
void	shutdown() Shutdown the cache.

Method Detail

cacheBlock

void cacheBlock(String blockName,
                byte[] buf,
                boolean inMemory)

Add block to cache.

Parameters:

blockName - Zero-based file block number.

buf - The block contents wrapped in a ByteBuffer.

inMemory - Whether block should be treated as in-memory

cacheBlock

void cacheBlock(String blockName,
                byte[] buf)

Add block to cache (defaults to not in-memory).

Parameters:

blockName - Zero-based file block number.

buf - The block contents wrapped in a ByteBuffer.

getBlock

byte[] getBlock(String blockName)

Fetch block from cache.

Parameters:

blockName - Block number to fetch.

Returns:

Block or null if block is not in the cache.

shutdown

void shutdown()

Shutdown the cache.