org.apache.hadoop.hbase.io.hfile

Interface FirstLevelBlockCache

All Superinterfaces:

BlockCache, HeapSize, Iterable<CachedBlock>, ResizableBlockCache

All Known Implementing Classes:

IndexOnlyLruBlockCache, LruAdaptiveBlockCache, LruBlockCache, TinyLfuBlockCache

@InterfaceAudience.Private
public interface FirstLevelBlockCache
extends ResizableBlockCache, HeapSize

In-memory BlockCache that may be backed by secondary layer(s).

Method Summary

Modifier and Type	Method and Description
boolean	containsBlock(BlockCacheKey cacheKey) Whether the cache contains the block with specified cacheKey
void	setVictimCache(BlockCache victimCache) Specifies the secondary cache.

Methods inherited from interface org.apache.hadoop.hbase.io.hfile.ResizableBlockCache

setMaxSize

Methods inherited from interface org.apache.hadoop.hbase.io.hfile.BlockCache

cacheBlock, cacheBlock, evictBlock, evictBlocksByHfileName, getBlock, getBlockCaches, getBlockCount, getCurrentDataSize, getCurrentSize, getDataBlockCount, getFreeSize, getMaxSize, getStats, isMetaBlock, iterator, shutdown, size

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.apache.hadoop.hbase.io.HeapSize

heapSize

Method Detail

containsBlock

boolean containsBlock(BlockCacheKey cacheKey)

Whether the cache contains the block with specified cacheKey

Parameters:

cacheKey - cache key for the block

Returns:

true if it contains the block

setVictimCache

void setVictimCache(BlockCache victimCache)

Specifies the secondary cache. An entry that is evicted from this cache due to a size constraint will be inserted into the victim cache.

Parameters:

victimCache - the second level cache

Throws:

IllegalArgumentException - if the victim cache had already been set