org.apache.hadoop.hbase.io.hfile

Class InclusiveCombinedBlockCache

java.lang.Object

org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

org.apache.hadoop.hbase.io.hfile.InclusiveCombinedBlockCache

All Implemented Interfaces:

Iterable<CachedBlock>, HeapSize, BlockCache, ResizableBlockCache

@InterfaceAudience.Private
public class InclusiveCombinedBlockCache
extends CombinedBlockCache

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

CombinedBlockCache.CombinedCacheStats

Field Summary

Fields inherited from class org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

combinedCacheStats, l1Cache, l2Cache

Constructor Summary

Constructors

Constructor and Description
InclusiveCombinedBlockCache(FirstLevelBlockCache l1, BlockCache l2)

Method Summary

Modifier and Type	Method and Description
void	cacheBlock(BlockCacheKey cacheKey, Cacheable buf, boolean inMemory) Add block to cache.
boolean	evictBlock(BlockCacheKey cacheKey) Evict block from cache.
Cacheable	getBlock(BlockCacheKey cacheKey, boolean caching, boolean repeat, boolean updateCacheMetrics) Fetch block from cache.

Methods inherited from class org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

cacheBlock, evictBlocksByHfileName, getBlockCaches, getBlockCount, getCurrentDataSize, getCurrentSize, getDataBlockCount, getFirstLevelCache, getFreeSize, getMaxSize, getRpcRefCount, getSecondLevelCache, getStats, heapSize, iterator, setMaxSize, shutdown, size

Methods inherited from class java.lang.Object

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

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

isMetaBlock

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

InclusiveCombinedBlockCache

public InclusiveCombinedBlockCache(FirstLevelBlockCache l1,
                                   BlockCache l2)

Method Detail

getBlock

public Cacheable getBlock(BlockCacheKey cacheKey,
                          boolean caching,
                          boolean repeat,
                          boolean updateCacheMetrics)

Description copied from interface: BlockCache

Fetch block from cache.

Specified by:

getBlock in interface BlockCache

Overrides:

getBlock in class CombinedBlockCache

Parameters:

cacheKey - Block to fetch.

caching - Whether this request has caching enabled (used for stats)

repeat - Whether this is a repeat lookup for the same block (used to avoid double counting cache misses when doing double-check locking)

updateCacheMetrics - Whether to update cache metrics or not

Returns:

Block or null if block is not in 2 cache.

cacheBlock

public void cacheBlock(BlockCacheKey cacheKey,
                       Cacheable buf,
                       boolean inMemory)

Description copied from interface: BlockCache

Add block to cache.

Specified by:

cacheBlock in interface BlockCache

Overrides:

cacheBlock in class CombinedBlockCache

Parameters:

cacheKey - The block's cache key.

buf - The block contents wrapped in a ByteBuffer.

inMemory - Whether block should be treated as in-memory. This parameter is only useful for the L1 lru cache.

evictBlock

public boolean evictBlock(BlockCacheKey cacheKey)

Description copied from interface: BlockCache

Evict block from cache.

Specified by:

evictBlock in interface BlockCache

Overrides:

evictBlock in class CombinedBlockCache

Parameters:

cacheKey - Block to evict

Returns:

true if block existed and was evicted, false if not