org.apache.hadoop.hbase.io.hfile

类 InclusiveCombinedBlockCache

java.lang.Object

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

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

所有已实现的接口:

Iterable<CachedBlock>, HeapSize, BlockCache, ResizableBlockCache

@InterfaceAudience.Private
public class InclusiveCombinedBlockCache
extends CombinedBlockCache

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

CombinedBlockCache.CombinedCacheStats

字段概要

从类继承的字段 org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

combinedCacheStats, l2Cache, onHeapCache

构造器概要

构造器

构造器和说明
InclusiveCombinedBlockCache(LruBlockCache l1, BlockCache l2)

方法概要

限定符和类型	方法和说明
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.

从类继承的方法 org.apache.hadoop.hbase.io.hfile.CombinedBlockCache

cacheBlock, evictBlocksByHfileName, getBlockCaches, getBlockCount, getCurrentDataSize, getCurrentSize, getDataBlockCount, getFreeSize, getMaxSize, getOnHeapCache, getRefCount, getStats, heapSize, iterator, returnBlock, setMaxSize, shutdown, size

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.lang.Iterable

forEach, spliterator

构造器详细资料

InclusiveCombinedBlockCache

public InclusiveCombinedBlockCache(LruBlockCache l1,
                                   BlockCache l2)

方法详细资料

getBlock

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

从接口复制的说明: BlockCache

Fetch block from cache.

指定者:

getBlock 在接口中 BlockCache

覆盖:

getBlock 在类中 CombinedBlockCache

参数:

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

返回:

Block or null if block is not in 2 cache.

cacheBlock

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

从接口复制的说明: BlockCache

Add block to cache.

指定者:

cacheBlock 在接口中 BlockCache

覆盖:

cacheBlock 在类中 CombinedBlockCache

参数:

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)

从接口复制的说明: BlockCache

Evict block from cache.

指定者:

evictBlock 在接口中 BlockCache

覆盖:

evictBlock 在类中 CombinedBlockCache

参数:

cacheKey - Block to evict

返回:

true if block existed and was evicted, false if not