Package org.apache.cassandra.io.sstable.keycache

Interface KeyCacheSupport<T extends SSTableReader & KeyCacheSupport<T>>

All Known Implementing Classes:

BigTableReader

public interface KeyCacheSupport<T extends SSTableReader & KeyCacheSupport<T>>

Method Summary

Modifier and Type	Method	Description
default void	cacheKey(DecoratedKey key, AbstractRowIndexEntry info)	Caches a key only if cache is available.
AbstractRowIndexEntry	deserializeKeyCacheValue(DataInputPlus input)
default AbstractRowIndexEntry	getCachedPosition(KeyCacheKey key, boolean updateStats)	Will return null if key is not found or cache is not available.
default AbstractRowIndexEntry	getCachedPosition(DecoratedKey key, boolean updateStats)	Will return null if key is not found or cache is not available.
default KeyCacheKey	getCacheKey(java.nio.ByteBuffer key)
default KeyCacheKey	getCacheKey(DecoratedKey key)
KeyCache	getKeyCache()
ClusteringBound<?>	getLowerBoundPrefixFromCache(DecoratedKey partitionKey, boolean isReversed)	Should quickly get a lower bound prefix from cache only if everything is already availabe in memory and does not need to be loaded from disk.
static boolean	isSupportedBy(SSTableFormat<?,?> format)

Method Detail

getKeyCache

@Nonnull
KeyCache getKeyCache()

getLowerBoundPrefixFromCache

@Nullable
ClusteringBound<?> getLowerBoundPrefixFromCache(DecoratedKey partitionKey,
                                                boolean isReversed)

Should quickly get a lower bound prefix from cache only if everything is already availabe in memory and does not need to be loaded from disk.

getCacheKey

@Nonnull
default KeyCacheKey getCacheKey(java.nio.ByteBuffer key)

getCacheKey

@Nonnull
default KeyCacheKey getCacheKey(DecoratedKey key)

getCachedPosition

@Nullable
default AbstractRowIndexEntry getCachedPosition(DecoratedKey key,
                                                boolean updateStats)

Will return null if key is not found or cache is not available.

getCachedPosition

@Nullable
default AbstractRowIndexEntry getCachedPosition(KeyCacheKey key,
                                                boolean updateStats)

Will return null if key is not found or cache is not available.

cacheKey

default void cacheKey(@Nonnull
                      DecoratedKey key,
                      @Nonnull
                      AbstractRowIndexEntry info)

Caches a key only if cache is available.

deserializeKeyCacheValue

@Nonnull
AbstractRowIndexEntry deserializeKeyCacheValue(@Nonnull
                                               DataInputPlus input)
                                        throws java.io.IOException

Throws:

java.io.IOException

isSupportedBy

static boolean isSupportedBy(SSTableFormat<?,?> format)