KeyCacheSupport (apache-cassandra API)

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(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 Details
- 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(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 IOException
  
  Throws:
  
  IOException
- isSupportedBy
  
  static boolean isSupportedBy(SSTableFormat<?,?> format)