alluxio.client.file.cache.evictor

Interface CacheEvictor

All Known Implementing Classes:

BlockPageEvictor, FIFOCacheEvictor, LFUCacheEvictor, LRUCacheEvictor, NondeterministicLRUCacheEvictor, TwoChoiceRandomEvictor, UnevictableCacheEvictor

@ThreadSafe
public interface CacheEvictor

Interface for client-side cache eviction policy. The implementation of this evictor must be thread-safe.

Method Summary

Modifier and Type	Method and Description
static CacheEvictor	create(CacheEvictorOptions options)
PageId	evict()
PageId	evictMatching(java.util.function.Predicate<PageId> criterion) Picks the first candidate for eviction that satisfies the given criterion.
void	reset() Resets the evictor.
void	updateOnDelete(PageId pageId) Updates evictor after a delete operation.
void	updateOnGet(PageId pageId) Updates evictor after a get operation.
void	updateOnPut(PageId pageId) Updates evictor after a put operation.

Method Detail

create

static CacheEvictor create(CacheEvictorOptions options)

Parameters:

options - cache evictor options

Returns:

a CacheEvictor instance

updateOnGet

void updateOnGet(PageId pageId)

Updates evictor after a get operation.

Parameters:

pageId - page identifier

updateOnPut

void updateOnPut(PageId pageId)

Updates evictor after a put operation.

Parameters:

pageId - page identifier

updateOnDelete

void updateOnDelete(PageId pageId)

Updates evictor after a delete operation.

Parameters:

pageId - page identifier

evict

@Nullable
PageId evict()

Returns:

a page to evict or null if no page available to evict

evictMatching

@Nullable
PageId evictMatching(java.util.function.Predicate<PageId> criterion)

Picks the first candidate for eviction that satisfies the given criterion.

Parameters:

criterion - criterion

Returns:

the eviction candidate, or null if none

reset

void reset()

Resets the evictor.