com.hazelcast.internal.eviction.impl.strategy.sampling

Class SamplingEvictionStrategy<A,E extends Evictable,S extends SampleableEvictableStore<A,E>>

java.lang.Object

com.hazelcast.internal.eviction.impl.strategy.sampling.SamplingEvictionStrategy<A,E,S>

public final class SamplingEvictionStrategy<A,E extends Evictable,S extends SampleableEvictableStore<A,E>>
extends Object

This strategy samples Evictable entries from SampleableEvictableStore, orders candidates for eviction according to the provided EvictionPolicyEvaluator.

Field Summary

Fields

Modifier and Type	Field and Description
static SamplingEvictionStrategy	INSTANCE

Method Summary

Modifier and Type	Method and Description
boolean	evict(S evictableStore, EvictionPolicyEvaluator<A,E> evictionPolicyEvaluator, EvictionChecker evictionChecker, EvictionListener<A,E> evictionListener) Does eviction if required.
protected boolean	evictInternal(S sampleableEvictableStore, EvictionPolicyEvaluator<A,E> evictionPolicyEvaluator, EvictionListener<A,E> evictionListener) Processes sampling based eviction logic on SampleableEvictableStore.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final SamplingEvictionStrategy INSTANCE

Method Detail

evict

public boolean evict(S evictableStore,
                     EvictionPolicyEvaluator<A,E> evictionPolicyEvaluator,
                     EvictionChecker evictionChecker,
                     EvictionListener<A,E> evictionListener)

Does eviction if required.

Parameters:

evictableStore - Store that holds Evictable entries

evictionPolicyEvaluator - EvictionPolicyEvaluator to evaluate EvictionPolicy on entries

evictionChecker - EvictionChecker to check whether max size is reached, therefore eviction is required or not.

evictionListener - EvictionListener to listen evicted entries

Returns:

true is an entry was evicted, otherwise false

evictInternal

protected boolean evictInternal(S sampleableEvictableStore,
                                EvictionPolicyEvaluator<A,E> evictionPolicyEvaluator,
                                EvictionListener<A,E> evictionListener)

Processes sampling based eviction logic on SampleableEvictableStore.

Parameters:

sampleableEvictableStore - SampleableEvictableStore that holds Evictable entries

evictionPolicyEvaluator - EvictionPolicyEvaluator to evaluate

evictionListener - EvictionListener to listen evicted entries

Returns:

true is an entry was evicted, otherwise false