com.hazelcast.internal.eviction

Class EvictionPolicyComparator<K,V,E extends EvictableEntryView<K,V>>

java.lang.Object

com.hazelcast.internal.eviction.EvictionPolicyComparator<K,V,E>

All Implemented Interfaces:

Serializable, Comparator<E>

Direct Known Subclasses:

CacheEvictionPolicyComparator, LFUEvictionPolicyComparator, LRUEvictionPolicyComparator, RandomEvictionPolicyComparator

public abstract class EvictionPolicyComparator<K,V,E extends EvictableEntryView<K,V>>
extends Object
implements Comparator<E>, Serializable

A kind of Comparator to be used while comparing entries to be evicted.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	BOTH_OF_ENTRIES_HAVE_SAME_PRIORITY_TO_BE_EVICTED Integer constant for representing behaviour for giving same priority to both of entry to be evicted.
static int	FIRST_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED Integer constant for representing behaviour for giving higher priority to first entry to be evicted.
static int	SECOND_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED Integer constant for representing behaviour for giving higher priority to second entry to be evicted.

Constructor Summary

Constructors

Constructor and Description
EvictionPolicyComparator()

Method Summary

Modifier and Type	Method and Description
abstract int	compare(E e1, E e2) Compares the given EvictableEntryView instances and returns the result.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

FIRST_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED

public static final int FIRST_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED

Integer constant for representing behaviour for giving higher priority to first entry to be evicted.

See Also:

Constant Field Values

SECOND_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED

public static final int SECOND_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED

Integer constant for representing behaviour for giving higher priority to second entry to be evicted.

See Also:

Constant Field Values

BOTH_OF_ENTRIES_HAVE_SAME_PRIORITY_TO_BE_EVICTED

public static final int BOTH_OF_ENTRIES_HAVE_SAME_PRIORITY_TO_BE_EVICTED

Integer constant for representing behaviour for giving same priority to both of entry to be evicted.

See Also:

Constant Field Values

Constructor Detail

EvictionPolicyComparator

public EvictionPolicyComparator()

Method Detail

compare

public abstract int compare(E e1,
                            E e2)

Compares the given EvictableEntryView instances and returns the result. The result should be one of the

• #FIRST_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED
• #SECOND_ENTRY_HAS_HIGHER_PRIORITY_TO_BE_EVICTED
• #BOTH_OF_ENTRIES_HAVE_SAME_PRIORITY_TO_BE_EVICTED

Specified by:

compare in interface Comparator<E extends EvictableEntryView<K,V>>

Parameters:

e1 - the first EvictableEntryView instance to be compared

e2 - the second EvictableEntryView instance to be compared

Returns:

the result of comparison