Package com.hazelcast.map

Interface MapEvictionPolicyComparator<K,​V>

Type Parameters:
K - type of the key
V - type of the value
All Superinterfaces:
Comparator<EntryView<K,​V>>, EvictionPolicyComparator<K,​V,​EntryView<K,​V>>, Serializable
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface
public interface MapEvictionPolicyComparator<K,​V>
extends EvictionPolicyComparator<K,​V,​EntryView<K,​V>>
IMap specific EvictionPolicyComparator for comparing EntryViews to be evicted. Implementors of the comparator have to implement equals and hashCode methods to support correct config comparison. Note that you may need to enable per entry stats via MapConfig.setPerEntryStatsEnabled(boolean) to see all fields of entry view in your implementation.
See Also:
EvictionPolicyComparator, EntryView, MapConfig.setPerEntryStatsEnabled(boolean)

  • Method Details

    • compare

      int compare​(EntryView<K,​V> o1, EntryView<K,​V> o2)
      Compares the given EntryView instances and returns the result. The result should be one of
      • -1: first entry has higher priority to be evicted
      • 1: second entry has higher priority to be evicted
      • 0: both entries have same priority
      Specified by:
      compare in interface Comparator<K>
      Parameters:
      o1 - the first EntryView instance to be compared
      o2 - the second EntryView instance to be compared
      Returns:
      the result of comparison