com.hazelcast.replicatedmap.merge

Class LatestUpdateMapMergePolicy

java.lang.Object

com.hazelcast.replicatedmap.merge.LatestUpdateMapMergePolicy

All Implemented Interfaces:

ReplicatedMapMergePolicy, Serializable

public class LatestUpdateMapMergePolicy
extends Object
implements ReplicatedMapMergePolicy

LatestUpdateMapMergePolicy causes the merging entry to be merged from source to destination map if source entry has updated more recently than the destination entry.

This policy can only be used of the clocks of the machines are in sync.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
LatestUpdateMapMergePolicy()

Method Summary

Methods

Modifier and Type	Method and Description
Object	merge(String mapName, ReplicatedMapEntryView mergingEntry, ReplicatedMapEntryView existingEntry) Returns the value of the entry after the merge of entries with the same key.

Methods inherited from class java.lang.Object

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

Constructor Detail

LatestUpdateMapMergePolicy

public LatestUpdateMapMergePolicy()

Method Detail

merge

public Object merge(String mapName,
           ReplicatedMapEntryView mergingEntry,
           ReplicatedMapEntryView existingEntry)

Description copied from interface: ReplicatedMapMergePolicy

Returns the value of the entry after the merge of entries with the same key. You should consider the case where existingEntry's value is null.

Specified by:

merge in interface ReplicatedMapMergePolicy

Parameters:

mapName - name of the replicated map

mergingEntry - entry merging into the destination cluster

existingEntry - existing entry in the destination cluster

Returns:

final value of the entry. If returns null, then the entry will be removed.