com.hazelcast.spi.merge

Class LatestUpdateMergePolicy<V,T extends MergingLastUpdateTime<V>>

java.lang.Object

com.hazelcast.spi.impl.merge.AbstractSplitBrainMergePolicy<V,T>

com.hazelcast.spi.merge.LatestUpdateMergePolicy<V,T>

Type Parameters:

V - the type of the merged value

T - the type of the merging value

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, SplitBrainMergePolicy<V,T>

public class LatestUpdateMergePolicy<V,T extends MergingLastUpdateTime<V>>
extends AbstractSplitBrainMergePolicy<V,T>

Merges data structure entries from source to destination data structure if the source entry was updated more frequently than the destination entry.

Note: This policy can only be used if the clocks of the nodes are in sync.

Since:

3.10

Constructor Summary

Constructors

Constructor and Description
LatestUpdateMergePolicy()

Method Summary

Modifier and Type	Method and Description
int	getClassId() Returns type identifier for this class.
V	merge(T mergingValue, T existingValue) Selects the value of either the merging or the existing MergingValue which should be merged.

Methods inherited from class com.hazelcast.spi.impl.merge.AbstractSplitBrainMergePolicy

getFactoryId, readData, writeData

Methods inherited from class java.lang.Object

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

Constructor Detail

LatestUpdateMergePolicy

public LatestUpdateMergePolicy()

Method Detail

merge

public V merge(T mergingValue,
               T existingValue)

Description copied from interface: SplitBrainMergePolicy

Selects the value of either the merging or the existing MergingValue which should be merged.

Note that the existing MergingValue instance may be null if no matching data could be found to the merging MergingValue.

Parameters:

mergingValue - MergingValue instance that has the merging data of the smaller sub-cluster

existingValue - MergingValue instance that has the existing data or null if no matching data exists

Returns:

the selected value for merging

getClassId

public int getClassId()

Description copied from interface: IdentifiedDataSerializable

Returns type identifier for this class. It should be unique per DataSerializableFactory.

Returns:

type ID