com.hazelcast.spi.merge

Class AbstractSplitBrainMergePolicy

java.lang.Object

com.hazelcast.spi.merge.AbstractSplitBrainMergePolicy

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, SplitBrainMergePolicy

Direct Known Subclasses:

DiscardMergePolicy, HigherHitsMergePolicy, HyperLogLogMergePolicy, LatestAccessMergePolicy, LatestUpdateMergePolicy, PassThroughMergePolicy, PutIfAbsentMergePolicy

public abstract class AbstractSplitBrainMergePolicy
extends Object
implements SplitBrainMergePolicy, IdentifiedDataSerializable

Abstract implementation of SplitBrainMergePolicy for the out-of-the-box merge policies.

Doesn't save the injected SerializationService, since it's not needed by any out-of-the-box merge policy.

Since:

3.10

Constructor Summary

Constructors

Constructor and Description
AbstractSplitBrainMergePolicy()

Method Summary

Modifier and Type	Method and Description
protected void	checkInstanceOf(MergingValueHolder dataHolder, Class<?> clazz)
int	getFactoryId() Returns DataSerializableFactory factory ID for this class.
<V> V	merge(MergingValueHolder<V> mergingValue, MergingValueHolder<V> existingValue) Selects the value of either the merging or the existing MergingValueHolder which should be merged.
void	readData(ObjectDataInput in) Reads fields from the input stream
void	writeData(ObjectDataOutput out) Writes object fields to output stream

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.nio.serialization.IdentifiedDataSerializable

getId

Constructor Detail

AbstractSplitBrainMergePolicy

public AbstractSplitBrainMergePolicy()

Method Detail

checkInstanceOf

protected void checkInstanceOf(MergingValueHolder dataHolder,
                               Class<?> clazz)

getFactoryId

public int getFactoryId()

Description copied from interface: IdentifiedDataSerializable

Returns DataSerializableFactory factory ID for this class.

Specified by:

getFactoryId in interface IdentifiedDataSerializable

Returns:

factory ID

writeData

public void writeData(ObjectDataOutput out)

Description copied from interface: DataSerializable

Writes object fields to output stream

Specified by:

writeData in interface DataSerializable

Parameters:

out - output

readData

public void readData(ObjectDataInput in)

Description copied from interface: DataSerializable

Reads fields from the input stream

Specified by:

readData in interface DataSerializable

Parameters:

in - input

merge

public <V> V merge(MergingValueHolder<V> mergingValue,
                   MergingValueHolder<V> existingValue)

Description copied from interface: SplitBrainMergePolicy

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

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

Specified by:

merge in interface SplitBrainMergePolicy

Type Parameters:

V - the type of the value

Parameters:

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

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

Returns:

the selected value for merging