com.hazelcast.cardinality.impl.operations

Class MergeOperation

java.lang.Object

com.hazelcast.spi.Operation

com.hazelcast.cardinality.impl.operations.AbstractCardinalityEstimatorOperation

com.hazelcast.cardinality.impl.operations.CardinalityEstimatorBackupAwareOperation

com.hazelcast.cardinality.impl.operations.MergeOperation

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, BackupAwareOperation, NamedOperation, PartitionAwareOperation

public class MergeOperation
extends CardinalityEstimatorBackupAwareOperation

Contains a mergeable HyperLogLog instance for split-brain healing with a SplitBrainMergePolicy.

Since:

3.10

Field Summary

Fields inherited from class com.hazelcast.cardinality.impl.operations.CardinalityEstimatorBackupAwareOperation

shouldBackup

Fields inherited from class com.hazelcast.cardinality.impl.operations.AbstractCardinalityEstimatorOperation

name

Fields inherited from class com.hazelcast.spi.Operation

GENERIC_PARTITION_ID

Constructor Summary

Constructors

Constructor and Description
MergeOperation()
MergeOperation(String name, SplitBrainMergePolicy<HyperLogLog,SplitBrainMergeTypes.CardinalityEstimatorMergeTypes> mergePolicy, HyperLogLog value)

Method Summary

Modifier and Type	Method and Description
Operation	getBackupOperation() Creates the BackupOperation responsible for making the backup.
int	getId() Returns type identifier for this class.
protected void	readInternal(ObjectDataInput in)
void	run() Runs the operation.
boolean	shouldBackup() Checks if a backup needs to be made.
protected void	writeInternal(ObjectDataOutput out)

Methods inherited from class com.hazelcast.cardinality.impl.operations.CardinalityEstimatorBackupAwareOperation

getAsyncBackupCount, getSyncBackupCount

Methods inherited from class com.hazelcast.cardinality.impl.operations.AbstractCardinalityEstimatorOperation

getCardinalityEstimatorContainer, getFactoryId, getName, getServiceName, toString

Methods inherited from class com.hazelcast.spi.Operation

afterRun, beforeRun, call, executedLocally, getCallerAddress, getCallerUuid, getCallId, getCallTimeout, getConnection, getInvocationTime, getLogger, getNodeEngine, getOperationResponseHandler, getPartitionId, getReplicaIndex, getResponse, getService, getWaitTimeout, isUrgent, logError, onExecutionFailure, onInvocationException, onSetCallId, readData, requiresExplicitServiceName, returnsResponse, sendResponse, setCallerUuid, setNodeEngine, setOperationResponseHandler, setPartitionId, setReplicaIndex, setService, setServiceName, setValidateTarget, setWaitTimeout, toString, validatesTarget, writeData

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.spi.PartitionAwareOperation

getPartitionId

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

readData, writeData

Constructor Detail

MergeOperation

public MergeOperation()

MergeOperation

public MergeOperation(String name,
                      SplitBrainMergePolicy<HyperLogLog,SplitBrainMergeTypes.CardinalityEstimatorMergeTypes> mergePolicy,
                      HyperLogLog value)

Method Detail

run

public void run()
         throws Exception

Description copied from class: Operation

Runs the operation. Either the Operation.run() or Operation.call() method should be implemented; not both. Runs after wait-support, supposed to do actual operation

Overrides:

run in class Operation

Throws:

Exception

See Also:

Operation.call()

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

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

Returns:

type ID

shouldBackup

public boolean shouldBackup()

Description copied from interface: BackupAwareOperation

Checks if a backup needs to be made.

If a call has not made any change, e.g. an AtomicLong increment with 0, no backup needs to be made.

Specified by:

shouldBackup in interface BackupAwareOperation

Overrides:

shouldBackup in class CardinalityEstimatorBackupAwareOperation

Returns:

true if a backup needs to be made, false otherwise.

getBackupOperation

public Operation getBackupOperation()

Description copied from interface: BackupAwareOperation

Creates the BackupOperation responsible for making the backup.

Returns:

the created BackupOperation responsible for making the backup.

readInternal

protected void readInternal(ObjectDataInput in)
                     throws IOException

Overrides:

readInternal in class AbstractCardinalityEstimatorOperation

Throws:

IOException

writeInternal

protected void writeInternal(ObjectDataOutput out)
                      throws IOException

Overrides:

writeInternal in class AbstractCardinalityEstimatorOperation

Throws:

IOException