com.hazelcast.cache.impl.operation

Class CacheMergeOperation

java.lang.Object

com.hazelcast.spi.Operation

com.hazelcast.spi.impl.AbstractNamedOperation

com.hazelcast.cache.impl.operation.CacheOperation

com.hazelcast.cache.impl.operation.CacheMergeOperation

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, BackupAwareOperation, TargetAware, NamedOperation, PartitionAwareOperation, ServiceNamespaceAware

public class CacheMergeOperation
extends CacheOperation
implements BackupAwareOperation, TargetAware

Contains multiple merging entries for split-brain healing with a SplitBrainMergePolicy.

Since:

3.10

Field Summary

Fields inherited from class com.hazelcast.cache.impl.operation.CacheOperation

cacheService, dontCreateCacheRecordStoreIfNotExist, recordStore, tenantContext, wanEventPublisher

Fields inherited from class com.hazelcast.spi.impl.AbstractNamedOperation

name

Fields inherited from class com.hazelcast.spi.Operation

GENERIC_PARTITION_ID

Constructor Summary

Constructors

Constructor and Description
CacheMergeOperation()
CacheMergeOperation(String name, List<SplitBrainMergeTypes.CacheMergeTypes> mergingEntries, SplitBrainMergePolicy<Data,SplitBrainMergeTypes.CacheMergeTypes> mergePolicy)

Method Summary

Modifier and Type	Method and Description
protected void	beforeRunInternal() Implementers can override this method to make a specific execution.
Operation	getBackupOperation() Creates the BackupOperation responsible for making the backup.
int	getId() Returns type identifier for this class.
Object	getResponse() Called if and only if Operation.returnsResponse() returned true, shortly after Operation.run() returns.
protected void	readInternal(ObjectDataInput in)
protected boolean	requiresExplicitServiceName() Returns true to force the explicit service name serialization for this operation, false otherwise.
void	run() Runs the operation.
void	setTarget(Address address) Provides the designated target member address to which the operation will be sent.
boolean	shouldBackup() Checks if a backup needs to be made.
protected void	writeInternal(ObjectDataOutput out)

Methods inherited from class com.hazelcast.cache.impl.operation.CacheOperation

afterRun, beforeRun, dispose, getAsyncBackupCount, getFactoryId, getServiceName, getServiceNamespace, getSyncBackupCount, logError, onInvocationException, publishWanRemove, publishWanUpdate, publishWanUpdate, publishWanUpdate

Methods inherited from class com.hazelcast.spi.impl.AbstractNamedOperation

getName, toString

Methods inherited from class com.hazelcast.spi.Operation

call, executedLocally, getCallerAddress, getCallerUuid, getCallId, getCallTimeout, getConnection, getInvocationTime, getLogger, getNodeEngine, getOperationResponseHandler, getPartitionId, getReplicaIndex, getService, getWaitTimeout, isUrgent, onExecutionFailure, onSetCallId, readData, 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.BackupAwareOperation

getAsyncBackupCount, getSyncBackupCount

Methods inherited from interface com.hazelcast.spi.PartitionAwareOperation

getPartitionId

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

readData, writeData

Constructor Detail

CacheMergeOperation

public CacheMergeOperation()

CacheMergeOperation

public CacheMergeOperation(String name,
                           List<SplitBrainMergeTypes.CacheMergeTypes> mergingEntries,
                           SplitBrainMergePolicy<Data,SplitBrainMergeTypes.CacheMergeTypes> mergePolicy)

Method Detail

beforeRunInternal

protected void beforeRunInternal()

Description copied from class: CacheOperation

Implementers can override this method to make a specific execution.

Overrides:

beforeRunInternal in class CacheOperation

run

public void run()

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

See Also:

Operation.call()

getResponse

public Object getResponse()

Description copied from class: Operation

Called if and only if Operation.returnsResponse() returned true, shortly after Operation.run() returns.

Overrides:

getResponse in class Operation

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

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.

Specified by:

getBackupOperation in interface BackupAwareOperation

Returns:

the created BackupOperation responsible for making the backup.

setTarget

public void setTarget(Address address)

Description copied from interface: TargetAware

Provides the designated target member address to which the operation will be sent.

• This method is invoked on the implementing object before the operation is serialized and sent over the network
• When an operation is retried, the target may be re-evaluated (eg a partition operation may target a different member after a topology change). setTarget will be invoked on each retry with the current target member's Address as argument
• When an operation is executed on the local member, the local member's address is provided as target address

Specified by:

setTarget in interface TargetAware

Parameters:

address - target member's address

requiresExplicitServiceName

protected boolean requiresExplicitServiceName()

Description copied from class: Operation

Returns true to force the explicit service name serialization for this operation, false otherwise.

Usually, the method should be overridden if Operation.getServiceName() is also overridden, but it was not overridden in the previous HZ version, i.e. the service name was provided using an explicit external call to Operation.setServiceName(java.lang.String). This mechanism is required to maintain the backward compatibility of the serialized representation of the operation since the service name is not serialized if it matches the one returned by Operation.getServiceName().

Overrides:

requiresExplicitServiceName in class Operation

writeInternal

protected void writeInternal(ObjectDataOutput out)
                      throws IOException

Overrides:

writeInternal in class AbstractNamedOperation

Throws:

IOException

readInternal

protected void readInternal(ObjectDataInput in)
                     throws IOException

Overrides:

readInternal in class AbstractNamedOperation

Throws:

IOException

getId

public int getId()

Description copied from interface: IdentifiedDataSerializable

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

Specified by:

getId in interface IdentifiedDataSerializable

Returns:

type ID