com.hazelcast.crdt.pncounter.operations

Class AddOperation

java.lang.Object

com.hazelcast.spi.Operation

com.hazelcast.crdt.pncounter.operations.AbstractPNCounterOperation

com.hazelcast.crdt.pncounter.operations.AddOperation

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, MutatingOperation, NamedOperation

public class AddOperation
extends AbstractPNCounterOperation
implements MutatingOperation

Addition/subtraction operation for a PNCounter. The session consistency guarantees are provided by sending a last-observed vector clock with each operation. The operation response will contain the current replica vector clock.

Field Summary

Fields inherited from class com.hazelcast.crdt.pncounter.operations.AbstractPNCounterOperation

name

Fields inherited from class com.hazelcast.spi.Operation

GENERIC_PARTITION_ID

Constructor Summary

Constructors

Constructor and Description
AddOperation()
AddOperation(String name, long delta, boolean getBeforeUpdate, VectorClock observedClock) Creates the addition operation.

Method Summary

Modifier and Type	Method and Description
int	getId() Returns type identifier for this class.
CRDTTimestampedLong	getResponse() Called if and only if Operation.returnsResponse() returned true, shortly after Operation.run() returns.
protected void	readInternal(ObjectDataInput in)
void	run() Runs the operation.
protected void	writeInternal(ObjectDataOutput out)

Methods inherited from class com.hazelcast.crdt.pncounter.operations.AbstractPNCounterOperation

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, 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.nio.serialization.DataSerializable

readData, writeData

Constructor Detail

AddOperation

public AddOperation(String name,
                    long delta,
                    boolean getBeforeUpdate,
                    VectorClock observedClock)

Creates the addition operation.

Parameters:

name - the name of the PNCounter

delta - the delta to add to the counter value, can be negative

getBeforeUpdate - true if the operation should return the counter value before the addition, false if it should return the value after the addition

observedClock - previously observed vector clock, may be null

AddOperation

public AddOperation()

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()

getResponse

public CRDTTimestampedLong 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

writeInternal

protected void writeInternal(ObjectDataOutput out)
                      throws IOException

Overrides:

writeInternal in class AbstractPNCounterOperation

Throws:

IOException

readInternal

protected void readInternal(ObjectDataInput in)
                     throws IOException

Overrides:

readInternal in class AbstractPNCounterOperation

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