org.wso2.siddhi.core.aggregation

Class IncrementalExecutor

java.lang.Object

org.wso2.siddhi.core.aggregation.IncrementalExecutor

All Implemented Interfaces:

Executor, Snapshotable

public class IncrementalExecutor
extends Object
implements Executor, Snapshotable

Incremental executor class which is responsible for performing incremental aggregation.

Constructor Summary

Constructors

Constructor and Description
IncrementalExecutor(org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration duration, List<ExpressionExecutor> processExpressionExecutors, GroupByKeyGenerator groupByKeyGenerator, MetaStreamEvent metaStreamEvent, IncrementalExecutor child, boolean isRoot, Table table, SiddhiAppContext siddhiAppContext, String aggregatorName, ExpressionExecutor shouldUpdateExpressionExecutor)

Method Summary

Modifier and Type	Method and Description
void	clearExecutor()
Map<String,Object>	currentState() Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time
void	execute(ComplexEventChunk streamEventChunk) Execute the handed StreamEvent
long	getAggregationStartTimestamp()
String	getElementId()
long	getNextEmitTime()
Executor	getNextExecutor() Get next executor element in the execution chain.
boolean	isProcessingExecutor()
void	restoreState(Map<String,Object> state) Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.
void	setNextExecutor(Executor nextExecutor) Set next executor element in execution chain
void	setProcessingExecutor(boolean processingExecutor)
void	setScheduler(Scheduler scheduler)
void	setValuesForInMemoryRecreateFromTable(long emitTimeOfLatestEventInTable)

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalExecutor

public IncrementalExecutor(org.wso2.siddhi.query.api.aggregation.TimePeriod.Duration duration,
                           List<ExpressionExecutor> processExpressionExecutors,
                           GroupByKeyGenerator groupByKeyGenerator,
                           MetaStreamEvent metaStreamEvent,
                           IncrementalExecutor child,
                           boolean isRoot,
                           Table table,
                           SiddhiAppContext siddhiAppContext,
                           String aggregatorName,
                           ExpressionExecutor shouldUpdateExpressionExecutor)

Method Detail

setScheduler

public void setScheduler(Scheduler scheduler)

execute

public void execute(ComplexEventChunk streamEventChunk)

Description copied from interface: Executor

Execute the handed StreamEvent

Specified by:

execute in interface Executor

Parameters:

streamEventChunk - event chunk to be processed

getNextExecutor

public Executor getNextExecutor()

Description copied from interface: Executor

Get next executor element in the execution chain. Executed event should be sent to next executor

Specified by:

getNextExecutor in interface Executor

Returns:

next executor

setNextExecutor

public void setNextExecutor(Executor nextExecutor)

Description copied from interface: Executor

Set next executor element in execution chain

Specified by:

setNextExecutor in interface Executor

Parameters:

nextExecutor - Event executor for incremental execution

getAggregationStartTimestamp

public long getAggregationStartTimestamp()

getNextEmitTime

public long getNextEmitTime()

setValuesForInMemoryRecreateFromTable

public void setValuesForInMemoryRecreateFromTable(long emitTimeOfLatestEventInTable)

isProcessingExecutor

public boolean isProcessingExecutor()

setProcessingExecutor

public void setProcessingExecutor(boolean processingExecutor)

clearExecutor

public void clearExecutor()

currentState

public Map<String,Object> currentState()

Description copied from interface: Snapshotable

Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time

Specified by:

currentState in interface Snapshotable

Returns:

stateful objects of the processing element as an array

restoreState

public void restoreState(Map<String,Object> state)

Description copied from interface: Snapshotable

Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Specified by:

restoreState in interface Snapshotable

Parameters:

state - the stateful objects of the element as an array on the same order provided by currentState().

getElementId

public String getElementId()

Specified by:

getElementId in interface Snapshotable