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

Method Summary

Modifier and Type	Method and Description
void	clean() Used to clean its references
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()
Executor	getNextExecutor() Get next executor element in the execution chain.
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	setEmitTimestamp(long emitTimeOfLatestEventInTable)
void	setNextExecutor(Executor nextExecutor) Set next executor element in execution chain
void	setProcessingExecutor(boolean processingExecutor)
void	setScheduler(Scheduler scheduler)

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalExecutor

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

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()

setEmitTimestamp

public void setEmitTimestamp(long emitTimeOfLatestEventInTable)

setProcessingExecutor

public void setProcessingExecutor(boolean processingExecutor)

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

clean

public void clean()

Description copied from interface: Snapshotable

Used to clean its references

Specified by:

clean in interface Snapshotable