io.siddhi.core.query.selector.attribute.processor.executor

Class AggregationAttributeExecutor

java.lang.Object

io.siddhi.core.query.selector.attribute.processor.executor.AbstractAggregationAttributeExecutor

io.siddhi.core.query.selector.attribute.processor.executor.AggregationAttributeExecutor

All Implemented Interfaces:

ExpressionExecutor, Snapshotable

public class AggregationAttributeExecutor
extends AbstractAggregationAttributeExecutor

Executor for attribute aggregations.

Field Summary

Fields inherited from class io.siddhi.core.query.selector.attribute.processor.executor.AbstractAggregationAttributeExecutor

attributeAggregator, attributeExpressionExecutors, siddhiQueryContext, size

Constructor Summary

Constructors

Constructor and Description
AggregationAttributeExecutor(AttributeAggregator attributeAggregator, ExpressionExecutor[] attributeExpressionExecutors, SiddhiQueryContext siddhiQueryContext)

Method Summary

Modifier and Type	Method and Description
ExpressionExecutor	cloneExecutor(String key)
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
Object	execute(ComplexEvent event)
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.

Methods inherited from class io.siddhi.core.query.selector.attribute.processor.executor.AbstractAggregationAttributeExecutor

clean, getElementId, getReturnType

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregationAttributeExecutor

public AggregationAttributeExecutor(AttributeAggregator attributeAggregator,
                                    ExpressionExecutor[] attributeExpressionExecutors,
                                    SiddhiQueryContext siddhiQueryContext)

Method Detail

execute

public Object execute(ComplexEvent event)

cloneExecutor

public ExpressionExecutor cloneExecutor(String key)

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

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.

Parameters:

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