com.espertech.esper.epl.agg.service

Class AggSvcGroupAllMixedAccessImpl

java.lang.Object

com.espertech.esper.epl.agg.service.AggregationServiceBaseUngrouped

com.espertech.esper.epl.agg.service.AggSvcGroupAllMixedAccessImpl

All Implemented Interfaces:

AggregationResultFuture, AggregationService, StopCallback

public class AggSvcGroupAllMixedAccessImpl
extends AggregationServiceBaseUngrouped

Implementation for handling aggregation without any grouping (no group-by).

Field Summary

Fields

Modifier and Type	Field and Description
protected AggregationState[]	states

Fields inherited from class com.espertech.esper.epl.agg.service.AggregationServiceBaseUngrouped

accessAggregations, aggregatorFactories, aggregators, evaluators

Constructor Summary

Constructors

Constructor and Description
AggSvcGroupAllMixedAccessImpl(ExprEvaluator[] evaluators, AggregationMethod[] aggregators, AggregationAccessorSlotPair[] accessors, AggregationState[] states, AggregationMethodFactory[] aggregatorFactories, AggregationStateFactory[] accessAggregations)

Method Summary

Modifier and Type	Method and Description
void	accept(AggregationServiceVisitor visitor)
void	acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor)
void	applyEnter(EventBean[] eventsPerStream, Object optionalGroupKeyPerRow, ExprEvaluatorContext exprEvaluatorContext) Apply events as entering a window (new events).
void	applyLeave(EventBean[] eventsPerStream, Object optionalGroupKeyPerRow, ExprEvaluatorContext exprEvaluatorContext) Apply events as leaving a window (old events).
void	clearResults(ExprEvaluatorContext exprEvaluatorContext) Clear current aggregation state.
Collection<EventBean>	getCollectionOfEvents(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
Collection<Object>	getCollectionScalar(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
EventBean	getEventBean(int column, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)
Object	getGroupKey(int agentInstanceId)
Collection<Object>	getGroupKeys(ExprEvaluatorContext exprEvaluatorContext)
Object	getValue(int column, int agentInstanceId, EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext exprEvaluatorContext) Returns current aggregation state, for use by expression node representing an aggregation function.
boolean	isGrouped()
void	setCurrentAccess(Object groupKey, int agentInstanceId, AggregationGroupByRollupLevel rollupLevel) Set the current aggregation state row - for use when evaluation nodes are asked to evaluate.
void	setRemovedCallback(AggregationRowRemovedCallback callback)

Methods inherited from class com.espertech.esper.epl.agg.service.AggregationServiceBaseUngrouped

getContextPartitionAggregationService, stop

Methods inherited from class java.lang.Object

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

Field Detail

states

protected AggregationState[] states

Constructor Detail

AggSvcGroupAllMixedAccessImpl

public AggSvcGroupAllMixedAccessImpl(ExprEvaluator[] evaluators,
                                     AggregationMethod[] aggregators,
                                     AggregationAccessorSlotPair[] accessors,
                                     AggregationState[] states,
                                     AggregationMethodFactory[] aggregatorFactories,
                                     AggregationStateFactory[] accessAggregations)

Method Detail

applyEnter

public void applyEnter(EventBean[] eventsPerStream,
                       Object optionalGroupKeyPerRow,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Apply events as entering a window (new events).

Parameters:

eventsPerStream - - events for each stream entering window

optionalGroupKeyPerRow - - can be null if grouping without keys is desired, else the keys or array of keys to use for grouping, each distinct key value results in a new row of aggregation state.

exprEvaluatorContext - context for expression evaluatiom

applyLeave

public void applyLeave(EventBean[] eventsPerStream,
                       Object optionalGroupKeyPerRow,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Apply events as leaving a window (old events).

Parameters:

eventsPerStream - - events for each stream entering window

optionalGroupKeyPerRow - - can be null if grouping without keys is desired, else the keys or array of keys to use for grouping, each distinct key value results in a new row of aggregation state.

exprEvaluatorContext - context for expression evaluatiom

setCurrentAccess

public void setCurrentAccess(Object groupKey,
                             int agentInstanceId,
                             AggregationGroupByRollupLevel rollupLevel)

Description copied from interface: AggregationService

Set the current aggregation state row - for use when evaluation nodes are asked to evaluate.

Parameters:

groupKey - - single key identifying the row of aggregation states

agentInstanceId - context partition id

rollupLevel - rollup level

getValue

public Object getValue(int column,
                       int agentInstanceId,
                       EventBean[] eventsPerStream,
                       boolean isNewData,
                       ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationResultFuture

Returns current aggregation state, for use by expression node representing an aggregation function.

Parameters:

column - is assigned to the aggregation expression node and passed as an column (index) into a row

agentInstanceId - the context partition id

eventsPerStream - events per stream

isNewData - new vs removed indicator

exprEvaluatorContext - context

Returns:

current aggragation state

getCollectionOfEvents

public Collection<EventBean> getCollectionOfEvents(int column,
                                                   EventBean[] eventsPerStream,
                                                   boolean isNewData,
                                                   ExprEvaluatorContext context)

getCollectionScalar

public Collection<Object> getCollectionScalar(int column,
                                              EventBean[] eventsPerStream,
                                              boolean isNewData,
                                              ExprEvaluatorContext context)

getEventBean

public EventBean getEventBean(int column,
                              EventBean[] eventsPerStream,
                              boolean isNewData,
                              ExprEvaluatorContext context)

clearResults

public void clearResults(ExprEvaluatorContext exprEvaluatorContext)

Description copied from interface: AggregationService

Clear current aggregation state.

Parameters:

exprEvaluatorContext - context

setRemovedCallback

public void setRemovedCallback(AggregationRowRemovedCallback callback)

accept

public void accept(AggregationServiceVisitor visitor)

acceptGroupDetail

public void acceptGroupDetail(AggregationServiceVisitorWGroupDetail visitor)

isGrouped

public boolean isGrouped()

getGroupKey

public Object getGroupKey(int agentInstanceId)

getGroupKeys

public Collection<Object> getGroupKeys(ExprEvaluatorContext exprEvaluatorContext)