com.espertech.esper.epl.core

Class ResultSetProcessorRowPerGroup

java.lang.Object

com.espertech.esper.epl.core.ResultSetProcessorRowPerGroup

All Implemented Interfaces:

AggregationRowRemovedCallback, ResultSetProcessor, StopCallback

Direct Known Subclasses:

ResultSetProcessorRowPerGroupUnbound

public class ResultSetProcessorRowPerGroup
extends Object
implements ResultSetProcessor, AggregationRowRemovedCallback

Result set processor for the fully-grouped case: there is a group-by and all non-aggregation event properties in the select clause are listed in the group by, and there are aggregation functions.

Produces one row for each group that changed (and not one row per event). Computes MultiKey group-by keys for each event and uses a set of the group-by keys to generate the result rows, using the first (old or new, anyone) event for each distinct group-by key.

Field Summary

Fields

Modifier and Type	Field and Description
protected AgentInstanceContext	agentInstanceContext
protected AggregationService	aggregationService
protected OrderByProcessor	orderByProcessor
protected ResultSetProcessorGroupedOutputAllGroupReps	outputAllGroupReps
protected ResultSetProcessorRowPerGroupFactory	prototype
protected SelectExprProcessor	selectExprProcessor

Constructor Summary

Constructors

Constructor and Description
ResultSetProcessorRowPerGroup(ResultSetProcessorRowPerGroupFactory prototype, SelectExprProcessor selectExprProcessor, OrderByProcessor orderByProcessor, AggregationService aggregationService, AgentInstanceContext agentInstanceContext)

Method Summary

Modifier and Type	Method and Description
void	acceptHelperVisitor(ResultSetProcessorOutputHelperVisitor visitor)
void	applyJoinResult(Set<MultiKey<EventBean>> newEvents, Set<MultiKey<EventBean>> oldEvents)
void	applyViewResult(EventBean[] newData, EventBean[] oldData)
void	clear() Clear out current state.
UniformPair<EventBean[]>	continueOutputLimitedLastAllNonBufferedJoin(boolean isSynthesize, boolean isAll)
UniformPair<EventBean[]>	continueOutputLimitedLastAllNonBufferedView(boolean isSynthesize, boolean isAll)
Object	generateGroupKey(EventBean[] eventsPerStream, boolean isNewData)
protected Object[]	generateGroupKeys(EventBean[] events, Map<Object,EventBean> eventPerKey, boolean isNewData)
void	generateOutputBatchedArr(boolean join, Iterator<Map.Entry<Object,EventBean[]>> keysAndEvents, boolean isNewData, boolean isSynthesize, List<EventBean> resultEvents, List<Object> optSortKeys)
EventBean	generateOutputBatchedNoSortWMap(boolean join, Object mk, EventBean[] eventsPerStream, boolean isNewData, boolean isSynthesize)
protected EventBean[]	generateOutputEventsView(Map<Object,EventBean> keysAndEvents, boolean isNewData, boolean isSynthesize)
AggregationService	getAggregationService()
Iterator<EventBean>	getIterator(Set<MultiKey<EventBean>> joinSet) Returns the iterator for iterating over a join-result.
Iterator<EventBean>	getIterator(Viewable parent) Returns the iterator implementing the group-by and aggregation and order-by logic specific to each case of use of these construct.
protected Iterator<EventBean>	getIteratorSorted(Iterator<EventBean> parentIter)
ExprEvaluator	getOptionalHavingNode() Returns the optional having expression.
EventType	getResultEventType() Returns the event type of processed results.
SelectExprProcessor	getSelectExprProcessor() Returns the select expression processor
boolean	hasAggregation()
Iterator<EventBean>	obtainIterator(Viewable parent)
UniformPair<EventBean[]>	processJoinResult(Set<MultiKey<EventBean>> newEvents, Set<MultiKey<EventBean>> oldEvents, boolean isSynthesize) For use by joins posting their result, process the event rows that are entered and removed (new and old events).
UniformPair<EventBean[]>	processOutputLimitedJoin(List<UniformPair<Set<MultiKey<EventBean>>>> joinEventsSet, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType) Processes batched events in case of output-rate limiting.
void	processOutputLimitedLastAllNonBufferedJoin(Set<MultiKey<EventBean>> newData, Set<MultiKey<EventBean>> oldData, boolean isGenerateSynthetic, boolean isAll)
void	processOutputLimitedLastAllNonBufferedView(EventBean[] newData, EventBean[] oldData, boolean isGenerateSynthetic, boolean isAll)
UniformPair<EventBean[]>	processOutputLimitedView(List<UniformPair<EventBean[]>> viewEventsList, boolean generateSynthetic, OutputLimitLimitType outputLimitLimitType) Processes batched events in case of output-rate limiting.
UniformPair<EventBean[]>	processViewResult(EventBean[] newData, EventBean[] oldData, boolean isSynthesize) For use by views posting their result, process the event rows that are entered and removed (new and old events).
void	removed(Object key)
void	setAgentInstanceContext(AgentInstanceContext agentInstanceContext)
void	stop() Stops the underlying resources.

Methods inherited from class java.lang.Object

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

Field Detail

prototype

protected final ResultSetProcessorRowPerGroupFactory prototype

selectExprProcessor

protected final SelectExprProcessor selectExprProcessor

orderByProcessor

protected final OrderByProcessor orderByProcessor

aggregationService

protected final AggregationService aggregationService

agentInstanceContext

protected AgentInstanceContext agentInstanceContext

outputAllGroupReps

protected ResultSetProcessorGroupedOutputAllGroupReps outputAllGroupReps

Constructor Detail

ResultSetProcessorRowPerGroup

public ResultSetProcessorRowPerGroup(ResultSetProcessorRowPerGroupFactory prototype,
                                     SelectExprProcessor selectExprProcessor,
                                     OrderByProcessor orderByProcessor,
                                     AggregationService aggregationService,
                                     AgentInstanceContext agentInstanceContext)

Method Detail

setAgentInstanceContext

public void setAgentInstanceContext(AgentInstanceContext agentInstanceContext)

Specified by:

setAgentInstanceContext in interface ResultSetProcessor

getResultEventType

public EventType getResultEventType()

Description copied from interface: ResultSetProcessor

Returns the event type of processed results.

Specified by:

getResultEventType in interface ResultSetProcessor

Returns:

event type of the resulting events posted by the processor.

applyViewResult

public void applyViewResult(EventBean[] newData,
                            EventBean[] oldData)

Specified by:

applyViewResult in interface ResultSetProcessor

applyJoinResult

public void applyJoinResult(Set<MultiKey<EventBean>> newEvents,
                            Set<MultiKey<EventBean>> oldEvents)

Specified by:

applyJoinResult in interface ResultSetProcessor

processJoinResult

public UniformPair<EventBean[]> processJoinResult(Set<MultiKey<EventBean>> newEvents,
                                                  Set<MultiKey<EventBean>> oldEvents,
                                                  boolean isSynthesize)

Description copied from interface: ResultSetProcessor

For use by joins posting their result, process the event rows that are entered and removed (new and old events). Processes according to select-clauses, group-by clauses and having-clauses and returns new events and old events as specified.

Specified by:

processJoinResult in interface ResultSetProcessor

Parameters:

newEvents - - new events posted by join

oldEvents - - old events posted by join

isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set

Returns:

pair of new events and old events

processViewResult

public UniformPair<EventBean[]> processViewResult(EventBean[] newData,
                                                  EventBean[] oldData,
                                                  boolean isSynthesize)

Description copied from interface: ResultSetProcessor

For use by views posting their result, process the event rows that are entered and removed (new and old events). Processes according to select-clauses, group-by clauses and having-clauses and returns new events and old events as specified.

Specified by:

processViewResult in interface ResultSetProcessor

Parameters:

newData - - new events posted by view

oldData - - old events posted by view

isSynthesize - - set to true to indicate that synthetic events are required for an iterator result set

Returns:

pair of new events and old events

generateOutputEventsView

protected EventBean[] generateOutputEventsView(Map<Object,EventBean> keysAndEvents,
                                               boolean isNewData,
                                               boolean isSynthesize)

generateOutputBatchedArr

public void generateOutputBatchedArr(boolean join,
                                     Iterator<Map.Entry<Object,EventBean[]>> keysAndEvents,
                                     boolean isNewData,
                                     boolean isSynthesize,
                                     List<EventBean> resultEvents,
                                     List<Object> optSortKeys)

generateOutputBatchedNoSortWMap

public EventBean generateOutputBatchedNoSortWMap(boolean join,
                                                 Object mk,
                                                 EventBean[] eventsPerStream,
                                                 boolean isNewData,
                                                 boolean isSynthesize)

generateGroupKeys

protected Object[] generateGroupKeys(EventBean[] events,
                                     Map<Object,EventBean> eventPerKey,
                                     boolean isNewData)

getOptionalHavingNode

public ExprEvaluator getOptionalHavingNode()

Returns the optional having expression.

Returns:

having expression node

getSelectExprProcessor

public SelectExprProcessor getSelectExprProcessor()

Returns the select expression processor

Returns:

select processor.

getIterator

public Iterator<EventBean> getIterator(Viewable parent)

Description copied from interface: ResultSetProcessor

Returns the iterator implementing the group-by and aggregation and order-by logic specific to each case of use of these construct.

Specified by:

getIterator in interface ResultSetProcessor

Parameters:

parent - is the parent view iterator

Returns:

event iterator

obtainIterator

public Iterator<EventBean> obtainIterator(Viewable parent)

getIteratorSorted

protected Iterator<EventBean> getIteratorSorted(Iterator<EventBean> parentIter)

getIterator

public Iterator<EventBean> getIterator(Set<MultiKey<EventBean>> joinSet)

Description copied from interface: ResultSetProcessor

Returns the iterator for iterating over a join-result.

Specified by:

getIterator in interface ResultSetProcessor

Parameters:

joinSet - is the join result set

Returns:

iterator over join results

clear

public void clear()

Description copied from interface: ResultSetProcessor

Clear out current state.

Specified by:

clear in interface ResultSetProcessor

processOutputLimitedJoin

public UniformPair<EventBean[]> processOutputLimitedJoin(List<UniformPair<Set<MultiKey<EventBean>>>> joinEventsSet,
                                                         boolean generateSynthetic,
                                                         OutputLimitLimitType outputLimitLimitType)

Description copied from interface: ResultSetProcessor

Processes batched events in case of output-rate limiting.

Specified by:

processOutputLimitedJoin in interface ResultSetProcessor

Parameters:

joinEventsSet - the join results

generateSynthetic - flag to indicate whether synthetic events must be generated

outputLimitLimitType - the type of output rate limiting

Returns:

results for dispatch

processOutputLimitedView

public UniformPair<EventBean[]> processOutputLimitedView(List<UniformPair<EventBean[]>> viewEventsList,
                                                         boolean generateSynthetic,
                                                         OutputLimitLimitType outputLimitLimitType)

Description copied from interface: ResultSetProcessor

Processes batched events in case of output-rate limiting.

Specified by:

processOutputLimitedView in interface ResultSetProcessor

Parameters:

viewEventsList - the view results

generateSynthetic - flag to indicate whether synthetic events must be generated

outputLimitLimitType - the type of output rate limiting

Returns:

results for dispatch

hasAggregation

public boolean hasAggregation()

Specified by:

hasAggregation in interface ResultSetProcessor

removed

public void removed(Object key)

Specified by:

removed in interface AggregationRowRemovedCallback

generateGroupKey

public Object generateGroupKey(EventBean[] eventsPerStream,
                               boolean isNewData)

processOutputLimitedLastAllNonBufferedView

public void processOutputLimitedLastAllNonBufferedView(EventBean[] newData,
                                                       EventBean[] oldData,
                                                       boolean isGenerateSynthetic,
                                                       boolean isAll)

Specified by:

processOutputLimitedLastAllNonBufferedView in interface ResultSetProcessor

processOutputLimitedLastAllNonBufferedJoin

public void processOutputLimitedLastAllNonBufferedJoin(Set<MultiKey<EventBean>> newData,
                                                       Set<MultiKey<EventBean>> oldData,
                                                       boolean isGenerateSynthetic,
                                                       boolean isAll)

Specified by:

processOutputLimitedLastAllNonBufferedJoin in interface ResultSetProcessor

continueOutputLimitedLastAllNonBufferedView

public UniformPair<EventBean[]> continueOutputLimitedLastAllNonBufferedView(boolean isSynthesize,
                                                                            boolean isAll)

Specified by:

continueOutputLimitedLastAllNonBufferedView in interface ResultSetProcessor

continueOutputLimitedLastAllNonBufferedJoin

public UniformPair<EventBean[]> continueOutputLimitedLastAllNonBufferedJoin(boolean isSynthesize,
                                                                            boolean isAll)

Specified by:

continueOutputLimitedLastAllNonBufferedJoin in interface ResultSetProcessor

stop

public void stop()

Description copied from interface: StopCallback

Stops the underlying resources.

Specified by:

stop in interface StopCallback

getAggregationService

public AggregationService getAggregationService()

acceptHelperVisitor

public void acceptHelperVisitor(ResultSetProcessorOutputHelperVisitor visitor)

Specified by:

acceptHelperVisitor in interface ResultSetProcessor