io.siddhi.core.query.processor.stream.window

Class GroupingWindowProcessor<S extends State>

java.lang.Object

io.siddhi.core.query.processor.stream.AbstractStreamProcessor<S>

io.siddhi.core.query.processor.stream.window.WindowProcessor<S>

io.siddhi.core.query.processor.stream.window.GroupingWindowProcessor<S>

Type Parameters:

S - current state of the processor

All Implemented Interfaces:

Processor, ExternalReferencedHolder

Direct Known Subclasses:

GroupingFindableWindowProcessor

public abstract class GroupingWindowProcessor<S extends State>
extends WindowProcessor<S>

Performs event processing with key based event groups

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	GroupingWindowProcessor.GroupingKeyPopulator Populates grouping key to the complex event

Field Summary

Fields

Modifier and Type	Field and Description
protected GroupingWindowProcessor.GroupingKeyPopulator	groupingKeyPopulator
protected List<io.siddhi.query.api.definition.Attribute>	internalAttributes

Fields inherited from class io.siddhi.core.query.processor.stream.AbstractStreamProcessor

attributeExpressionExecutors, attributeExpressionLength, complexEventPopulater, inputDefinition, metaStreamEvent, nextProcessor, siddhiQueryContext, stateHolder, streamEventClonerHolder

Constructor Summary

Constructors

Constructor and Description
GroupingWindowProcessor()

Method Summary

Modifier and Type	Method and Description
void	constructStreamEventPopulater(MetaStreamEvent metaStreamEvent, int streamEventChainIndex)
ProcessingMode	getProcessingMode() Defines the behaviour of the processing, will be called after the init
protected abstract StateFactory<S>	init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, boolean outputExpectsExpiredEvents, SiddhiQueryContext siddhiQueryContext) The init method of the WindowProcessor, this method will be called before other methods
protected StateFactory<S>	init(MetaStreamEvent metaStreamEvent, io.siddhi.query.api.definition.AbstractDefinition inputDefinition, ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, StreamEventClonerHolder streamEventClonerHolder, boolean outputExpectsExpiredEvents, boolean findToBeExecuted, SiddhiQueryContext siddhiQueryContext) The init method of the StreamProcessor, this method will be called before other methods
protected void	processEventChunk(ComplexEventChunk<StreamEvent> streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, ComplexEventPopulater complexEventPopulater, S state) The main processing method that will be called upon event arrival
protected abstract void	processEventChunk(ComplexEventChunk<StreamEvent> streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, GroupingWindowProcessor.GroupingKeyPopulator groupingKeyPopulater, S state) The main processing method that will be called upon event arrival

Methods inherited from class io.siddhi.core.query.processor.stream.window.WindowProcessor

getReturnAttributes

Methods inherited from class io.siddhi.core.query.processor.stream.AbstractStreamProcessor

getNextProcessor, initProcessor, isStateful, process, process, setNextProcessor, setStreamEventCloner, setToLast

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.siddhi.core.util.extension.holder.ExternalReferencedHolder

start, stop

Field Detail

internalAttributes

protected List<io.siddhi.query.api.definition.Attribute> internalAttributes

groupingKeyPopulator

protected GroupingWindowProcessor.GroupingKeyPopulator groupingKeyPopulator

Constructor Detail

GroupingWindowProcessor

public GroupingWindowProcessor()

Method Detail

init

protected StateFactory<S> init(MetaStreamEvent metaStreamEvent,
                               io.siddhi.query.api.definition.AbstractDefinition inputDefinition,
                               ExpressionExecutor[] attributeExpressionExecutors,
                               ConfigReader configReader,
                               StreamEventClonerHolder streamEventClonerHolder,
                               boolean outputExpectsExpiredEvents,
                               boolean findToBeExecuted,
                               SiddhiQueryContext siddhiQueryContext)

Description copied from class: AbstractStreamProcessor

The init method of the StreamProcessor, this method will be called before other methods

Specified by:

init in class AbstractStreamProcessor<S extends State>

Parameters:

metaStreamEvent - the stream event meta

inputDefinition - the incoming stream definition

attributeExpressionExecutors - the executors of each function parameters

configReader - this hold the AbstractStreamProcessor extensions configuration

streamEventClonerHolder - stream event cloner holder

outputExpectsExpiredEvents - is expired events sent as output

findToBeExecuted - find will be executed

siddhiQueryContext - current siddhi query context

init

protected abstract StateFactory<S> init(ExpressionExecutor[] attributeExpressionExecutors,
                                        ConfigReader configReader,
                                        boolean outputExpectsExpiredEvents,
                                        SiddhiQueryContext siddhiQueryContext)

The init method of the WindowProcessor, this method will be called before other methods

Parameters:

attributeExpressionExecutors - the executors of each function parameters

configReader - the config reader of window

outputExpectsExpiredEvents - is expired events sent as output

siddhiQueryContext - the context of the siddhi query

processEventChunk

protected void processEventChunk(ComplexEventChunk<StreamEvent> streamEventChunk,
                                 Processor nextProcessor,
                                 StreamEventCloner streamEventCloner,
                                 ComplexEventPopulater complexEventPopulater,
                                 S state)

Description copied from class: AbstractStreamProcessor

The main processing method that will be called upon event arrival

Specified by:

processEventChunk in class AbstractStreamProcessor<S extends State>

Parameters:

streamEventChunk - the event chunk that need to be processed

nextProcessor - the next processor to which the success events need to be passed

streamEventCloner - helps to clone the incoming event for local storage or modification

complexEventPopulater - helps to populate the events with the resultant attributes

state - current state of the processor

processEventChunk

protected abstract void processEventChunk(ComplexEventChunk<StreamEvent> streamEventChunk,
                                          Processor nextProcessor,
                                          StreamEventCloner streamEventCloner,
                                          GroupingWindowProcessor.GroupingKeyPopulator groupingKeyPopulater,
                                          S state)

The main processing method that will be called upon event arrival

Parameters:

streamEventChunk - the event chunk that need to be processed

nextProcessor - the next processor to which the success events need to be passed

streamEventCloner - helps to clone the incoming event for local storage or modification

groupingKeyPopulater - helps to populate the events with the grouping key

state - current state of the processor

constructStreamEventPopulater

public void constructStreamEventPopulater(MetaStreamEvent metaStreamEvent,
                                          int streamEventChainIndex)

Overrides:

constructStreamEventPopulater in class AbstractStreamProcessor<S extends State>

getProcessingMode

public ProcessingMode getProcessingMode()

Description copied from class: AbstractStreamProcessor

Defines the behaviour of the processing, will be called after the init

Specified by:

getProcessingMode in class AbstractStreamProcessor<S extends State>

Returns:

ProcessingMode processing mode of the processor