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

Class ExternalTimeBatchWindowProcessor

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.BatchingWindowProcessor<S>

io.siddhi.core.query.processor.stream.window.BatchingFindableWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>

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

All Implemented Interfaces:

Processor, SchedulingProcessor, FindableProcessor, ExternalReferencedHolder

public class ExternalTimeBatchWindowProcessor
extends BatchingFindableWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>
implements SchedulingProcessor

Implementation of WindowProcessor which represent a Batch Window operating based on external time.

Field Summary

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
ExternalTimeBatchWindowProcessor()

Method Summary

Modifier and Type	Method and Description
CompiledCondition	compileCondition(io.siddhi.query.api.expression.Expression condition, MatchingMetaInfoHolder matchingMetaInfoHolder, List<VariableExpressionExecutor> variableExpressionExecutors, Map<String,Table> tableMap, io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state, SiddhiQueryContext siddhiQueryContext) To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.
StreamEvent	find(StateEvent matchingEvent, CompiledCondition compiledCondition, StreamEventCloner streamEventCloner, io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state) To find events from the processor event pool, that the matches the matchingEvent based on finder logic.
Scheduler	getScheduler()
protected StateFactory	init(ExpressionExecutor[] attributeExpressionExecutors, ConfigReader configReader, StreamEventClonerHolder streamEventClonerHolder, boolean outputExpectsExpiredEvents, boolean findToBeExecuted, SiddhiQueryContext siddhiQueryContext) The init method of the WindowProcessor, this method will be called before other methods
protected void	process(ComplexEventChunk<StreamEvent> streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state) Here an assumption is taken: Parameter: timestamp: The time which the window determines as current time and will act upon, the value of this parameter should be monotonically increasing.
void	setScheduler(Scheduler scheduler)
void	start() This will be called only once and this can be used to acquire required resources for the processing element.
void	stop() This will be called only once and this can be used to release the acquired resources for processing.

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

compileCondition, find

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

getProcessingMode, init, processEventChunk

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

getReturnAttributes

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

constructStreamEventPopulater, getNextProcessor, initProcessor, isStateful, 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.query.processor.Processor

getNextProcessor, process, setNextProcessor, setToLast

Constructor Detail

ExternalTimeBatchWindowProcessor

public ExternalTimeBatchWindowProcessor()

Method Detail

init

protected StateFactory init(ExpressionExecutor[] attributeExpressionExecutors,
                            ConfigReader configReader,
                            StreamEventClonerHolder streamEventClonerHolder,
                            boolean outputExpectsExpiredEvents,
                            boolean findToBeExecuted,
                            SiddhiQueryContext siddhiQueryContext)

Description copied from class: BatchingWindowProcessor

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

Specified by:

init in class BatchingWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>

Parameters:

attributeExpressionExecutors - the executors of each function parameters

configReader - the config reader of window

streamEventClonerHolder - stream event cloner holder

outputExpectsExpiredEvents - is expired events sent as output

findToBeExecuted - find operation will be performed

siddhiQueryContext - the context of the siddhi query

process

protected void process(ComplexEventChunk<StreamEvent> streamEventChunk,
                       Processor nextProcessor,
                       StreamEventCloner streamEventCloner,
                       io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state)

Here an assumption is taken: Parameter: timestamp: The time which the window determines as current time and will act upon, the value of this parameter should be monotonically increasing. from https://docs.wso2.com/display/CEP400/Inbuilt+Windows#InbuiltWindows-externalTime

Specified by:

process in class BatchingWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>

Parameters:

streamEventChunk - the stream 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

state - current state of the processor

start

public void start()

Description copied from interface: ExternalReferencedHolder

This will be called only once and this can be used to acquire required resources for the processing element. This will be called after initializing the system and before starting to process the events.

Specified by:

start in interface ExternalReferencedHolder

stop

public void stop()

Description copied from interface: ExternalReferencedHolder

This will be called only once and this can be used to release the acquired resources for processing. This will be called before shutting down the system.

Specified by:

stop in interface ExternalReferencedHolder

compileCondition

public CompiledCondition compileCondition(io.siddhi.query.api.expression.Expression condition,
                                          MatchingMetaInfoHolder matchingMetaInfoHolder,
                                          List<VariableExpressionExecutor> variableExpressionExecutors,
                                          Map<String,Table> tableMap,
                                          io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state,
                                          SiddhiQueryContext siddhiQueryContext)

Description copied from class: BatchingFindableWindowProcessor

To construct a finder having the capability of finding events at the processor that corresponds to the incoming matchingEvent and the given matching expression logic.

Specified by:

compileCondition in class BatchingFindableWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>

Parameters:

condition - the matching condition

matchingMetaInfoHolder - the meta structure of the incoming matchingEvent

variableExpressionExecutors - the list of variable ExpressionExecutors already created

tableMap - map of event tables

state - current query state

siddhiQueryContext - current siddhi query context

Returns:

compiled Condition having the capability of matching events against the incoming matchingEvent

find

public StreamEvent find(StateEvent matchingEvent,
                        CompiledCondition compiledCondition,
                        StreamEventCloner streamEventCloner,
                        io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState state)

Description copied from class: BatchingFindableWindowProcessor

To find events from the processor event pool, that the matches the matchingEvent based on finder logic.

Specified by:

find in class BatchingFindableWindowProcessor<io.siddhi.core.query.processor.stream.window.ExternalTimeBatchWindowProcessor.WindowState>

Parameters:

matchingEvent - the event to be matched with the events at the processor

compiledCondition - the execution element responsible for matching the corresponding events that matches the matchingEvent based on pool of events at Processor

streamEventCloner - stream event cloner

state - current query state @return the matched events

getScheduler

public Scheduler getScheduler()

Specified by:

getScheduler in interface SchedulingProcessor

setScheduler

public void setScheduler(Scheduler scheduler)

Specified by:

setScheduler in interface SchedulingProcessor