Package io.siddhi.core.query.processor.stream

Class LogStreamProcessor

java.lang.Object

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

io.siddhi.core.query.processor.stream.StreamProcessor<State>

io.siddhi.core.query.processor.stream.LogStreamProcessor

All Implemented Interfaces:

Processor, ExternalReferencedHolder

public class LogStreamProcessor
extends StreamProcessor<State>

Input attributes to log is (priority (String), log.message (String), is.event.logged (Bool))

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	Description
LogStreamProcessor()

Method Summary

Modifier and Type	Method	Description
ProcessingMode	getProcessingMode()	Defines the behaviour of the processing, will be called after the init
List<io.siddhi.query.api.definition.Attribute>	getReturnAttributes()
protected StateFactory	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 StreamFunction
protected void	process(ComplexEventChunk<StreamEvent> streamEventChunk, Processor nextProcessor, StreamEventCloner streamEventCloner, ComplexEventPopulater complexEventPopulater, State state)	The main processing method that will be called upon event arrival
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.StreamProcessor

processEventChunk

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

constructStreamEventPopulater, 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

Constructor Detail

LogStreamProcessor

public LogStreamProcessor()

Method Detail

init

protected StateFactory 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 StreamFunction

Specified by:

init in class AbstractStreamProcessor<State>

Parameters:

metaStreamEvent - the stream event meta

inputDefinition - the incoming stream definition

attributeExpressionExecutors - the executors for the function parameters

configReader - this hold the LogStreamProcessor configuration reader.

streamEventClonerHolder - streamEventCloner Holder

findToBeExecuted - find will be executed

siddhiQueryContext - current siddhi query context

outputExpectsExpiredEvents - is expired events sent as output

Returns:

the additional output attributes introduced by the function

getReturnAttributes

public List<io.siddhi.query.api.definition.Attribute> getReturnAttributes()

Specified by:

getReturnAttributes in class AbstractStreamProcessor<State>

process

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

Description copied from class: StreamProcessor

The main processing method that will be called upon event arrival

Specified by:

process in class StreamProcessor<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 processor state

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.

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.

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<State>

Returns:

ProcessingMode processing mode of the processor