org.wso2.extension.siddhi.execution.graph

Class LargestConnectedComponentProcessor

java.lang.Object

org.wso2.siddhi.core.query.processor.stream.AbstractStreamProcessor

org.wso2.siddhi.core.query.processor.stream.StreamProcessor

org.wso2.extension.siddhi.execution.graph.LargestConnectedComponentProcessor

All Implemented Interfaces:

org.wso2.siddhi.core.query.processor.Processor, org.wso2.siddhi.core.util.extension.holder.EternalReferencedHolder, org.wso2.siddhi.core.util.snapshot.Snapshotable

public class LargestConnectedComponentProcessor
extends org.wso2.siddhi.core.query.processor.stream.StreamProcessor

Operator which is related to find the size of the largest connected component of a graph.

Field Summary

Fields inherited from class org.wso2.siddhi.core.query.processor.stream.StreamProcessor

outputExpectsExpiredEvents

Fields inherited from class org.wso2.siddhi.core.query.processor.stream.AbstractStreamProcessor

additionalAttributes, attributeExpressionExecutors, attributeExpressionLength, complexEventPopulater, elementId, inputDefinition, nextProcessor, queryName, siddhiAppContext, streamEventCloner

Constructor Summary

Constructors

Constructor and Description
LargestConnectedComponentProcessor()

Method Summary

Modifier and Type	Method and Description
Map<String,Object>	currentState()
protected List<org.wso2.siddhi.query.api.definition.Attribute>	init(org.wso2.siddhi.query.api.definition.AbstractDefinition inputDefinition, org.wso2.siddhi.core.executor.ExpressionExecutor[] attributeExpressionExecutors, org.wso2.siddhi.core.util.config.ConfigReader configReader, org.wso2.siddhi.core.config.SiddhiAppContext siddhiAppContext) The init method of the LargestConnectedComponentProcessor, this method will be called before other methods
protected void	process(org.wso2.siddhi.core.event.ComplexEventChunk<org.wso2.siddhi.core.event.stream.StreamEvent> streamEventChunk, org.wso2.siddhi.core.query.processor.Processor nextProcessor, org.wso2.siddhi.core.event.stream.StreamEventCloner streamEventCloner, org.wso2.siddhi.core.event.stream.populater.ComplexEventPopulater complexEventPopulater) The main processing method that will be called upon event arrival
void	restoreState(Map<String,Object> state)
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 org.wso2.siddhi.core.query.processor.stream.StreamProcessor

init, processEventChunk

Methods inherited from class org.wso2.siddhi.core.query.processor.stream.AbstractStreamProcessor

cloneProcessor, constructStreamEventPopulater, getElementId, getNextProcessor, initProcessor, process, setNextProcessor, setStreamEventCloner, setToLast

Methods inherited from class java.lang.Object

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

Constructor Detail

LargestConnectedComponentProcessor

public LargestConnectedComponentProcessor()

Method Detail

process

protected void process(org.wso2.siddhi.core.event.ComplexEventChunk<org.wso2.siddhi.core.event.stream.StreamEvent> streamEventChunk,
                       org.wso2.siddhi.core.query.processor.Processor nextProcessor,
                       org.wso2.siddhi.core.event.stream.StreamEventCloner streamEventCloner,
                       org.wso2.siddhi.core.event.stream.populater.ComplexEventPopulater complexEventPopulater)

The main processing method that will be called upon event arrival

Specified by:

process in class org.wso2.siddhi.core.query.processor.stream.StreamProcessor

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

init

protected List<org.wso2.siddhi.query.api.definition.Attribute> init(org.wso2.siddhi.query.api.definition.AbstractDefinition inputDefinition,
                                                                    org.wso2.siddhi.core.executor.ExpressionExecutor[] attributeExpressionExecutors,
                                                                    org.wso2.siddhi.core.util.config.ConfigReader configReader,
                                                                    org.wso2.siddhi.core.config.SiddhiAppContext siddhiAppContext)

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

Specified by:

init in class org.wso2.siddhi.core.query.processor.stream.StreamProcessor

Parameters:

inputDefinition - the incoming stream definition

attributeExpressionExecutors - the executors of each function parameters

configReader - explain here

siddhiAppContext - the context of the execution plan

Returns:

the additional output attributes introduced by the function

start

public void start()

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()

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.

currentState

public Map<String,Object> currentState()

restoreState

public void restoreState(Map<String,Object> state)