org.wso2.siddhi.core.query.input.stream.state

Class StreamPreStateProcessor

java.lang.Object

org.wso2.siddhi.core.query.input.stream.state.StreamPreStateProcessor

All Implemented Interfaces:

PreStateProcessor, Processor, Snapshotable

Direct Known Subclasses:

AbsentStreamPreStateProcessor, CountPreStateProcessor, LogicalPreStateProcessor

public class StreamPreStateProcessor
extends Object
implements PreStateProcessor, Snapshotable

The processor the gets executes before checking state conditions.

Field Summary

Fields

Modifier and Type	Field and Description
protected ComplexEventChunk<StateEvent>	currentStateEventChunk
protected String	elementId
protected boolean	isStartState
protected ReentrantLock	lock
protected LinkedList<StateEvent>	newAndEveryStateEventList
protected Processor	nextProcessor
protected LinkedList<StateEvent>	pendingStateEventList
protected String	queryName
protected SiddhiAppContext	siddhiAppContext
protected int[]	startStateIds
protected boolean	stateChanged
protected StateEventCloner	stateEventCloner
protected StateEventPool	stateEventPool
protected int	stateId
protected org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type	stateType
protected StreamEventCloner	streamEventCloner
protected StreamEventPool	streamEventPool
protected StreamPostStateProcessor	thisLastProcessor
protected StreamPostStateProcessor	thisStatePostProcessor
protected PreStateProcessor	withinEveryPreStateProcessor
protected long	withinTime

Constructor Summary

Constructors

Constructor and Description
StreamPreStateProcessor(org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type stateType)

Method Summary

Modifier and Type	Method and Description
void	addEveryState(StateEvent stateEvent)
void	addState(StateEvent stateEvent)
void	clean() Used to clean its references
PreStateProcessor	cloneProcessor(String key) Clone a copy of processor
protected void	cloneProperties(StreamPreStateProcessor streamPreStateProcessor, String key)
Map<String,Object>	currentState() Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time
String	getElementId()
Processor	getNextProcessor() Get next processor element in the processor chain.
int	getStateId()
StreamPostStateProcessor	getThisLastProcessor()
StreamPostStateProcessor	getThisStatePostProcessor()
void	init()
void	init(SiddhiAppContext siddhiAppContext, String queryName)
protected boolean	isExpired(StateEvent pendingStateEvent, long currentTimestamp)
boolean	isStartState()
void	process(ComplexEventChunk complexEventChunk) Process the handed StreamEvent
protected void	process(StateEvent stateEvent)
ComplexEventChunk<StateEvent>	processAndReturn(ComplexEventChunk complexEventChunk)
protected boolean	removeOnNoStateChange(org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type stateType)
void	resetState()
void	restoreState(Map<String,Object> state) Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.
void	setNextProcessor(Processor processor) Set next processor element in processor chain
void	setStartState(boolean isStartState)
void	setStartStateIds(int[] stateIds)
void	setStateEventCloner(StateEventCloner stateEventCloner)
void	setStateEventPool(StateEventPool stateEventPool)
void	setStateId(int stateId)
void	setStreamEventCloner(StreamEventCloner streamEventCloner)
void	setStreamEventPool(StreamEventPool streamEventPool)
void	setThisLastProcessor(StreamPostStateProcessor thisLastProcessor)
void	setThisStatePostProcessor(StreamPostStateProcessor thisStatePostProcessor)
void	setToLast(Processor processor) Set as the last element of the processor chain
void	setWithinEveryPreStateProcessor(PreStateProcessor withinEveryPreStateProcessor)
void	setWithinTime(long withinTime)
void	stateChanged()
void	updateState()

Methods inherited from class java.lang.Object

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

Field Detail

stateId

protected int stateId

isStartState

protected boolean isStartState

stateChanged

protected volatile boolean stateChanged

stateType

protected org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type stateType

withinTime

protected long withinTime

startStateIds

protected int[] startStateIds

withinEveryPreStateProcessor

protected PreStateProcessor withinEveryPreStateProcessor

siddhiAppContext

protected SiddhiAppContext siddhiAppContext

elementId

protected String elementId

thisStatePostProcessor

protected StreamPostStateProcessor thisStatePostProcessor

thisLastProcessor

protected StreamPostStateProcessor thisLastProcessor

nextProcessor

protected Processor nextProcessor

currentStateEventChunk

protected ComplexEventChunk<StateEvent> currentStateEventChunk

pendingStateEventList

protected LinkedList<StateEvent> pendingStateEventList

newAndEveryStateEventList

protected LinkedList<StateEvent> newAndEveryStateEventList

lock

protected ReentrantLock lock

stateEventPool

protected StateEventPool stateEventPool

streamEventCloner

protected StreamEventCloner streamEventCloner

stateEventCloner

protected StateEventCloner stateEventCloner

streamEventPool

protected StreamEventPool streamEventPool

queryName

protected String queryName

Constructor Detail

StreamPreStateProcessor

public StreamPreStateProcessor(org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type stateType)

Method Detail

init

public void init(SiddhiAppContext siddhiAppContext,
                 String queryName)

getThisStatePostProcessor

public StreamPostStateProcessor getThisStatePostProcessor()

Specified by:

getThisStatePostProcessor in interface PreStateProcessor

setThisStatePostProcessor

public void setThisStatePostProcessor(StreamPostStateProcessor thisStatePostProcessor)

process

public void process(ComplexEventChunk complexEventChunk)

Process the handed StreamEvent

Specified by:

process in interface Processor

Parameters:

complexEventChunk - event chunk to be processed

isExpired

protected boolean isExpired(StateEvent pendingStateEvent,
                            long currentTimestamp)

process

protected void process(StateEvent stateEvent)

getNextProcessor

public Processor getNextProcessor()

Get next processor element in the processor chain. Processed event should be sent to next processor

Specified by:

getNextProcessor in interface Processor

Returns:

Processor next processor

setNextProcessor

public void setNextProcessor(Processor processor)

Set next processor element in processor chain

Specified by:

setNextProcessor in interface Processor

Parameters:

processor - Processor to be set as next element of processor chain

setToLast

public void setToLast(Processor processor)

Set as the last element of the processor chain

Specified by:

setToLast in interface Processor

Parameters:

processor - Last processor in the chain

init

public void init()

Specified by:

init in interface PreStateProcessor

getThisLastProcessor

public StreamPostStateProcessor getThisLastProcessor()

setThisLastProcessor

public void setThisLastProcessor(StreamPostStateProcessor thisLastProcessor)

cloneProcessor

public PreStateProcessor cloneProcessor(String key)

Clone a copy of processor

Specified by:

cloneProcessor in interface PreStateProcessor

Specified by:

cloneProcessor in interface Processor

Parameters:

key - partition key

Returns:

clone of StreamPreStateProcessor

cloneProperties

protected void cloneProperties(StreamPreStateProcessor streamPreStateProcessor,
                               String key)

addState

public void addState(StateEvent stateEvent)

Specified by:

addState in interface PreStateProcessor

addEveryState

public void addEveryState(StateEvent stateEvent)

Specified by:

addEveryState in interface PreStateProcessor

setWithinEveryPreStateProcessor

public void setWithinEveryPreStateProcessor(PreStateProcessor withinEveryPreStateProcessor)

Specified by:

setWithinEveryPreStateProcessor in interface PreStateProcessor

stateChanged

public void stateChanged()

setStartState

public void setStartState(boolean isStartState)

Specified by:

setStartState in interface PreStateProcessor

isStartState

public boolean isStartState()

Specified by:

isStartState in interface PreStateProcessor

setStateEventPool

public void setStateEventPool(StateEventPool stateEventPool)

setStreamEventPool

public void setStreamEventPool(StreamEventPool streamEventPool)

setStreamEventCloner

public void setStreamEventCloner(StreamEventCloner streamEventCloner)

setStateEventCloner

public void setStateEventCloner(StateEventCloner stateEventCloner)

resetState

public void resetState()

Specified by:

resetState in interface PreStateProcessor

updateState

public void updateState()

Specified by:

updateState in interface PreStateProcessor

processAndReturn

public ComplexEventChunk<StateEvent> processAndReturn(ComplexEventChunk complexEventChunk)

Specified by:

processAndReturn in interface PreStateProcessor

removeOnNoStateChange

protected boolean removeOnNoStateChange(org.wso2.siddhi.query.api.execution.query.input.stream.StateInputStream.Type stateType)

getStateId

public int getStateId()

Specified by:

getStateId in interface PreStateProcessor

setStateId

public void setStateId(int stateId)

Specified by:

setStateId in interface PreStateProcessor

currentState

public Map<String,Object> currentState()

Description copied from interface: Snapshotable

Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time

Specified by:

currentState in interface Snapshotable

Returns:

stateful objects of the processing element as an array

restoreState

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

Description copied from interface: Snapshotable

Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Specified by:

restoreState in interface Snapshotable

Parameters:

state - the stateful objects of the element as an array on the same order provided by currentState().

getElementId

public String getElementId()

Specified by:

getElementId in interface Snapshotable

clean

public void clean()

Description copied from interface: Processor

Used to clean its references

Specified by:

clean in interface Processor

Specified by:

clean in interface Snapshotable

setWithinTime

public void setWithinTime(long withinTime)

Specified by:

setWithinTime in interface PreStateProcessor

setStartStateIds

public void setStartStateIds(int[] stateIds)

Specified by:

setStartStateIds in interface PreStateProcessor