org.wso2.siddhi.core.aggregation

Class BaseIncrementalValueStore

java.lang.Object

org.wso2.siddhi.core.aggregation.BaseIncrementalValueStore

All Implemented Interfaces:

Snapshotable

public class BaseIncrementalValueStore
extends Object
implements Snapshotable

Store for maintaining the base values related to incremental aggregation. (e.g. for average, the base incremental values would be sum and count. The timestamp too is stored here.

Constructor Summary

Constructors

Constructor and Description
BaseIncrementalValueStore(long timeStamp, List<ExpressionExecutor> expressionExecutors, StreamEventPool streamEventPool, SiddhiAppContext siddhiAppContext, String aggregatorName, ExpressionExecutor shouldUpdateExpressionExecutor)

Method Summary

Modifier and Type	Method and Description
void	clearValues()
BaseIncrementalValueStore	cloneStore(String key, long timestamp)
StreamEvent	createStreamEvent()
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()
List<ExpressionExecutor>	getExpressionExecutors()
ExpressionExecutor	getShouldUpdateExpressionExecutor()
long	getTimestamp()
boolean	isProcessed()
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	setProcessed(boolean isProcessed)
void	setTimestamp(long timestamp)
void	setValue(Object value, int position)

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseIncrementalValueStore

public BaseIncrementalValueStore(long timeStamp,
                                 List<ExpressionExecutor> expressionExecutors,
                                 StreamEventPool streamEventPool,
                                 SiddhiAppContext siddhiAppContext,
                                 String aggregatorName,
                                 ExpressionExecutor shouldUpdateExpressionExecutor)

Method Detail

clearValues

public void clearValues()

setTimestamp

public void setTimestamp(long timestamp)

setValue

public void setValue(Object value,
                     int position)

setProcessed

public void setProcessed(boolean isProcessed)

getTimestamp

public long getTimestamp()

getExpressionExecutors

public List<ExpressionExecutor> getExpressionExecutors()

isProcessed

public boolean isProcessed()

createStreamEvent

public StreamEvent createStreamEvent()

cloneStore

public BaseIncrementalValueStore cloneStore(String key,
                                            long timestamp)

getShouldUpdateExpressionExecutor

public ExpressionExecutor getShouldUpdateExpressionExecutor()

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