org.wso2.siddhi.core.query.output.ratelimit.time

Class FirstGroupByPerTimeOutputRateLimiter

java.lang.Object

org.wso2.siddhi.core.query.output.ratelimit.OutputRateLimiter

org.wso2.siddhi.core.query.output.ratelimit.time.FirstGroupByPerTimeOutputRateLimiter

All Implemented Interfaces:

EternalReferencedHolder, Schedulable, Snapshotable

public class FirstGroupByPerTimeOutputRateLimiter
extends OutputRateLimiter
implements Schedulable

Implementation of OutputRateLimiter which will collect pre-defined time period and the emit only first event. This implementation specifically represent GroupBy queries.

Field Summary

Fields inherited from class org.wso2.siddhi.core.query.output.ratelimit.OutputRateLimiter

latencyTracker, lockWrapper, outputCallback, queryCallbacks, siddhiAppContext

Constructor Summary

Constructors

Constructor and Description
FirstGroupByPerTimeOutputRateLimiter(String id, Long value, ScheduledExecutorService scheduledExecutorService, String queryName)

Method Summary

Modifier and Type	Method and Description
OutputRateLimiter	clone(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
void	process(ComplexEventChunk complexEventChunk)
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	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.output.ratelimit.OutputRateLimiter

addQueryCallback, clean, getElementId, getOutputCallback, hasCallBack, init, sendToCallBacks, setLatencyTracker, setOutputCallback

Methods inherited from class java.lang.Object

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

Constructor Detail

FirstGroupByPerTimeOutputRateLimiter

public FirstGroupByPerTimeOutputRateLimiter(String id,
                                            Long value,
                                            ScheduledExecutorService scheduledExecutorService,
                                            String queryName)

Method Detail

clone

public OutputRateLimiter clone(String key)

Specified by:

clone in class OutputRateLimiter

process

public void process(ComplexEventChunk complexEventChunk)

Specified by:

process in interface Schedulable

Specified by:

process in class OutputRateLimiter

start

public void start()

Description copied from interface: EternalReferencedHolder

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 EternalReferencedHolder

stop

public void stop()

Description copied from interface: EternalReferencedHolder

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 EternalReferencedHolder

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().