Package org.apache.heron.api.windowing.triggers

Class TimeTriggerPolicy<T extends Serializable>

java.lang.Object

org.apache.heron.api.windowing.triggers.AbstractBaseTriggerPolicy<T,Void>

org.apache.heron.api.windowing.triggers.TimeTriggerPolicy<T>

All Implemented Interfaces:

TriggerPolicy<T,Void>

public class TimeTriggerPolicy<T extends Serializable>
extends AbstractBaseTriggerPolicy<T,Void>

Invokes TriggerHandler.onTrigger() after the duration.

Field Summary

Fields inherited from class org.apache.heron.api.windowing.triggers.AbstractBaseTriggerPolicy

evictionPolicy, handler, started, topoConf, windowManager

Constructor Summary

Constructors

Constructor	Description
TimeTriggerPolicy(long millis)

Method Summary

Modifier and Type	Method	Description
Void	getState()	Return runtime state to be checkpointed by the framework for restoring the trigger policy in case of failures.
void	reset()	resets the trigger policy.
void	restoreState(Void state)	Restore the trigger policy from the state that was earlier checkpointed by the framework.
void	shutdown()	Any clean up could be handled here.
void	start()	Starts the trigger policy.
String	toString()
void	track(Event<T> event)	Tracks the event and could use this to invoke the trigger.

Methods inherited from class org.apache.heron.api.windowing.triggers.AbstractBaseTriggerPolicy

setEvictionPolicy, setTopologyConfig, setTriggerHandler, setWindowManager

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeTriggerPolicy

public TimeTriggerPolicy(long millis)

Method Detail

track

public void track(Event<T> event)

Description copied from interface: TriggerPolicy

Tracks the event and could use this to invoke the trigger.

Parameters:

event - the input event

reset

public void reset()

Description copied from interface: TriggerPolicy

resets the trigger policy.

start

public void start()

Description copied from class: AbstractBaseTriggerPolicy

Starts the trigger policy. This can be used during recovery to start the triggers after recovery is complete.

Specified by:

start in interface TriggerPolicy<T extends Serializable,Void>

Overrides:

start in class AbstractBaseTriggerPolicy<T extends Serializable,Void>

shutdown

public void shutdown()

Description copied from interface: TriggerPolicy

Any clean up could be handled here.

toString

public String toString()

Overrides:

toString in class Object

getState

public Void getState()

Description copied from interface: TriggerPolicy

Return runtime state to be checkpointed by the framework for restoring the trigger policy in case of failures.

Returns:

the state

restoreState

public void restoreState(Void state)

Description copied from interface: TriggerPolicy

Restore the trigger policy from the state that was earlier checkpointed by the framework.

Parameters:

state - the state