Package org.apache.storm.windowing

Class TimeTriggerPolicy<T>

java.lang.Object

org.apache.storm.windowing.TimeTriggerPolicy<T>

All Implemented Interfaces:

TriggerPolicy<T,Void>

public class TimeTriggerPolicy<T>
extends Object
implements TriggerPolicy<T,Void>

Invokes TriggerHandler.onTrigger() after the duration.

Constructor Summary

Constructors

Constructor	Description
TimeTriggerPolicy(long millis, TriggerHandler handler)
TimeTriggerPolicy(long millis, TriggerHandler handler, EvictionPolicy<T,?> evictionPolicy)

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 java.lang.Object

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

Constructor Details

TimeTriggerPolicy

public TimeTriggerPolicy(long millis,
 TriggerHandler handler)

TimeTriggerPolicy

public TimeTriggerPolicy(long millis,
 TriggerHandler handler,
 EvictionPolicy<T,?> evictionPolicy)

Method Details

track

public void track(Event<T> event)

Description copied from interface: TriggerPolicy

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

Specified by:

track in interface TriggerPolicy<T,Void>

Parameters:

event - the input event

reset

public void reset()

Description copied from interface: TriggerPolicy

resets the trigger policy.

Specified by:

reset in interface TriggerPolicy<T,Void>

start

public void start()

Description copied from interface: TriggerPolicy

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,Void>

shutdown

public void shutdown()

Description copied from interface: TriggerPolicy

Any clean up could be handled here.

Specified by:

shutdown in interface TriggerPolicy<T,Void>

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.

Specified by:

getState in interface TriggerPolicy<T,Void>

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.

Specified by:

restoreState in interface TriggerPolicy<T,Void>

Parameters:

state - the state