程序包 org.apache.pulsar.functions.windowing

接口 TriggerPolicy<T,S>

类型参数:

T - the type of the event that is tracked

S - the type of state that is used

所有已知实现类:

CountTriggerPolicy, TimeTriggerPolicy, WatermarkCountTriggerPolicy, WatermarkTimeTriggerPolicy

public interface TriggerPolicy<T,S>

Triggers the window calculations based on the policy.

方法概要

修饰符和类型	方法	说明
S	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(S 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.
void	track(Event<T> event)	Tracks the event and could use this to invoke the trigger.

方法详细资料

track

void track(Event<T> event)

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

参数:

event - the input event

reset

void reset()

resets the trigger policy.

start

void start()

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

shutdown

void shutdown()

Any clean up could be handled here.

getState

S getState()

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

返回:

the state

restoreState

void restoreState(S state)

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

参数:

state - the state