程序包 org.apache.pulsar.functions.windowing.evictors

类 CountEvictionPolicy<T>

java.lang.Object

org.apache.pulsar.functions.windowing.evictors.CountEvictionPolicy<T>

类型参数:

T - the type of event tracked by this policy.

所有已实现的接口:

EvictionPolicy<T,Long>

public class CountEvictionPolicy<T>
extends Object
implements EvictionPolicy<T,Long>

An eviction policy that tracks event counts and can evict based on a threshold count.

嵌套类概要

从接口继承的嵌套类/接口 org.apache.pulsar.functions.windowing.EvictionPolicy

EvictionPolicy.Action

字段概要

字段

修饰符和类型	字段	说明
protected final AtomicLong	currentCount
protected final int	threshold

构造器概要

构造器

构造器	说明
CountEvictionPolicy(int count)

方法概要

修饰符和类型	方法	说明
EvictionPolicy.Action	evict(Event<T> event)	Decides if an event should be expired from the window, processed in the current window or kept for later processing.
EvictionContext	getContext()	Returns the current context that is part of this eviction policy.
Long	getState()	Return runtime state to be checkpointed by the framework for restoring the eviction policy in case of failures.
void	reset()	Resets the eviction policy.
void	restoreState(Long state)	Restore the eviction policy from the state that was earlier checkpointed by the framework.
void	setContext(EvictionContext context)	Sets a context in the eviction policy that can be used while evicting the events.
String	toString()
void	track(Event<T> event)	Tracks the event to later decide whether EvictionPolicy.evict(Event) should evict it or not.

从类继承的方法 java.lang.Object

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

字段详细资料

threshold

protected final int threshold

currentCount

protected final AtomicLong currentCount

构造器详细资料

CountEvictionPolicy

public CountEvictionPolicy(int count)

方法详细资料

evict

public EvictionPolicy.Action evict(Event<T> event)

从接口复制的说明: EvictionPolicy

Decides if an event should be expired from the window, processed in the current window or kept for later processing.

指定者:

evict 在接口中 EvictionPolicy<T,Long>

参数:

event - the input event

返回:

the EvictionPolicy.Action to be taken based on the input event

track

public void track(Event<T> event)

从接口复制的说明: EvictionPolicy

Tracks the event to later decide whether EvictionPolicy.evict(Event) should evict it or not.

指定者:

track 在接口中 EvictionPolicy<T,Long>

参数:

event - the input event to be tracked

setContext

public void setContext(EvictionContext context)

从接口复制的说明: EvictionPolicy

Sets a context in the eviction policy that can be used while evicting the events. E.g. For TimeEvictionPolicy, this could be used to set the reference timestamp.

指定者:

setContext 在接口中 EvictionPolicy<T,Long>

参数:

context - the eviction context

getContext

public EvictionContext getContext()

从接口复制的说明: EvictionPolicy

Returns the current context that is part of this eviction policy.

指定者:

getContext 在接口中 EvictionPolicy<T,Long>

返回:

the eviction context

toString

public String toString()

覆盖:

toString 在类中 Object

reset

public void reset()

从接口复制的说明: EvictionPolicy

Resets the eviction policy.

指定者:

reset 在接口中 EvictionPolicy<T,Long>

getState

public Long getState()

从接口复制的说明: EvictionPolicy

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

指定者:

getState 在接口中 EvictionPolicy<T,Long>

返回:

the state

restoreState

public void restoreState(Long state)

从接口复制的说明: EvictionPolicy

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

指定者:

restoreState 在接口中 EvictionPolicy<T,Long>

参数:

state - the state