org.apache.dubbo.event

接口 EventListener<E extends Event>

类型参数:

E - the concrete class of Dubbo Event

所有超级接口:

Comparable<Prioritized>, EventListener, Prioritized

所有已知子接口:

ConditionalEventListener<E>

函数接口:

这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。

@SPI
 @FunctionalInterface
public interface EventListener<E extends Event>
extends EventListener, Prioritized

The Dubbo Event Listener that is based on Java standard EventListener interface supports the generic Event.

The handle method will be notified when the matched-type Dubbo Event is published, whose priority could be changed by getPriority() method.

从以下版本开始:

2.7.5

另请参阅:

Event, EventListener

字段概要

从接口继承的字段 org.apache.dubbo.common.lang.Prioritized

COMPARATOR, MAX_PRIORITY, MIN_PRIORITY, NORMAL_PRIORITY

方法概要

限定符和类型	方法和说明
static Class<? extends Event>	findEventType(Class<?> listenerClass) Find the type Dubbo event from the specified Dubbo event listener
static Class<? extends Event>	findEventType(EventListener<?> listener) Find the type Dubbo event from the specified Dubbo event listener
static Class<? extends Event>	findEventType(ParameterizedType parameterizedType) Find the type Dubbo event from the specified ParameterizedType presents a class of Dubbo event listener
default int	getPriority() The priority of current listener.
void	onEvent(E event) Handle a Dubbo Event when it's be published

从接口继承的方法 org.apache.dubbo.common.lang.Prioritized

compareTo

方法详细资料

onEvent

void onEvent(E event)

Handle a Dubbo Event when it's be published

参数:

event - a Dubbo Event

getPriority

default int getPriority()

The priority of current listener.

指定者:

getPriority 在接口中 Prioritized

返回:

the value is more greater, the priority is more lower. Integer.MIN_VALUE indicates the highest priority. The default value is Integer.MAX_VALUE. The comparison rule , refer to Prioritized.compareTo(org.apache.dubbo.common.lang.Prioritized).

findEventType

static Class<? extends Event> findEventType(EventListener<?> listener)

Find the type Dubbo event from the specified Dubbo event listener

参数:

listener - the class of Dubbo event listener

返回:

null if not found

findEventType

static Class<? extends Event> findEventType(Class<?> listenerClass)

Find the type Dubbo event from the specified Dubbo event listener

参数:

listenerClass - the class of Dubbo event listener

返回:

null if not found

findEventType

static Class<? extends Event> findEventType(ParameterizedType parameterizedType)

Find the type Dubbo event from the specified ParameterizedType presents a class of Dubbo event listener

参数:

parameterizedType - the ParameterizedType presents a class of Dubbo event listener

返回:

null if not found