org.springframework.context.event

类 ApplicationListenerMethodAdapter

java.lang.Object

org.springframework.context.event.ApplicationListenerMethodAdapter

所有已实现的接口:

EventListener, ApplicationListener<ApplicationEvent>, GenericApplicationListener, org.springframework.core.Ordered

public class ApplicationListenerMethodAdapter
extends Object
implements GenericApplicationListener

GenericApplicationListener adapter that delegates the processing of an event to an EventListener annotated method.

Delegates to processEvent(ApplicationEvent) to give sub-classes a chance to deviate from the default. Unwraps the content of a PayloadApplicationEvent if necessary to allow method declaration to define any arbitrary event type. If a condition is defined, it is evaluated prior to invoking the underlying method.

从以下版本开始:

4.2

作者:

Stephane Nicoll, Juergen Hoeller, Sam Brannen

字段概要

字段

限定符和类型	字段和说明
protected Log	logger

从接口继承的字段 org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

构造器概要

构造器

构造器和说明
ApplicationListenerMethodAdapter(String beanName, Class<?> targetClass, Method method)

方法概要

限定符和类型	方法和说明
protected Object	doInvoke(Object... args) Invoke the event listener method with the given argument values.
protected String	getCondition() Return the condition to use.
protected String	getDetailedErrorMessage(Object bean, String message) Add additional details such as the bean type and method signature to the given error message.
int	getOrder()
protected Object	getTargetBean() Return the target bean instance to use.
protected void	handleResult(Object result)
void	onApplicationEvent(ApplicationEvent event) Handle an application event.
void	processEvent(ApplicationEvent event) Process the specified ApplicationEvent, checking if the condition match and handling non-null result, if any.
protected Object[]	resolveArguments(ApplicationEvent event) Resolve the method arguments to use for the specified ApplicationEvent.
boolean	supportsEventType(org.springframework.core.ResolvableType eventType) Determine whether this listener actually supports the given event type.
boolean	supportsSourceType(Class<?> sourceType) Determine whether this listener actually supports the given source type.
String	toString()

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

logger

protected final Log logger

构造器详细资料

ApplicationListenerMethodAdapter

public ApplicationListenerMethodAdapter(String beanName,
                                        Class<?> targetClass,
                                        Method method)

方法详细资料

onApplicationEvent

public void onApplicationEvent(ApplicationEvent event)

从接口复制的说明: ApplicationListener

Handle an application event.

指定者:

onApplicationEvent 在接口中 ApplicationListener<ApplicationEvent>

参数:

event - the event to respond to

supportsEventType

public boolean supportsEventType(org.springframework.core.ResolvableType eventType)

从接口复制的说明: GenericApplicationListener

Determine whether this listener actually supports the given event type.

指定者:

supportsEventType 在接口中 GenericApplicationListener

参数:

eventType - the event type (never null)

supportsSourceType

public boolean supportsSourceType(@Nullable
                                  Class<?> sourceType)

从接口复制的说明: GenericApplicationListener

Determine whether this listener actually supports the given source type.

指定者:

supportsSourceType 在接口中 GenericApplicationListener

参数:

sourceType - the source type, or null if no source

getOrder

public int getOrder()

指定者:

getOrder 在接口中 org.springframework.core.Ordered

processEvent

public void processEvent(ApplicationEvent event)

Process the specified ApplicationEvent, checking if the condition match and handling non-null result, if any.

resolveArguments

@Nullable
protected Object[] resolveArguments(ApplicationEvent event)

Resolve the method arguments to use for the specified ApplicationEvent.

These arguments will be used to invoke the method handled by this instance. Can return null to indicate that no suitable arguments could be resolved and therefore the method should not be invoked at all for the specified event.

handleResult

protected void handleResult(Object result)

doInvoke

@Nullable
protected Object doInvoke(Object... args)

Invoke the event listener method with the given argument values.

getTargetBean

protected Object getTargetBean()

Return the target bean instance to use.

getCondition

@Nullable
protected String getCondition()

Return the condition to use.

Matches the condition attribute of the EventListener annotation or any matching attribute on a composed annotation that is meta-annotated with @EventListener.

getDetailedErrorMessage

protected String getDetailedErrorMessage(Object bean,
                                         String message)

Add additional details such as the bean type and method signature to the given error message.

参数:

message - error message to append the HandlerMethod details to

toString

public String toString()

覆盖:

toString 在类中 Object