org.springframework.aop.interceptor

类 ExposeInvocationInterceptor

java.lang.Object

org.springframework.aop.interceptor.ExposeInvocationInterceptor

所有已实现的接口:

Serializable, Advice, Interceptor, MethodInterceptor, org.springframework.core.Ordered, org.springframework.core.PriorityOrdered

public class ExposeInvocationInterceptor
extends Object
implements MethodInterceptor, org.springframework.core.PriorityOrdered, Serializable

Interceptor that exposes the current MethodInvocation as a thread-local object. We occasionally need to do this; for example, when a pointcut (e.g. an AspectJ expression pointcut) needs to know the full invocation context.

Don't use this interceptor unless this is really necessary. Target objects should not normally know about Spring AOP, as this creates a dependency on Spring API. Target objects should be plain POJOs as far as possible.

If used, this interceptor will normally be the first in the interceptor chain.

作者:

Rod Johnson, Juergen Hoeller

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static Advisor	ADVISOR Singleton advisor for this class.
static ExposeInvocationInterceptor	INSTANCE Singleton instance of this class

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

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

方法概要

限定符和类型	方法和说明
static MethodInvocation	currentInvocation() Return the AOP Alliance MethodInvocation object associated with the current invocation.
int	getOrder()
Object	invoke(MethodInvocation mi) 方法实现说明

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

public static final ExposeInvocationInterceptor INSTANCE

Singleton instance of this class

ADVISOR

public static final Advisor ADVISOR

Singleton advisor for this class. Use in preference to INSTANCE when using Spring AOP, as it prevents the need to create a new Advisor to wrap the instance.

方法详细资料

currentInvocation

public static MethodInvocation currentInvocation()
                                          throws IllegalStateException

Return the AOP Alliance MethodInvocation object associated with the current invocation.

返回:

the invocation object associated with the current invocation

抛出:

IllegalStateException - if there is no AOP invocation in progress, or if the ExposeInvocationInterceptor was not added to this interceptor chain

invoke

public Object invoke(MethodInvocation mi)
              throws Throwable

从接口复制的说明: MethodInterceptor

方法实现说明

指定者:

invoke 在接口中 MethodInterceptor

参数:

mi - 主要实现类:ReflectiveMethodInvocation

抛出:

Throwable

getOrder

public int getOrder()

指定者:

getOrder 在接口中 org.springframework.core.Ordered