spring aop 笔记2

spring aop的自动代理
BeanNameAutoProxyCreator为名字匹配字符串或者通配符的bean自动创建AOP代理。

java 代码

public class AutoBean {

    public void foo() {
        System.out.println("foo()");
    }
}

通知

java 代码

package aop;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

public class SimpleBeforeAdvice implements MethodBeforeAdvice{

    public void before(Method method, Object[] arg1, Object arg2) throws Throwable {

        System.out.println("Bofore method:"+ method );
    }

}

配制

java 代码

"-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
   <beans>  </beans>

                     class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">

                          
    <list>  </list>
                           <value>foo*</value>
                          <value>barBean</value>



                          
    <list>  </list>
                            <value>advice</value>

test

java 代码

package aop;

import org.springframework.aop.support.AopUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class IntroductionConfigExample {

    public static void main(String[] args) {
        ApplicationContext ctx = new FileSystemXmlApplicationContext(
                "./src/beans.xml");

        AutoBean autoBean = (AutoBean)ctx.getBean("fooBean");
        AutoBean autoBean1 = (AutoBean)ctx.getBean("barBean");
//        OtherBean otherBean = (OtherBean)ctx.getBean("otherBean");

        autoBean.foo();
        System.out.println(AopUtils.isAopProxy(autoBean));

//        otherBean.foo();
//        System.out.println(AopUtils.isAopProxy(otherBean));


    }
}

DefaultAdvisorAutoProxyCreator

一个更加通用而且强大得多的自动代理创建器是DefaultAdvisorAutoProxyCreator。它自动应用当前上下文中适当的advisor，无需在自动代理advisor的bean定义中包括bean的名字。 比起BeanNameAutoProxyCreator，它提供了同样关于一致性配置的优点而避免了前者的重复性。

可以向每个业务对象应用任意数量的advisor。对于一个业务对象，如果没有任何advisor中的切入点匹配它的任何方法，这个对象将不会被代理。

java 代码

package aop2;

public class AutoBean {

    public void foo() {
        System.out.println("foo()");
    }
}

java 代码

package aop2;
public class OtherBean {

    public void foo() {
        System.out.println("foo()");
    }
}

java 代码

package aop2;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

public class SimpleBeforeAdvice implements MethodBeforeAdvice{

    public void before(Method method, Object[] arg1, Object arg2) throws Throwable {

        System.out.println("Bofore method:"+ method );
    }

}

定义pointcut

java 代码

package aop2;

import org.springframework.aop.ClassFilter;
import org.springframework.aop.MethodMatcher;
import org.springframework.aop.Pointcut;

public class MyPointcut implements Pointcut {

    public ClassFilter getClassFilter() {
        return new ClassFilter() {

            public boolean matches(Class cls) {
                return (cls == AutoBean.class);  //只代理autobean
            }
        };
    }

    public MethodMatcher getMethodMatcher() {
        return MethodMatcher.TRUE;
    }
}

java 代码

package aop2;

import org.springframework.aop.support.AopUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class DefaultCreatorExample {
    public static void main(String[] args) {
        ApplicationContext ctx = new FileSystemXmlApplicationContext(
        "./src/beans1.xml");

        AutoBean autoBean = (AutoBean)ctx.getBean("autoBean");
        OtherBean otherBean = (OtherBean)ctx.getBean("otherBean");

        autoBean.foo();
        System.out.println(AopUtils.isAopProxy(autoBean));

        otherBean.foo();
        System.out.println(AopUtils.isAopProxy(otherBean));
    }

}

配制

<beans><bean id="proxyCreator"><bean id="autoBean" class="aop2.AutoBean"><bean id="otherBean" class="aop2.OtherBean"><bean id="advisor"> <property name="pointcut">
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
   
    <bean id="proxyCreator">
class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>
   
    <bean id="autoBean" class="aop2.AutoBean">
    <bean id="otherBean" class="aop2.OtherBean">
   
    <bean id="advisor">
          class="org.springframework.aop.support.DefaultPointcutAdvisor">
           <property name="pointcut">
               <bean class="aop2.MyPointcut">
           </bean>
           <property name="advice">
               <bean class="aop2.SimpleBeforeAdvice">
           </bean>
    </property>
</property>

               <bean class="aop2.MyPointcut">
           </bean>
           <property name="advice">
               <bean class="aop2.SimpleBeforeAdvice">
           </bean>
    </property>
</bean> </bean></bean></bean></beans></property> </bean></bean></bean></bean></beans>

评论

2 楼 lindongxiao 2007-07-16  

DefaultAdvisorAutoProxyCreator配制
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
   
    <bean id="proxyCreator"
class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>
   
    <bean id="autoBean" class="aop2.AutoBean"/>
    <bean id="otherBean" class="aop2.OtherBean"/>
   
    <bean id="advisor"
          class="org.springframework.aop.support.DefaultPointcutAdvisor">
           <property name="pointcut">
               <bean class="aop2.MyPointcut"/>
           </property>
           <property name="advice">
               <bean class="aop2.SimpleBeforeAdvice"/>
           </property>
    </bean>
</beans>

1 楼 lindongxiao 2007-07-16  

BeanNameAutoProxyCreators配制
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <bean id="proxyCreator"          
      class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
        <property name="beanNames">
             <list>
                <value>foo*</value>
                <value>barBean</value>
            </list>
            </property>   
        <property name="interceptorNames">
            <list>
                <value>advice</value>
            </list>
        </property>
    </bean>
   
    <bean id="fooBean" class="aop.AutoBean"/>
    <bean id="barBean" class="aop.AutoBean"/>
   
    <bean id="advice" class="aop.SimpleBeforeAdvice"/>

</beans>