Spring AOP ProxyFactoryBean源码笔记 一

基础定义：

• Pointcut：切点
• Advice：通知或增强，织入逻辑存在的地方
• Advisor：通知器，可以将切点与通知相结合。

简单demo：

github

接口TestServiceI

public interface TestServiceI {

    void method1();

    void method2();
}

接口实现类TestServiceA

@Service
public class TestServiceA implements TestServiceI {

    @Override
    public void method1() {
        System.out.println("TestServiceA method1...");
    }

    @Override
    public void method2() {
        System.out.println("TestServiceA method2...");
    }
}

另一个没有实现接口的ServiceTestServiceB

@Service
public class TestServiceB {

    public void method1() {
        System.out.println("TestServiceB method1...");
    }
}

通知类MyAdvice

@Component
public class MyAdvice implements MethodBeforeAdvice, AfterReturningAdvice {

    @Override
    public void before(Method method, Object[] args, Object target) {
        System.out.println("before...");
    }

    @Override
    public void afterReturning(Object returnValue, Method method, Object[] args, Object target) {
        System.out.println("after...");
    }
}

Aop配置AopConfiguration

@Configuration
public class AopConfiguration {

    @Autowired
    private TestServiceA testServiceA;
    @Autowired
    private TestServiceB testServiceB;

    @Bean
    public ProxyFactoryBean proxyFactoryBeanA() throws ClassNotFoundException {
        ProxyFactoryBean proxyFactoryBean = new ProxyFactoryBean();
        proxyFactoryBean.setProxyInterfaces(new Class[]{TestServiceI.class});
        proxyFactoryBean.setTarget(testServiceA);
        proxyFactoryBean.setInterceptorNames("myAdvice");
        return proxyFactoryBean;
    }

    @Bean
    public ProxyFactoryBean proxyFactoryBeanB() {
        ProxyFactoryBean proxyFactoryBean = new ProxyFactoryBean();
        proxyFactoryBean.setTarget(testServiceB);
        proxyFactoryBean.setInterceptorNames("myAdvice");
        return proxyFactoryBean;
    }
}

运行Aop test1

public class Aop {

    @Test
    public void test1() {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext("com.tianwen.spring");
        TestServiceI testServiceA = (TestServiceI) context.getBean("proxyFactoryBeanA");
        testServiceA.method1();
        System.out.println("---");
        testServiceA.method2();
        System.out.println("---");
        TestServiceB testServiceB = (TestServiceB) context.getBean("proxyFactoryBeanB");
        testServiceB.method1();
    }
}

运行结果：

before...
TestServiceA method1...
after...
---
before...
TestServiceA method2...
after...
---
before...
TestServiceB method1...
after...

TestServiceA在AopConfiguration中配置了代理接口，故代理类由JDK生成，TestServiceB的代理类由Cglib生成。

代理类的生成过程：

ProxyFactoryBean是FactoryBean 查看getObject()方法。

public class ProxyFactoryBean extends ProxyCreatorSupport
        implements FactoryBean