method.invoke导致递归死循环,at com.sun.proxy.$Proxy0.add(Unknown Source)

本文探讨了使用Java反射实现方法拦截时遇到的递归死循环问题,详细分析了问题根源在于代理对象在invoke方法中无限调用自身,最终导致栈溢出错误。

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 今天在用java反射实现方法拦截的时候出现递归死循环的问题,报错信息如下

对比源代码,差别如下,在这个invoke方法里面,proxy会再次调用这个invoke方法,无限循环,导致栈溢出。

视频链接:https://www.youtube.com/watch?v=8zt_HftX-4g

 

@Slf4j
public class ArithmeticCalculateProxy {
    private ArithmeticCalculate target;
    public ArithmeticCalculateProxy(ArithmeticCalculate target){
        this.target = target;
    }
    public ArithmeticCalculate getLogProxy() throws Exception{
        ArithmeticCalculate proxy = null;

        //代理对象由哪一个类加载器负责加载
        ClassLoader loader = target.getClass().getClassLoader();

        //代理对象的类型,获取其中的方法
        Class[] classes = new Class[]{ArithmeticCalculate.class};

        //当调用代理对象其中的方法时,该执行的代码
        InvocationHandler invocationHandler = new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                String methodName = method.getName();
                //日志
                log.info("method name is {}, params is {}", methodName, Arrays.asList(args));
                //方法
                Object ret = method.invoke(proxy, args);
                //日志
                log.info("method name is {}, return value is {}", methodName, ret);
                return 0;
            }
        };
        proxy = (ArithmeticCalculate) Proxy.newProxyInstance(loader, classes, invocationHandler);
        return proxy;
    }
}

 

com.picc.rbvm.exception.runtime.RbvmSerializationException: errCode: 100, errMsg: Rbvm serialize for class [com.picc.rbvm.model.dto.infosync.MsSyncAgentUserInfo] failed. at com.picc.rbvm.util.json.JsonUtils.toObj(JsonUtils.java:61) at com.picc.rbvm.service.infosync.impl.InfoSyncDataServiceImpl.findAgetUser(InfoSyncDataServiceImpl.java:337) at com.picc.rbvm.service.infosync.impl.InfoSyncDataServiceImpl.SyncAgentUser(InfoSyncDataServiceImpl.java:271) at com.picc.rbvm.surface.infosync.InfoSyncDataSurface.SyncAgentUser(InfoSyncDataSurface.java:76) at com.picc.rbvm.controller.infosync.InfoSyncDataController.SyncAgentUser(InfoSyncDataController.java:46) at com.picc.rbvm.controller.infosync.InfoSyncDataController$$FastClassBySpringCGLIB$$f3c976a1.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88) at com.picc.rbvm.aspect.RbvmRequestAspect.doAroundAdvice(RbvmRequestAspect.java:57) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644) at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633) at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation
03-15
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