Dubbo回调onreturn、onthrow

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Dubbo
StaticContext.getSystemContext();
//attributes通过系统context进行存储.
StaticContext.getSystemContext().putAll(attributes);
com.alibaba.dubbo.config.ReferenceConfig#init
解析方法上的属性（回调方法）
appendAttributes(attributes, method, prifix + "." + method.getName());
checkAndConvertImplicitConfig(method, map, attributes);

com.alibaba.dubbo.rpc.StaticContext#getContext 回调的集合
方法存在缺陷：如果存在多个onreturn、onthrow的话，方法名不能相同，如果相同就会出现回调覆盖现象
com.alibaba.dubbo.common.utils.ReflectUtils#findMethodByMethodSignature
public static Method findMethodByMethodSignature(Class clazz, String methodName, String[] parameterTypes)
        throws NoSuchMethodException, ClassNotFoundException {
    String signature = methodName;
        if(parameterTypes != null && parameterTypes.length > 0){
            signature = methodName + StringUtils.join(parameterTypes);
        }
        Method method = Signature_METHODS_CACHE.get(signature);
        if(method != null){
            return method;
        }


                         timeout="500" retries="0" mock="true" check="false">