远程参数配置工具包

计划寒假写一个远程参数配置工具包。

Linux中有大家熟知的proc fs，透过proc fs用户可以很方便地在runtime配置内核参数。

对于一个常规应用程序，如果对外也提供这样一个接口，让用户在运行时能够配置参数，会不会有意思呢?

 

实现一个工具包，对外提供http配置服务，对内可以修改程序运行时参数，控制行为等。

 

/* Currently doesn't support parallel modification. Serialized by lock */

 

class InterfaceService{

       RegisterService(Service *sv, CtrlParam *ctl);       //注册服务回调函数

       UnRegisterService(Service *sv);    //注销服务

};

 

 

class Service{       

public:

        Set();

        Get();

        Act();

        char serviceName[MAX_NAME];

        void *data;

        /* need more things to manage internal state. */

 

};

 

class CtrlParam{

public:

        OutputHTML();

};

 

 

class Server{

public:

        ParseForm();

        OutputHTML();

private:

        FindService(char serviceName[]);

        Service *list;

};

 

 

 

 

简单实现样例：

 

Server::ParseForm(Form *form)

{

             Service *sv;

             sv = FindService(form->GetServiceName());

             if (sv) {

                         if (GET_DATA == form->type){

                                  sv->Get();     // data saved to sv->data

                         }else if(SET_DATA == form->type){

                                  sv->data = form->GetData();

                                  sv->Set();

                         }else if(INVOKE_ACTION == form->type){

                                  sv->data = form->GetData();

                                  sv->Act();

                         }                                 

             }

}

 

Server::OutputHTML()

{

              foreach(list, s){

                          s->OutputHTML();

              }

}

 

 

核心组件：

      HTTP服务器，FORM解释器，动作响应器