C# VS 版本控制中的远程处理 [英] Remoting in C# VS versioning

问题描述

在 C# 中使用远程处理，我连接到不同的服务器.由于我不断在客户端添加功能，服务器端的服务并不总是最新的.

Using Remoting in C#, I'm connecting to different servers. As I'm continuously adding features on the client side, the services on the server side isn't always up to date.

如果我在我的接口中调用了一个方法(在服务器上远程调用该方法)，而在服务器端的实现中不存在该方法，我该如何解决?

How can I solve the issue that if I call a method in my interface (which invokes the method remotely on the server) and this method doesn't exist in the implementation on the server side?

客户端自然崩溃，因为有一个我无法捕获的异常.是的，我可以，但是由于我以这种方式调用了许多不同的方法，因此为每个方法添加异常处理会很痛苦.

The client naturally crashes because there's an exception I cannot catch. Yes I could, but as there are many different Methods I call this way, it would be painful to add Exception handling for each of them.

我想到的一个解决方案"是在我的 MarshalByRefObject 中为每个方法添加一个自定义版本属性.但是我不知道在调用每个方法时如何使用它.我可以为每个方法添加注释/属性，但是如果使用 if 语句询问版本是否足够新，这又会很痛苦.

One "solution" I tought about was to put a custom version-attribute to each of the method in my MarshalByRefObject. But I don't know how to use this afterwards when calling each method. It's okay for me to add an annotation/attribute to each method, but it again would be a pain to have an if statement asking whether the version is new enough or not.

我想到的另一种方法是为此使用继承.

Another way I thought about was to use inheritance for this.

public abstract class AbstractServer1 : MarshalByRefObject
{
    public abstract void feature1();
}

public abstract class AbstractServer2 : AbstractServer1
{
    public abstract featureInVersion2();
    public abstract string reallyNewFeature();
}

public class ServerClass1 : AbstractServer1
{
    public void feature1();
}

public class ServerClass2 : ServerClass1, AbstractServer2
{
    public void featureInVersion2();
    public string reallyNewFeature();
}

但这会导致类似的结果:

But this would result in something like:

public AbstractServer getRemoteObject(string host, int port)
{
    object obj = Activator.GetObject(typeof(AbstractServer2), "tcp://" + host + ":" + port.ToString() + "/ServiceName");
    if (typeof(obj) == ServerClass1)
    {
        ...
    }
}

这既不美观也不行.

有什么好的解决办法吗?

Is there a good solution to this?

备注:不幸的是，在服务器和客户端中使用相同的程序集文件不是一种选择.

Remark: Using the same assembly file in server and client is unfortunately NOT an option.

感谢任何帮助.

推荐答案

在调用服务器端不存在的函数时，您期望什么样的行为?

What kind of behavior do you expect when calling a function that do not exists serverside ?

此代码可能对您有用

它构建了一个代理，它捕获调用实现特定接口的对象成员时发生的每个异常.您可以在 wpf 频道或远程代理的接口成员上使用它.

It builds a proxy which catches every exception that occured when calling members of an object implementing a specific interface. You could use this on wpf channels or on interface members of your Remoting proxies.

IMyInterface myService = [...];
IMyInterface myExceptionLoggedService = ExceptionProxyGenerator.Generate<IMyInterface>(myService);
(myExceptionLoggedService  as IExceptionProxy).Error+=(sender,method,exception)=>{
   // do what you want on exception
};
// Use my service :
myExceptionLoggedService.MyExistingFunction();// ok
myExceptionLoggedService.MyNotExistingFunction();// calling the above delegate

你可以稍微重写这个类以获得你想要的那种行为(比如不重新抛出错误时的异常和返回 null -如果函数没有返回 void-)

You could rewrite a bit this class to have the kind of behavior you want (like not rethrowing the exception on error and returning null -if function is not returning void-)

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