Networking flow

Question

我正在用c#设计一款游戏，我相信你会得到很多-但我的问题有点不同，因为我想围绕观察者模式设计一些东西，以我的理解-我找不到太多的信息。

我所有的包实现一个基本的接口，称为ippacket…当我收到一封某类邮包时，我正希望能引起一件大事。不需要使用大开关

我可能希望是这样的:

networkEvents。packetrecived +=[…]

谁能告诉我该怎么做?

Answer 1

这样怎么样:

public interface IPacket
{
}
public class FooPacket: IPacket {}
public class PacketService
{
    private static readonly ConcurrentDictionary<Type, Action<IPacket>> _Handlers = new ConcurrentDictionary<Type, Action<IPacket>>(new Dictionary<Type, Action<IPacket>>());
    public static void RegisterPacket<T>(Action<T> handler)
        where T: IPacket
    {
        _Handlers[typeof (T)] = packet => handler((T) packet);
    }
    private void ProcessReceivedPacket(IPacket packet)
    {
        Action<IPacket> handler;
        if (!_Handlers.TryGetValue(packet.GetType(), out handler))
        {
            // Error handling here. No packet handler exists for this type of packet.
            return;
        }
        handler(packet);
    }
}
class Program
{
    private static PacketService _PacketService = new PacketService();
    static void Main(string[] args)
    {
        PacketService.RegisterPacket<FooPacket>(HandleFooPacket);
    }
    public static void HandleFooPacket(FooPacket packet)
    {
        // Do something with the packet
    }
}

您创建的每种类型的包都注册一个特定于该类型包的处理程序。使用ConcurrentDictionary使锁定变得多余。