Question

以下是我正在处理的类和接口。

public interface IAccountService
{
    //omitted for brevity...
}
public abstract class UserClientBase<T> : ClientBase<T> where T : class
{
    protected UserClientBase(Binding binding, EndpointAddress remoteAddress, string userName, string password)
        : base(binding, remoteAddress)
    {
        if (ClientCredentials == null) return;

        ClientCredentials.UserName.UserName = userName;
        ClientCredentials.UserName.Password = password;
    }
}
public class AccountProxy : UserClientBase<IAccountService>, IAccountService
{
    private static readonly WSHttpBinding Binding = WcfHelpers.ConfigureWsHttpBinding();
    private static readonly EndpointAddress EndpointAddress =
        new EndpointAddress(@"https://server.project.local/Project/Account/AccountService.svc");

    public AccountProxy(string userName, string password)
        : base(Binding, EndpointAddress, userName, password)
    {
    }

    //omitted for brevity
}
public interface ISafeClient<out TService> : IDisposable where TService : class
{
    //omitted for brevity...
}
public class SafeClient<TClient, TService> : ISafeClient<TService>
    where TClient : UserClientBase<TService>, TService
    where TService : class
{
    //omitted for brevity...
}

public AccountController(ISafeClient<IAccountService> accountProxy)
{
    _accountProxy = accountProxy;
}

我正在使用带有Autofac集成的Asp.net MVC 5，这里是我的Global.asax Application_Start方法中的注册。

var builder = new ContainerBuilder();
builder.RegisterControllers(typeof(MvcApplication).Assembly);
builder.RegisterType<AccountProxy>().As<IAccountService>().InstancePerLifetimeScope();
builder.RegisterGeneric(typeof(SafeClient<,>)).As(typeof(ISafeClient<>)).InstancePerLifetimeScope();

var container = builder.Build();
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

现在，当我尝试浏览AccountController处理的页面时，我在URL中收到以下异常。

没有找到的构造函数类型上的'Autofac.Core.Activators.Reflection.DefaultConstructorFinder' 'MyMvcApp.Controllers.AccountController'可以用。调用可用的服务和参数：无法解析参数 “Project.Client.Proxies.ISafeClient`1 [Project.Client.Contracts.Service.IAccountService] accountProxy'的构造函数'Void

我不确定我在这里缺少什么。当我在运行时查看容器的ComponentRegistry时，我看到了Controllers和AccountProxy。提前谢谢。

更新如果我这样注册它，我可以成功注入一个IAccountService：

builder.Register(a => new AccountProxy("userName", "password")).As<IAccountService>();

但是当我尝试注入ISafeClient时，我仍然会遇到异常。我想这里有一个更大的问题。本质上，我正在尝试包装ClientBase以包含安全处置和重试逻辑。它处理通信和消息异常，故障通道状态等。每次在SafeClient上执行方法时，ClientBase都会重新实例化，然后自动处理掉。如果是这种情况，我是否应该注射它？我很困惑。

更新2： 看起来我可以像这样注册。

builder.RegisterType<SafeClient<AccountProxy, IAccountService>>().As<ISafeClient<IAccountService>>().InstancePerLifetimeScope();

然后我的AccountController更改为：

private readonly ISafeClient<IAccountService> _accountProxy;

public AccountController(ISafeClient<IAccountService> accountProxy)
{
    _accountProxy = accountProxy;
}

这样做是否有任何不利之处，除了明显需要单独注册安全客户端之外？

Autofac寄存器通用多个参数？

0 个答案: