我需要根据租户的owin值解析DbContext。但是在hub的OnDisconnected方法的管道中,HttpContext是not accessible .
我的集线器类:
public class UserTrackingHub : Hub
{
private readonly UserContext _context;
public UserTrackingHub(UserContext context) { ... }
public override async Task OnConnected() { /* OK HERE...*/ }
public override async Task OnDisconnected(bool stopCalled)
{
// NEVER FIRES WITH IF I USE THE CTOR INJECTION.
var connection = await _context.Connections.FindAsync(Context.ConnectionId);
if (connection != null)
{
_context.Connections.Remove(connection);
await _context.SaveChangesAsync();
}
}
}
这是我的 Autofac 配置:
public static IContainer Register(IAppBuilder app)
{
var builder = new ContainerBuilder();
// Other registers...
builder.Register<UserContext>(c =>
{
// Details and conditions omitted for brevity.
var context = HttpContext.Current; // NULL in OnDisconnected pipeline.
var owinContext = context.GetOwinContext();
var tenant = owinContext.Environment["app.tenant"].ToString();
var connection = GetConnectionString(tenant);
return new UserContext(connection);
});
var container = builder.Build();
var config = new HubConfiguration
{
Resolver = new AutofacDependencyResolver(container)
};
app.MapSignalR(config);
return container;
}
有人可以帮助我以这种方式或任何其他方式识别租户 OnDisconnected 吗?
谢谢!
最佳答案
对于任何感兴趣的人,我最终会注入(inject)一个上下文工厂而不是上下文本身:
public class UserTrackingHub : Hub
{
private readonly Func<string, UserContext> _contextFactory;
public UserTrackingHub(Func<string, UserContext> contextFactory) { ... }
public override async Task OnConnected() { ... }
public override async Task OnDisconnected(bool stopCalled)
{
var tenant = Context.Request.Cookies["app.tenant"].Value;
using (var context = _contextFactory.Invoke(tenant))
{
var connection = await context.Connections.FindAsync(Context.ConnectionId);
if (connection != null)
{
context.Connections.Remove(connection);
await context.SaveChangesAsync();
}
}
}
}
以及 Autofac 的配置:
// Resolve context based on tenant
builder.Register<Func<string, UserContext>>(c => new Func<string, UserContext>(tenant => UserContextResolver.Resolve(tenant)));
关于c# - SignalR - Multi-Tenancy 依赖注入(inject),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31527034/