AspectCore和MSDI 实现Name注册以及解析对象

AspectCore 在注册服务这块比较简单，默认是无法根据Name去注册和解析对象，这边做一下这块的扩展

大致原理是根据自定义Name去生成对应的动态类型，然后使用委托或者对象的方式，进行注册

tips:由于底层原理的原因，无法支持Type的方式进行注册

定义好动态类型的接口，以及相关实现

 1 public interface INamedService : IDisposable
 2 {
 3     object Service { get; }
 4 }
 5 
 6 public interface INamedService : INamedService
 7     where T : class
 8 {
 9     new T Service { get; }
10 }
11 
12 public interface INamedService : INamedService
13     where TService : class
14     where TNamed : struct
15 {
16 }
17 
18 internal class NamedService : INamedService
19     where TService : class
20     where TNamed : struct
21 {
22     ~NamedService()
23     {
24         Dispose(false);
25     }
26 
27     public NamedService(TService service)
28     {
29         Service = service;
30     }
31 
32     public TService Service { get; private set; }
33 
34     object INamedService.Service => Service;
35 
36     public void Dispose()
37     {
38         Dispose(true);
39         GC.SuppressFinalize(this);
40     }
41 
42     private void Dispose(bool disposing)
43     {
44         if (!disposing)
45         {
46             return;
47         }
48 
49         if (Service == null)
50         {
51             return;
52         }
53 
54         if (Service is IDisposable disposable)
55         {
56             disposable.Dispose();
57             Service = null;
58         }
59     }
60 }

根据自定义Name和ServiceType生成对应的动态类型

 1 public static class NamedBuilder
 2 {
 3     private const string KeyPrefix = "Ksd.NamedType.";
 4     private static readonly ModuleBuilder _moduleBuilder = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName("Ksd.DynamicAssembly.NamedType"), AssemblyBuilderAccess.Run).DefineDynamicModule("NamedTypeModule");
 5     private static readonly ConcurrentDictionary _namedTypes = new(StringComparer.OrdinalIgnoreCase);
 6 
 7     private static Type GetNamedType(string name)
 8     {
 9         if (name.IsNull())
10         {
11             throw new ArgumentNullException(nameof(name));
12         }
13 
14         name = KeyPrefix + name;
15 
16         return _namedTypes.GetOrAdd(name, k =>
17         {
18             var tb = _moduleBuilder.DefineType(k, TypeAttributes.Public | TypeAttributes.Sealed, typeof(ValueType));
19             var type = tb.CreateTypeInfo().AsType();
20             return type;
21         });
22     }
23 
24     public static Type CreateServiceType(string name, Type serviceType)
25     {
26         var namedType = GetNamedType(name);
27         return typeof(NamedService<,>).MakeGenericType(serviceType, namedType);
28     }
29 
30     public static Type CreateServiceBaseType(string name, Type serviceType)
31     {
32         var namedType = GetNamedType(name);
33         return typeof(INamedService<,>).MakeGenericType(serviceType, namedType);
34     }
35 
36     public static Type GetNameServiceBaseType(Type namedType)
37     {
38         return namedType.GetInterfaces()[0];
39     }
40 }

封装根据自定义的Name注册和解析的相关方法

  1 public static class NamedServiceExtensions
  2 {
  3     #region AddInstance
  4     public static IServiceContext AddInstance(this IServiceContext services, Type serviceType, object implementationInstance, string name)
  5     {
  6         if (name.IsNull())
  7         {
  8             return services.AddInstance(serviceType, implementationInstance);
  9         }
 10 
 11         if (services == null)
 12         {
 13             throw new ArgumentNullException(nameof(services));
 14         }
 15 
 16         if (serviceType == null)
 17         {
 18             throw new ArgumentNullException(nameof(serviceType));
 19         }
 20 
 21         if (implementationInstance == null)
 22         {
 23             throw new ArgumentNullException(nameof(implementationInstance));
 24         }
 25 
 26         var namedType = NamedBuilder.CreateServiceType(name, serviceType);
 27         services.AddInstance(NamedBuilder.GetNameServiceBaseType(namedType), Activator.CreateInstance(namedType, implementationInstance));
 28         return services;
 29     }
 30 
 31     public static IServiceContext AddInstance(this IServiceContext services, TService implementationInstance, string name)
 32     {
 33         return services.AddInstance(typeof(TService), implementationInstance, name);
 34     }
 35     #endregion
 36 
 37     #region AddDelegate
 38     public static IServiceContext AddDelegate(this IServiceContext services, Type serviceType, Func implementationDelegate, string name, Lifetime lifetime = Lifetime.Transient)
 39     {
 40         if (name.IsNull())
 41         {
 42             return services.AddDelegate(serviceType, implementationDelegate, lifetime);
 43         }
 44 
 45         if (services == null)
 46         {
 47             throw new ArgumentNullException(nameof(services));
 48         }
 49 
 50         if (serviceType == null)
 51         {
 52             throw new ArgumentNullException(nameof(serviceType));
 53         }
 54 
 55         if (implementationDelegate == null)
 56         {
 57             throw new ArgumentNullException(nameof(implementationDelegate));
 58         }
 59 
 60         var namedType = NamedBuilder.CreateServiceType(name, serviceType);
 61         services.AddDelegate(NamedBuilder.GetNameServiceBaseType(namedType), s => Activator.CreateInstance(namedType, implementationDelegate(s)), lifetime);
 62         return services;
 63     }
 64 
 65     public static IServiceContext AddDelegate(this IServiceContext services, Func implementationDelegate, string name, Lifetime lifetime = Lifetime.Transient)
 66         where TService : class
 67     {
 68         return services.AddDelegate(typeof(TService), implementationDelegate, name, lifetime);
 69     }
 70     #endregion
 71 
 72     #region Resolve
 73     public static T Resolve(this IServiceResolver serviceResolver, string name)
 74         where T : class
 75     {
 76         if (name.IsNull())
 77         {
 78             return serviceResolver.Resolve();
 79         }
 80 
 81         var namedType = NamedBuilder.CreateServiceBaseType(name, typeof(T));
 82         var namedService = serviceResolver.Resolve(namedType) as INamedService;
 83         return namedService?.Service;
 84     }
 85 
 86     public static object Resolve(this IServiceResolver serviceResolver, Type serviceType, string name)
 87     {
 88         if (name.IsNull())
 89         {
 90             return serviceResolver.Resolve(serviceType);
 91         }
 92 
 93         var namedType = NamedBuilder.CreateServiceBaseType(name, serviceType);
 94         var namedService = serviceResolver.Resolve(namedType) as INamedService;
 95         return namedService?.Service;
 96     }
 97 
 98     public static IEnumerable ResolveMany(this IServiceResolver serviceResolver, string name)
 99         where T : class
100     {
101         if (name.IsNull())
102         {
103             return serviceResolver.ResolveMany();
104         }
105 
106         var namedType = NamedBuilder.CreateServiceBaseType(name, typeof(T));
107         var namedServices = serviceResolver.ResolveMany(namedType).OfType>();
108         return namedServices.Select(t => t.Service);
109     }
110 
111     public static IEnumerable