AspCoreAOP

A plugin for Microsoft.Extensions.DependencyInjection to support automatically injecting all types which defines ITransientType, IScopedType, ISingletonType, and also injecting makes with interceptors. It uses System.Reflection.DispatchProxy to enable on the fly proxy creation of implementation types.

How to Use

• Add DependencyInjection package to your project.

 PM> Install-Package AspCoreAOP.Core

• Create your custom interceptors in your project.

public class BeforeAspect : InterceptorBase, IBeforeInterceptor
{
     public BeforeAspect()
     {}
     public BeforeAspect(InterceptorContext context) : base(context)
     {}
     public void OnBefore()
     {
         InputDTO input = this._context.invocation.args[0] as InputDTO;
         if (input != null)
         {
             input.str = $"Before Aspect Work before method" + input.str;
         }
     }
}

public class AfterAspect : InterceptorBase, IAfterInterceptor
{
     public AfterAspect()
     {}
     public AfterAspect(InterceptorContext context) : base(context)
     {}
     public void OnAfter()
     {
         ((OutputDTO)this._context.invocation.result).str += " \n Aspect work after method";
     }
}

public class ExceptionAspect : InterceptorBase, IExceptionInterceptor
{
     public ExceptionAspect()
     {}
     public ExceptionAspect(InterceptorContext context) : base(context)
     {}
     public void OnException(Exception exception)
     {
         this._context.invocation.result = new OutputDTO
         {
             str = exception.InnerException.Message
         };
     }
}
    

• Service types or implementation types can use attribute for interceptor

   [BeforeAspect(priority = 1)]
   [BeforeAspect1(priority = 2)]
   public interface IServiceA : IService, ISingletonType
   {}
   
   [AfterAspect]
   public interface IServiceB : IService, IScopedType
   {}
   
   [ExceptionAspect]
   public interface IServiceC : IService, ITransientType
   {}
          or
          
   [ExceptionAspect]
   public class ManagerC : BaseManager, IServiceC
   ...
   

• Ensure fire the AutoBindWithInterceptors method in Startup.cs

//ProxySelector used AttributeBaseProxySelector as default.

   services.AutoBindWithInterceptors();

//ProxySelector used with custom class.

 services.AutoBindWithInterceptors<TProxyGenerator>();

//Two method used with namespace constraint.

services.AutoBindWithInterceptors(option =>
{
  option.namespaceStr = "AspCoreDependency.Test.Concrete.NameSpace1";
});

Test Project

You can see all usage in AspCoreAOP.Test.csproj project.