.netcore 中使用开源的AOP框架 AspectCore

AspectCore Project 介绍

什么是AspectCore Project ?

AspectCore Project 是适用于Asp.Net Core 平台的轻量级 Aop(Aspect-oriented programming) 解决方案,它更好的遵循Asp.Net Core的模块化开发理念,使用AspectCore可以更容易构建低耦合、易扩展的Web应用程序。

为什么要设计AspectCore ?

在传统.Net Framework和Asp.Net Framework中,我们使用Castle DynamicProxy 或者CLR提供的 Remoting.Proxies 可以轻松的实现 Aop 来分离关注点从而降低业务逻辑和基础框架功能的耦合。然而在Asp.Net Core中,不仅缺乏细粒度的Aop支持(MiddlewareFilter都是Asp.Net Core的内置Aop实现,但仅适合在Web层使用),Castle也迟迟未能友好的支持Asp.Net Core。

因此 AspectCore 提供了一个全新的轻量级和模块化的Aop解决方案,下面是AspectCore的基本特性:

 上面是一些概念介绍,关于AOP指的是面向切面编辑,其时我们之前用过,只是没注意而已,比如.netcore中的services中的方法,注入到服务中,权限过滤等都可以理解为AOP.

 下面使用aspectcore写一个注入的例子,可以应用到验证权限中。

using AspectCore.DynamicProxy;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace AspectCore
{
    public class CustomInterceptorAttribute: AbstractInterceptorAttribute
    {
        public async override Task Invoke(AspectContext context, AspectDelegate next)
        {
            try
            {
                Console.WriteLine("Before service call");
                await next(context);
            }
            catch (Exception)
            {
                Console.WriteLine("Service threw an exception!");
                throw;
            }
            finally
            {
                Console.WriteLine("After service call");
            }
        }

    }
}
using AspectCore.DynamicProxy;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace AspectCore.Services
{

    public interface ICustomService
    {
        [CustomInterceptor]
        void Call();
    }
    public class CustomService : ICustomService
    {
        public void Call()
        {
            Console.WriteLine("service calling...");
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AspectCore.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace AspectCore.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class HomeController : ControllerBase
    {
      
        private readonly ICustomService _service;
        public HomeController(ICustomService service)
        {
            _service = service;
        }

       [HttpGet("getmsg")]
        public  void GetMsg()
        {
           
            _service.Call();
        }

    }
}
using System;
using AspectCore.Configuration;
using AspectCore.Extensions.DependencyInjection;
using AspectCore.Injector;
using AspectCore.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;


namespace AspectCore
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public IServiceProvider ConfigureServices(IServiceCollection services)
        {
            //根据属性注入来配置全局拦截器
            services.ConfigureDynamicProxy(config =>
            {
                config.Interceptors.AddTyped<CustomInterceptorAttribute>();//CustomInterceptorAttribute这个是需要全局拦截的拦截器
            });

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); ;

             services.AddSingleton<ICustomService, CustomService>();

            var serviceContainer = services.ToServiceContainer();//容器
            return serviceContainer.Build();

        }
           public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseMvc();
        }
    }
}

 

.netcore 中使用开源的AOP框架 AspectCore

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