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Aop含义:aspect-oriented programming
Autofac是一个比较流行的Ioc组件,DynamicProxy2是 the Castle Project core的一部分,提供了一个拦截框架
1.先打开vs新建一个web项目,打开nuget执行安装命令如下图所示
2.配置autofac
在Global.asax文件中在添加如下代码
public class Global : HttpApplication, IContainerProviderAccessor { static IContainerProvider _containerProvider; // Instance property that will be used by Autofac HttpModules // to resolve and inject dependencies. public IContainerProvider ContainerProvider { get { return _containerProvider; } } }
在Application_Start方法中配置
void Application_Start(object sender, EventArgs e) { // 在应用程序启动时运行的代码 RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); // Build up your application container and register your dependencies. var builder = new ContainerBuilder(); // Once you‘re done registering things, set the container // provider up with your registrations. builder.RegisterAssemblyTypes(Assembly.GetExecutingAssembly()); builder.RegisterType<Calculator>().EnableClassInterceptors().InterceptedBy(typeof(CallLogger)).As<ICalculator>(); builder.RegisterType<CallLogger>(); var container = builder.Build(); _containerProvider = new ContainerProvider(container); }
3.aop示例代码如下包含一个接口,一个实现类和一个拦截类
public interface ICalculator { int Add(int lhs, int rhs); int Multiply(int lhs, int rhs); } [Intercept(typeof(CallLogger))] public class Calculator : ICalculator { public virtual int Add(int lhs, int rhs) { return lhs + rhs; } public virtual int Multiply(int lhs, int rhs) { return lhs * rhs; } } public class CallLogger : IInterceptor { TextWriter _output = HttpContext.Current.Response.Output; //public CallLogger(TextWriter output) //{ // _output = output; //} public void Intercept(IInvocation invocation) { _output.Write("Calling method {0} with parameters {1}... ", invocation.Method.Name, string.Join(", ", invocation.Arguments.Select(a => (a ?? "").ToString()).ToArray())); invocation.Proceed(); _output.WriteLine("Done: result was {0}.", invocation.ReturnValue); } }
global文件中的代码已经写完,其引用应该包括如下几个
using Autofac;
using Autofac.Extras.DynamicProxy2;
using Autofac.Integration.Web;
using Castle.Core;
using Castle.DynamicProxy;
4.效果展现,在Page页添加如下代码,然后运行浏览。
public partial class _Default : Page { //public ICalculator handler { get; set; } protected void Page_Load(object sender, EventArgs e) { var cpa = (IContainerProviderAccessor)HttpContext.Current.ApplicationInstance; var cp = cpa.ContainerProvider; var handler = cp.RequestLifetime.Resolve<ICalculator>(); var test = handler.Add(1, 33); Response.Write(test.ToString()); } }
训练结束,
参考文档http://docs.autofac.org/en/v3.5.2/advanced/interceptors.html#enabling-interception
Autofac和DynamicProxy2搭配实现Aop动手训练
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原文地址:http://www.cnblogs.com/zhengwl/p/5433181.html