(精华)2020年8月17日 微服务 WebApi注入unity容器实现面向切面

控制器中使用

public class IOCController : ApiController
{
    private IUserService _UserService = null;
    public IOCController(IUserService userService)
    {
        this._UserService = userService;
    }

    public string Get(int id)
    {
        //IUserService service = new UserService();
        //IUserService service = ContainerFactory.BuildContainer().Resolve<IUserService>();
        return Newtonsoft.Json.JsonConvert.SerializeObject(this._UserService.Query(id));
    }
}

DI注入相关类

public class UnityDependencyResolver : IDependencyResolver
{
    private IUnityContainer _UnityContainer = null;
    public UnityDependencyResolver(IUnityContainer container)
    {
        _UnityContainer = container;
    }

    public IDependencyScope BeginScope()//Scope
    {
        return new UnityDependencyResolver(this._UnityContainer.CreateChildContainer());
    }

    public void Dispose()
    {
        this._UnityContainer.Dispose();
    }

    public object GetService(Type serviceType)
    {
        try
        {
            return ContainerFactory.BuildContainer().Resolve(serviceType);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            return null;
        }
    }

    public IEnumerable<object> GetServices(Type serviceType)
    {
        try
        {
            return ContainerFactory.BuildContainer().ResolveAll(serviceType);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            return null;
        }
    }
}

/// <summary>
/// 需要在nuget引用之后，单独引用Unity.Configuration
/// 如果有AOP扩展，还需要引用Unity.Interception.Configuration
/// 因为我们是用配置文件来做的配置
/// </summary>
public class ContainerFactory
{
    public static IUnityContainer BuildContainer()
    {
        //get
        //{
        return _Container;
        //}
    }

    private static IUnityContainer _Container = null;
    static ContainerFactory()
    {
        ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
        fileMap.ExeConfigFilename = Path.Combine(AppDomain.CurrentDomain.BaseDirectory + "CfgFiles\\Unity.Config");//找配置文件的路径
        Configuration configuration = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
        UnityConfigurationSection section = (UnityConfigurationSection)configuration.GetSection(UnityConfigurationSection.SectionName);
        _Container = new UnityContainer();
        section.Configure(_Container, "WebApiContainer");
    }
}

<configuration>
  <configSections>
    <section name="unity" type="Microsoft.Practices.Unity.Configuration.UnityConfigurationSection, Unity.Configuration"/>
  </configSections>
  <unity>
    <sectionExtension type="Microsoft.Practices.Unity.InterceptionExtension.Configuration.InterceptionConfigurationExtension, Unity.Interception.Configuration"/>
    <containers>
      <container name="WebApiContainer">
        <extension type="Interception"/>
        <register type="Ruanmou.SOA.Interface.IUserService,Ruanmou.SOA.Interface" mapTo="Ruanmou.SOA.Service.UserService, Ruanmou.SOA.Service">
          <!--
          <interceptor type="InterfaceInterceptor"/>
          <interceptionBehavior type="Ruanmou.Framework.AOP.LogBeforeBehavior, Ruanmou.Framework"/>
          <interceptionBehavior type="Ruanmou.Framework.AOP.LogAfterBehavior, Ruanmou.Framework"/>
          <interceptionBehavior type="Ruanmou.Framework.AOP.ParameterCheckBehavior, Ruanmou.Framework"/>
          <lifetime type="transient" />-->
        </register>
      </container>
    </containers>
  </unity>
</configuration>

路由注入

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API 配置和服务
        config.DependencyResolver = new UnityDependencyResolver(ContainerFactory.BuildContainer());

        // Web API 路由
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",//默认的api路由
            routeTemplate: "api/{controller}/{id}",//正则规则，以api开头，第二个是控制器  第三个是参数
            defaults: new { id = RouteParameter.Optional }
        );

        //   config.Routes.MapHttpRoute(
        //    name: "CustomApi",//默认的api路由
        //    routeTemplate: "api/{controller}/{action}/{id}",//正则规则，以api开头，第二个是控制器  第三个是参数
        //    defaults: new { id = RouteParameter.Optional }
        //);
    }
}