容器的配置

1、配置文件

  通过配置文件可以配置多个容器，通过更换 default 的值即可实现无缝切换。配置文件如下：

• .Net Framework 下的 app.config 或 web.config 文件

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <sectionGroup name="fireasy">
      <section name="containers" type="Fireasy.Common.Ioc.Configuration.ContainerConfigurationSectionHandler, Fireasy.Common"/>
    </sectionGroup>
  </configSections>
  <fireasy>
    <containers>
      <container>
        <registration
           serviceType="demo.IMyOneService, demo"
           implementationType="demo.MyOneService, demo"
           lifetime="Singleton" />
        </registration>
        <registration
           serviceType="demo.IMyTwoService, demo"
           implementationType="demo.MyTwoService, demo",
           lifetime="Transient"/>
        </registration>
        <registration
           serviceType="demo.MyThirdService, demo" />
        </registration>
        <registration
           assembly="demo" />
        </registration>
      </container>
    </containers>
  </fireasy>
</configuration>

• .Net Core 下的 appsettings.json 文件

{
  "fireasy": {
    "containers": {
      "settings": {
        "default": [
          {
            "serviceType": "demo.IMyOneService, demo",
            "implementationType": "demo.MyOneService, demo",
            "lifetime": "Singleton" // Singleton / Transient / Scoped
          },
          {
            "serviceType": "demo.IMyTwoService, demo",
            "implementationType": "demo.MyTwoService, demo",
            "lifetime": "Transient"
          },
          {
            "serviceType": "demo.MyThirdService, demo"
          },
          {
            "assembly": "demo"
          }
        ]
      }
    }
  }
}

  配置节中，分别指定 serviceType（服务类/接口） 和 implementationType（实现类，当实现类和服务类是同一个时，可省略，如 MyThirdService）。使用 assembly 可以注册整个程序集，规则见 容器的使用 -- 注册程序集。

2、.Net Core 下的配置

  在 .Net Core 应用中，在 Startup.ConfigureServices 方法里，使用 AddIoc 方法将 Fireasy 的配置添加到 IServiceCollection 集合中。如下所示：

namespace demo
{
    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 void ConfigureServices(IServiceCollection services)
        {
            services.AddFireasy(Configuration).AddIoc();
        }
    }
}

  应用启动后，会在 输出 窗口打印出服务的注册结果。如下所示：

-->> Singleton-Descriptor has been registered: demo.IMyOneService --> demo.MyOneService.
-->> Transient-Descriptor has been registered: demo.IMyTwoService --> demo.MyTwoService.
-->> Transient-Descriptor has been registered: demo.MyThirdService --> demo.MyThirdService.