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[英]How do you configure registration lifetimes/settings using types in Autofac?
[英]How to correctly configure InstancePerTenant using Autofac?
我一直在尝试使用InstancePerTenant
为每个租户设置我的组件实例。 然而, InstancePerTenant
不知何故表现得像一个SingleInstance
。 我的设置有问题吗?
我有这个配置多租户相关依赖项的 ContainerBuilder 扩展。
public static ContainerBuilder AddMultitenancy(this ContainerBuilder builder)
{
builder.RegisterType<HttpContextAccessor>().As<IHttpContextAccessor>().SingleInstance();
builder.RegisterType<TenantStore>().As<ITenantStore>().SingleInstance();
builder.RegisterType<TenantResolverStrategy>().As<ITenantIdentificationStrategy>().SingleInstance();
return builder
}
租户由主机名标识:
public class TenantResolverStrategy : ITenantIdentificationStrategy
{
private readonly IHttpContextAccessor httpContextAccessor;
public TenantResolverStrategy(
IHttpContextAccessor httpContextAccessor
)
{
this.httpContextAccessor = httpContextAccessor;
}
public bool TryIdentifyTenant(out object tenantId)
{
// hostname is the tenantId
tenantId = httpContextAccessor.HttpContext?.Request?.Host.Value;
return (tenantId != null || tenantId == (object)"");
}
}
TenantStore 只是一个 class 用于根据tenantId(主机名)从数据库中解析租户实体
public class TenantStore : ITenantStore
{
private readonly ITenantIdentificationStrategy tenantIdentificationStrategy;
private readonly MemoryCacheStore cacheStore;
private readonly ITenantService tenantService;
public TenantStore(
ITenantIdentificationStrategy tenantIdentificationStrategy,
MemoryCacheStore cacheStore,
ITenantService tenantService
)
{
this.tenantIdentificationStrategy = tenantIdentificationStrategy;
this.cacheStore = cacheStore;
this.tenantService = tenantService;
}
public async Task<TenantEntity> GetTenantAsync(object tenantId)
{
var hostName = (string)tenantId;
var tenant = cacheStore.Get<TenantEntity>(CacheType.Tenant, hostName);
if (tenant == null)
{
tenant = await tenantService.GetTenantByHostNameFromDatabaseAsync(hostName);
cacheStore.Set(tenant, CacheType.Tenant, hostName);
}
return tenant ?? new TenantEntity();
}
}
在 Startup.cs 中,我正在使用InstancePerTenant
注册TenantSpecific
:
public void ConfigureContainer(ContainerBuilder builder)
{
builder.AddMultitenancy();
builder.RegisterType<TenantSpecific>().As<ITenantSpecific>().InstancePerTenant();
}
public static MultitenantContainer ConfigureMultitenantContainer(IContainer container
{
var strategy = container.Resolve<ITenantIdentificationStrategy>();
var multitenantContainer = new MultitenantContainer(strategy, container);
// Nothing important here
multitenantContainer.RegisterMultitenantSpecificStuff();
return multitenantContainer;
}
TenantSpecific.cs 和 TenantSpecificController.cs:
public class TenantSpecific
{
public Guid Id { get; set; }
public TenantSpecific()
{
this.Id = Guid.NewGuid();
}
}
public class TenantSpecificController : ApiController
{
private readonly ITenantSpecific tenantSpecific;
public TenantSpecificController(ITenantSpecific tenantSpecific)
{
this.tenantSpecific = tenantSpecific;
}
[HttpGet]
public IActionResult Get()
{
return Ok(tenantSpecific.Id);
}
}
在 Program.cs 中
public static IHostBuilder CreateHostBuilder(string[] args)
{
var host = Host.CreateDefaultBuilder(args)
.UseServiceProviderFactory(new AutofacMultitenantServiceProviderFactory(Startup.ConfigureMultitenantContainer))
.ConfigureWebHostDefaults(webHostBuilder =>
{
webHostBuilder
.UseConfiguration(ConfigurationModule.GetConfiguration())
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
.UseIISIntegration()
.UseStartup<Startup>();
});
return host;
}
当我调用http://tenant1.localhost/tenant-specific/和http://tenant2.localhost/tenant-specific时, TenantSpecific
的构造函数只被调用一次,如 Z6FF5F73C8B5EBD3101406568C8。 tenantSpecific.Id
返回相同的值。 所以我假设InstancePerTenant
在这里不起作用。
我的设置有问题吗?
如文档ASP.net 核心多租户支持中所写
您应该添加对AddAutofacMultitenantRequestServices()
的调用,以将所需的中间件添加到多租户工作所需的根容器中。
public void ConfigureServices(IServiceCollection services)
{
// This will all go in the ROOT CONTAINER and is NOT TENANT SPECIFIC.
services.AddMvc();
services.AddControllers();
// This adds the required middleware to the ROOT CONTAINER and
// is required for multitenancy to work.
services.AddAutofacMultitenantRequestServices();
}
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