我有一个 Service Fabric asp.net 核心无状态服务,它实现了自定义中间件。在那个中间件中,我需要访问我的服务实例。我将如何使用 asp.net core 的内置 DI/IoC 系统注入(inject)它?
public class MyMiddleware
{
private readonly RequestDelegate _next;
public MyMiddleware(RequestDelegate next)
{
_next = next;
}
public Task Invoke(HttpContext httpContext)
{
// ** need access to service instance here **
return _next(httpContext);
}
}
有人在 Apr 20, 2017 Q&A #11 [45:30] 中与 Service Fabric 团队提到在 Web Api 2 中使用 TinyIoC 来完成此操作。同样,当前推荐的方法是使用asp.net core。
任何帮助或示例将不胜感激!
最佳答案
在创建 ServiceInstanceListener
的 asp.net 核心无状态服务中,您可以像这样注入(inject)上下文:
protected override IEnumerable<ServiceInstanceListener> CreateServiceInstanceListeners()
{
return new[]
{
new ServiceInstanceListener(serviceContext =>
new WebListenerCommunicationListener(serviceContext, "ServiceEndpoint", (url, listener) =>
{
logger.LogStatelessServiceStartedListening<WebApi>(url);
return new WebHostBuilder().UseWebListener()
.ConfigureServices(
services => services
.AddSingleton(serviceContext) // HERE IT GOES!
.AddSingleton(logger)
.AddTransient<IServiceRemoting, ServiceRemoting>())
.UseContentRoot(Directory.GetCurrentDirectory())
.UseServiceFabricIntegration(listener, ServiceFabricIntegrationOptions.None)
.UseStartup<Startup>()
.UseUrls(url)
.Build();
}))
};
}
您的中间件可以像这样使用它:
public class MyMiddleware
{
private readonly RequestDelegate _next;
public MyMiddleware(RequestDelegate next)
{
_next = next;
}
public Task Invoke(HttpContext httpContext, StatelessServiceContext serviceContext)
{
// ** need access to service instance here **
return _next(httpContext);
}
}
有关完整示例,请查看此存储库:https://github.com/DeHeerSoftware/Azure-Service-Fabric-Logging-And-Monitoring
您的兴趣点:
关于azure - 如何将 Service Fabric 服务上下文注入(inject) asp.net core 中间件?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/43552441/