CasCap.Common.Hosting.AspNetCore 4.15.0

Prefix Reserved
.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 
dotnet add package CasCap.Common.Hosting.AspNetCore --version 4.15.0
                    


                    

                
NuGet\Install-Package CasCap.Common.Hosting.AspNetCore -Version 4.15.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="CasCap.Common.Hosting.AspNetCore" Version="4.15.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="CasCap.Common.Hosting.AspNetCore" Version="4.15.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="CasCap.Common.Hosting.AspNetCore" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add CasCap.Common.Hosting.AspNetCore --version 4.15.0
                    


                    

                
#r "nuget: CasCap.Common.Hosting.AspNetCore, 4.15.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package CasCap.Common.Hosting.AspNetCore@4.15.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=CasCap.Common.Hosting.AspNetCore&version=4.15.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=CasCap.Common.Hosting.AspNetCore&version=4.15.0
                    


                            Install as a Cake Tool

CasCap.Common.Hosting.AspNetCore

ASP.NET Core hosting defaults for feature-gated controllers, Serilog logging, and OpenTelemetry metrics, traces, and logs.

Installation

dotnet add package CasCap.Common.Hosting.AspNetCore

Feature-Gated Controllers

In a modular monolith the whole controller surface compiles into one process, but each deployment (pod/host) typically enables only a subset of features (see CasCap.Common.Services / FeatureFlagConfig.EnabledFeatures) and registers only that subset's services. Without gating, every controllers-enabled host maps every controller and returns HTTP 500 when a controller's feature-scoped dependency is not registered — and advertises endpoints in Swagger it cannot actually serve.

Mark a controller with [FeatureController(...)] and call AddFeatureGatedControllers(enabledFeatures) so the controller is only routed (and shown in OpenAPI/Swagger) on hosts where one of its features is enabled. Unmarked controllers are always available (their dependencies must be registered on every host that maps controllers).

This is the single-assembly (type-level) equivalent of gating controllers by ApplicationPart at the assembly level. Prefer assembly-level gating (AddApplicationPart per enabled feature) when each feature's controllers live in their own assembly, since that also avoids loading off-feature assemblies.

Target frameworks: net8.0, net9.0, net10.0

Usage

// Controller — only mapped where the PafGen feature is enabled:
[ApiController]
[FeatureController(FeatureNames.PafGen)]
[Route("api/v{version:apiVersion}/paf/srzone")]
public sealed class SrZoneController(IPafPlotCollectionSource source) : ControllerBase { /* ... */ }

// Composition root:
builder.Services.AddControllers()
    .AddFeatureGatedControllers(enabledFeatures); // same set passed to AddFeatureFlagService(...)

Types

Type Description
FeatureControllerAttribute Marks a controller with the feature name(s) that must be enabled for it to be discovered. Unmarked = always available
FeatureGatedControllerFeatureProvider IApplicationFeatureProvider<ControllerFeature> that prunes marked controllers whose feature is not enabled on the host

Extensions

Extension Description
MvcBuilderExtensions.AddFeatureGatedControllers() Adds the FeatureGatedControllerFeatureProvider to the MVC application-part manager for the supplied enabled-feature set

Serilog

GetBootstrapLogger provides early startup logging, while InitializeSerilog configures Serilog as the host logging pipeline. Serilog owns the pipeline through UseSerilog(..., writeToProviders: true) so one Serilog configuration section controls the console and forwards events to Microsoft.Extensions.Logging providers, including OpenTelemetry.

Extension Description
SerilogExtensions.GetBootstrapLogger() Creates a bootstrap console logger and wires ApplicationLogging.LoggerFactory
SerilogWebApplicationBuilderExtensions.InitializeSerilog(builder, categoryName) Configures Serilog as the host pipeline and forwards events to registered logging providers
LoggerConfiguration.AddCasCapDefaults(IConfiguration) Applies standard enrichers, console output, health-check filtering, and configuration binding

SerilogExtensions.ConsoleLevelSwitch controls console verbosity independently from other sinks. It defaults to Verbose; interactive applications can temporarily raise it to Warning to prevent rendered output from interleaving with logs.

OpenTelemetry

InitializeOpenTelemetry registers metrics, traces, and logs with OTLP gRPC export. It uses IMetricsConfig for the service name, metric prefix, and exporter endpoint.

Extension Description
OpenTelemetryExtensions.InitializeOpenTelemetry(...) Registers OpenTelemetry metrics, traces, and logs with OTLP gRPC export
MeterProviderBuilderExtensions.AddHistogramView(...) Registers explicit histogram bucket boundaries for a prefixed instrument
MetricBoundaries.Symmetric(...) Mirrors positive boundaries into a signed set around zero

Registration is skipped when IMetricsConfig.OtlpExporterEndpoint is null. Development hosts expose the Prometheus exporter; non-development hosts add ASP.NET Core, runtime, process, HTTP client, and optional Redis instrumentation.

Configuration Examples

Minimal configuration disables telemetry:

{
    "AppConfig": {
        "MetricNamePrefix": "app",
        "OtelServiceName": "Example.App"
    }
}

Configured OTLP export:

{
    "AppConfig": {
        "MetricNamePrefix": "app",
        "OtelServiceName": "Example.App",
        "OtlpExporterEndpoint": "http://otel-collector.example.com:4317"
    }
}

Dependencies

Framework References

Reference Purpose
Microsoft.AspNetCore.App ASP.NET Core MVC application-part / controller-feature types (IApplicationFeatureProvider<ControllerFeature>, IMvcBuilder)

Project References

Project Purpose
CasCap.Common.Abstractions Host and metrics configuration contracts
CasCap.Common.Logging Shared ApplicationLogging logger factory
CasCap.Common.Net Basic-auth header creation for authenticated OTLP exporters
CasCap.Common.Services Git build metadata for telemetry resource attributes

NuGet Packages

The package includes the Serilog ASP.NET Core pipeline, standard Serilog enrichers and console sink, OpenTelemetry hosting/export packages, ASP.NET Core, HTTP, process, runtime, and Redis instrumentation, and StackExchange.Redis integration.

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
4.15.0 62 10/6/2026

See https://github.com/f2calv/CasCap.Common/releases