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PiBox.Hosting.Generator

PiBox framework

PiBox.Hosting.Generator is a dotnet source generator package that allows dotnet dev's to use the pibox web host to discover available pibox plugins.

Installation

To install the nuget package follow these steps:

dotnet add package PiBox.Hosting.Generator # this is required so the web host can discover & load the plugins
dotnet add package PiBox.Hosting.WebHost

or add as package reference to your .csproj

<PackageReference Include="PiBox.Hosting.Generator" Version="" />
<PackageReference Include="PiBox.Hosting.WebHost" Version="" />

Concept

The source generator will scan all assemblies which are referenced by the PiBox.Hosting.Webhost project and add any classes or interfaces which are implementing

  • the interface IPluginActivateable
  • any class attribute which starts with the name PiBox

to generate a class like the following example

using System;
using System.Diagnostics.CodeAnalysis;
using System.CodeDom.Compiler;
namespace PiBox.Generated;

[ExcludeFromCodeCoverage]
[GeneratedCode("PiBox.Hosting.Generator", "0.5.0.0")]
public class PiBoxPluginTypes {
 public static Type[] All = new Type[] {
  typeof(PiBox.Hosting.WebHost.Sample.HangfireTestJob),
  typeof(PiBox.Hosting.WebHost.Sample.WebHostSamplePlugin),
  typeof(PiBox.Hosting.WebHost.Sample.NpgsqlDbConfiguration),
  typeof(PiBox.Api.OpenApi.OpenApiConfiguration),
  typeof(PiBox.Api.OpenApi.OpenApiPlugin),
  typeof(PiBox.Plugins.Authorization.Keycloak.KeycloakPlugin),
  typeof(PiBox.Plugins.Authorization.Keycloak.KeycloakPluginConfiguration),
  typeof(PiBox.Plugins.Endpoints.RestResourceEntity.RestResourceEntityPlugin),
  typeof(PiBox.Plugins.Jobs.Hangfire.HangfireConfiguration),
  typeof(PiBox.Plugins.Jobs.Hangfire.HangFirePlugin),
  typeof(PiBox.Plugins.Persistence.EntityFramework.EntityFrameworkPlugin),
  typeof(PiBox.Hosting.Abstractions.Middlewares.ExceptionMiddleware),
  typeof(PiBox.Hosting.Abstractions.Middlewares.RequestContentLengthLimitMiddleware),
  typeof(PiBox.Plugins.Handlers.Cqrs.SimpleResource.CqrsSimpleResourcePlugin),
 };
}

This class then gets referenced by the webhost's Program.cs e.g.

If you don't include the generator package, you must specify the allowed plugin types manually!

using PiBox.Hosting.WebHost;
PluginWebHostBuilder.RunDefault(PiBox.Generated.PiBoxPluginTypes.All);

The webhost's service-, host- and application-configurators then access this list of types to activate and load all the found plugins on startup.

Excludes

The following namespaces will be ignored when the source generator goes through all the assemblies at build time:

  • Microsoft
  • System
  • FastEndpoints
  • testhost
  • netstandard
  • Newtonsoft
  • mscorlib
  • NuGet
  • NSwag
  • FluentValidation
  • YamlDotNet
  • Accessibility
  • NJsonSchema
  • Namotion"

Changes to this list may happen in the future based on new requirements.