RSCG – ServiceScan.SourceGenerator
RSCG – ServiceScan.SourceGenerator
| name | ServiceScan.SourceGenerator |
| nuget | https://www.nuget.org/packages/ServiceScan.SourceGenerator/ |
| link | https://github.com/Dreamescaper/ServiceScan.SourceGenerator |
| author | Oleksandr Liakhevych |
Generating service collection / DI registration
This is how you can use ServiceScan.SourceGenerator .
The code that you start with is
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<PropertyGroup>
<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="ServiceScan.SourceGenerator" Version="1.1.2">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageReference>
<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
</ItemGroup>
</Project>
The code that you will use is
using InjectDemo;
using Microsoft.Extensions.DependencyInjection;
var sc=new ServiceCollection();
sc.AddMyServices();
var sp=sc.BuildServiceProvider();
var con = sp.GetService(typeof(Database)) as IDatabase;
ArgumentNullException.ThrowIfNull(con);
con.Open();
public static partial class MyServiceProvider
{
[ServiceScan.SourceGenerator.GenerateServiceRegistrations(AssignableTo = typeof(Database),AsSelf =true, Lifetime = ServiceLifetime.Scoped)]
[ServiceScan.SourceGenerator.GenerateServiceRegistrations(AssignableTo = typeof(IDatabase), Lifetime = ServiceLifetime.Scoped)]
public static partial IServiceCollection AddMyServices(this IServiceCollection services)
;
}
namespace InjectDemo;
partial class Database : IDatabase
{
private readonly IDatabase con;
public Database(IDatabase con)
{
this.con = con;
}
public void Open()
{
Console.WriteLine($"open from database");
con.Open();
}
}
namespace InjectDemo;
public partial class DatabaseCon:IDatabase
{
public string? Connection { get; set; }
public void Open()
{
Console.WriteLine("open from database con" );
}
}
The code that is generated is
#nullable enable
using System;
using System.Diagnostics;
using Microsoft.Extensions.DependencyInjection;
namespace ServiceScan.SourceGenerator;
[Conditional("CODE_ANALYSIS")]
[AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
internal class GenerateServiceRegistrationsAttribute : Attribute
{
/// <summary>
/// Set the assembly containing the given type as the source of types to register.
/// If not specified, the assembly containing the method with this attribute will be used.
/// </summary>
public Type? FromAssemblyOf { get; set; }
/// <summary>
/// Set the type that the registered types must be assignable to.
/// Types will be registered with this type as the service type,
/// unless <see cref="AsImplementedInterfaces"/> or <see cref="AsSelf"/> is set.
/// </summary>
public Type? AssignableTo { get; set; }
/// <summary>
/// Set the lifetime of the registered services.
/// <see cref="ServiceLifetime.Transient"/> is used if not specified.
/// </summary>
public ServiceLifetime Lifetime { get; set; }
/// <summary>
/// If set to true, types will be registered as implemented interfaces instead of their actual type.
/// </summary>
public bool AsImplementedInterfaces { get; set; }
/// <summary>
/// If set to true, types will be registered with their actual type.
/// It can be combined with <see cref="AsImplementedInterfaces"/>, in that case implemeted interfaces will be
/// "forwarded" to "self" implementation.
/// </summary>
public bool AsSelf { get; set; }
/// <summary>
/// Set this value to filter the types to register by their full name.
/// You can use '*' wildcards.
/// You can also use ',' to separate multiple filters.
/// </summary>
/// <example>Namespace.With.Services.*</example>
/// <example>*Service,*Factory</example>
public string? TypeNameFilter { get; set; }
}
using Microsoft.Extensions.DependencyInjection;
public static partial class MyServiceProvider
{
public static partial IServiceCollection AddMyServices(this IServiceCollection services)
{
return services
.AddScoped<InjectDemo.Database, InjectDemo.Database>()
.AddScoped<InjectDemo.IDatabase, InjectDemo.Database>()
.AddScoped<InjectDemo.IDatabase, InjectDemo.DatabaseCon>();
}
}
Code and pdf at
https://ignatandrei.github.io/RSCG_Examples/v2/docs/ServiceScan.SourceGenerator