jab by Pavel Krymets

Nuget / site data
Details
How to use
- Example ( source csproj, source files )
- Generated Files
Usefull

Nuget / site data

Details

Info

info

Name: jab

Package Description

Author: Pavel Krymets

NuGet: https://www.nuget.org/packages/jab/

You can find more details at https://github.com/pakrym/jab

Source : https://github.com/pakrym/jab

Original Readme

note

Jab Compile Time Dependency Injection

Jab provides a C# Source Generator based dependency injection container implementation.

Fast startup (200x faster than Microsoft.Extensions.DependencyInjection). Details.
Fast resolution (7x faster than Microsoft.Extensions.DependencyInjection). Details.
No runtime dependencies.
AOT and linker friendly, all code is generated during project compilation.
Clean stack traces:
Readable generated code:
Registration validation. Container configuration issues become compiler errors:
Incremental generation, .NET 5/6/7/8 SDK support, .NET Standard 2.0 support, [Unity support](https://github.com/pakrym/jab/README.md#Unity-installation

Example

Add Jab package reference:

<ItemGroup>
    <PackageReference Include="Jab" Version="0.10.2" PrivateAssets="all" />
</ItemGroup>

Define a service and implementation:

internal interface IService
{
    void M();
}

internal class ServiceImplementation : IService
{
    public void M()
    {
    }
}

Define a composition root and register services:

[ServiceProvider]
[Transient(typeof(IService), typeof(ServiceImplementation))]
internal partial class MyServiceProvider { }

Use the service provider:

MyServiceProvider c = new MyServiceProvider();
IService service = c.GetService<IService>();

Features

No runtime dependency, safe to use in libraries
Transient, Singleton, Scoped service registration
Named registrations
Factory registration
Instance registration
IEnumerable resolution
IDisposable and IAsyncDisposable support
IServiceProvider support

The plan is to support the minimum feature set Microsoft.Extensions.DependencyInjection.Abstraction requires but NOT the IServiceCollection-based registration syntax as it is runtime based.

Singleton services

Singleton services are created once per container lifetime in a thread-safe manner and cached. To register a singleton service use the SingletonAttribute:

[ServiceProvider]
[Singleton(typeof(IService), typeof(ServiceImplementation))]
internal partial class MyServiceProvider { }

Singleton Instances

If you want to use an existing object as a service define a property in the container declaration and use the Instance property of the SingletonAttribute to register the service:

[ServiceProvider]
[Singleton(typeof(IService), Instance = nameof(MyServiceInstance))]
internal partial class MyServiceProvider {
    public IService MyServiceInstance { get;set; }
}

Then initialize the property during the container creation:

MyServiceProvider c = new MyServiceProvider();
c.MyServiceInstance = new ServiceImplementation();

IService service = c.GetService<IService>();

Named services

Use the Name property to assign a name to your service registrations and [FromNamedServices("...")] attribute to resolve a service using its name.

[ServiceProvider]
[Singleton(typeof(INotificationService), typeof(EmailNotificationService), Name="email")]
[Singleton(typeof(INotificationService), typeof(SmsNotificationService), Name="sms")]
[Singleton(typeof(Notifier))]
internal partial class MyServiceProvider {}

class Notifier
{
    public Notifier(
        [FromNamedServices("email")] INotificationService email,
        [FromNamedServices("sms")] INotificationService sms)
    {}
}

NOTE: Jab also recognizes the [FromKeyedServices] attribute from Microsoft.Extensions.DependencyInjection.

Factories

Sometimes it's useful to provide a custom way to create a service instance without using the automatic construction selection. To do this define a method in the container declaration and use the Factory property of the SingletonAttribute or TransientAttribute to register the service:

[ServiceProvider]
[Transient(typeof(IService), Factory = nameof(MyServiceFactory))]
internal partial class MyServiceProvider {
    public IService MyServiceFactory() => new ServiceImplementation();
}

MyServiceProvider c = new MyServiceProvider();
IService service = c.GetService<IService>();

When using with TransientAttribute the factory method would be invoked for every service resolution. When used with SingletonAttribute it would only be invoked the first time the service is requested.

Similar to constructors, factories support parameter injection:

[ServiceProvider]
[Transient(typeof(IService), Factory = nameof(MyServiceFactory))]
[Transient(typeof(SomeOtherService))]
internal partial class MyServiceProvider {
    public IService MyServiceFactory(SomeOtherService other) => new ServiceImplementation(other);
}

Scoped Services

Scoped services are created once per service provider scope. To create a scope use the CreateScope() method of the service provider. Service are resolved from the scope using the GetService<IService>() call.

[ServiceProvider]
[Scoped(typeof(IService), typeof(ServiceImplementation))]
internal partial class MyServiceProvider { }

MyServiceProvider c = new MyServiceProvider();
using MyServiceProvider.Scope scope = c.CreateScope();
IService service = scope.GetService<IService>();

When the scope is disposed all IDisposable and IAsyncDisposable services that were resolved from it are disposed as well.

Generic registration attributes

You can use generic attributes to register services if your project targets net7.0 or net6.0 and has LangVersion set to preview.

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFrameworks>net7.0</TargetFrameworks>
  </PropertyGroup>

</Project>

Generic attributes allow declaration to be more compact by avoiding the typeof calls:

[ServiceProvider]
[Scoped<IService, ServiceImplementation>]
[Import<IMyModule>]
internal partial class MyServiceProvider { }

Modules

Often, a set of service registrations would represent a distinct set of functionality that can be included into arbitrary service provider. Modules are used to implement registration sharing. To define a module create an interface and mark it with ServiceProviderModuleAttribute. Service registrations can be listed in module the same way they are in the service provider.

[ServiceProviderModule]
[Singleton(typeof(IService), typeof(ServiceImplementation))]
public interface IMyModule
{
}

To use the module apply the Import attribute to the service provider type:

[ServiceProvider]
[Import(typeof(IMyModule))]
internal partial class MyServiceProvider
{
}

MyServiceProvider c = new MyServiceProvider();
IService service = c.GetService<IEnumerable<IService>>();

Modules can import other modules as well.

NOTE: module service and implementation types have to be accessible from the project where service provider is generated.

Root services

By default, IEnumerable<...> service accessors are only generated when requested by other service constructors. If you would like to have a root IEnumerable<..> accessor generated use the RootService parameter of the ServiceProvider attribute. The generator also scans all the GetService<...> usages and tries to all collected type arguments as the root service.

[ServiceProvider(RootServices = new [] {typeof(IEnumerable<IService>)})]
[Singleton(typeof(IService), typeof(ServiceImplementation))]
[Singleton(typeof(IService), typeof(ServiceImplementation))]
[Singleton(typeof(IService), typeof(ServiceImplementation))]
internal partial class MyServiceProvider
{
}

MyServiceProvider c = new MyServiceProvider();
IService service = c.GetService<IEnumerable<IService>>();

Samples

Console application

Sample Jab usage in console application can be found in [src/samples/ConsoleSample](https://github.com/pakrym/jabsrc/samples/ConsoleSample

Performance

The performance benchmark project is available in [src/Jab.Performance/](https://github.com/pakrym/jabsrc/Jab.Performance/.

Startup time

The startup time benchmark measures time between application startup and the first service being resolved.

| Method |        Mean |     Error |    StdDev |  Ratio | RatioSD |  Gen 0 |  Gen 1 | Gen 2 | Allocated |
|------- |------------:|----------:|----------:|-------:|--------:|-------:|-------:|------:|----------:|
|   MEDI | 2,437.88 ns | 14.565 ns | 12.163 ns | 220.91 |    2.72 | 0.6332 | 0.0114 |     - |    6632 B |
|    Jab |    11.03 ns |  0.158 ns |  0.123 ns |   1.00 |    0.00 | 0.0046 |      - |     - |      48 B |

GetService

The GetService benchmark measures the provider.GetService<IService>() call.

| Method |      Mean |     Error |    StdDev | Ratio | RatioSD |  Gen 0 | Gen 1 | Gen 2 | Allocated |
|------- |----------:|----------:|----------:|------:|--------:|-------:|------:|------:|----------:|
|   MEDI | 39.340 ns | 0.2419 ns | 0.2263 ns |  7.01 |    0.09 | 0.0023 |     - |     - |      24 B |
|    Jab |  5.619 ns | 0.0770 ns | 0.0643 ns |  1.00 |    0.00 | 0.0023 |     - |     - |      24 B |

Unity installation

Navigate to the Packages directory of your project.
Adjust the project manifest file manifest.json in a text editor.
Ensure https://registry.npmjs.org/ is part of scopedRegistries.
Ensure com.pakrym is part of scopes.
Add com.pakrym.jab to the dependencies, stating the latest version.

A minimal example ends up looking like this:

{
  "scopedRegistries": [
    {
      "name": "npmjs",
      "url": "https://registry.npmjs.org/",
      "scopes": [
        "com.pakrym"
      ]
    }
  ],
  "dependencies": {
    "com.pakrym.jab": "0.10.2",
    ...
  }
}

Debugging locally

Run dotnet build /t:CreateLaunchSettings in the Jab.Tests directory would update the Jab\Properties\launchSettings.json file to include csc invocation that allows F5 debugging of the generator targeting the Jab.Tests project.

About

note

generating DI code

How to use

Example ( source csproj, source files )

CSharp Project
Program.cs
Database.cs
DatabaseCon.cs

This is the CSharp Project that references jab

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
    <ItemGroup>
        <PackageReference Include="Jab" Version="0.10.2" PrivateAssets="all" />
    </ItemGroup>
    <PropertyGroup>
        <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
        <CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
    </PropertyGroup>
</Project>

This is the use of jab in Program.cs

using InjectDemo;
using Jab;
MyServiceProvider sc = new();
//var con = sc.GetService<DatabaseCon>();
var db = sc.GetService<IDatabase>();
db.Open();


[ServiceProvider]
//[Transient(typeof(DatabaseCon), typeof(DatabaseCon))]
[Transient(typeof(IDatabase), typeof(DatabaseCon))]
internal partial class MyServiceProvider { }

This is the use of jab in Database.cs

namespace InjectDemo;

internal class Database : IDatabase
{
    private readonly DatabaseCon con;

    public Database(DatabaseCon con)
    {
        this.con = con;
    }
    public void Open()
    {
        Console.WriteLine($"open {con.Connection}");
    }

}

This is the use of jab in DatabaseCon.cs

namespace InjectDemo;

internal class DatabaseCon: IDatabase
{
    public string? Connection { get; set; }
    public void Open()
    {
        Console.WriteLine("open" + Connection);
    }
}

Generated Files

Those are taken from $(BaseIntermediateOutputPath)\GX

Attributes.cs
MyServiceProvider.Generated.cs

// <auto-generated/>

#if !JAB_ATTRIBUTES_REFERENCED || JAB_ATTRIBUTES_PACKAGE

using System;
using System.Threading.Tasks;

#nullable enable

namespace Jab
{
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ServiceProviderAttribute: Attribute
    {
        public Type[]? RootServices { get; set; }
    }

    [AttributeUsage(AttributeTargets.Interface, AllowMultiple = false, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ServiceProviderModuleAttribute: Attribute
    {
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ImportAttribute: Attribute
    {
        public Type ModuleType { get; }

        public ImportAttribute(Type moduleType)
        {
            ModuleType = moduleType;
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class SingletonAttribute: Attribute
    {
        public Type ServiceType { get; }

        public string? Name { get; set; }

        public Type? ImplementationType { get; }

        public string? Instance { get; set; }

        public string? Factory { get; set; }

        public SingletonAttribute(Type serviceType)
        {
            ServiceType = serviceType;
        }

        public SingletonAttribute(Type serviceType, Type implementationType)
        {
            ServiceType = serviceType;
            ImplementationType = implementationType;
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class TransientAttribute : Attribute
    {
        public Type ServiceType { get; }
        public string? Name { get; set; }

        public Type? ImplementationType { get; }

        public string? Factory { get; set; }

        public TransientAttribute(Type serviceType)
        {
            ServiceType = serviceType;
        }

        public TransientAttribute(Type serviceType, Type implementationType)
        {
            ServiceType = serviceType;
            ImplementationType = implementationType;
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ScopedAttribute : Attribute
    {
        public Type ServiceType { get; }
        public string? Name { get; set; }

        public Type? ImplementationType { get; }

        public string? Factory { get; set; }

        public ScopedAttribute(Type serviceType)
        {
            ServiceType = serviceType;
        }

        public ScopedAttribute(Type serviceType, Type implementationType)
        {
            ServiceType = serviceType;
            ImplementationType = implementationType;
        }
    }


    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
        class FromNamedServicesAttribute : Attribute
    {
        public string? Name { get; set; }

        public FromNamedServicesAttribute(string name)
        {
            Name = name;
        }
    }

#if GENERIC_ATTRIBUTES
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ImportAttribute<TModule> : ImportAttribute
    {
        public ImportAttribute() : base(typeof(TModule))
        {
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class TransientAttribute<TService> : TransientAttribute
    {
        public TransientAttribute() : base(typeof(TService))
        {
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class TransientAttribute<TService, TImpl> : TransientAttribute where TImpl: TService
    {
        public TransientAttribute() : base(typeof(TService), typeof(TImpl))
        {
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ScopedAttribute<TService> : ScopedAttribute
    {
        public ScopedAttribute() : base(typeof(TService))
        {
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class ScopedAttribute<TService, TImpl> : ScopedAttribute where TImpl: TService
    {
        public ScopedAttribute() : base(typeof(TService), typeof(TImpl))
        {
        }
    }


    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class SingletonAttribute<TService> : SingletonAttribute
    {
        public SingletonAttribute() : base(typeof(TService))
        {
        }
    }

    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)]
#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    class SingletonAttribute<TService, TImpl> : SingletonAttribute where TImpl: TService
    {
        public SingletonAttribute() : base(typeof(TService), typeof(TImpl))
        {
        }
    }

#endif

#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    interface IServiceProvider<T>
    {
        T GetService();
    }

#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    interface INamedServiceProvider<T>
    {
        T GetService(string name);
    }

#if JAB_ATTRIBUTES_PACKAGE
    public
#else
    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", null)]
    internal
#endif
    static class JabHelpers
    {
        public static InvalidOperationException CreateServiceNotFoundException<T>(string? name = null) =>
            CreateServiceNotFoundException(typeof(T), name);
        public static InvalidOperationException CreateServiceNotFoundException(Type type, string? name = null) =>
            new InvalidOperationException(
                name != null ?
                    $"Service with type {type} and name {name} not registered" :
                    $"Service with type {type} not registered");
    }
}

#endif

// <auto-generated/>

#nullable enable

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Threading.Tasks;
using Jab;

using static Jab.JabHelpers;
[global::System.CodeDom.Compiler.GeneratedCodeAttribute("Jab", "0.10.2.0")]
internal partial class MyServiceProvider : global::System.IDisposable,
   System.IAsyncDisposable,
   global::System.IServiceProvider,
   IServiceProvider<InjectDemo.IDatabase>,
   IServiceProvider<System.IServiceProvider>
{
    private Scope? _rootScope;
    
    InjectDemo.IDatabase IServiceProvider<InjectDemo.IDatabase>.GetService()
    {
        InjectDemo.DatabaseCon service = new InjectDemo.DatabaseCon();
        TryAddDisposable(service);
        return service;
    }
    
    System.IServiceProvider IServiceProvider<System.IServiceProvider>.GetService()
    {
        return this;
    }
    
    object? global::System.IServiceProvider.GetService(global::System.Type type){
        if (type == typeof(InjectDemo.IDatabase)) return this.GetService<InjectDemo.IDatabase>();
        if (type == typeof(System.IServiceProvider)) return this.GetService<System.IServiceProvider>();
        return null;
    }
    
    private global::System.Collections.Generic.List<object>? _disposables;
    
    private void TryAddDisposable(object? value){
        if (value is global::System.IDisposable || value is System.IAsyncDisposable)
        lock (this){
            (_disposables ??= new global::System.Collections.Generic.List<object>()).Add(value);
        }
    }
    
    public void Dispose(){
        void TryDispose(object? value) => (value as IDisposable)?.Dispose();
        
        TryDispose(_rootScope);
        if (_disposables != null){
            foreach (var service in _disposables){
                TryDispose(service);
            }
        }
    }
    
    public async global::System.Threading.Tasks.ValueTask DisposeAsync(){
        global::System.Threading.Tasks.ValueTask TryDispose(object? value){
            if (value is System.IAsyncDisposable asyncDisposable){
                return asyncDisposable.DisposeAsync();
            }
            else if (value is global::System.IDisposable disposable){
                disposable.Dispose();
            }
            return default;
        }
        
        await TryDispose(_rootScope);
        if (_disposables != null){
            foreach (var service in _disposables){
                await TryDispose(service);
            }
        }
    }
    
    [DebuggerHidden]
    public T GetService<T>() => this is IServiceProvider<T> provider ? provider.GetService() : throw CreateServiceNotFoundException<T>();
    
    [DebuggerHidden]
    public T GetService<T>(string name) => this is INamedServiceProvider<T> provider ? provider.GetService(name) : throw CreateServiceNotFoundException<T>(name);
    
    public Scope CreateScope() => new Scope(this);
    
    public partial class Scope : global::System.IDisposable,
       System.IAsyncDisposable,
       global::System.IServiceProvider,
       IServiceProvider<InjectDemo.IDatabase>,
       IServiceProvider<System.IServiceProvider>    
    {
        
        private MyServiceProvider _root;
        
        public Scope(MyServiceProvider root){
            _root = root;
        }
        
        [DebuggerHidden]
        public T GetService<T>() => this is IServiceProvider<T> provider ? provider.GetService() : throw CreateServiceNotFoundException<T>();
        
        [DebuggerHidden]
        public T GetService<T>(string name) => this is INamedServiceProvider<T> provider ? provider.GetService(name) : throw CreateServiceNotFoundException<T>(name);
        
        InjectDemo.IDatabase IServiceProvider<InjectDemo.IDatabase>.GetService(){
            InjectDemo.DatabaseCon service = new InjectDemo.DatabaseCon();
            TryAddDisposable(service);
            return service;
        }
        
        System.IServiceProvider IServiceProvider<System.IServiceProvider>.GetService(){
            return this;
        }
        
        object? global::System.IServiceProvider.GetService(global::System.Type type){
            if (type == typeof(InjectDemo.IDatabase)) return this.GetService<InjectDemo.IDatabase>();
            if (type == typeof(System.IServiceProvider)) return this.GetService<System.IServiceProvider>();
            return null;
        }
        
        private global::System.Collections.Generic.List<object>? _disposables;
        
        private void TryAddDisposable(object? value){
            if (value is global::System.IDisposable || value is System.IAsyncDisposable)
            lock (this){
                (_disposables ??= new global::System.Collections.Generic.List<object>()).Add(value);
            }
        }
        
        public void Dispose(){
            void TryDispose(object? value) => (value as IDisposable)?.Dispose();
            
            if (_disposables != null){
                foreach (var service in _disposables){
                    TryDispose(service);
                }
            }
        }
        
        public async global::System.Threading.Tasks.ValueTask DisposeAsync(){
            global::System.Threading.Tasks.ValueTask TryDispose(object? value){
                if (value is System.IAsyncDisposable asyncDisposable){
                    return asyncDisposable.DisposeAsync();
                }
                else if (value is global::System.IDisposable disposable){
                    disposable.Dispose();
                }
                return default;
            }
            
            if (_disposables != null){
                foreach (var service in _disposables){
                    await TryDispose(service);
                }
            }
        }
        
    }
    private Scope GetRootScope(){
        if (_rootScope == default)
        lock (this)
        if (_rootScope == default){
            _rootScope = CreateScope();
        }
        return _rootScope;
    }
}

Usefull

Download Example (.NET C# )

tip

Download Example project jab

https://ignatandrei.github.io/RSCG_Examples/v2/docs/jab

jab by Pavel Krymets

Nuget / site data

Details

Info

Original Readme

Jab Compile Time Dependency Injection

Example

Features

Singleton services

Singleton Instances

Named services

Factories

Scoped Services

Generic registration attributes

Modules

Root services

Samples

Console application

Performance

Startup time

GetService

Unity installation

Debugging locally

About

How to use

Example ( source csproj, source files )

Generated Files

Usefull

Download Example (.NET C# )

In the same category (DependencyInjection) - 5 other generators

AutoRegisterInject

depso

FactoryGenerator

Injectio

ServiceScan.SourceGenerator

jab by Pavel Krymets

Nuget / site data​

Details​

Info​

Original Readme​

Jab Compile Time Dependency Injection

Example​

Features​

Singleton services​

Singleton Instances​

Named services​

Factories​

Scoped Services​

Generic registration attributes​

Modules​

Root services​

Samples​

Console application​

Performance​

Startup time​

GetService​

Unity installation​

Debugging locally​

About​

How to use​

Example ( source csproj, source files )​

Generated Files​

Usefull​

Download Example (.NET C# )​

Share jab​

In the same category (DependencyInjection) - 5 other generators​

AutoRegisterInject​

depso​

FactoryGenerator​

Injectio​

ServiceScan.SourceGenerator​

Nuget / site data

Details

Info

Original Readme

Example

Features

Singleton services

Singleton Instances

Named services

Factories

Scoped Services

Generic registration attributes

Modules

Root services

Samples

Console application

Performance

Startup time

GetService

Unity installation

Debugging locally

About

How to use

Example ( source csproj, source files )

Generated Files

Usefull

Download Example (.NET C# )

Share jab

In the same category (DependencyInjection) - 5 other generators

AutoRegisterInject

depso

FactoryGenerator

Injectio

ServiceScan.SourceGenerator