MeleagantDependencyScan

The purpose of this library is to provide tools to facilitate dependency injection when using dotnet.

How to use (classic case)

First : Decorate needed classes

Singleton (without interfaces)

The simplest use case is the singleton without interfaces :

using MeleagantDependencyScan.Attributes;

[MeleagantInjection] // By default LifeTime is intialized to Singleton, so there's no need to specify it in this case
public class AuthService
{
  // Your auth logic
}

Transient or Scoped (without interfaces)

Transient use case without interfaces :

using MeleagantDependencyScan.Attributes;

[MeleagantInjection(LifeTime = ServiceLifetime.Transient)]
public class AuthService
{
  // Your auth logic
}

Scoped use case without interfaces :

using MeleagantDependencyScan.Attributes;

[MeleagantInjection(LifeTime = ServiceLifetime.Scoped)]
public class AuthService
{
  // Your auth logic
}

With interfaces (Scoped)

Let's assume that we have an IAuthService interface

public interface IAuthService
{
  string Register(RegisterDto registerDto);
}

And a custom auth service that implement this interface here it's MySuperAuthService. And we needed it with the scoped life time.

using MeleagantDependencyScan.Attributes;

[MeleagantInjection(LifeTime = ServiceLifetime.Scoped, VisibleFromInterface = true, VisibleAs = [typeof(IAuthService)])]
public class MySuperAuthService : IAuthService
{
  // Your auth logic
  public string Register(RegisterDto registerDto)
  {
    // Register logic
  }
}

With interfaces (Transient)

Same as Scope you just need to change the LifeTime to Transient

With interfaces (Singleton)

Same as Scope you just need to change the LifeTime to Singleton. Note that LifeTime is set to Singleton by default

Then : Scan your assemblies

To register your classes in the ServiceCollection you must add the ScanAssemblies instruction to your Program.cs

Single assembly

using MeleagantDependencyScan.Extensions;

// Some logic ...

// Use this instruction
builder.Services.ScanAssemblies("MySuperAssembly");

// Before this one
var app = builder.Build();

Multiple assembly

using MeleagantDependencyScan.Extensions;

// Some logic ...

// Use this instruction
builder.Services.ScanAssemblies("MySuperAssembly", "MyAwesomeAssembly");

// Before this one
var app = builder.Build();

How to use (keyed case)

First : Decorate needed classes

With interfaces (Scoped)

Let's assume that we have an IAuthService interface

public interface IAuthService
{
  string Register(RegisterDto registerDto);
}

And two custom auth services that implement this interface here it's MySuperAuthService and MyFabulousAuthService. And we needed it with the scoped life time.

using MeleagantDependencyScan.Attributes;

[MeleagantInjectionKeyed(LifeTime = ServiceLifetime.Scoped, VisibleFromInterface = true, VisibleAs = [typeof(IAuthService)], Key = "Super")]
public class MySuperAuthService : IAuthService
{
  // Your auth logic
  public string Register(RegisterDto registerDto)
  {
    // Register logic
  }
}

[MeleagantInjectionKeyed(LifeTime = ServiceLifetime.Scoped, VisibleFromInterface = true, VisibleAs = [typeof(IAuthService)], Key = "Fabulous")]
public class MyFabulousAuthService : IAuthService
{
  // Your auth logic
  public string Register(RegisterDto registerDto)
  {
    // Register logic
  }
}

With interfaces (Transient)

Same as Scope you just need to change the LifeTime to Transient

With interfaces (Singleton)

Same as Scope you just need to change the LifeTime to Singleton. Note that LifeTime is set to Singleton by default

Then : Scan your assemblies

To register your classes in the ServiceCollection you must add the ScanAssemblies instruction to your Program.cs

Single assembly

using MeleagantDependencyScan.Extensions;

// Some logic ...

// Use this instruction
builder.Services.ScanKeyedAssemblies("MySuperAssembly");

// Before this one
var app = builder.Build();

Multiple assembly

using MeleagantDependencyScan.Extensions;

// Some logic ...

// Use this instruction
builder.Services.ScanKeyedAssemblies("MySuperAssembly", "MyAwesomeAssembly");

// Before this one
var app = builder.Build();