C#•8mo ago

❔ IServiceProvider, scoped services, scopes

is it correct usage?

projectA:
services.AddScoped<FooContext>();
var serviceProvider = services.BuildServiceProvider()

using(var scope = serviceProvider.CreateScope())
{
  var fooContext = serviceProvider.GetRequiredService<FoContext>();
  fooContext.SetFoo("foobar");
  // let's say here i call mediator, other code that may use foocontext
}

projectB:
public class SomeClass // Part of same service provider, it maybe a mediator request handler
{
  public Someclass(FooContext fooContext)
  {
    var foo = fooContext.GetFoo() // "foobar"
  }
}

projectA:
services.AddScoped<FooContext>();
var serviceProvider = services.BuildServiceProvider()

using(var scope = serviceProvider.CreateScope())
{
  var fooContext = serviceProvider.GetRequiredService<FoContext>();
  fooContext.SetFoo("foobar");
  // let's say here i call mediator, other code that may use foocontext
}

projectB:
public class SomeClass // Part of same service provider, it maybe a mediator request handler
{
  public Someclass(FooContext fooContext)
  {
    var foo = fooContext.GetFoo() // "foobar"
  }
}

6 Replies

CrosRoad95•8mo ago

FooContext will be initialized onced and then will be reused later inside this scope?

Anu6is•8mo ago

you aren't actually using the scope that you created

using(var scope = serviceProvider.CreateScope())
{
  //get the service provider from the scope
  var fooContext = scope.ServiceProvider.GetRequiredService<FoContext>();
  fooContext.SetFoo("foobar");
  // let's say here i call mediator, other code that may use foocontext
  var mediator = scope.ServiceProvider.GetRequiredService<IMediator>();
  //doing something with this mediator should propogate the current scope 
  //mediator.Send(...)
}

using(var scope = serviceProvider.CreateScope())
{
  //get the service provider from the scope
  var fooContext = scope.ServiceProvider.GetRequiredService<FoContext>();
  fooContext.SetFoo("foobar");
  // let's say here i call mediator, other code that may use foocontext
  var mediator = scope.ServiceProvider.GetRequiredService<IMediator>();
  //doing something with this mediator should propogate the current scope 
  //mediator.Send(...)
}

CrosRoad95•8mo ago

i though this "ServiceProvider" is just reference back and don't need to be used 🤔

Pobiega•8mo ago

? Anubis got it right, you need to access the scoped service provider

Exeteres•8mo ago

you can create multiple scopes and use them simultaneously so each scope has it's own service provider with services of this scope

Accord•8mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ IServiceProvider, scoped services, scopes