Microsoft.AspNetCore.AsyncState 9.0.0-preview.5.24311.7

Microsoft.AspNetCore.AsyncState

This provides the ability to store and retrieve state objects that flow with the current HttpContext across asynchronous operations. See Microsoft.Extensions.AsyncState for additional information.

The lifetime of the shared data is controlled automatically and will be the same as of HttpContext.

[!NOTE] Please note, the implementation of IAsyncContext<T> provided by this library is not thread-safe.

Install the package

From the command-line:

dotnet add package Microsoft.AspNetCore.AsyncState

Or directly in the C# project file:

<ItemGroup>
  <PackageReference Include="Microsoft.AspNetCore.AsyncState" Version="[CURRENTVERSION]" />
</ItemGroup>

Usage Example

Registering Services

The services can be registered using the following method:

public static IServiceCollection AddAsyncStateHttpContext(this IServiceCollection services)

Note: When calling AddAsyncStateHttpContext() there is no need to also invoke AddAsyncState() from the Microsoft.Extensions.AsyncState package.

Consuming Services

The IAsyncContext<T> can be injected wherever async state is needed. For example:

public class MyClass
{
  public MyClass(IAsyncContext<MyState> asyncContext) { Context = asyncContext }

  private IAsyncContext<MyState> Context { get; }

  public async Task DoWork()
  {
    var state = Context.Get();
    // or
    Context.Set(new MyState());
    // or
    if (Context.TryGet(out var state)) { ... }
  }
}

Feedback & Contributing

We welcome feedback and contributions in our GitHub repo.