Barney.WaitForIt

A simple helper to perform async application initialization in .NET Core 2.0 or higher.

Usage

Install the Barney.WaitForIt NuGet package:

Command line:
```
dotnet add package Barney.WaitForIt
```
Package manager console:
```
Install-Package Barney.WaitForIt
```

Create a class (or several) that implements IAsyncInitializer. This class can depend on any registered service.

public class MyAppInitializer : IAsyncInitializer
{
    public MyAppInitializer(IFoo foo, IBar bar)
    {
        ...
    }

    public async Task InitializeAsync()
    {
        // Initialization code here
    }
}

Register your initializer(s) in the Startup.ConfigureServices method:
```
    services.AddAsyncInitializer<MyAppInitializer>();
```

In the Program class, make the Main method async and change its code to initialize the host before running it:

public static async Task Main(string[] args)
{
    var host = new HostBuilder()
                    .ConfigureServices(configureServices)
                    .UseConsoleLifetime()
                    .Build();
    
    await host.WaitForItAsync();
    await host.StartAsync();
}

(Note that you need to set the C# language version to 7.1 or higher in your project to enable the "async Main" feature.)

This will run each initializer, in the order in which they were registered.

acessocard/Barney.WaitForIt

Barney.WaitForIt

Usage