public override void OnStopHost()
{
//Base handling
base.OnStopHost();
//Just fire the event
if (HostShutdown != null)
{
HostShutdown.Invoke();
}
}
/// <summary>
/// runs the host service
/// </summary>
/// <typeparam name="THostService">host service type</typeparam>
/// <typeparam name="TCmdOptions">options type</typeparam>
/// <typeparam name="TIConfiguration">read only configuration type</typeparam>
/// <typeparam name="TConfiguration">configurationtype</typeparam>
/// <param name="args">command line args</param>
/// <returns>async task</returns>
public static async Task <int> RunAsync <THostService, TCmdOptions, TIConfiguration, TConfiguration>(string[] args)
where THostService : AbbotwareHostService <TIConfiguration>
where TCmdOptions : class, new()
where TIConfiguration : class, IHostOptions
where TConfiguration : class, TIConfiguration
{
try
{
// used to signal shutdown for the host.RunAsync
using var cts = new CancellationTokenSource();
// wrapper around the cts to inject into the running service
var requestShutdown = new HostShutdown(cts);
// wrapper around the cts to to allow monitoring for shutdown
var monitorShutdown = new MonitorShutdown(cts.Token);
var cmdOptions = new TCmdOptions();
var parsed = Parser.Default.ParseArguments <TCmdOptions>(args);
parsed.WithParsed(d => { cmdOptions = d; });
var host = new HostBuilder()
.ConfigureServices((hostContext, services) =>
{
services.AddOptions();
// register only the minimal amount of dependencies - the service will use its own container
services.AddSingleton(new ConsoleArguments(args));
services.AddSingleton(cmdOptions);
services.AddSingleton <TIConfiguration, TConfiguration>();
services.AddSingleton <IRequestShutdown>(requestShutdown);
services.AddSingleton <IMonitorShutdown>(monitorShutdown);
services.AddSingleton <IHostedService, THostService>();
})
.ConfigureLogging((hostingContext, logging) =>
{
logging.AddConfiguration(hostingContext.Configuration.GetSection("Logging"));
logging.AddConsole();
})
.Build();
await host.RunAsync(cts.Token)
.ConfigureAwait(false);
return(0);
}
catch (Exception ex)
{
Console.WriteLine($"ERROR:{ex}");
throw;
}
}
