public virtual async Task StartAsyncApp(
CancellationToken cancellationToken, IHttpApplication <HostingApplication.Context> hostingApp)
{
await Server.StartAsync(hostingApp, cancellationToken).ConfigureAwait(false);
// Fire IApplicationLifetime.Started
_applicationLifetime?.NotifyStarted();
// Fire IHostedService.Start
await _hostedServiceExecutor.StartAsync(cancellationToken).ConfigureAwait(false);
_logger.Started();
// Log the fact that we did load hosting startup assemblies.
if (_logger.IsEnabled(LogLevel.Debug))
{
foreach (var assembly in _options.GetFinalHostingStartupAssemblies())
{
_logger.LogDebug("Loaded hosting startup assembly {assemblyName}", assembly);
}
}
if (_hostingStartupErrors != null)
{
foreach (var exception in _hostingStartupErrors.InnerExceptions)
{
_logger.HostingStartupAssemblyError(exception);
}
}
}
public virtual async Task StartAsync(CancellationToken cancellationToken = default)
{
HostingEventSource.Log.HostStart();
_logger = _applicationServices.GetRequiredService <ILoggerFactory>().CreateLogger("Microsoft.AspNetCore.Hosting.Diagnostics");
_logger.Starting();
var application = BuildApplication();
_applicationLifetime = _applicationServices.GetRequiredService <ApplicationLifetime>();
_hostedServiceExecutor = _applicationServices.GetRequiredService <HostedServiceExecutor>();
// Fire IHostedService.Start
await _hostedServiceExecutor.StartAsync(cancellationToken).ConfigureAwait(false);
var diagnosticSource = _applicationServices.GetRequiredService <DiagnosticListener>();
var httpContextFactory = _applicationServices.GetRequiredService <IHttpContextFactory>();
var hostingApp = new HostingApplication(application, _logger, diagnosticSource, httpContextFactory);
await Server.StartAsync(hostingApp, cancellationToken).ConfigureAwait(false);
_startedServer = true;
// Fire IApplicationLifetime.Started
_applicationLifetime?.NotifyStarted();
_logger.Started();
// Log the fact that we did load hosting startup assemblies.
if (_logger.IsEnabled(LogLevel.Debug))
{
foreach (var assembly in _options.GetFinalHostingStartupAssemblies())
{
_logger.LogDebug("Loaded hosting startup assembly {assemblyName}", assembly);
}
}
if (_hostingStartupErrors != null)
{
foreach (var exception in _hostingStartupErrors.InnerExceptions)
{
_logger.HostingStartupAssemblyError(exception);
}
}
}
private void ExecuteHostingStartups()
{
var webHostOptions = new WebHostOptions(_config, Assembly.GetEntryAssembly()?.GetName().Name);
if (webHostOptions.PreventHostingStartup)
{
return;
}
var exceptions = new List <Exception>();
_hostingStartupWebHostBuilder = new HostingStartupWebHostBuilder(this);
// Execute the hosting startup assemblies
foreach (var assemblyName in webHostOptions.GetFinalHostingStartupAssemblies().Distinct(StringComparer.OrdinalIgnoreCase))
{
try
{
var assembly = Assembly.Load(new AssemblyName(assemblyName));
foreach (var attribute in assembly.GetCustomAttributes <HostingStartupAttribute>())
{
var hostingStartup = (IHostingStartup)Activator.CreateInstance(attribute.HostingStartupType);
hostingStartup.Configure(_hostingStartupWebHostBuilder);
}
}
catch (Exception ex)
{
// Capture any errors that happen during startup
exceptions.Add(new InvalidOperationException($"Startup assembly {assemblyName} failed to execute. See the inner exception for more details.", ex));
}
}
if (exceptions.Count > 0)
{
_hostingStartupErrors = new AggregateException(exceptions);
}
}
