static async Task <IExceptionHandler> AwaitedCreate(
ExceptionMappingSchemeRegistration scheme,
IServiceProvider serviceProvider)
{
var handler = scheme.HandlerFactory(serviceProvider);
await handler.InitializeAsync(scheme.Name);
return(handler);
}
public Task <IExceptionHandler> GetHandlerAsync(ExceptionMappingSchemeRegistration scheme)
{
if (scheme == null)
{
throw new ArgumentNullException(nameof(scheme));
}
Task <IExceptionHandler>?handlerTask;
lock (_lock)
{
// Happy path: get from cache.
if (!_cache.TryGetValue(scheme.Name, out handlerTask))
{
// Slow path: create the handler and initialize it
// The handler task may complete synchronously here
handlerTask = AwaitedCreate(scheme, _serviceProvider);
_cache.Add(scheme.Name, handlerTask);
}
}
return(handlerTask);
