private async void NumberReceivedEventHandler(object?sender, NumberGeneratedEventArgs e)
{
_logger.LogInformation($"Number received: {e.Number}");
var isPersisted = false;
while (!isPersisted)
{
try
{
_logger.LogInformation($"Trying to persist number: {e.Number}");
using (var scope = _scopeFactory.CreateScope())
{
var numberProcessor = scope.ServiceProvider.GetRequiredService <INumberProcessor>();
await numberProcessor.PersistAsync(e.Number);
}
isPersisted = true;
}
catch (Exception ex)
{
_logger.LogInformation($"Could not persist this number: {e.Number}, will try again later. Details: {ex}");
await Task.Delay(1000);
}
}
}
private async void OnNumberGenerated(object sender, NumberGeneratedEventArgs e)
{
try
{
_logger.LogDebug($"{nameof(OnNumberGenerated)}: {e.Number}");
var repo = new RandomNumber(e.Number);
_repository.Add(repo);
if (await _repository.SaveChangesAsync())
{
_logger.LogDebug($"{nameof(OnNumberGenerated)}: {e.Number} saved to DB");
}
else
{
_logger.LogWarning($"Failed to save to DB {nameof(OnNumberGenerated)}");
}
if (e.Number > 800)
{
CancellationToken cts = new CancellationTokenSource().Token;
//post to endpoint
var dto = new NumberDto
{
Id = repo.RandomNumberId,
Number = repo.Number,
CreatedAt = repo.CreatedAt
};
var json = JsonConvert.SerializeObject(dto);
var data = new StringContent(json, Encoding.UTF8, "application/json");
var response = await _clientLocal.PostAsync("api/numbers", data, cts).ConfigureAwait(false);
if (response.IsSuccessStatusCode)
{
//may be log
}
else
{
_logger.LogDebug($"StatusCode {response.StatusCode.ToString()} during posting message {dto.ToString()}");
return;
}
}
}
catch (Exception ex)
{
_logger.LogError(ex, $"Error in {nameof(OnNumberGenerated)}");
}
}
private void NumberGenerator_NumberGenerated(object sender, NumberGeneratedEventArgs e)
{
Log.Info($"Number generated: {e.Number} ");
lock (_lockObject)
{
var randonNumber = new RandomNumber
{
Value = e.Number,
GeneratedTime = DateTime.UtcNow
};
randonNumber.ServiceCallRetryRequired = !CallServiceForLargeNumberNotification(randonNumber).Result;
//instead of saving everything in one batch I am saving per item in case an error interrupts the process and we have a record of what was already generated
using (var numberRepository = new RandomNumberRepository())
{
numberRepository.AddRandomNumber(randonNumber);
numberRepository.Save();
}
}
}
void generator_NumberGenerated(object sender, NumberGeneratedEventArgs e)
{
var number = new Number(e.Execution, e.BatchSequence, e.Number);
Assert.True(number.Value > 0);
}
private static void NumberGenerator_NumberGenerated(object sender, NumberGeneratedEventArgs e)
{
Console.WriteLine($"Number generated {e.Number}");
}
