public override void HandleMessage(ReceivedMessageArgs messageObject)
{
Console.WriteLine($"{_identifier} message received");
using (var scope = _serviceProvider.CreateScope())
{
Type messageType = GetMessageTypeForAction(messageObject.Action);
var message = DeserializeMessage(messageObject, messageType);
var requestsRepository = scope.ServiceProvider.GetRequiredService <RequestsRepository>();
var repository = scope.ServiceProvider.GetRequiredService <TRepository>();
if (CheckIsHandleRequired(message, requestsRepository))
{
try
{
HandleMessageInternal(message, messageObject.Action, repository);
}
catch (Exception)
{
requestsRepository.DeleteRequestIdAsync(message.Id).GetAwaiter().GetResult();
throw;
}
}
else
{
Console.WriteLine($"{_identifier} message already handled: {message.Id}");
}
}
}
public async Task <string> HandleMessageAsync(ReceivedMessageArgs messageObject)
{
var baseMessage = JsonConvert.DeserializeObject <BaseTransactionMessage>(messageObject.Message);
if (await _requestsRepository.IsHandledOrSaveRequestAsync(baseMessage.Id, GetRequestIdInvalidationDate()))
{
return($"Already handled: {baseMessage.Id}");
}
try
{
switch (messageObject.Action)
{
case TransactionMessageActions.MoveTask_Complete:
return(await CompleteTransactionAsync(messageObject.Message));
case TransactionMessageActions.MoveTask_Rollback:
return(await RollbackTransactionAsync(messageObject.Message));
default:
return(await HandleMessageInternalAsync(messageObject.Message, messageObject.Action));
}
}
catch
{
await _requestsRepository.DeleteRequestIdAsync(baseMessage.Id);
throw;
}
}
protected virtual void PerformSafetyOnBgThread(Func <Task> action, ReceivedMessageArgs messageObject, TaskScheduler scheduler)
{
Task.Run(async() =>
{
await action();
})
.ContinueWith((t) =>
{
if (t.IsFaulted)
{
HandleMessageFailed(messageObject, t.Exception);
}
}, scheduler);
}
private void HandleMessage(object model, BasicDeliverEventArgs e)
{
try
{
Console.WriteLine($"Message received!");
var body = e.Body.ToArray();
var message = Encoding.UTF8.GetString(body);
var headers = e.BasicProperties?.Headers;
string actionHeader = GetHeaderValue(headers, _actionHeaderName);
string topic = e.RoutingKey;
var args = new ReceivedMessageArgs(topic, actionHeader, message);
MessageReceived?.Invoke(args);
_channel.BasicAck(e.DeliveryTag, false);
Console.WriteLine($"Message acked!");
}
catch (Exception exc)
{
Console.WriteLine($"{exc.Message}\n{exc.StackTrace}");
}
}
protected virtual void HandleMessageFailed(ReceivedMessageArgs messageObject, Exception e)
{
throw e;
}
protected abstract void OnMessageReceived(ReceivedMessageArgs messageObject);
protected virtual BaseMessage DeserializeMessage(ReceivedMessageArgs messageObject, Type type)
{
return(JsonConvert.DeserializeObject(messageObject.Message, type) as BaseMessage);
}