private void SerializeDatabaseMessage(DatabaseMessage message)
{
JsonDataTransferMessage dtm = ProduceDataTransferMessage(message);
string json = JsonSerializer.Serialize(dtm);
message.MessageBytes = Encoding.UTF8.GetBytes(json);
}
private void ProcessMessage(object sender, BasicDeliverEventArgs args)
{
if (!(sender is EventingBasicConsumer consumer))
{
return;
}
if (!ConsumerTags.TryGetValue(args.ConsumerTag, out string exchange))
{
UnsubscribeConsumer(consumer, args.ConsumerTag);
return;
}
JsonDataTransferMessage dataTransferMessage = null;
try
{
byte[] body = args.Body.ToArray();
string messageBody = Encoding.UTF8.GetString(body);
dataTransferMessage = JsonSerializer.Deserialize <JsonDataTransferMessage>(messageBody);
}
catch (Exception error)
{
FileLogger.Log(LOG_TOKEN, ExceptionHelper.GetErrorText(error));
}
if (dataTransferMessage == null)
{
RemovePoisonMessage(exchange, consumer, args.DeliveryTag);
return;
}
bool success = true;
IDatabaseMessageProducer producer = Services.GetService <IDatabaseMessageProducer>();
try
{
DatabaseMessage message = producer.ProduceMessage(dataTransferMessage);
success = producer.InsertMessage(message);
if (success)
{
consumer.Model.BasicAck(args.DeliveryTag, false);
}
}
catch (Exception error)
{
success = false;
FileLogger.Log(LOG_TOKEN, ExceptionHelper.GetErrorText(error));
}
if (!success)
{
ResetConsumer(args.ConsumerTag); // return unacked messages back to queue in the same order (!)
FileLogger.Log(LOG_TOKEN, "Failed to process message. Consumer for exchange \"" + exchange + "\" has been reset.");
}
}
public DatabaseMessage ProduceMessage(JsonDataTransferMessage message)
{
DatabaseMessage dbm = new DatabaseMessage();
dbm.Sender = message.Sender;
if (message.Objects.Count > 0)
{
dbm.MessageType = message.Objects[0].Type;
dbm.MessageBody = message.Objects[0].Body;
dbm.OperationType = message.Objects[0].Operation;
}
return(dbm);
}
private JsonDataTransferMessage ProduceDataTransferMessage(DatabaseMessage data)
{
JsonDataTransferMessage message = new JsonDataTransferMessage()
{
Sender = data.Sender
};
message.Objects.Add(new JsonDataTransferObject()
{
Type = data.MessageType,
Body = data.MessageBody,
Operation = data.OperationType
});
return(message);
}
public DatabaseMessage ProduceMessage(JsonDataTransferMessage message)
{
DatabaseMessage dbm = new DatabaseMessage()
{
Sender = message.Sender,
DateTimeStamp = DateTime.Now.AddYears(YearOffset)
};
if (message.Objects.Count > 0)
{
dbm.MessageType = message.Objects[0].Type;
dbm.MessageBody = message.Objects[0].Body;
dbm.OperationType = message.Objects[0].Operation;
}
return(dbm);
}
private JsonDataTransferMessage GetJsonDataTransferMessage(BasicDeliverEventArgs args)
{
string messageBody = Encoding.UTF8.GetString(args.Body.Span);
JsonDataTransferMessage dataTransferMessage = null;
if (string.IsNullOrWhiteSpace(args.BasicProperties.Type))
{
try
{
dataTransferMessage = JsonSerializer.Deserialize <JsonDataTransferMessage>(messageBody);
}
catch (Exception error)
{
FileLogger.Log(LOG_TOKEN, ExceptionHelper.GetErrorText(error));
}
}
else
{
dataTransferMessage = new JsonDataTransferMessage()
{
Sender = (args.BasicProperties.AppId == null ? string.Empty : args.BasicProperties.AppId)
};
dataTransferMessage.Objects.Add(new JsonDataTransferObject()
{
Type = (args.BasicProperties.Type == null ? string.Empty : args.BasicProperties.Type),
Body = messageBody,
Operation = string.Empty
});
if (args.BasicProperties.Headers != null)
{
if (args.BasicProperties.Headers.TryGetValue("OperationType", out object value))
{
if (value is byte[] operationType)
{
dataTransferMessage.Objects[0].Operation = Encoding.UTF8.GetString(operationType);
}
}
}
}
return(dataTransferMessage);
}
private void ProcessMessage(object sender, BasicDeliverEventArgs args)
{
if (!(sender is EventingBasicConsumer consumer))
{
return;
}
if (!ConsumerTags.TryGetValue(args.ConsumerTag, out string exchange))
{
//TODO: review commented code
//UnsubscribeConsumer(consumer, args.ConsumerTag);
//return;
if (!string.IsNullOrWhiteSpace(args.Exchange))
{
exchange = args.Exchange;
}
else if (!string.IsNullOrWhiteSpace(args.RoutingKey))
{
exchange = args.RoutingKey;
}
else
{
exchange = "unknown";
}
}
JsonDataTransferMessage dataTransferMessage = GetJsonDataTransferMessage(args);
if (dataTransferMessage == null)
{
RemovePoisonMessage(exchange, consumer, args.DeliveryTag);
return;
}
bool success = true;
IDatabaseMessageProducer producer = Services.GetService <IDatabaseMessageProducer>();
try
{
DatabaseMessage message = producer.ProduceMessage(dataTransferMessage);
success = producer.InsertMessage(message);
if (success)
{
consumer.Model.BasicAck(args.DeliveryTag, false);
}
}
catch (Exception error)
{
success = false;
FileLogger.Log(LOG_TOKEN, ExceptionHelper.GetErrorText(error));
}
if (!success)
{
// return unacked messages back to queue in the same order (!)
ResetConsumer(args.ConsumerTag);
FileLogger.Log(LOG_TOKEN,
"Failed to process message. Consumer (tag = " + args.ConsumerTag.ToString()
+ ") for exchange \"" + exchange + "\" has been reset.");
}
}
