private (string name, string data) GetMessage(AuditDataEvent @event)
{
var attribute = @event.GetType().GetCustomAttribute <EventAttribute>();
if (attribute == null)
{
throw new ArgumentException($"{nameof(EventAttribute)} missing on {nameof(@event)}");
}
if (string.IsNullOrEmpty(attribute.Name))
{
throw new ArgumentNullException(
$"{nameof(EventAttribute)}.Name missing on {nameof(@event)}");
}
var serializerSettings = new JsonSerializerSettings {
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var message = new RabbitMqMessage
{
Name = attribute.Name,
EventData = JsonConvert.SerializeObject(@event, serializerSettings)
};
return(attribute.Name, JsonConvert.SerializeObject(message, serializerSettings));
}
public void SendMessage(AuditDataEvent @event)
{
(string name, string data)message = GetMessage(@event);
var shouldDispose = tracer.CurrentTransaction == null;
var transaction = shouldDispose ? tracer.StartTransaction($"{message.name}", "event-publisher") : tracer.CurrentTransaction;
try
{
var factory = new ConnectionFactory()
{
HostName = _rabbitMqConfig.Value.Hostname,
UserName = _rabbitMqConfig.Value.UserName,
Password = _rabbitMqConfig.Value.Password
};
var span = transaction.StartSpan($"Send message to exchange {_rabbitMqConfig.Value.Exchange}", "rabbitmq", subType: ApiConstants.TypeExternal);
span.SetLabel("Message name", message.name);
span.SetLabel("Message content", message.data);
using (var connection = factory.CreateConnection())
using (var channel = connection.CreateModel())
{
channel.ExchangeDeclare(exchange: _rabbitMqConfig.Value.Exchange, type: ExchangeType.Fanout, durable: false, autoDelete: false, arguments: null);
var json = message.data;
var body = Encoding.UTF8.GetBytes(json);
channel.BasicPublish(exchange: _rabbitMqConfig.Value.Exchange, routingKey: "netcoremicroservices-key", basicProperties: null, body: body);
}
span?.End();
var logData = new
{
Type = "EventProducer",
Event = message.name,
Data = @event
};
_logger.LogInformation("Type: {type}, event send {event} on topic {topic} : {data}", "EventProducer", message.name, _rabbitMqConfig.Value.Exchange, JObject.FromObject(logData).ToString());
}
catch (Exception e)
{
transaction.CaptureException(e);
_logger.LogError(e.Message);
}
if (shouldDispose)
{
transaction.End();
}
}
