public void RegisterCommandConsumer(string queue, IConsumeExecutor executor)
{
var channel = _conn.CreateModel();
channel.ExchangeDeclare(queue, ExchangeType.Direct, true, false);
channel.QueueDeclare(queue, true, false, false, null);
channel.QueueBind(queue, queue, "", null);
var consumer = new AsyncEventingBasicConsumer(channel);
consumer.Received += GetReceived(executor, queue, channel);
channel.BasicConsume(queue, false, consumer);
}
public void RegisterEventConsumer(string queue, string[] exchanges, IConsumeExecutor executor)
{
var channel = _conn.CreateModel();
channel.QueueDeclare(queue, true, false, false, null);
foreach (var exchange in exchanges)
{
channel.ExchangeDeclare(exchange, ExchangeType.Fanout, true, false);
channel.QueueBind(queue, exchange, "", null);
}
var consumer = new AsyncEventingBasicConsumer(channel);
consumer.Received += GetReceived(executor, queue, channel);
channel.BasicConsume(queue, false, consumer);
}
private AsyncEventHandler <BasicDeliverEventArgs> GetReceived(IConsumeExecutor executor, string queue, IModel channel)
{
return(async(model, ea) =>
{
var metadata = new ConsumeMessageMetadata()
{
Queue = queue,
Exchange = ea.Exchange
};
Func <string> messageType = () => (string)ea.BasicProperties.Headers["message_type"];
try
{
await executor.Execute(GetExchangePublisher(), messageType, ea.Body.ToArray(), metadata);
channel.BasicAck(ea.DeliveryTag, false);
}
catch (Exception e)
{
var dataArr = ea.Body.ToArray();
channel.BasicNack(ea.DeliveryTag, false, true);
var errMsg = new PayQueueError()
{
ServiceLabel = _conf.ServiceLabel,
ConsumeMessageType = messageType(),
ConsumeParams = Encoding.UTF8.GetString(dataArr, 0, dataArr.Length),
ExceptionType = e.GetType().ToString(),
ExceptionMessage = e.Message,
ExceptionStacktrace = e.StackTrace,
Exchange = ea.Exchange
};
var data = JsonSerializer.Serialize(errMsg);
await new PooledExchangePublisher(_poolChannel.Writer)
.PublishError(_conf.ErrorExchange, _conf.ErrorQueue, Encoding.UTF8.GetBytes(data));
}
});
}
