public string MakePayment(CardPayment payment)
{
replyQueueName = channel.QueueDeclare("rpc_reply", true, false, false, null).QueueName;
props = channel.CreateBasicProperties();
var correlationId = Guid.NewGuid().ToString();
props.CorrelationId = correlationId;
props.ReplyTo = replyQueueName;
consumer.Received += (model, ea) =>
{
var body = ea.Body.ToArray();
var response = Encoding.UTF8.GetString(body);
if (ea.BasicProperties.CorrelationId == correlationId)
{
respQueue.Add(response);
}
};
channel.BasicPublish(
exchange: "",
routingKey: "rpc_queue",
basicProperties: props,
body: payment.Serialize());
channel.BasicConsume(
consumer: consumer,
queue: replyQueueName,
autoAck: true);
return(respQueue.Take());
}
public string MakePayment(CardPayment payment)
{
_corrId = Guid.NewGuid().ToString();
var props = _channel.CreateBasicProperties();
props.ReplyTo = _replyQueueName;
props.CorrelationId = _corrId;
_channel.BasicPublish("", "rpc_queue", props, payment.Serialize());
consumer.Received += Consumer_Received;
while (true)
{
consumer.Received += Consumer_Received;
//var ea = _consumer.Queue.Dequeue();
//if (ea.BasicProperties.CorrelationId != corrId) continue;
//var authCode = Encoding.UTF8.GetString(ea.Body);
//return authCode;
}
return(_authCode);
}
public string MakePayment(CardPayment payment)
{
// correleation id is useful when talking between micro services, we hence make sure we are recieving correct messages/replies
var corrId = Guid.NewGuid().ToString();
var props = _channel.CreateBasicProperties();
props.ReplyTo = _replyQueueName;
props.CorrelationId = corrId;
// defaulting to default exchange
_channel.BasicPublish("", "rpc_queue", props, payment.Serialize());
// we made a payment then started wauiting for a response
while (true)
{
var ea = _consumer.Queue.Dequeue();
// checking that is the correct correlation id of the stuff that I just sent
if (ea.BasicProperties.CorrelationId != corrId)
{
continue;
}
var authCode = Encoding.UTF8.GetString(ea.Body);
return(authCode);
}
}
public Task <string> MakePaymentAsync(CardPayment payment)
{
var tcs = new TaskCompletionSource <string>();
var correlationId = Guid.NewGuid().ToString();
pendingMessages[correlationId] = tcs;
SendMessage(payment.Serialize(), correlationId);
Console.WriteLine($"Sent: ${payment.Amount} from {payment.Name} with CorrelationId {correlationId}");
return(tcs.Task);
}
public void SendPayment(CardPayment payment)
{
SendMessage(payment.Serialize(), "payment.card");
Console.WriteLine(" Payment Sent {0}, £{1}", payment.CardNumber,
payment.Amount);
}
/*
* The client application posts messages directly onto a queue.
* For each message that gets posted, the application waits for a reply from a reply queue.
* This essentially makes this a synchronous process.
*/
public string MakePayment(CardPayment payment)
{
//we need a guid which is global unique identifier the consumer application
//will put that same correlation ID onto the reply
//i.e. assure that we're dealing with the correct reply by checking the ID.
var corrId = Guid.NewGuid().ToString();
var props = _channel.CreateBasicProperties();
props.ReplyTo = _replyQueueName;
/*
* When a message is posted to the server from the client,
* a correlation ID is generated and attached to the message properties.
* The same correlation ID is put onto the properties in a reply message.
* This is useful, as it allows you to easily tie together the replies in
* the originating messages if you store them for retrieval later.
* The client posts a message to the RPC queue that has a correlation ID of e.g. 12345.
* This message is received by the server and a reply is sent back to the client
* on a reply queue with the same correlation ID of e.g 12345.
*/
props.CorrelationId = corrId;
//create the RPC queue and bind it to the default exchange with routingKey (rpc_queue)
//also pass our properties into basic publish along with a serialized card payment message
_channel.BasicPublish(exchange: "", routingKey: "rpc_queue", basicProperties: props, body: payment.Serialize());
//just sitting and wait for a response from the direct card payment consumer
while (true) //run an infinite loop to listen to messages in the queue
{
//de-queue the message
var ea = _consumer.Queue.Dequeue();
//check that the correlation ID from the message coming back is the same
//as the ID we stored earlier
if (ea.BasicProperties.CorrelationId != corrId)
{
continue;
}
var authCode = Encoding.UTF8.GetString(ea.Body);
return(authCode);
}
}
public string MakePayment(CardPayment payment)
{
var corrId = Guid.NewGuid().ToString();
var props = _channel.CreateBasicProperties(); // Pegando as propriedades do objeto de volta
props.ReplyTo = _replyQueueName; // Fila de resposta
// Colocando uma guid no CorrelationId
// A aplicação consumer irá colocar o mesmo id na resposta
// Isso garante que estamos lendo a mensagem enviada
props.CorrelationId = corrId;
// Passando as propriedades para a fila (ReplyTo e CorrelationId)
Console.WriteLine($" Direct Payment Sent {payment.CardNumber}, £{payment.Amount}");
_channel.BasicPublish("", "rpc_queue", props, payment.Serialize());
string authCode = "";
//bool responseReceived = true;// Teste para esperar resposta, não recomendado
// Alternativa utilizando pull api (não recomendada)
//https://www.rabbitmq.com/dotnet-api-guide.html
BasicGetResult result = null;
while (result == null) // Recomendado TimeOut
{
result = _channel.BasicGet(_replyQueueName, autoAck: false);
if (result != null)
{
// Somente processar a resposta da mensagem enviada
//http://www.matthiassommer.it/programming/remote-procedure-calls-with-rabbitmq/
if (result.BasicProperties.CorrelationId != corrId)
{
continue;
}
var body = result.Body.ToArray();
authCode = Encoding.UTF8.GetString(body);
_channel.BasicAck(result.DeliveryTag, false);
}
}
// Anonymous function event handling
// Ver como faria para retornar a mensagem ou acionar algum método com ela
// _consumer.Received += (model, ea) => // suporta async
// {
// // Checando se o ID é o mesmo da menasgem enviada
// if (ea.BasicProperties.CorrelationId == corrId)
// {
// var body = ea.Body.ToArray();
// authCode = Encoding.UTF8.GetString(body);
// responseReceived = false;
// Console.WriteLine($"Message received with authcode: {authCode}");
// }
// };
// Registra o consumer para ouvir a fila
//_channel.BasicConsume(_replyQueueName, true, _consumer);
//TODO: Pesquisar forma correta de retornar resposta síncrona
// while (responseReceived)
// {
// // prender no loop
// }
return(authCode);
}
public void SendPayment(CardPayment payment)
{
SendMessage(payment.Serialize(), "payment.card");
Console.WriteLine($" Payment Sent {payment.CardNumber} : {payment.AmountToPay}");
}
public void SendCardPayment(CardPayment cardPayment)
{
SendMessage(cardPayment.Serialize(), CardRoutingKey);
}