public void 务端()
{
var connection = RabbitMQProducerHelper.GetConnection();
var channel = connection.CreateModel();
//申明队列接收远程调用请求
channel.QueueDeclare(queue: "rpc_queue", durable: false, exclusive: false, autoDelete: false, arguments: null);
var consumer = new EventingBasicConsumer(channel);
Console.WriteLine("[*] Waiting for message.");
//请求处理逻辑
consumer.Received += (model, ea) =>
{
var message = Encoding.UTF8.GetString(ea.Body);
int n = int.Parse(message);
Console.WriteLine($"Receive request of Fib({n})");
int result = n;
//从请求的参数中获取请求的唯一标识，在消息回传时同样绑定
var properties = ea.BasicProperties;
var replyProerties = channel.CreateBasicProperties();
replyProerties.CorrelationId = properties.CorrelationId;
//将远程调用结果发送到客户端监听的队列上
channel.BasicPublish(exchange: "", routingKey: properties.ReplyTo, basicProperties: replyProerties, body: Encoding.UTF8.GetBytes(result.ToString()));
//手动发回消息确认
channel.BasicAck(ea.DeliveryTag, false);
Console.WriteLine($"Return result: Fib({n})= {result}");
};
//启动消费者
channel.BasicConsume(queue: "rpc_queue", autoAck: false, consumer: consumer);
}
public void 客户端()
{
var connection = RabbitMQProducerHelper.GetConnection();
var channel = connection.CreateModel();
//申明唯一guid用来标识此次发送的远程调用请求
var correlationId = Guid.NewGuid().ToString();
//申明需要监听的回调队列
var replyQueue = channel.QueueDeclare().QueueName;
var properties = channel.CreateBasicProperties();
properties.ReplyTo = replyQueue; //指定回调队列
properties.CorrelationId = correlationId; //指定消息唯一标识
var body = Encoding.UTF8.GetBytes("123");
//发布消息
channel.BasicPublish(exchange: "", routingKey: "rpc_queue", basicProperties: properties, body: body);
Console.WriteLine($"[*] Request fib()");
//创建消费者用于处理消息回调（远程调用返回结果）
var callbackConsumer = new EventingBasicConsumer(channel);
channel.BasicConsume(queue: replyQueue, autoAck: true, consumer: callbackConsumer);
callbackConsumer.Received += (model, ea) =>
{
//仅当消息回调的ID与发送的ID一致时，说明远程调用结果正确返回。
if (ea.BasicProperties.CorrelationId == correlationId)
{
var responseMsg = $"Get Response: {Encoding.UTF8.GetString(ea.Body)}";
Console.WriteLine($"[x]: {responseMsg}");
}
};
}
