■ Remote Procedure Call을 사용하는 방법을 보여준다.
[TestProducer 프로젝트]
▶ Program.cs
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using System; using System.Text; using RabbitMQ.Client; using RabbitMQ.Client.Events; namespace TestProducer { /// <summary> /// 프로그램 /// </summary> class Program { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 프로그램 시작하기 - Main() /// <summary> /// 프로그램 시작하기 /// </summary> /// <param name="argumentArray">인자 배열</param> private static void Main(string[] argumentArray) { ConnectionFactory factory = new ConnectionFactory() { HostName = "localhost" }; using(IConnection connection = factory.CreateConnection()) { using(IModel model = connection.CreateModel()) { model.QueueDeclare ( queue : "rpc_queue", durable : false, exclusive : false, autoDelete : false, arguments : null ); model.BasicQos(0, 1, false); EventingBasicConsumer consumer = new EventingBasicConsumer(model); model.BasicConsume ( queue : "rpc_queue", autoAck : false, consumer : consumer ); WriteLog("RPC 요청을 대기하고 있습니다."); consumer.Received += (sender, e) => { string response = null; byte[] requestArray = e.Body; IBasicProperties requestBasicProperties = e.BasicProperties; IBasicProperties replyBasicProperties = model.CreateBasicProperties(); replyBasicProperties.CorrelationId = requestBasicProperties.CorrelationId; try { string requestMessage = Encoding.UTF8.GetString(requestArray); int value = int.Parse(requestMessage); WriteLog("{0}의 피보나치 수열 계산을 시작합니다.", requestMessage); int result = GetFibonacciSequence(value); response = result.ToString(); } catch(Exception exception) { WriteLog("예외가 발생했습니다 :\n{0}", exception.Message); response = ""; } finally { byte[] responseByteArray = Encoding.UTF8.GetBytes(response); model.BasicPublish ( exchange : "", routingKey : requestBasicProperties.ReplyTo, basicProperties : replyBasicProperties, body : responseByteArray ); model.BasicAck ( deliveryTag : e.DeliveryTag, multiple : false ); } }; Console.WriteLine("프로그램을 종료하려면 아무 키나 눌러 주시기 바랍니다."); Console.ReadKey(true); } } } #endregion #region 로그 작성하기 - WriteLog(format, parameterArray) /// <summary> /// 로그 작성하기 /// </summary> /// <param name="format">포맷 문자열</param> /// <param name="parameterArray">매개 변수 배열</param> private static void WriteLog(string format, params object[] parameterArray) { string message; if(parameterArray.Length == 0) { message = format; } else { message = string.Format(format, parameterArray); } string log = string.Format("[{0}] {1}", DateTime.Now.ToString("HH:mm:ss"), message); Console.WriteLine(log); } #endregion #region 피보나치 수열 구하기 - GetFibonacciSequence(sourceValue) /// <summary> /// 피보나치 수열 구하기 /// </summary> /// <param name="sourceValue">소스 값</param> /// <returns>피보나치 수열</returns> private static int GetFibonacciSequence(int sourceValue) { if(sourceValue == 0 || sourceValue == 1) { return sourceValue; } return GetFibonacciSequence(sourceValue - 1) + GetFibonacciSequence(sourceValue - 2); } #endregion } } |
[TestConsumer 프로젝트]
▶ RPCClient.cs
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using System; using System.Collections.Concurrent; using System.Text; using RabbitMQ.Client; using RabbitMQ.Client.Events; namespace TestConsumer { /// <summary> /// RPC 클라이언트 /// </summary> public class RPCClient { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 연결 /// </summary> private readonly IConnection connection; /// <summary> /// 모델 /// </summary> private readonly IModel model; /// <summary> /// 응답 큐 명칭 /// </summary> private readonly string replyQueueName; /// <summary> /// 이벤트 기본 소비자 /// </summary> private readonly EventingBasicConsumer eventingBasicConsumer; /// <summary> /// 기본 속성 /// </summary> private readonly IBasicProperties basicProperties; /// <summary> /// 차단 컬렉션 /// </summary> private readonly BlockingCollection<string> blockingCollection = new BlockingCollection<string>(); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - RPCClient() /// <summary> /// 생성자 /// </summary> public RPCClient() { ConnectionFactory factory = new ConnectionFactory() { HostName = "localhost" }; this.connection = factory.CreateConnection(); this.model = this.connection.CreateModel(); this.replyQueueName = this.model.QueueDeclare().QueueName; this.eventingBasicConsumer = new EventingBasicConsumer(this.model); this.basicProperties = this.model.CreateBasicProperties(); string correlationID = Guid.NewGuid().ToString(); this.basicProperties.CorrelationId = correlationID; this.basicProperties.ReplyTo = this.replyQueueName; this.eventingBasicConsumer.Received += (sender, e) => { byte[] responseMessageArray = e.Body; string responseMessage = Encoding.UTF8.GetString(responseMessageArray); if(e.BasicProperties.CorrelationId == correlationID) { blockingCollection.Add(responseMessage); } }; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 피보나치 수열 구하기 - GetFibonacciSequence(value) /// <summary> /// 피보나치 수열 구하기 /// </summary> /// <param name="value">값</param> /// <returns>피보나치 수열</returns> public long GetFibonacciSequence(int value) { string message = value.ToString(); byte[] messageByteArray = Encoding.UTF8.GetBytes(message); this.model.BasicPublish ( exchange : "", routingKey : "rpc_queue", basicProperties : this.basicProperties, body : messageByteArray ); this.model.BasicConsume ( consumer : eventingBasicConsumer, queue : this.replyQueueName, autoAck : true ); string responseMessage = blockingCollection.Take(); return Convert.ToInt64(responseMessage); } #endregion #region 닫기 - Close() /// <summary> /// 닫기 /// </summary> public void Close() { this.connection.Close(); } #endregion } } |
▶ Program.cs
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using System; namespace TestConsumer { /// <summary> /// 프로그램 /// </summary> class Program { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 프로그램 시작하기 - Main(argumentArray) /// <summary> /// 프로그램 시작하기 /// </summary> /// <param name="argumentArray">인자 배열</param> private static void Main(string[] argumentArray) { RPCClient client = new RPCClient(); WriteLog("30의 피보나치 수열 요청중..."); long result = client.GetFibonacciSequence(30); WriteLog("결과 : {0}", result); client.Close(); } #endregion #region 로그 작성하기 - WriteLog(format, parameterArray) /// <summary> /// 로그 작성하기 /// </summary> /// <param name="format">포맷 문자열</param> /// <param name="parameterArray">매개 변수 배열</param> private static void WriteLog(string format, params object[] parameterArray) { string message; if(parameterArray.Length == 0) { message = format; } else { message = string.Format(format, parameterArray); } string log = string.Format("[{0}] {1}", DateTime.Now.ToString("HH:mm:ss"), message); Console.WriteLine(log); } #endregion } } |
