fix

tasks/mutriskov-ds/lab_4/MainTask/Consumer-1/Program.cs

@@ -6,31 +6,29 @@ var factory = new ConnectionFactory { HostName = "localhost" };
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-channel.ExchangeDeclare(exchange: "reports", type: ExchangeType.Fanout);
+Random rand = new Random();
+string queueName = $"queue1";
 
-channel.QueueDeclare("queue1");
+channel.QueueDeclare(queue: queueName);
-channel.QueueBind(queue: "queue1",
+channel.QueueBind(queue: queueName,
     exchange: "reports",
     routingKey: string.Empty);
 
-Console.WriteLine(" [*] Ожидание сообщения");
+Console.WriteLine(" [*] Waiting for messages.");
 
 var consumer = new EventingBasicConsumer(channel);
-consumer.Received += (model, ea) =>
+consumer.Received += async (model, ea) =>
 {
     byte[] body = ea.Body.ToArray();
     var message = Encoding.UTF8.GetString(body);
 
-    Thread.Sleep(2500);
-
     var reportNumber = message.Split('#')[1];
     Console.WriteLine($" [x] Отчет #{reportNumber} создан.");
-
     channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
 };
-channel.BasicConsume(queue: "queue1",
+channel.BasicConsume(queue: queueName,
-                     autoAck: true,
+    autoAck: false,
     consumer: consumer);
 
-Console.WriteLine(" Нажмите [enter] чтобы выйти.");
+Console.WriteLine(" Press [enter] to exit.");
 Console.ReadLine();

tasks/mutriskov-ds/lab_4/MainTask/Consumer-2/Program.cs

@@ -6,27 +6,30 @@ var factory = new ConnectionFactory { HostName = "localhost" };
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-channel.QueueDeclare("queue2");
+Random rand = new Random();
-channel.QueueBind(queue: "queue2",
+string queueName = $"queue{rand.Next()}";
+
+channel.QueueDeclare(queue: queueName);
+channel.QueueBind(queue: queueName,
     exchange: "reports",
     routingKey: string.Empty);
 
-Console.WriteLine(" [*] Ожидание сообщения");
+Console.WriteLine(" [*] Waiting for messages.");
 
 var consumer = new EventingBasicConsumer(channel);
-consumer.Received += (model, ea) =>
+consumer.Received += async (model, ea) =>
 {
     byte[] body = ea.Body.ToArray();
     var message = Encoding.UTF8.GetString(body);
 
     var reportNumber = message.Split('#')[1];
+    Thread.Sleep(2500);
     Console.WriteLine($" [x] Отчет #{reportNumber} создан.");
-
     channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
 };
-channel.BasicConsume(queue: "queue2",
+channel.BasicConsume(queue: queueName,
-                     autoAck: true,
+    autoAck: false,
     consumer: consumer);
 
-Console.WriteLine(" Нажмите [enter] чтобы выйти.");
+Console.WriteLine(" Press [enter] to exit.");
 Console.ReadLine();

tasks/mutriskov-ds/lab_4/MainTask/Publisher/Program.cs

@@ -5,17 +5,21 @@ var factory = new ConnectionFactory { HostName = "localhost" };
 using var connection = factory.CreateConnection();
 using var channel = connection.CreateModel();
 
-channel.ExchangeDeclare("reports", ExchangeType.Fanout);
+channel.ExchangeDeclare(exchange: "reports", type: ExchangeType.Fanout);
-
+Random rand = new Random();
-var rand = new Random();
+foreach (var item in Enumerable.Range(0, 1000))
-
-while (true)
 {
     var message = $"Необходимо создать отчет #{rand.Next()}";
+
     var body = Encoding.UTF8.GetBytes(message);
+    channel.BasicPublish(exchange: "reports",
+            routingKey: string.Empty,
+            basicProperties: null,
+            body: body);
 
-    channel.BasicPublish("reports", string.Empty, null, body);
+    Console.WriteLine($" [x] Поступила работа {message}");
-    Console.WriteLine($" [x] Отправлено \"{message}\"");
+    await Task.Delay(1000);
-
-    Thread.Sleep(1000);
 }
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/mutriskov-ds/lab_4/README.md

@@ -0,0 +1,149 @@
+# Отчет по лабораторной работе №4
+
+Выполнил студент гр. ИСЭбд-41 Мутрисков Д.С.
+
+## Прохождение tutorial
+
+Установил rabbitMQ server, erlang и зашел в брокер под гостем по http://localhost:15672/#/ 
+
+Туториал 1:
+
+![](images/tut1.png)
+
+Туториал 2:
+
+![](images/tut2.png)
+
+Туториал 3:
+
+![](images/tut3.png)
+
+## Разработка демонстрационных приложений
+
+Предметная область: Офис. Производитель - начальник, который посылает задачу на составление отчета, Потребители - работники офиса.
+
+1. Publisher
+
+```cs
+using System.Text;
+using RabbitMQ.Client;
+
+var factory = new ConnectionFactory { HostName = "localhost" };
+using var connection = factory.CreateConnection();
+using var channel = connection.CreateModel();
+
+channel.ExchangeDeclare(exchange: "reports", type: ExchangeType.Fanout);
+Random rand = new Random();
+foreach (var item in Enumerable.Range(0, 1000))
+{
+    var message = $"Необходимо создать отчет #{rand.Next()}";
+
+    var body = Encoding.UTF8.GetBytes(message);
+    channel.BasicPublish(exchange: "reports",
+            routingKey: string.Empty,
+            basicProperties: null,
+            body: body);
+
+    Console.WriteLine($" [x] Поступила работа {message}");
+    await Task.Delay(1000);
+}
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+
+```
+
+2. Consumer 1.
+
+```cs
+using System.Text;
+using RabbitMQ.Client;
+using RabbitMQ.Client.Events;
+
+var factory = new ConnectionFactory { HostName = "localhost" };
+using var connection = factory.CreateConnection();
+using var channel = connection.CreateModel();
+
+Random rand = new Random();
+string queueName = $"queue1";
+
+channel.QueueDeclare(queue: queueName);
+channel.QueueBind(queue: queueName,
+    exchange: "reports",
+    routingKey: string.Empty);
+
+Console.WriteLine(" [*] Waiting for messages.");
+
+var consumer = new EventingBasicConsumer(channel);
+consumer.Received += async (model, ea) =>
+{
+    byte[] body = ea.Body.ToArray();
+    var message = Encoding.UTF8.GetString(body);
+
+    var reportNumber = message.Split('#')[1];
+    Console.WriteLine($" [x] Отчет #{reportNumber} создан.");
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: queueName,
+    autoAck: false,
+    consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+```
+
+3. Consumer 2.
+
+```cs
+using System.Text;
+using RabbitMQ.Client;
+using RabbitMQ.Client.Events;
+
+var factory = new ConnectionFactory { HostName = "localhost" };
+using var connection = factory.CreateConnection();
+using var channel = connection.CreateModel();
+
+Random rand = new Random();
+string queueName = $"queue{rand.Next()}";
+
+channel.QueueDeclare(queue: queueName);
+channel.QueueBind(queue: queueName,
+    exchange: "reports",
+    routingKey: string.Empty);
+
+Console.WriteLine(" [*] Waiting for messages.");
+
+var consumer = new EventingBasicConsumer(channel);
+consumer.Received += async (model, ea) =>
+{
+    byte[] body = ea.Body.ToArray();
+    var message = Encoding.UTF8.GetString(body);
+
+    var reportNumber = message.Split('#')[1];
+    Thread.Sleep(2500);
+    Console.WriteLine($" [x] Отчет #{reportNumber} создан.");
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: queueName,
+    autoAck: false,
+    consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+```
+
+## Результаты выполнения лабораторной работы
+
+Выполнение с одним потребителем с задержкой в выполении работы.
+
+![](images/c1-1.png)
+
+Очередь с работником без задержки в выполенении работы обрабатывается моментально и несет минимальную нагрузку.
+Очередь работника с задержкой в выполении работы довольно быстро загружается.
+
+Пример с двумя потребителями-курьерами
+
+![](images/c1-2.png)
+
+Очередь самовывоза не изменилась.
+На очереди курьеров закономерно тратится в 2 раза больше времени