Merge pull request '[Л/Р 4] Халитова Ангелина' (#115) from angelina/distributed-computing:khalitova-am-lab-4 into main

Reviewed-on: http://student.git.athene.tech/v.moiseev/distributed-computing/pulls/115

tasks/khalitova-am/lab_4/.gitignore

@@ -0,0 +1,456 @@
+var/result/ 
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tasks/khalitova-am/lab_4/README.md

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+# Отчёт по лабораторной работе №4
+## Работа с брокером сообщений
+
+Выполнила: студентка гр. ИСЭбд-41 Халитова А.М.
+
+## Установка брокера сообщений RabbitMQ
+Была выполнена установка RabbitMQ и Erlang:
+![](shots/shot1.PNG)
+![](shots/shot2.PNG) 
+
+И выполнен вход на http://localhost:15672/ в качестве гостя:
+![](shots/shot3.PNG)
+
+## Прохождение tutorial
+
+tutorial1:
+![](shots/shot4.PNG)
+![](shots/shot5.PNG) 
+![](shots/shot6.PNG)
+
+tutorial2:
+![](shots/shot7.PNG)
+![](shots/shot8.PNG) 
+![](shots/shot9.PNG)
+![](shots/shot10.PNG)
+
+tutorial3:
+![](shots/shot11.PNG) 
+![](shots/shot12.PNG)
+![](shots/shot13.PNG)
+
+## Разработка демонстрационных приложений
+
+Предметная область - заказ работ на исполнение. Производитель - заказчик работ. Потребитель 1 - исполнитель принимает заказ и выполняет работу. Потребитель 2 - исполнитель откладывает выполнение задачи.
+
+1. Publisher:
+```
+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: "job", type: ExchangeType.Fanout);
+Random rand = new Random();
+foreach (var item in Enumerable.Range(0, 1000))
+{
+    var message = rand.Next().ToString();
+
+    var body = Encoding.UTF8.GetBytes(message);
+    channel.BasicPublish(exchange: "job",
+            routingKey: string.Empty,
+            basicProperties: null,
+            body: body);
+
+    Console.WriteLine($" [x] Поступила работа {message}");
+    await Task.Delay(500);
+}
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+
+static string GetMessage(string[] args)
+{
+    return ((args.Length > 0) ? string.Join(" ", args) : "info: Принято!");
+}
+```
+2. Consumer 1:
+```
+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();
+
+channel.QueueDeclare(queue: "accepted");
+channel.QueueBind(queue: "accepted",
+    exchange: "job",
+    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);
+
+    string outputText = $"Работа принята к исполнению {message}";
+    Console.WriteLine($" [x] Done. {outputText}");
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: "accepted",
+    autoAck: false,
+    consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+```
+
+3. Consumer 3:
+```
+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 = $"denied{rand.Next()}";
+
+channel.QueueDeclare(queue: queueName);
+channel.QueueBind(queue: queueName,
+    exchange: "job",
+    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);
+
+    int waitTime = rand.Next(20, 90);
+    Thread.Sleep(waitTime * 100);
+
+    string outputText = $"Работа отложена {message} на {waitTime} минут";
+    Console.WriteLine($" [x] Done. {outputText}");
+    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 работ
+
+Запуск каждой программы по одному экземпляру:
+![](shots/shot14.PNG) 
+![](shots/shot15.PNG)
+![](shots/shot16.PNG)
+
+Результаты обработки:
+![](shots/shot17.PNG)
+![](shots/shot18.PNG)
+
+Потребителю один соответствует очередь accepted, а потребителю два - очередь denied. Как видно, первый потребитель работает без задержки, а очередь второго потребителя переполенена. Из этого следует, что скорость первого в разы выше, и он потребляет намного меньше памяти за счет постоянно пустой очереди.
+
+Запуск двух экземпляров потребителя два и по одному экземпляру потребителя один и заказчика: 
+![](shots/shot19.PNG)
+![](shots/shot20.PNG)
+
+Ситуация в очередью потребителя один не изменилась, а экземпляры потребителя два теперь затрачивают в 2 раза больше времени и памяти, их очереди так же переполнены, как и в ситуации выше.

tasks/khalitova-am/lab_4/demoApp/Consumer1/Consumer1.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ" Version="3.6.2" />
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/demoApp/Consumer1/Program.cs

@@ -0,0 +1,31 @@
+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();
+
+channel.QueueDeclare(queue: "accepted");
+channel.QueueBind(queue: "accepted",
+    exchange: "job",
+    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);
+
+    string outputText = $"Работа принята к исполнению {message}";
+    Console.WriteLine($" [x] Done. {outputText}");
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: "accepted",
+    autoAck: false,
+    consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/khalitova-am/lab_4/demoApp/Consumer2/Consumer2.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ" Version="3.6.2" />
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/demoApp/Consumer2/Program.cs

@@ -0,0 +1,37 @@
+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 = $"denied{rand.Next()}";
+
+channel.QueueDeclare(queue: queueName);
+channel.QueueBind(queue: queueName,
+    exchange: "job",
+    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);
+
+    int waitTime = rand.Next(20, 90);
+    Thread.Sleep(waitTime * 100);
+
+    string outputText = $"Работа отложена {message} на {waitTime} минут";
+    Console.WriteLine($" [x] Done. {outputText}");
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: queueName,
+    autoAck: false,
+    consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/khalitova-am/lab_4/demoApp/Publisher/Program.cs

@@ -0,0 +1,30 @@
+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: "job", type: ExchangeType.Fanout);
+Random rand = new Random();
+foreach (var item in Enumerable.Range(0, 1000))
+{
+    var message = rand.Next().ToString();
+
+    var body = Encoding.UTF8.GetBytes(message);
+    channel.BasicPublish(exchange: "job",
+            routingKey: string.Empty,
+            basicProperties: null,
+            body: body);
+
+    Console.WriteLine($" [x] Поступила работа {message}");
+    await Task.Delay(500);
+}
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+
+static string GetMessage(string[] args)
+{
+    return ((args.Length > 0) ? string.Join(" ", args) : "info: Принято!");
+}

tasks/khalitova-am/lab_4/demoApp/Publisher/Publisher.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ" Version="3.6.2" />
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial1/Receive/Receive.cs

@@ -0,0 +1,29 @@
+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();
+
+channel.QueueDeclare(queue: "hello",
+                     durable: false,
+                     exclusive: false,
+                     autoDelete: false,
+                     arguments: null);
+
+Console.WriteLine(" [*] Waiting for messages.");
+
+var consumer = new EventingBasicConsumer(channel);
+consumer.Received += (model, ea) =>
+{
+    var body = ea.Body.ToArray();
+    var message = Encoding.UTF8.GetString(body);
+    Console.WriteLine($" [x] Received {message}");
+};
+channel.BasicConsume(queue: "hello",
+                     autoAck: true,
+                     consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();                     

tasks/khalitova-am/lab_4/tutorial1/Receive/Receive.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial1/Send/Send.cs

@@ -0,0 +1,24 @@
+using System.Text;
+using RabbitMQ.Client;
+
+var factory = new ConnectionFactory { HostName = "localhost" };
+using var connection = factory.CreateConnection();
+using var channel = connection.CreateModel();
+
+channel.QueueDeclare(queue: "hello",
+                     durable: false,
+                     exclusive: false,
+                     autoDelete: false,
+                     arguments: null);
+
+const string message = "Hello World! This is the first tutorial!";
+var body = Encoding.UTF8.GetBytes(message);
+
+channel.BasicPublish(exchange: string.Empty,
+                     routingKey: "hello",
+                     basicProperties: null,
+                     body: body);
+Console.WriteLine($" [x] Sent {message}");
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/khalitova-am/lab_4/tutorial1/Send/Send.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial2/NewTask/NewTask.cs

@@ -0,0 +1,32 @@
+using System.Text;
+using RabbitMQ.Client;
+
+var factory = new ConnectionFactory { HostName = "localhost" };
+using var connection = factory.CreateConnection();
+using var channel = connection.CreateModel();
+
+channel.QueueDeclare(queue: "task_queue",
+                     durable: true,
+                     exclusive: false,
+                     autoDelete: false,
+                     arguments: null);
+
+var message = GetMessage(args);
+var body = Encoding.UTF8.GetBytes(message);
+
+var properties = channel.CreateBasicProperties();
+properties.Persistent = true;
+
+channel.BasicPublish(exchange: string.Empty,
+                     routingKey: "task_queue",
+                     basicProperties: properties,
+                     body: body);
+Console.WriteLine($" [x] Sent {message}");
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+
+static string GetMessage(string[] args)
+{
+    return ((args.Length > 0) ? string.Join(" ", args) : "Это туториал номер два");
+}

tasks/khalitova-am/lab_4/tutorial2/NewTask/NewTask.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial2/Worker/Worker.cs

@@ -0,0 +1,38 @@
+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();
+
+channel.QueueDeclare(queue: "task_queue",
+                     durable: true,
+                     exclusive: false,
+                     autoDelete: false,
+                     arguments: null);
+
+channel.BasicQos(prefetchSize: 0, prefetchCount: 1, global: false);
+
+Console.WriteLine(" [*] Waiting for messages.");
+
+var consumer = new EventingBasicConsumer(channel);
+consumer.Received += (model, ea) =>
+{
+    byte[] body = ea.Body.ToArray();
+    var message = Encoding.UTF8.GetString(body);
+    Console.WriteLine($" [x] Received {message}");
+
+    int dots = message.Split('.').Length - 1;
+    Thread.Sleep(dots * 1000);
+
+    Console.WriteLine(" [x] Done");
+
+    channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+};
+channel.BasicConsume(queue: "task_queue",
+                     autoAck: false,
+                     consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/khalitova-am/lab_4/tutorial2/Worker/Worker.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.8.1" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial3/EmitLogs/EmitLogs.cs

@@ -0,0 +1,24 @@
+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: "logs", type: ExchangeType.Fanout);
+
+var message = GetMessage(args);
+var body = Encoding.UTF8.GetBytes(message);
+channel.BasicPublish(exchange: "logs",
+                     routingKey: string.Empty,
+                     basicProperties: null,
+                     body: body);
+Console.WriteLine($" [x] Sent {message}");
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();
+
+static string GetMessage(string[] args)
+{
+    return ((args.Length > 0) ? string.Join(" ", args) : "info: Это третий туториал");
+}

tasks/khalitova-am/lab_4/tutorial3/EmitLogs/EmitLogs.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <OutputType>Exe</OutputType>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.4.0" />
+  </ItemGroup>
+
+</Project>

tasks/khalitova-am/lab_4/tutorial3/ReceiveLogs/ReceiveLogs.cs

@@ -0,0 +1,31 @@
+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();
+
+channel.ExchangeDeclare(exchange: "logs", type: ExchangeType.Fanout);
+
+// declare a server-named queue
+var queueName = channel.QueueDeclare().QueueName;
+channel.QueueBind(queue: queueName,
+                  exchange: "logs",
+                  routingKey: string.Empty);
+
+Console.WriteLine(" [*] Waiting for logs.");
+
+var consumer = new EventingBasicConsumer(channel);
+consumer.Received += (model, ea) =>
+{
+    byte[] body = ea.Body.ToArray();
+    var message = Encoding.UTF8.GetString(body);
+    Console.WriteLine($" [x] {message}");
+};
+channel.BasicConsume(queue: queueName,
+                     autoAck: true,
+                     consumer: consumer);
+
+Console.WriteLine(" Press [enter] to exit.");
+Console.ReadLine();

tasks/khalitova-am/lab_4/tutorial3/ReceiveLogs/ReceiveLogs.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <OutputType>Exe</OutputType>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>   
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="RabbitMQ.Client" Version="6.4.0" />
+  </ItemGroup>
+
+</Project>