minhasapov_ruslan_lab_4/README.md

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+# Лабораторная работа №4
+#### ПИбд-42. Минхасапов Руслан.
+
+---
+
+#### Туториал
+
+- Первый
+![Скриншот 1](./pictures/tutor_1.png)
+
+- Второй
+![Скриншот 2](./pictures/tutor_2.png)
+
+- Третий
+![Скриншот 3](./pictures/tutor_3.png)
+
+---
+
+#### Выполнение лабораторной работы
+
+Выбранная предметная область: Мониторинг серверов
+
+Сначала запустим продюсера и 1/2 консьюмера.
+
+Результат:
+![Скриншот 4](./pictures/lab_con1&2.png)
+
+Вывод:
+Так как скорость поступления сообщений в очередь первого консьюмера больше, чем скорость его обработки сообщений - очередь довольно быстро переполняется.
+Второй же консьюмер моментально обрабатывает входящие сообщения, из-за чего его очередь никогда не заполняется.
+
+Теперь запустим сначала один экземпляр первого консьюмера, а потом несколько, чтобы они разгрузили накопившуюся очередь.
+
+Результат:
+![Скриншот 5](./pictures/lab_con1&many.png)
+
+Вывод:
+Накопившаяся очередь постепенно разгружается благодаря нескольким одновременно запущенным экземплярам первого консьюмера.
+
+---
+
+#### Демонстрация работы
+
+Видео по [ссылке](https://disk.yandex.ru/i/zlf_9UFCmSEQgQ)

minhasapov_ruslan_lab_4/labwork/consumer_1.py

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+import pika
+import time
+
+
+def callback(ch, method, properties, body):
+    print(f"[x] Consumer 1 received: {body.decode()}")
+
+    time.sleep(3)
+
+    print(f"[x] Consumer 1 processed:: {body.decode()}")
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+
+def consume():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672))
+
+    channel = connection.channel()
+
+    channel.queue_declare(queue='consumer_1_queue')
+    channel.queue_bind(exchange='server_monitoring', queue='consumer_1_queue')
+
+    channel.basic_consume(queue='consumer_1_queue', on_message_callback=callback)
+
+    print(' [*] Consumer 1 waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+if __name__ == "__main__":
+    consume()

minhasapov_ruslan_lab_4/labwork/consumer_2.py

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+import pika
+
+
+def callback(ch, method, properties, body):
+    print(f"[x] Consumer 2 received: {body.decode()}")
+
+    print(f"[x] Consumer 2 processed:: {body.decode()}")
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+
+def consume():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672))
+
+    channel = connection.channel()
+
+    channel.queue_declare(queue='consumer_2_queue')
+    channel.queue_bind(exchange='server_monitoring', queue='consumer_2_queue')
+
+    channel.basic_consume(queue='consumer_2_queue', on_message_callback=callback)
+
+    print(' [*] Consumer 2 waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+
+if __name__ == "__main__":
+    consume()

minhasapov_ruslan_lab_4/labwork/publisher.py

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+import pika
+import time
+import random
+
+def generage_message_metrics():
+    return f" | CPU: {random.randint(0, 100)}% | RAM: {random.randint(0, 100)}% | CD: {random.randint(0, 100)}% |"
+
+def produce():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672))
+    channel = connection.channel()
+
+    channel.exchange_declare(exchange='server_monitoring', exchange_type='fanout')
+
+    messages = [
+        "Server | ID: 1",
+        "Server | ID: 2",
+        "Server | ID: 3",
+    ]
+        
+    while True:
+        for message in messages:
+            message_with_metric = message + generage_message_metrics()
+            channel.basic_publish(exchange='server_monitoring', routing_key='', body=message_with_metric)
+            print(f"[x] Sent: {message_with_metric}")
+            time.sleep(1)
+
+if __name__ == "__main__":
+    produce()

minhasapov_ruslan_lab_4/tutor_1/receiver.py

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+import os
+import sys
+import pika
+
+
+def main():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+
+    channel.queue_declare(queue='hello')
+
+    def callback(ch, method, properties, body):
+        print(f" [x] Received {body}")
+
+    channel.basic_consume(queue='hello', on_message_callback=callback, auto_ack=True)
+
+    print(' [*] Waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('Interrupted')
+        try:
+            sys.exit(0)
+        except SystemExit:
+            os._exit(0)

minhasapov_ruslan_lab_4/tutor_1/send.py

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+import pika
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='hello')
+
+channel.basic_publish(exchange='',
+                      routing_key='hello',
+                      body='Hello World!')
+print(" [x] Sent 'Hello World!'")
+
+connection.close()

minhasapov_ruslan_lab_4/tutor_2/new_task.py

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+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='task_queue', durable=True)
+
+message = ' '.join(sys.argv[1:]) or "Hello World!"
+channel.basic_publish(
+    exchange='',
+    routing_key='task_queue',
+    body=message,
+    properties=pika.BasicProperties(
+        delivery_mode=pika.DeliveryMode.Persistent
+    ))
+print(f" [x] Sent {message}")
+connection.close()

minhasapov_ruslan_lab_4/tutor_2/worker.py

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+import pika
+import time
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='task_queue', durable=True)
+print(' [*] Waiting for messages. To exit press CTRL+C')
+
+
+def callback(ch, method, properties, body):
+    print(f" [x] Received {body.decode()}")
+    time.sleep(body.count(b'.'))
+    print(" [x] Done")
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+
+channel.basic_qos(prefetch_count=1)
+channel.basic_consume(queue='task_queue', on_message_callback=callback)
+
+channel.start_consuming()

minhasapov_ruslan_lab_4/tutor_3/emit_log.py

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+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
+
+message = ' '.join(sys.argv[1:]) or "info: Hello World!"
+channel.basic_publish(exchange='logs', routing_key='', body=message)
+print(f" [x] Sent {message}")
+connection.close()

minhasapov_ruslan_lab_4/tutor_3/receive_logs.py

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+import pika
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='logs', exchange_type='fanout')
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='logs', queue=queue_name)
+
+print(' [*] Waiting for logs. To exit press CTRL+C')
+
+def callback(ch, method, properties, body):
+    print(f" [x] {body}")
+
+channel.basic_consume(
+    queue=queue_name, on_message_callback=callback, auto_ack=True)
+
+channel.start_consuming()