Merge pull request 'Bazunov Andrew Lab 4' (#111) from bazunov_andrew_lab_4 into main

Reviewed-on: Alexey/DAS_2024_1#111

bazunov_andrew_lab_4/README.md

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+# Лабораторная работа №4: Работа с брокером сообщений (RabbitMQ)
+
+## Цель
+
+Изучение проектирования приложений с использованием брокера сообщений RabbitMQ.
+
+---
+
+## Задачи
+
+> 1. **Установить RabbitMQ**  
+     Установите RabbitMQ на локальный компьютер (или используйте Docker).
+>- [Скачивание RabbitMQ](https://www.rabbitmq.com/download.html)
+>- [Релизы RabbitMQ](https://github.com/rabbitmq/rabbitmq-server/releases/)
+>- **Пройти уроки RabbitMQ**
+>- Сделайте скриншоты, показывающие запуск `producer` и `consumer` и передачу сообщений.
+
+---
+## Первый урок
+> ![img.png](static/img1.png)
+
+---
+## Второй урок
+>![img.png](static/img2.png)
+>![img_1.png](static/img3.png)
+
+---
+## Третий урок
+> ![img.png](static/img4.png)
+
+---
+## Задача
+>![img.png](static/img5.png)
+> ![img.png](static/img.png)

bazunov_andrew_lab_4/docker-compose.yaml

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+version: "3.2"
+services:
+  rabbitmq:
+    image: rabbitmq:3-management-alpine
+    container_name: 'rabbitmq'
+    ports:
+        - "5672:5672"
+        - "15672:15672"
+    volumes:
+        - ~/.docker-conf/rabbitmq/data/:/var/lib/rabbitmq/
+        - ~/.docker-conf/rabbitmq/log/:/var/log/rabbitmq
+    networks:
+        - rabbitmq_go_net
+
+networks:
+  rabbitmq_go_net:
+    driver: bridge

bazunov_andrew_lab_4/example/vk_author.py

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+from datetime import datetime
+import random
+import threading
+
+import pika
+import sys
+
+_alphabet = [chr(i) for i in range(97, 123)]
+
+
+def run_every_n_seconds(seconds, action, *args):
+    threading.Timer(seconds, run_every_n_seconds, [seconds, action] + list(args)).start()
+    action(*args)
+
+
+def generate_message():
+    now = datetime.now()
+    current_time = now.strftime("%H:%M:%S")
+    return f"[{current_time}] " + "".join(random.choices(_alphabet, k=random.randint(1, 10)))
+
+
+def send_message(channel_local):
+    message = generate_message()
+    channel_local.basic_publish(
+        exchange='vk_messages',
+        routing_key='vk_messages',
+        body=message,
+        properties=pika.BasicProperties(
+            delivery_mode=pika.DeliveryMode.Persistent
+        ))
+    print(f"[vkAuthor] Sent {message}")
+
+
+def main(conn: pika.BlockingConnection):
+    channel = conn.channel()
+    channel.exchange_declare(exchange='vk_messages', exchange_type='fanout')
+    run_every_n_seconds(1, send_message, channel)
+
+
+if __name__ == '__main__':
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+
+    try:
+        main(connection)
+    except KeyboardInterrupt:
+        connection.close()
+        sys.exit(0)

bazunov_andrew_lab_4/example/vk_reader.py

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+import sys
+from datetime import datetime
+
+import pika
+
+_QUEUE_NAME = "vk_messages_queue"
+_EXCHANGE_NAME = "vk_messages"
+
+
+def main():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+
+    channel.exchange_declare(
+        exchange=_EXCHANGE_NAME,
+        exchange_type='fanout'
+    )
+
+    channel.queue_declare(queue=_QUEUE_NAME, exclusive=True)
+    channel.queue_bind(exchange=_EXCHANGE_NAME, queue=_QUEUE_NAME)
+
+    def callback(ch, method, properties, body):
+        now = datetime.now()
+        current_time = now.strftime("%H:%M:%S")
+
+        print(f"[vkReader] Received [{str(body)}] in [{current_time}]")
+        ch.basic_ack(delivery_tag=method.delivery_tag)
+
+    channel.basic_consume(
+        queue=_QUEUE_NAME,
+        on_message_callback=callback,
+        auto_ack=False
+    )
+
+    print('[*] Waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('Interrupted')
+        sys.exit(0)

bazunov_andrew_lab_4/example/vk_slow_reader.py

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+import time
+import random
+from datetime import datetime
+
+import pika
+import sys
+
+_QUEUE_NAME = "vk_messages_queue_slow"
+_EXCHANGE_NAME = "vk_messages"
+
+
+def main():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+
+    channel.exchange_declare(
+        exchange=_EXCHANGE_NAME,
+        exchange_type='fanout'
+    )
+    channel.queue_declare(queue=_QUEUE_NAME, exclusive=True)
+    channel.queue_bind(exchange=_EXCHANGE_NAME, queue=_QUEUE_NAME)
+
+    def callback(ch, method, properties, body):
+        now = datetime.now()
+        current_time = now.strftime("%H:%M:%S")
+
+        print(f"[vkSlowReader] Received [{str(body)}] in [{current_time}]")
+        read_time = random.randint(2, 5)
+        time.sleep(read_time)
+        ch.basic_ack(delivery_tag=method.delivery_tag)
+
+    channel.basic_consume(
+        queue=_QUEUE_NAME,
+        on_message_callback=callback,
+        auto_ack=False
+    )
+
+    print('[*] Waiting for messages. To exit press CTRL+C')
+    channel.start_consuming()
+
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('Interrupted')
+        sys.exit(0)

bazunov_andrew_lab_4/first/receive.py

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+import pika
+import sys
+
+
+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')
+        sys.exit(0)

bazunov_andrew_lab_4/first/send.py

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+import pika
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='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()

bazunov_andrew_lab_4/second/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()

bazunov_andrew_lab_4/second/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()

bazunov_andrew_lab_4/third/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()

bazunov_andrew_lab_4/third/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()