Merge pull request 'pupkov_alexey_lab4 is ready' (#196) from pupkov_alexey_lab_4 into main
Reviewed-on: Alexey/DAS_2024_1#196
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pupkov_alexey_lab_4/Consumer_1.py
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import pika
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import time
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# Настройка соединения
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connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
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channel = connection.channel()
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# Создание очереди с фиксированным именем
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queue_name = 'orders_slow'
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channel.queue_declare(queue=queue_name)
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# Binding очереди с exchange
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channel.queue_bind(exchange='orders_exchange', queue=queue_name)
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# Callback для обработки сообщений
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def callback(ch, method, properties, body):
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print(f"[Consumer 1] Получено: {body.decode()}")
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time.sleep(3) # Эмуляция долгой обработки
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print(f"[Consumer 1] Обработано: {body.decode()}")
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ch.basic_ack(delivery_tag=method.delivery_tag)
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channel.basic_consume(queue=queue_name, on_message_callback=callback)
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print("[Consumer 1] Ожидание сообщений...")
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channel.start_consuming()
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pupkov_alexey_lab_4/Consumer_2.py
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import pika
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# Настройка соединения
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connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
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channel = connection.channel()
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# Создание очереди с фиксированным именем
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queue_name = 'orders_fast'
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channel.queue_declare(queue=queue_name)
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# Binding очереди с exchange
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channel.queue_bind(exchange='orders_exchange', queue=queue_name)
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# Callback для обработки сообщений
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def callback(ch, method, properties, body):
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print(f"[Consumer 2] Получено и обработано: {body.decode()}")
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ch.basic_ack(delivery_tag=method.delivery_tag)
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channel.basic_consume(queue=queue_name, on_message_callback=callback)
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print("[Consumer 2] Ожидание сообщений...")
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channel.start_consuming()
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pupkov_alexey_lab_4/Publisher.py
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import pika
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import time
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import random
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# Настройка соединения
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connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
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channel = connection.channel()
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# Создание exchange типа fanout
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channel.exchange_declare(exchange='orders_exchange', exchange_type='fanout')
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# Генератор случайных заказов
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orders = ["пицца Маргарита", "паста Карбонара", "тирамису"]
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while True:
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order = f"Поступил заказ: {random.choice(orders)}"
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channel.basic_publish(exchange='orders_exchange', routing_key='', body=order)
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print(f"[Publisher] Отправлено: {order}")
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time.sleep(1)
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# Закрытие соединения (в реальной реализации стоит предусмотреть graceful shutdown)
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connection.close()
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pupkov_alexey_lab_4/README.md
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### Лабораторная работа №4 - Работа с брокером сообщений
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#### Задание
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1. Установить брокер сообщений RabbitMQ.
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2. Пройти уроки 1, 2 и 3 из RabbitMQ Tutorials на любом языке программирования.
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3. Продемонстрировать работу брокера сообщений.
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#### Описание работы программы:
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- Класс Publisher успешно осуществляет отправку сообщений своим клиентам.
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- Класс Consumer1 принимает и обрабатывает сообщения с задержкой в 3 секунды, что можно заметить на видео.
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- Класс Consumer2 мгновенно принимает и обрабатывает сообщения.
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#### Уроки
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1. lesson_1
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
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2. lesson_2
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
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3. lesson_3
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
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## Показания очереди orders_slow при одном запущенном экземпляре Consumer_1
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
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## Показания очереди orders_fast
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
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## Показания очереди orders_slow при двух запущенных экземплярах Consumer_1
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
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## Показания очереди orders_slow при трех запущенных экземплярах Consumer_1
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
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## Видео ВК
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[Ссылка на демонстрацию работы программы](https://vk.com/video547368103_456239602?list=ln-pQzNJDPgjODeUIgNca)
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pupkov_alexey_lab_4/img.jpg
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pupkov_alexey_lab_4/img_1.jpg
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pupkov_alexey_lab_4/img_2.jpg
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pupkov_alexey_lab_4/img_4.jpg
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pupkov_alexey_lab_4/lesson_1.jpg
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pupkov_alexey_lab_4/lesson_1/receive.py
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import pika, sys, os
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def main():
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.queue_declare(queue='hello')
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def callback(ch, method, properties, body):
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print(f" [x] Received {body}")
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channel.basic_consume(queue='hello', on_message_callback=callback, auto_ack=True)
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print(' [*] Waiting for messages. To exit press CTRL+C')
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channel.start_consuming()
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if __name__ == '__main__':
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try:
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main()
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except KeyboardInterrupt:
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print('Interrupted')
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try:
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sys.exit(0)
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except SystemExit:
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os._exit(0)
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pupkov_alexey_lab_4/lesson_1/send.py
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import pika
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.queue_declare(queue='hello')
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channel.basic_publish(exchange='', routing_key='hello', body='Hello World!')
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print(" [x] Sent 'Hello World!'")
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connection.close()
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pupkov_alexey_lab_4/lesson_2.jpg
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pupkov_alexey_lab_4/lesson_2/new_task.py
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import pika
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import sys
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.queue_declare(queue='task_queue', durable=True)
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message = ' '.join(sys.argv[1:]) or "Hello World!"
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channel.basic_publish(
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exchange='',
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routing_key='task_queue',
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body=message,
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properties=pika.BasicProperties(
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delivery_mode=pika.DeliveryMode.Persistent
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))
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print(f" [x] Sent {message}")
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connection.close()
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pupkov_alexey_lab_4/lesson_2/worker.py
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#!/usr/bin/env python
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import pika
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import time
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.queue_declare(queue='task_queue', durable=True)
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print(' [*] Waiting for messages. To exit press CTRL+C')
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def callback(ch, method, properties, body):
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print(f" [x] Received {body.decode()}")
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time.sleep(body.count(b'.'))
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print(" [x] Done")
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ch.basic_ack(delivery_tag=method.delivery_tag)
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channel.basic_qos(prefetch_count=1)
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channel.basic_consume(queue='task_queue', on_message_callback=callback)
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channel.start_consuming()
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pupkov_alexey_lab_4/lesson_3.jpg
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After Width: | Height: | Size: 30 KiB |
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pupkov_alexey_lab_4/lesson_3/emit_log.py
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import pika
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import sys
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.exchange_declare(exchange='logs', exchange_type='fanout')
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message = ' '.join(sys.argv[1:]) or "info: Hello World!"
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channel.basic_publish(exchange='logs', routing_key='', body=message)
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print(f" [x] Sent {message}")
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connection.close()
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pupkov_alexey_lab_4/lesson_3/receive_log.py
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import pika
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connection = pika.BlockingConnection(
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pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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channel.exchange_declare(exchange='logs', exchange_type='fanout')
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result = channel.queue_declare(queue='', exclusive=True)
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queue_name = result.method.queue
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channel.queue_bind(exchange='logs', queue=queue_name)
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print(' [*] Waiting for logs. To exit press CTRL+C')
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def callback(ch, method, properties, body):
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print(f" [x] {body}")
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channel.basic_consume(
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queue=queue_name, on_message_callback=callback, auto_ack=True)
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channel.start_consuming()
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