Merge pull request 'tsukanova_irina_lab_4' (#64) from tsukanova_irina_lab_4 into main
Reviewed-on: #64
28
tsukanova_irina_lab_4/Consumer_1.py
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import random
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import time
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import pika
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queue_name = 'queue_1'
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exchange = 'logs'
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def callback(ch, method, properties, body):
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print(f" [Consumer_1] - получено сообщение - {body.decode()}")
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time.sleep(random.choice([2, 3]))
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print(f" [Consumer_1] - сообщение обработано")
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print()
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ch.basic_ack(delivery_tag=method.delivery_tag)
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if __name__ == '__main__':
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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try:
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# своя не анонимная очередь
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channel.queue_declare(queue=queue_name)
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# binding на exchange
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channel.queue_bind(exchange=exchange, queue=queue_name)
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channel.basic_consume(queue=queue_name, on_message_callback=callback)
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channel.start_consuming()
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except KeyboardInterrupt:
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connection.close()
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25
tsukanova_irina_lab_4/Consumer_2.py
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import pika
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queue_name = 'queue_2'
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exchange = 'logs'
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def callback(ch, method, properties, body):
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print(f" [Consumer_2] - получено сообщение - {body.decode()}")
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print(f" [Consumer_2] - сообщение обработано")
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print()
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ch.basic_ack(delivery_tag=method.delivery_tag)
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if __name__ == '__main__':
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connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
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channel = connection.channel()
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try:
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# своя не анонимная очередь
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channel.queue_declare(queue=queue_name)
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# binding на exchange
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channel.queue_bind(exchange=exchange, queue=queue_name)
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channel.basic_consume(queue=queue_name, on_message_callback=callback)
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channel.start_consuming()
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except KeyboardInterrupt:
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connection.close()
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18
tsukanova_irina_lab_4/Publisher.py
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import random
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import time
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import pika
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if __name__ == '__main__':
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connection = pika.BlockingConnection(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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try:
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while True:
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message = random.choice(["SIGABRT", "SIGALRM", "SIGKILL", "SIGSTOP", "SIGTERM", "SIGINT", "SIGQUIT"])
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channel.basic_publish(exchange='logs', routing_key='', body=message)
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time.sleep(1)
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except KeyboardInterrupt:
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connection.close()
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39
tsukanova_irina_lab_4/README.md
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# Цуканова Ирина ПИбд-42
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# Лабораторная работа №4 - Работа с брокером сообщений
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## Предметная область:
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Сигналы в операционных системах семейства Unix
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## Прохождение tutorial:
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- Прохождение первого урока:
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![изображение 1](./images/t_1.png)
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- Прохождение второго урока:
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![изображение 2](./images/t_2.png)
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- Прохождение третьего урока:
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![изображение 3](./images/t_3.png)
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## Данные из RabbitMQ Management UI:
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#### 1. Показания очереди queue_1 при одном запущенном экземпляре Consumer_1
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![изображение 1](./images/q_1_one_comsumer_1.jpg)
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#### 2. Показания очереди queue_2
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![изображение 2](./images/q_2.jpg)
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#### 3. Показания очереди queue_1 при двух запущенных экземплярах Consumer_1
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![изображение 3](./images/q_1_two_comsumer_1.jpg)
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#### 4. Показания очереди queue_1 при трех запущенных экземплярах Consumer_1
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![изображение 4](./images/q_1_three_comsumer_1.jpg)
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### Вывод:
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Из скриншотов видно, что из-за моментальной обработки сообщений в Consumer_2, очередь queue_2 никогда не заполняется.
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Consumer_1 же тратить на обработку 2-3 секунды, из-за чего очередь queue_1 существенно заполняется при одном
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запущенном экземпляре.
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Если уже запущенных экземпляров Consumer_1 будет больше, чем один, то очередь будет заполняться не так быстро,
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и в определенный момент не будет заполняться вообще, что будет при оптимальном количестве запущенных экземпляров Consumer_1.
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## [Видео](https://drive.google.com/file/d/175HC9tEV-s5rglFFp4Z4j7MTteocKYrZ/view?usp=sharing)
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tsukanova_irina_lab_4/images/q_1_one_comsumer_1.jpg
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After Width: | Height: | Size: 139 KiB |
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tsukanova_irina_lab_4/images/q_1_three_comsumer_1.jpg
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After Width: | Height: | Size: 132 KiB |
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tsukanova_irina_lab_4/images/q_1_two_comsumer_1.jpg
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After Width: | Height: | Size: 130 KiB |
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tsukanova_irina_lab_4/images/q_2.jpg
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After Width: | Height: | Size: 123 KiB |
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tsukanova_irina_lab_4/images/t_1.png
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After Width: | Height: | Size: 51 KiB |
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tsukanova_irina_lab_4/images/t_2.png
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After Width: | Height: | Size: 86 KiB |
BIN
tsukanova_irina_lab_4/images/t_3.png
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After Width: | Height: | Size: 64 KiB |
25
tsukanova_irina_lab_4/t_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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11
tsukanova_irina_lab_4/t_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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20
tsukanova_irina_lab_4/t_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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tsukanova_irina_lab_4/t_2/worker.py
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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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13
tsukanova_irina_lab_4/t_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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22
tsukanova_irina_lab_4/t_3/receive_logs.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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