Merge pull request 'tsukanova_irina_lab_4' (#64) from tsukanova_irina_lab_4 into main

Reviewed-on: Alexey/DAS_2024_1#64
This commit is contained in:
Alexey 2024-10-19 12:00:40 +04:00
commit 4c974bfb51
17 changed files with 223 additions and 0 deletions

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import random
import time
import pika
queue_name = 'queue_1'
exchange = 'logs'
def callback(ch, method, properties, body):
print(f" [Consumer_1] - получено сообщение - {body.decode()}")
time.sleep(random.choice([2, 3]))
print(f" [Consumer_1] - сообщение обработано")
print()
ch.basic_ack(delivery_tag=method.delivery_tag)
if __name__ == '__main__':
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
try:
# своя не анонимная очередь
channel.queue_declare(queue=queue_name)
# binding на exchange
channel.queue_bind(exchange=exchange, queue=queue_name)
channel.basic_consume(queue=queue_name, on_message_callback=callback)
channel.start_consuming()
except KeyboardInterrupt:
connection.close()

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import pika
queue_name = 'queue_2'
exchange = 'logs'
def callback(ch, method, properties, body):
print(f" [Consumer_2] - получено сообщение - {body.decode()}")
print(f" [Consumer_2] - сообщение обработано")
print()
ch.basic_ack(delivery_tag=method.delivery_tag)
if __name__ == '__main__':
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
try:
# своя не анонимная очередь
channel.queue_declare(queue=queue_name)
# binding на exchange
channel.queue_bind(exchange=exchange, queue=queue_name)
channel.basic_consume(queue=queue_name, on_message_callback=callback)
channel.start_consuming()
except KeyboardInterrupt:
connection.close()

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import random
import time
import pika
if __name__ == '__main__':
connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='logs', exchange_type='fanout')
try:
while True:
message = random.choice(["SIGABRT", "SIGALRM", "SIGKILL", "SIGSTOP", "SIGTERM", "SIGINT", "SIGQUIT"])
channel.basic_publish(exchange='logs', routing_key='', body=message)
time.sleep(1)
except KeyboardInterrupt:
connection.close()

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# Цуканова Ирина ПИбд-42
# Лабораторная работа №4 - Работа с брокером сообщений
## Предметная область:
Сигналы в операционных системах семейства Unix
## Прохождение tutorial:
- Прохождение первого урока:
![изображение 1](./images/t_1.png)
- Прохождение второго урока:
![изображение 2](./images/t_2.png)
- Прохождение третьего урока:
![изображение 3](./images/t_3.png)
## Данные из RabbitMQ Management UI:
#### 1. Показания очереди queue_1 при одном запущенном экземпляре Consumer_1
![изображение 1](./images/q_1_one_comsumer_1.jpg)
#### 2. Показания очереди queue_2
![изображение 2](./images/q_2.jpg)
#### 3. Показания очереди queue_1 при двух запущенных экземплярах Consumer_1
![изображение 3](./images/q_1_two_comsumer_1.jpg)
#### 4. Показания очереди queue_1 при трех запущенных экземплярах Consumer_1
![изображение 4](./images/q_1_three_comsumer_1.jpg)
### Вывод:
Из скриншотов видно, что из-за моментальной обработки сообщений в Consumer_2, очередь queue_2 никогда не заполняется.
Consumer_1 же тратить на обработку 2-3 секунды, из-за чего очередь queue_1 существенно заполняется при одном
запущенном экземпляре.
Если уже запущенных экземпляров Consumer_1 будет больше, чем один, то очередь будет заполняться не так быстро,
и в определенный момент не будет заполняться вообще, что будет при оптимальном количестве запущенных экземпляров Consumer_1.
## [Видео](https://drive.google.com/file/d/175HC9tEV-s5rglFFp4Z4j7MTteocKYrZ/view?usp=sharing)

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import pika, sys, os
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)

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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()

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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()

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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()

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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()

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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()