Merge pull request 'kurushina_ksenia_lab_4' (#332) from kurushina_ksenia_lab_4 into kurushina_ksenia_lab_3

Reviewed-on: #332

kurushina_ksenia_lab_4/Consumer_1.py

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+import pika
+import time
+
+
+def callback(ch, method, properties, body):
+    print(f'Consumer 1 получил сообщение: {body.decode()}')
+
+    time.sleep(2)
+
+    print('Consumer 1 закончил обработку')
+
+
+def consume_events_1():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+    channel.queue_declare(queue='consumer1_queue')
+    channel.queue_bind(exchange='beauty_salon_events', queue='consumer1_queue')
+    channel.basic_consume(queue='consumer1_queue', on_message_callback=callback, auto_ack=True)
+    print('Consumer 1 начал ожидать сообщения...')
+    channel.start_consuming()
+
+if __name__ == "__main__":
+    consume_events_1()

kurushina_ksenia_lab_4/Consumer_2.py

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+import pika
+
+
+def callback(ch, method, properties, body):
+    print(f'Consumer 2 получил сообщение: {body.decode()}')
+
+    print('Consumer 2 закончил обработку')
+
+
+def consume_events_2():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+
+    channel.queue_declare(queue='consumer2_queue')
+
+    channel.queue_bind(exchange='beauty_salon_events', queue='consumer2_queue')
+
+    channel.basic_consume(queue='consumer2_queue', on_message_callback=callback, auto_ack=True)
+
+    print('Consumer 2 начал ожидать сообщения...')
+    channel.start_consuming()
+
+
+if __name__ == "__main__":
+    consume_events_2()

kurushina_ksenia_lab_4/README.md

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+### Лабораторная работа №4 - Работа с брокером сообщений
+
+#### Задание
+
+1. Установить брокер сообщений RabbitMQ.
+2. Пройти уроки 1, 2 и 3 из RabbitMQ Tutorials на любом языке программирования.
+3. Продемонстрировать работу брокера сообщений.
+
+#### Описание работы программы:
+
+- **Класс Publisher** успешно осуществляет отправку сообщений своим клиентам.
+  
+- **Класс Consumer1** принимает и обрабатывает сообщения с задержкой в 3 секунды, что можно заметить на видео.
+
+- **Класс Consumer2** мгновенно принимает и обрабатывает сообщения.
+
+## Видео 
+
+https://cloud.mail.ru/public/Kopp/GG62rnCQj

kurushina_ksenia_lab_4/lesson_1/receive.py

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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)

kurushina_ksenia_lab_4/lesson_1/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()

kurushina_ksenia_lab_4/lesson_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()

kurushina_ksenia_lab_4/lesson_2/worker.py

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+#!/usr/bin/env python
+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()

kurushina_ksenia_lab_4/lesson_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()

kurushina_ksenia_lab_4/lesson_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()

kurushina_ksenia_lab_4/publisher.py

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+import pika
+import time
+
+
+def publish_events():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost'))
+    channel = connection.channel()
+
+    channel.exchange_declare(exchange='beauty_salon_events', exchange_type='fanout')
+
+    events = [
+        "5",
+        "4",
+        "3",
+        "2",
+        "1"
+    ]
+
+    while True:
+        event = events[int(time.time()) % len(events)]
+        channel.basic_publish(exchange='beauty_salon_events', routing_key='', body=event)
+        print(f'Отправлено: {event}')
+        time.sleep(1)
+
+
+if __name__ == "__main__":
+    publish_events()