Merge pull request 'bogdanov_dmitry_lab_4' (#100) from bogdanov_dmitry_lab_4 into main

Reviewed-on: #100

bogdanov_dmitry_lab_4/README.md

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+# Богданов Дмитрий ПИбд-42
+# Лабораторная работа №4
+
+
+## Предметная область:
+Автоматизация работы теплицы
+
+## Результаты выполнения туториалов:
+ 
+- Первый туториал:
+![изображение 1](./images/tut1.png)  
+
+- Второй туториал:
+![изображение 2](./images/tut2.png)
+
+- Третий туториал:
+![изображение 3](./images/tut3.png)
+
+
+## Данные из RabbitMQ:
+
+![изображение 1](./images/rmq1.png)
+![изображение 2](./images/rmq2.png)
+![изображение 3](./images/rmq3.png)
+![изображение 3](./images/rmq4.png)
+
+### Вывод:
+Из-за моментальной обработки сообщений в Consumer2, его очередь никогда не заполняется.
+Consumer1 же тратит на обработку 2 секунды, из-за чего соответствующая очередь существенно заполняется при одном 
+запущенном экземпляре.
+При нескольких запущенных экземплярах Consumer1 очередь заполняется существенно медленнее, и перестаёт заполняться совсем при определенном кол-ве запущенных экземпляров.
+
+
+## [Видео](https://drive.google.com/file/d/1KWHHYWiK8OX48OfhDnEKDtMz-Umfs0uj/view?usp=sharing)

bogdanov_dmitry_lab_4/Sample Program/consumer1.py

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+import pika
+import time
+
+
+def callback(ch, method, properties, body):
+    print(f'Receiver 1: получено сообщение. {body.decode()}')
+
+    time.sleep(3)
+
+    print('Receiver 1 закончил обработку')
+
+
+def consume_events_1():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+    channel = connection.channel()
+
+    channel.queue_declare(queue='receiver1_queue')
+    channel.queue_bind(exchange='greenhouse_events', queue='receiver1_queue')
+
+    channel.basic_consume(queue='receiver1_queue', on_message_callback=callback, auto_ack=True)
+
+    print('Ожидание сообщения...')
+    channel.start_consuming()
+
+
+if __name__ == "__main__":
+    consume_events_1()

bogdanov_dmitry_lab_4/Sample Program/consumer2.py

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+import pika
+
+
+def callback(ch, method, properties, body):
+    print(f'Receiver 2: получено сообщение. {body.decode()}')
+
+    print('Receiver 2 закончил обработку')
+
+
+def consume_events_2():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+    channel = connection.channel()
+
+    channel.queue_declare(queue='receiver2_queue')
+    channel.queue_bind(exchange='greenhouse_events', queue='receiver2_queue')
+
+    channel.basic_consume(queue='receiver2_queue', on_message_callback=callback, auto_ack=True)
+
+    print('Ожидание сообщения...')
+    channel.start_consuming()
+
+
+if __name__ == "__main__":
+    consume_events_2()

bogdanov_dmitry_lab_4/Sample Program/publisher.py

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+import pika
+import time
+
+def publish_events():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+    channel = connection.channel()
+
+    channel.exchange_declare(exchange='greenhouse_events', exchange_type='fanout')
+
+    events = [
+        "Влажность превысила верхнюю границу",
+        "Влажность упала за нижнюю границу",
+        "Полив начат",
+        "Полив остановлен"
+    ]
+
+    while True:
+        event = events[int(time.time()) % len(events)]
+        channel.basic_publish(exchange='greenhouse_events', routing_key='', body=event)
+        print(f'Отправлено: {event}')
+        time.sleep(1)
+
+
+if __name__ == "__main__":
+    publish_events()

bogdanov_dmitry_lab_4/Tutorial 1/receive.py

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+import pika, sys, os
+
+def main():
+    connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+    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)

bogdanov_dmitry_lab_4/Tutorial 1/send.py

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+import pika
+
+connection = pika.BlockingConnection(pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+channel = connection.channel()
+
+channel.queue_declare('hello')
+
+channel.basic_publish(exchange='',
+                      routing_key='hello',
+                      body='Hello world!')
+print(" [x] Sent 'Hello world!'")
+
+connection.close()

bogdanov_dmitry_lab_4/Tutorial 2/new_task.py

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+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+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()

bogdanov_dmitry_lab_4/Tutorial 2/worker.py

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+import pika
+import time
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+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()

bogdanov_dmitry_lab_4/Tutorial 3/emit_log.py

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+import pika
+import sys
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+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()

bogdanov_dmitry_lab_4/Tutorial 3/receive_logs.py

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+import pika
+
+connection = pika.BlockingConnection(
+    pika.ConnectionParameters(host='localhost', port=5672, credentials=pika.PlainCredentials("user", "password")))
+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()

bogdanov_dmitry_lab_4/compose.yaml

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+version: '3.8'
+
+services:
+  rabbitmq:
+    image: rabbitmq:3-management
+    container_name: rabbitmq
+    environment:
+      RABBITMQ_DEFAULT_USER: user
+      RABBITMQ_DEFAULT_PASS: password
+    ports:
+      - "5672:5672"
+      - "15672:15672"