artamonova_tatyana_lab_4 is ready

artamonova_tatyana_lab_4/Consumer1.py

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+import pika
+import json
+import time
+
+credentials = pika.PlainCredentials('guest', 'guest')
+connection = pika.BlockingConnection(
+  pika.ConnectionParameters(host='localhost', credentials=credentials))
+channel = connection.channel()
+
+channel.queue_declare(queue='order_queue_1')
+
+channel.queue_bind(exchange='order_events', queue='order_queue_1')
+
+def callback(ch, method, properties, body):
+  event = json.loads(body.decode('utf-8'))
+  print(f'Получено событие (очередь 1): {event}')
+  print(f'Обработка заказа {event["order_id"]}...')
+  time.sleep(2)
+
+channel.basic_consume(queue='order_queue_1', on_message_callback=callback, auto_ack=True)
+
+print('Ожидание сообщений (очередь 1)...')
+channel.start_consuming()

artamonova_tatyana_lab_4/Consumer2.py

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+import pika
+import json
+import time
+
+credentials = pika.PlainCredentials('guest', 'guest')
+connection = pika.BlockingConnection(
+  pika.ConnectionParameters(host='localhost', credentials=credentials))
+channel = connection.channel()
+
+channel.queue_declare(queue='order_queue_2')
+
+channel.queue_bind(exchange='order_events', queue='order_queue_2')
+
+def callback(ch, method, properties, body):
+  event = json.loads(body.decode('utf-8'))
+  print(f'Получено событие (очередь 2): {event}')
+  print(f'Обработка заказа {event["order_id"]} завершена.')
+
+channel.basic_consume(queue='order_queue_2', on_message_callback=callback, auto_ack=True)
+
+print('Ожидание сообщений (очередь 2)...')
+channel.start_consuming()

artamonova_tatyana_lab_4/Publisher.py

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+import pika
+import json
+import time
+import random
+
+credentials = pika.PlainCredentials('guest', 'guest')
+connection = pika.BlockingConnection(
+  pika.ConnectionParameters(host='localhost', credentials=credentials))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='order_events', exchange_type='fanout')
+
+while True:
+  event = {
+    'event_type': 'order_created',
+    'order_id': random.randint(1000, 9999),
+    'customer_name': f'Клиент {random.randint(1, 100)}',
+    'product_name': f'Товар {random.randint(1, 10)}',
+    'quantity': random.randint(1, 10),
+    'timestamp': time.time()
+  }
+
+  channel.basic_publish(
+    exchange='order_events',
+    routing_key='',
+    body=json.dumps(event)
+  )
+  print(f'Опубликовано событие: {event}')
+  time.sleep(1)
+
+connection.close()

artamonova_tatyana_lab_4/readme.md

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+## Лабораторная работа №4 ПИбд-42 Артамонова Татьяна
+
+### Прохождение туториала
+1. ![tutorial-1.png](images/tutorial-1.png)
+2. ![tutorial-2.png](images/tutorial-2.png)
+3. ![tutorial-3.png](images/tutorial-3.png)
+
+### Запуск приложений и анализ скорости обработки
+
+1. Запуск Publisher, Consumer 1 и Consumer 2.
+* Consumer 1: Очередь order_queue_1 будет иметь некоторое количество сообщений, так как Consumer 1 обрабатывает сообщения с задержкой в 2 секунды.
+* Consumer 2: Очередь order_queue_2 будет практически пустой, так как Consumer 2 обрабатывает сообщения моментально.
+
+2. Запуск нескольких копий Consumer 1
+* Очередь order_queue_1 будет иметь меньше сообщений, так как 3 Consumer-а обрабатывают сообщения быстрее, чем 1 Consumer.
+
+![queue1.png](images/queue1.png)
+
+![queue2.png](images/queue2.png)
+
+![exchange.png](images/exchange.png)
+
+![consumers.png](images/consumers.png)
+
+### Видео
+https://vk.com/video/@artamonovat?section=upload&z=video212084908_456239359

artamonova_tatyana_lab_4/tutorial/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)

artamonova_tatyana_lab_4/tutorial/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()

artamonova_tatyana_lab_4/tutorial/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()

artamonova_tatyana_lab_4/tutorial/2/worker.py

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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()

artamonova_tatyana_lab_4/tutorial/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()

artamonova_tatyana_lab_4/tutorial/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()