Merge pull request 'novopolcev_alexander_lab_4' (#367) from novopolcev_alexander_lab_4_fix into main

Reviewed-on: #367

novopolcev_alexander_lab_4/1_lesson/receive.py

@@ -0,0 +1,25 @@
+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)

novopolcev_alexander_lab_4/1_lesson/send.py

@@ -0,0 +1,11 @@
+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()

novopolcev_alexander_lab_4/2_lesson/new_task.py

@@ -0,0 +1,19 @@
+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()

novopolcev_alexander_lab_4/2_lesson/worker.py

@@ -0,0 +1,23 @@
+#!/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()

novopolcev_alexander_lab_4/3_lesson/emit_log.py

@@ -0,0 +1,13 @@
+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()

novopolcev_alexander_lab_4/3_lesson/receive_logs.py

@@ -0,0 +1,22 @@
+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()

novopolcev_alexander_lab_4/Consumer_1.py

@@ -0,0 +1,26 @@
+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:
+        channel.queue_declare(queue=queue_name)
+        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()

novopolcev_alexander_lab_4/Consumer_2.py

@@ -0,0 +1,25 @@
+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()

novopolcev_alexander_lab_4/Publisher.py

@@ -0,0 +1,17 @@
+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()

novopolcev_alexander_lab_4/README.md

@@ -0,0 +1,53 @@
+# Лабораторная работа №4 - Работа с брокером сообщений 
+
+## Задание
+
+
+* Установить брокер сообщений RabbitMQ.
+* Пройти уроки 1, 2 и 3 из RabbitMQ Tutorials на любом языке программирования.
+* Продемонстрировать работу брокера сообщений.
+
+## Работа программы:
+
+Класс ```Publisher``` успешно осуществляет отправку сообщений своим клиентам.
+
+Класс ```Consumer1``` осуществляет принятие и обработку сообщений с задержкой.
+
+Класс ```Consumer2``` мгновенно осуществляет принятие и обработку сообщений.
+
+### Уроки
+
+ 1. lesson_1
+
+![](lesson_1.jpg "")
+
+ 2. lesson_2
+
+![](lesson_2.jpg "")
+
+ 3. lesson_3
+
+![](lesson_3.jpg "")
+
+## Работа с RabbitMQ Management UI
+
+![](rabbitmq.jpg "")
+
+### Показания очереди queue_1 при одном запущенном экземпляре Consumer_1
+
+![](queue_1_1.jpg "")
+
+### Показания очереди queue_2
+
+![](queue_2.jpg "")
+
+### Показания очереди queue_1 при двух запущенных экземплярах Consumer_1
+
+![](queue_1_2.jpg "")
+
+### Показания очереди queue_1 при трех запущенных экземплярах Consumer_1
+
+![](queue_1_3.jpg "")
+
+# Видео
+https://disk.yandex.ru/i/rkzo5oxLGFsBIw