tasks/ostrovskaya-sf/lab_4/README.md

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+# Отчет по лабораторной работе №4
+
+Выполнила студентка гр. ИСЭбд-41 Островская С. Ф.
+
+## Прохождение tutorial
+
+Установила rabbitMQ server, erlang и зашла в брокер под гостем по http://localhost:15672/#/ 
+![](pic/pic1.jpg)
+
+Туториал 1:
+
+![](pic/pic2.jpg)
+![](pic/pic3.jpg)
+
+Туториал 2:
+
+![](pic/pic4.jpg)
+![](pic/pic5.jpg)
+
+Туториал 3:
+
+![](pic/pic6.jpg)
+![](pic/pic7.jpg)
+
+## Разработка демонстрационных приложений
+
+Предметная область: Дополнительный соглашения и договоры на проживание.
+Разработаны три приложения, согласно предметной области.
+
+1. Publisher
+
+```py
+import pika
+import time
+import random
+
+collection = ["Application for accommodation in a dormitory", "Rector's order", "Conclusion of an agreement", "Check-into a dormitory"]
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='Agreements', exchange_type='fanout')
+
+while True:
+    message = f"Message: {random.choice(collection)}"
+
+    channel.basic_publish(exchange='Agreements', routing_key='', body=message)
+
+    time.sleep(1)
+
+connection.close()
+```
+
+2. Consumer 1.
+
+```py
+import pika
+import time
+
+def process_message(ch, method, properties, body):
+    print(f"Получено сообщение: {body}")
+    time.sleep(3)
+    print("Сообщение успешно обработано")
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='Agreements', queue=queue_name)
+
+channel.basic_consume(queue=queue_name, on_message_callback=process_message, auto_ack=True)
+
+print('Ожидание сообщений...')
+channel.start_consuming()
+```
+
+3. Consumer 2.
+
+```py
+import pika
+
+
+def process_message(ch, method, properties, body):
+    print(f"Получено сообщение: {body}")
+    print("Сообщение успешно обработано")
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='Agreements', queue=queue_name)
+
+channel.basic_consume(queue=queue_name, on_message_callback=process_message, auto_ack=True)
+
+print('Ожидание сообщений...')
+channel.start_consuming()
+```
+
+## Результаты выполнения лабораторной работы
+
+Результат отработки Consumer_1:
+
+![](pic/pic8.jpg)
+![](pic/pic9.jpg)
+
+Результат отработки Consumer_2:
+
+![](pic/pic10.jpg)
+![](pic/pic11.jpg)
+
+Вывод: Consumer_2 нагружает меньше памяти, чем Consumer_1 и принимает сообщения гораздо быстрее, тем самым не позволяя очереди накапливать огромное количество сообщений.

tasks/ostrovskaya-sf/lab_4/lab_4_py/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml

tasks/ostrovskaya-sf/lab_4/lab_4_py/.idea/inspectionProfiles/profiles_settings.xml

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+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>

tasks/ostrovskaya-sf/lab_4/lab_4_py/.idea/lab_4_py.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

tasks/ostrovskaya-sf/lab_4/lab_4_py/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.9" project-jdk-type="Python SDK" />
+</project>

tasks/ostrovskaya-sf/lab_4/lab_4_py/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/lab_4_py.iml" filepath="$PROJECT_DIR$/.idea/lab_4_py.iml" />
+    </modules>
+  </component>
+</project>

tasks/ostrovskaya-sf/lab_4/lab_4_py/main_task/consumer_1.py

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+import pika
+import time
+
+def process_message(ch, method, properties, body):
+    print(f"Получено сообщение: {body}")
+    time.sleep(3)
+    print("Сообщение успешно обработано")
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='Agreements', queue=queue_name)
+
+channel.basic_consume(queue=queue_name, on_message_callback=process_message, auto_ack=True)
+
+print('Ожидание сообщений...')
+channel.start_consuming()

tasks/ostrovskaya-sf/lab_4/lab_4_py/main_task/consumer_2.py

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+import pika
+
+
+def process_message(ch, method, properties, body):
+    print(f"Получено сообщение: {body}")
+    print("Сообщение успешно обработано")
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='Agreements', queue=queue_name)
+
+channel.basic_consume(queue=queue_name, on_message_callback=process_message, auto_ack=True)
+
+print('Ожидание сообщений...')
+channel.start_consuming()

tasks/ostrovskaya-sf/lab_4/lab_4_py/main_task/publisher.py

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+import pika
+import time
+import random
+
+collection = ["Application for accommodation in a dormitory", "Rector's order", "Conclusion of an agreement", "Check-into a dormitory"]
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+channel.exchange_declare(exchange='Agreements', exchange_type='fanout')
+
+while True:
+    message = f"Message: {random.choice(collection)}"
+
+    channel.basic_publish(exchange='Agreements', routing_key='', body=message)
+
+    time.sleep(1)
+
+connection.close()

tasks/ostrovskaya-sf/lab_4/lab_4_py/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='OstrovsofaLogs')
+
+    def callback(ch, method, properties, body):
+        print(f" [x] Получено сообщение: {body}")
+
+    channel.basic_consume(queue='OstrovsofaLogs', on_message_callback=callback, auto_ack=True)
+
+    print(' [*] Ожидание сообщений. Для завершения CTRL+C')
+    channel.start_consuming()
+
+if __name__ == '__main__':
+    try:
+        main()
+    except KeyboardInterrupt:
+        print('Произошла ошибка')
+        try:
+            sys.exit(0)
+        except SystemExit:
+            os._exit(0)

tasks/ostrovskaya-sf/lab_4/lab_4_py/tutorial_1/send.py

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+import pika
+
+connection = pika.BlockingConnection(pika.ConnectionParameters('localhost'))
+channel = connection.channel()
+
+channel.queue_declare(queue='ostrovsofa')
+
+channel.basic_publish(exchange='',routing_key='ostrovsofa',body='My cat"s name is Montik!')
+print(" [x] Отправлено сообщение")
+
+connection.close()

tasks/ostrovskaya-sf/lab_4/lab_4_py/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='ostrovsofa2', durable=True)
+
+message = ' '.join(sys.argv[1:]) or "My cat's name is Montik!"
+channel.basic_publish(exchange='', routing_key='ostrovsofa2', body=message, properties=pika.BasicProperties(
+        delivery_mode=pika.spec.PERSISTENT_DELIVERY_MODE))
+print(f" [x] Отправлено {message}")
+connection.close()

tasks/ostrovskaya-sf/lab_4/lab_4_py/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='ostrovsofa2', durable=True)
+print(' [*] Ожидание сообщений. Для завершения CTRL+C')
+
+def callback(ch, method, properties, body):
+    print(f" [x] Получено сообщение: {body.decode()}")
+    time.sleep(body.count(b'.'))
+    print(" [x] Выполнено")
+    ch.basic_ack(delivery_tag=method.delivery_tag)
+
+channel.basic_qos(prefetch_count=1)
+channel.basic_consume(queue='ostrovsofa2', on_message_callback=callback)
+
+channel.start_consuming()

tasks/ostrovskaya-sf/lab_4/lab_4_py/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='OstrovsofaLogs', exchange_type='fanout')
+
+message = ' '.join(sys.argv[1:]) or "Info: My cat's name is Montik!"
+channel.basic_publish(exchange='OstrovsofaLogs', routing_key='', body=message)
+print(f" [x] Отправлено сообщение: {message}")
+connection.close()

tasks/ostrovskaya-sf/lab_4/lab_4_py/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='OstrovsofaLogs', exchange_type='fanout')
+
+result = channel.queue_declare(queue='', exclusive=True)
+queue_name = result.method.queue
+
+channel.queue_bind(exchange='OstrovsofaLogs', queue=queue_name)
+
+print(' [*] Ожидание сообщений. Для завершения 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()