Institute of Information Science - University of Miskolc

User Tools

Site Tools

Trace:
tanszek:oktatas:iss_t:messaging_systems

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
tanszek:oktatas:iss_t:messaging_systems [2023/04/24 19:08] – [MQTT example] kneheztanszek:oktatas:iss_t:messaging_systems [2025/04/14 07:31] (current) – [MQTT example] knehez
Line 15: Line 15:
 A message queue is a software that enables communication between different software components in a distributed system. It allows components to exchange messages asynchronously, which can improve the overall reliability and scalability of the system. Message queues are commonly used in software integration, where they facilitate the exchange of messages between different applications, services, and systems. A message queue is a software that enables communication between different software components in a distributed system. It allows components to exchange messages asynchronously, which can improve the overall reliability and scalability of the system. Message queues are commonly used in software integration, where they facilitate the exchange of messages between different applications, services, and systems.
  
-RabbitMQ (https://www.rabbitmq.com/#features) is a popular open-source message broker that implements the Advanced Message Queuing Protocol AMQP ([[https://www.rabbitmq.com/resources/specs/amqp0-9-1]]). It allows applications to communicate with each other through a message queue, which can be hosted locally or in the cloud. RabbitMQ supports a wide range of messaging patterns, including point-to-point, publish-subscribe, and request-reply. It also provides features such as message persistence, routing, and priority queuing.+RabbitMQ (https://www.rabbitmq.com/#features) is a popular open-source message broker that implements the Advanced Message Queuing Protocol AMQP ([[https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-types-v1.0-os.html]]). It allows applications to communicate with each other through a message queue, which can be hosted locally or in the cloud. RabbitMQ supports a wide range of messaging patterns, including point-to-point, publish-subscribe, and request-reply. It also provides features such as message persistence, routing, and priority queuing.
  
 In RabbitMQ, messages are published by producers to a specific exchange, which routes them to one or more queues based on the specified routing key. Consumers then subscribe to the queues and receive messages. RabbitMQ supports multiple programming languages, including Java, Python, .NET, and Node.js, making it a versatile messaging solution for various use cases. In RabbitMQ, messages are published by producers to a specific exchange, which routes them to one or more queues based on the specified routing key. Consumers then subscribe to the queues and receive messages. RabbitMQ supports multiple programming languages, including Java, Python, .NET, and Node.js, making it a versatile messaging solution for various use cases.
Line 53: Line 53:
 This code sets up a callback function that will be called every time a message is received from the 'my_queue' queue. The `auto_ack` parameter specifies whether to automatically acknowledge the message after it has been processed. Finally, the `start_consuming` method starts consuming messages from the queue. This code sets up a callback function that will be called every time a message is received from the 'my_queue' queue. The `auto_ack` parameter specifies whether to automatically acknowledge the message after it has been processed. Finally, the `start_consuming` method starts consuming messages from the queue.
  
-==== Type of "Exchange" in RabbitMQ ====+=====  Type of "Exchange" in RabbitMQ ===== 
  
 An exchange in RabbitMQ is a messaging entity that receives messages from producers and routes them to queues based on some criteria. When a producer sends a message to RabbitMQ, it sends the message to an exchange. The exchange then examines the message's routing key and decides which queue(s) the message should be sent to. An exchange in RabbitMQ is a messaging entity that receives messages from producers and routes them to queues based on some criteria. When a producer sends a message to RabbitMQ, it sends the message to an exchange. The exchange then examines the message's routing key and decides which queue(s) the message should be sent to.
Line 107: Line 107:
 Each exchange type has its own routing algorithm and is used in different messaging scenarios. Understanding the exchange types is important when designing RabbitMQ architectures that meet specific business requirements. Each exchange type has its own routing algorithm and is used in different messaging scenarios. Understanding the exchange types is important when designing RabbitMQ architectures that meet specific business requirements.
  
-==== MQTT example ====+===== MQTT example ===== 
  
 Clone repository into docker playground: Clone repository into docker playground:
  
     git clone https://github.com/knehez/isi.git     git clone https://github.com/knehez/isi.git
-    cd isis/mqtt-python+    cd isi/mqtt-python
     docker-compose up     docker-compose up
  
Line 242: Line 242:
 print("Stopped...") print("Stopped...")
 </code> </code>
 +
 +
tanszek/oktatas/iss_t/messaging_systems.1682363292.txt.gz · Last modified: 2023/04/24 19:08 by knehez