How do messages get processed in a non-transactional system following the reliability pattern?

In a non-transactional system that adheres to the reliability pattern, messages are typically processed from a processing queue after being dispatched by the acquisition flow. This approach provides several benefits that align with maintaining reliability in message processing.

When messages are queued after being acquired, it allows for the decoupling of message production from message consumption. This decoupling is essential in a non-transactional context, as it ensures that even if the processing system experiences transient issues or failures, the messages can remain in the queue and be processed later once the system is stable again. The queue serves as a buffer, ensuring that messages are not lost and can be retried if processing fails due to issues such as system overload, connectivity problems, or other transient faults.

Additionally, this method makes it easier to implement scalability. When messages are flowing through a queue, multiple consumers can pull messages from the queue asynchronously. This allows the system to distribute load more efficiently and adaptively, improving overall throughput and responsiveness.

By using a processing queue, the system can apply various strategies for ensuring that messages are processed reliably, such as message acknowledgment, retries, and dead-letter queues for handling failed messages without the risk of data loss or corruption.

Overall, processing from a queue is