How to use cloud messaging queues

Short answer

Cloud message queues buffer messages between producers and consumers, enabling async processing and load leveling.

Steps

1. Create a queue or topic.
2. Publishers send messages:

sqs.send_message(QueueUrl=queue_url, MessageBody='task')

3. Consumers poll and process:

messages = sqs.receive_message(QueueUrl=queue_url)

4. Delete messages after successful processing.
5. Configure dead-letter queues for failed messages.

Tips

• FIFO queues preserve ordering but have lower throughput.
• Visibility timeouts prevent duplicate processing.
• Use batch operations to reduce API costs.

Common issues

• Message duplication: design idempotent consumers.
• Poison messages: move them to DLQs quickly.