What are the differences between publish-subscribe and message queue?

What are the differences between publish-subscribe and message queue?

The publish-subscribe model allows messages to be sent to multiple subscribers, while a message queue typically sends messages to a single consumer.

Can you explain how each model works?

Sure! In publish-subscribe, publishers send messages to a topic, and subscribers receive messages from that topic. In a message queue, producers send messages to a queue, and consumers pull messages from that queue.

What are the advantages of using publish-subscribe over message queues?

Publish-subscribe is great for broadcasting messages to multiple consumers simultaneously, which can improve scalability and reduce latency.

Are there any scenarios where message queues are preferred?

Yes, message queues are preferred in scenarios where message order is important or when you need to ensure that each message is processed exactly once.