Publish-subscribe.
also: pub-sub · pub/sub · pubsub · publish/subscribeA messaging pattern where every message published to a topic is delivered to all of its subscribers.
the two-minute refresher
- One event, many listeners: order.created reaches billing, email and analytics.
- The publisher doesn't know who listens, so new subscribers need no producer change.
- Contrast with a work queue, where each message goes to exactly one consumer.
- Consumer groups combine both: fan-out across groups, load balancing within a group.