Event-carried state transfer pattern communicates an event with some coupling and networking tradeoffs.
Same intent as event notification, but this design attempts to reduce the need for consumers to follow up for more information by providing a best guess at what is needed up front. This couples at the event production interface rather than other queryable interfaces. It also reduces latency (reduces need for post-event queries) while adding lots of potentially unnecessary network load.rF1
Martin Fowler, “What Do You Mean by ‘Event-Driven’?,” martinfowler.com, 2017, https://martinfowler.com/articles/201701-event-driven.html. (See notes.)