Saving an order and publishing an event are two systems, and there is no transaction across them. Whichever order they happen in, a failure between them leaves the…
LIKE cannot use an index and everyone knows it. The mapping, the analyzers that decide what matching means, the indexing pipeline, and the drift it introduces.
Version numbers in a URL suggest that consumers can be moved forward on a schedule. They cannot — a mobile application on a customer’s phone is a client…
Every broker worth using guarantees at-least-once delivery, and the phrase is a warning rather than a feature: a message can and will arrive twice. Exactly-once is not available…
Replacing a system incrementally requires something able to send some requests to the old implementation and some to the new. Without it, the migration is all-or-nothing however carefully…
Integrating with a third party whose model does not match yours spreads their vocabulary through your codebase — their status codes, their date format, their idea of what…
Two services with their own repositories, deployments and teams still cannot change independently if they read the same tables. The dependency is real and invisible — nothing in…
The word usually gets explained in terms of services and databases, which puts the mechanism before the reason. A bounded context is the region within which a word…