Comment by jrochkind1
Comment by jrochkind1 21 hours ago
If the thing was mutated between your retries, then wasn't the etag changed by that mutation? So if you know the etag you started with, your conditional update on etag fails due to changed etag. So you fetch it again and start over. Which is the general optimistic locking algorithm.
i may be missing something though?
let's say you have an object like this when you started: {count: 10, etag: 1}. then for some reason, something failed.
when you retry and load the object, you get {count: 12, etag: 3}. how do you know if your previous attempt had successfully persisted or not, or if the updates to the object came from other processes/requests?
you're mixing up conflict handling vs. idempotency