How can you design a credential rotation strategy using Spring CredHub's regenerate operation?

A workable rotation strategy leans on three things CredHub already gives you: generated (not written) credentials, version history, and permission scoping — combined with a schedule your app controls.

1. Generate, don't write. Only credentials created with generate() remember their parameters and can be rotated with a single regenerate() call later.
2. Trigger regeneration on a schedule. A Spring @Scheduled job (or an external rotation trigger) calls the credentials operations' regenerate() method at whatever cadence your security policy requires.
3. Overlap old and new briefly. Because the previous value is retained in history, consumers can tolerate a short window where either the old or new value is valid — important for anything with connection pools that don't reconnect instantly, like a database password.
4. Scope permissions tightly. Only the actor performing rotation needs WRITE; consuming apps only need READ, ideally granted per-actor through V2 permissions so a compromised consumer can't rotate credentials it merely reads.

The main pitfall to design around is that regeneration doesn't notify consumers — an app holding a cached value has no idea it just went stale. Pairing rotation with either a short cache TTL or an explicit refresh signal, such as a config-refresh event, is what actually closes the loop, since CredHub's job ends at "the value changed," not "everyone who cares now knows."