Cache

Clear all cache entries.

Dump cache contents to a JSON file for offline use.

Get a value from cache.

Returns the cached value or undefined if not found. Stale entries are still returned (background refresh handles updates).

Remove a specific entry from cache.

Load cache contents from a JSON file.

Loaded entries get a fresh TTL starting from load time.

Reset all metrics to zero.

Set a value in the cache.

Start the background refresh loop.

Stop background refresh. Should be called when the client is being cleaned up.