Module offline 

Handling of user commands while the client is between connections.

Functions

drain_queued_commands 🔒

Drains commands queued while offline onto a freshly established connection.

process_command_offline 🔒

Handles a command received while the client is offline (in the reconnect backoff phase), with a bound on how much may be buffered.

record_offline_ack 🔒

Parks the completion future for an offline SUBSCRIBE/UNSUBSCRIBE keyed by its allocated packet id, or fails it if allocation failed. After parking, any earlier request the new one superseded (same filter, now orphaned) is failed.