onChange

Registers a listener that is called whenever the config changes.

The listener receives both the old and new config instances, enabling diff-based logic:

config.onChange { old, new ->
    if (old.database.host != new.database.host) {
        reconnectDatabase(new.database)
    }
}

Listeners are stored in a CopyOnWriteArrayList and are safe to register from any thread. They are invoked on the thread that triggered the reload.

Parameters