/**
* @param AWatcher $Watcher
* @throws \Exception
*/
public final function addWatcher(AWatcher $Watcher)
{
/**
* Three keys are always use for system needs so we have to be
* sure that nobody will be able to break this logic.
*/
if (in_array($Watcher->getKey(), ['namespace', 'method', 'params'])) {
throw new \Exception('Can\'t use reserved key "' . $Watcher->getKey() . '" for custom needs!');
}
/**
* To prevent all kind of potential errors, the reassigning
* of already existing keys isn't possible.
*/
if (Arr::has($this->Watchers, $Watcher->getKey())) {
throw new \Exception('Watcher for key "' . $Watcher->getKey() . '" is already registered!');
}
$this->Watchers[$Watcher->getKey()] = $Watcher;
}
