/**
* Loads event subscribers from configuration
*/
private function loadEventSubscribersFile()
{
// Load file.
$bag = new ContainerLessBag();
$fileLoader = $this->getServiceBag()->getFileLoader();
$filename = $this->generateConfigFilePath('event_subscribers.yml');
$fileLoader->loadFileToBag($filename, 'event_subscribers', $bag);
// Resolve parameters.
$fileLoader->resolveParameters($bag, $this->getParameterBag());
$eventSubscribers = array();
// Instantiate services and load then to the container.
foreach ($bag->values() as $name => $values) {
// Multiple definitions for the same event subscriber, abort.
if (array_key_exists($name, $eventSubscribers)) {
throw ConfigurationException::multipleEventSubscriberDefinitionsException($name);
}
// Check if class is set (null counts as unset).
if (!isset($values['class'])) {
throw ConfigurationException::configurationAttributeNotFoundException($filename, $name, 'class');
}
$class = $values['class'];
$eventSubscriber = $this->instantiateClass($class, isset($values['arguments']) ? $values['arguments'] : array());
if (!$eventSubscriber instanceof EventSubscriberInterface) {
throw LogicException::mustImplementInterfaceException('EventSubscriberInterface', $class);
}
$eventSubscribers[$name] = $eventSubscriber;
}
// Register the event subscribers.
foreach ($eventSubscribers as $eventSubscriber) {
$this->registerEventSubscriber($eventSubscriber);
}
}
