function system_cron

Implements hook_cron().

Remove older rows from flood, batch cache and expirable keyvalue tables. Also ensure files directories have .htaccess files.

File

core/modules/system/system.module, line 1206

Code

function system_cron() {
    // Clean up the flood.
    \Drupal::flood()->garbageCollection();
    foreach (Cache::getBins() as $cache_backend) {
        $cache_backend->garbageCollection();
    }
    // Clean up the expirable key value database store.
    if (\Drupal::service('keyvalue.expirable.database') instanceof KeyValueDatabaseExpirableFactory) {
        \Drupal::service('keyvalue.expirable.database')->garbageCollection();
    }
    // Clean up any garbage in the queue service.
    $queue_worker_manager = \Drupal::service('plugin.manager.queue_worker');
    $queue_factory = \Drupal::service('queue');
    foreach (array_keys($queue_worker_manager->getDefinitions()) as $queue_name) {
        $queue = $queue_factory->get($queue_name);
        if ($queue instanceof QueueGarbageCollectionInterface) {
            $queue->garbageCollection();
        }
    }
    // Ensure that all of Drupal's standard directories (e.g., the public files
    // directory and config directory) have appropriate .htaccess files.
    \Drupal::service('file.htaccess_writer')->ensure();
}