Issue #2594549: Update cron integration to match current API

queue_ui.module

@@ -159,25 +159,16 @@ function queue_ui_defined_queues() {
 }
 
 /**
- * Implements hook_cron().
+ * hook_queue_info_alter()
  */
-function queue_ui_cron() {
-  // Retrieve queues set for cron processing.
-  $defs = queue_ui_defined_queues();
-  if (!empty($defs)) {
-    foreach ($defs as $name => $definition) {
-      $queue = Drupal::queue($name);
-      // A cron callback must be defined and there must be items in the queue.
-      if (isset($definition['cron']) && is_object($queue) && $queue->numberOfItems()) {
-        $active = variable_get('queue_ui_cron_' . $name, FALSE);
-        if ($active) {
-          // Pass $queue to cron callback for processing.
-          $function = $definition['cron']['callback'];
-          // Definitions can define arguments.
-          $args = isset($definition['cron']['callback']) ? $definition['cron']['callback'] : NULL;
-          $function($queue, $args);
-        }
-      }
+function queue_ui_queue_info_alter(&$queues) {
+  foreach ($queues as $queue_name => $definition) {
+
+    // Check if a time limit override exists for this queue.
+    $time_limit = \Drupal::state()->get('queue_ui_cron_' . $queue_name);
+    if (!is_null($time_limit)) {
+      // Override the original definition.
+      $queues[$queue_name]['cron']['time'] = $time_limit;
     }
   }
 }