Resolves a cache miss.

When an offset is not found in the object, this is treated as a cache miss. This method allows classes using this implementation to look up the actual value and allow it to be cached.

Parameters

string $key: The offset that was requested.

Return value

mixed The value of the offset, or NULL if no value was found.

Overrides CacheCollector::resolveCacheMiss

See also

::getActiveTrailIds()

File

core/lib/Drupal/Core/Menu/MenuActiveTrail.php, line 83

Class

MenuActiveTrail

Provides the default implementation of the active menu trail service.

Namespace

Drupal\Core\Menu

Code

protected function resolveCacheMiss($menu_name) {
  $this->storage[$menu_name] = $this->doGetActiveTrailIds($menu_name);
  if (empty($menu_name)) {
    // We look in every menu so invalidate when any menu or menu item changes.
    $this->tags[] = 'config:menu_list';
    $this->tags[] = 'menu_link_content_list';
  }
  else {
    $this->tags[] = 'config:system.menu.' . $menu_name;
  }
  $this->persist($menu_name);
  return $this->storage[$menu_name];
}

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