function ContextAwarePluginBase::getCacheTags

The cache tags associated with this object.

When this object is modified, these cache tags will be invalidated.

Return value

string[] A set of cache tags.

Overrides CacheableDependencyInterface::getCacheTags

File

core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php, line 146

Class

ContextAwarePluginBase

Base class for plugins that are context aware.

Namespace

Code

public function getCacheTags() {
  $tags = [];
  // Applied contexts can affect the cache tags when this plugin is
  // involved in caching, collect and return them.
  foreach ($this->getContexts() as $context) {
    /** @var $context \Drupal\Core\Cache\CacheableDependencyInterface */
    if ($context instanceof CacheableDependencyInterface) {
      $tags = Cache::mergeTags($tags, $context->getCacheTags());
    }
  }
  return $tags;
}