function ContextAwarePluginTrait::getCacheTags

3 calls to ContextAwarePluginTrait::getCacheTags()
ForumBlockBase::getCacheTags in core/modules/forum/src/Plugin/Block/ForumBlockBase.php
SystemBrandingBlock::getCacheTags in core/modules/system/src/Plugin/Block/SystemBrandingBlock.php
SystemMenuBlock::getCacheTags in core/modules/system/src/Plugin/Block/SystemMenuBlock.php
3 methods override ContextAwarePluginTrait::getCacheTags()
ForumBlockBase::getCacheTags in core/modules/forum/src/Plugin/Block/ForumBlockBase.php
SystemBrandingBlock::getCacheTags in core/modules/system/src/Plugin/Block/SystemBrandingBlock.php
SystemMenuBlock::getCacheTags in core/modules/system/src/Plugin/Block/SystemMenuBlock.php

File

core/lib/Drupal/Core/Plugin/ContextAwarePluginTrait.php, line 187

Class

ContextAwarePluginTrait
Provides a trait to add context-aware functionality to plugins.

Namespace

Drupal\Core\Plugin

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 \Drupal\Core\Cache\CacheableDependencyInterface $context */
    if ($context instanceof CacheableDependencyInterface) {
      $tags = Cache::mergeTags($tags, $context->getCacheTags());
    }
  }
  return $tags;
}

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