protected DynamicPageCacheSubscriber::shouldCacheResponse(CacheableResponseInterface $response)
Whether the given response should be cached by Dynamic Page Cache.
We consider any response that has cacheability metadata meeting the auto- placeholdering conditions to be uncacheable. Because those conditions indicate poor cacheability, and if it doesn't make sense to cache parts of a page, then neither does it make sense to cache an entire page.
But note that auto-placeholdering avoids such cacheability metadata ever bubbling to the response level: while rendering, the Renderer checks every subtree to see if meets the auto-placeholdering conditions. If it does, it is automatically placeholdered, and consequently the cacheability metadata of the placeholdered content does not bubble up to the response level.
Parameters
\Drupal\Core\Cache\CacheableResponseInterface $response: The response whose cacheability to analyze.
Return value
bool Whether the given response should be cached.
See also
\Drupal\Core\Render\Renderer::shouldAutomaticallyPlaceholder()
File
- core/modules/dynamic_page_cache/src/EventSubscriber/DynamicPageCacheSubscriber.php, line 229
Class
- DynamicPageCacheSubscriber
- Returns cached responses as early and avoiding as much work as possible.
Namespace
Drupal\dynamic_page_cache\EventSubscriber
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | protected function shouldCacheResponse(CacheableResponseInterface $response) { $conditions = $this->rendererConfig['auto_placeholder_conditions']; $cacheability = $response->getCacheableMetadata(); // Response's max-age is at or below the configured threshold. if ($cacheability->getCacheMaxAge() !== Cache::PERMANENT && $cacheability->getCacheMaxAge() <= $conditions['max-age']) { return FALSE; } // Response has a high-cardinality cache context. if (array_intersect($cacheability->getCacheContexts(), $conditions['contexts'])) { return FALSE; } // Response has a high-invalidation frequency cache tag. if (array_intersect($cacheability->getCacheTags(), $conditions['tags'])) { return FALSE; } return TRUE;} |
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