Same name and namespace in other branches

1. main core/lib/Drupal/Core/Cache/VariationCache.php \Drupal\Core\Cache\VariationCache::getValidatedCachedRedirectChain()

Retrieved the redirect chain from cache, validating each part.

Parameters

string[] $keys: The cache keys to retrieve the redirect chain for.

\Drupal\Core\Cache\CacheableDependencyInterface $initial_cacheability: The initial cacheability for the redirect chain.

Return value

array The part of the cached redirect chain, if any, that is still valid.

2 calls to VariationCache::getValidatedCachedRedirectChain()

VariationCache::getMultiple in core/lib/Drupal/Core/Cache/VariationCache.php

Gets multiple cache entries based on a set of cache keys.

VariationCache::getRedirectChain in core/lib/Drupal/Core/Cache/VariationCache.php

Performs a full get, returning every step of the way.

File

core/lib/Drupal/Core/Cache/VariationCache.php, line 375

Class

VariationCache

Wraps a regular cache backend to make it support cache contexts.

Namespace

Drupal\Core\Cache

Code

protected function getValidatedCachedRedirectChain(array $keys, CacheableDependencyInterface $initial_cacheability) : array {
  $cid = $this->createCacheIdFast($keys, $initial_cacheability);
  if (!isset($this->redirectChainCache[$cid])) {
    return [];
  }
  $chain = $this->redirectChainCache[$cid];
  // Only use that part of the redirect chain that is still valid. Even though
  // we do not store cache hits in the internal redirect chain cache, we can
  // still reuse the whole chain up until what would have been a cache hit.
  //
  // If part of a redirect chain no longer matches because cache contexts
  // changed values, we could perhaps still reuse part of the chain until we
  // encounter a redirect for the changed cache context value.
  //
  // There is one special case: If the very last item of the chain is a cache
  // redirect, and we cannot find anything for it, we still add the redirect
  // to the validated chain because the only way a cached chain ends in a
  // redirect is if it led to a cache hit in ::getRedirectChain().
  $valid_parts = [];
  $last_key = array_key_last($chain);
  foreach ($chain as $key => $result) {
    if ($result && $result->data instanceof CacheRedirect) {
      $cid = $this->createCacheIdFast($keys, $result->data);
      if (!isset($chain[$cid]) && $last_key !== $key) {
        break;

      }
    }
    $valid_parts[$key] = $result;
  }
  return $valid_parts;
}

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