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<?php |
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/** |
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* @file |
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* The MongoDB cache module. |
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* |
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* This module only needed: |
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* - to ensure system_cron triggers expires on cache bins not declared by their |
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* owner modules in hook_flush_caches(). |
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* - to ensure a 503 status on exceptions. |
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*/ |
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use Drupal\mongodb_cache\Cache; |
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/** |
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* Implements hook_exit(). |
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*/ |
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function mongodb_cache_exit() { |
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if (Cache::hasException()) { |
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drupal_add_http_header('Status', '503 Service Unavailable'); |
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} |
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} |
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/** |
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* Implements hook_flush_caches(). |
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* |
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* Support triggering expiration in modules not declaring their cache bins, |
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* either by taking them from an explicit variable, or by performing a discovery |
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* assuming the cache bin names to start by 'cache_'. |
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*/ |
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function mongodb_cache_flush_caches() { |
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// Recursion protection, not static caching, so no drupal_static(). |
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static $reentry = FALSE; |
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if ($reentry) { |
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return []; |
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} |
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// Hardcoded in drupal_flush_all_caches() or system_cron(), but not declared |
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// in system_flush_caches(). |
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$system_bins = [ |
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'cache', |
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'cache_bootstrap', |
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'cache_filter', |
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'cache_form', |
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'cache_menu', |
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'cache_page', |
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'cache_path', |
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]; |
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$reentry = TRUE; |
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$owned_bins = module_invoke_all('flush_caches'); |
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$reentry = FALSE; |
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$detected_bins = variable_get('mongodb_cache_extra_bins', NULL); |
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// As with databases, NULL means unknown, so perform a discovery. |
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if (!isset($detected_bins)) { |
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$detected_bins = []; |
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$names = mongodb()->getCollectionNames(FALSE); |
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foreach ($names as $name) { |
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if (strpos($name, 'cache_') === 0) { |
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$detected_bins[] = $name; |
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} |
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} |
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} |
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$adopted_bins = array_diff($detected_bins, $system_bins, $owned_bins); |
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return $adopted_bins; |
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} |
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/** |
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* Implements hook_module_implements_alter(). |
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*/ |
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function mongodb_cache_module_implements_alter(&$implementations, $hook) { |
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if ($hook !== ('flush_caches')) { |
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return; |
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} |
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$module = 'mongodb_cache'; |
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unset($implementations[$module]); |
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$implementations[$module] = FALSE; |
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} |
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FGM /
mongodb
