function _registry_update
7.x registry.inc | _registry_update() |
Does the work for registry_update().
Related topics
1 call to _registry_update()
- registry_update in drupal-7.x/
includes/ bootstrap.inc - Updates the registry based on the latest files listed in the database.
File
- drupal-7.x/
includes/ registry.inc, line 21 - This file contains the code registry parser engine.
Code
function _registry_update() {
// The registry serves as a central autoloader for all classes, including
// the database query builders. However, the registry rebuild process
// requires write ability to the database, which means having access to the
// query builders that require the registry in order to be loaded. That
// causes a fatal race condition. Therefore we manually include the
// appropriate query builders for the currently active database before the
// registry rebuild process runs.
$connection_info = Database::getConnectionInfo();
$driver = $connection_info['default']['driver'];
require_once DRUPAL_ROOT . '/includes/database/query.inc';
require_once DRUPAL_ROOT . '/includes/database/select.inc';
require_once DRUPAL_ROOT . '/includes/database/' . $driver . '/query.inc';
// Get current list of modules and their files.
$modules = db_query("SELECT * FROM {system} WHERE type = 'module'")->fetchAll();
// Get the list of files we are going to parse.
$files = array();
foreach ($modules as &$module) {
$module->info = unserialize($module->info);
$dir = dirname($module->filename);
// Store the module directory for use in hook_registry_files_alter().
$module->dir = $dir;
if ($module->status) {
// Add files for enabled modules to the registry.
foreach ($module->info['files'] as $file) {
$files["$dir/$file"] = array('module' => $module->name, 'weight' => $module->weight);
}
}
}
foreach (file_scan_directory('includes', '/\.inc$/') as $filename => $file) {
$files["$filename"] = array('module' => '', 'weight' => 0);
}
$transaction = db_transaction();
try {
// Allow modules to manually modify the list of files before the registry
// parses them. The $modules array provides the .info file information, which
// includes the list of files registered to each module. Any files in the
// list can then be added to the list of files that the registry will parse,
// or modify attributes of a file.
drupal_alter('registry_files', $files, $modules);
foreach (registry_get_parsed_files() as $filename => $file) {
// Add the hash for those files we have already parsed.
if (isset($files[$filename])) {
$files[$filename]['hash'] = $file['hash'];
}
else {
// Flush the registry of resources in files that are no longer on disc
// or are in files that no installed modules require to be parsed.
db_delete('registry')
->condition('filename', $filename)
->execute();
db_delete('registry_file')
->condition('filename', $filename)
->execute();
}
}
$parsed_files = _registry_parse_files($files);
$unchanged_resources = array();
$lookup_cache = array();
if ($cache = cache_get('lookup_cache', 'cache_bootstrap')) {
$lookup_cache = $cache->data;
}
foreach ($lookup_cache as $key => $file) {
// If the file for this cached resource is carried over unchanged from
// the last registry build, then we can safely re-cache it.
if ($file && in_array($file, array_keys($files)) && !in_array($file, $parsed_files)) {
$unchanged_resources[$key] = $file;
}
}
module_implements('', FALSE, TRUE);
_registry_check_code(REGISTRY_RESET_LOOKUP_CACHE);
}
catch (Exception $e) {
$transaction->rollback();
watchdog_exception('registry', $e);
throw $e;
}
// We have some unchanged resources, warm up the cache - no need to pay
// for looking them up again.
if (count($unchanged_resources) > 0) {
cache_set('lookup_cache', $unchanged_resources, 'cache_bootstrap');
}
}