annotate core/lib/Drupal/Core/Lock/PersistentDatabaseLockBackend.php @ 13:5fb285c0d0e3

Update Drupal core to 8.4.7 via Composer. Security update; I *think* we've
been lucky to get away with this so far, as we don't support self-registration
which seems to be used by the so-called "drupalgeddon 2" attack that 8.4.5
was vulnerable to.

<?php

namespace Drupal\Core\Lock;

use Drupal\Core\Database\Connection;

/**
 * Defines the persistent database lock backend. This backend is global for this
 * Drupal installation.
 *
 * @ingroup lock
 */
class PersistentDatabaseLockBackend extends DatabaseLockBackend {

  /**
   * Constructs a new PersistentDatabaseLockBackend.
   *
   * @param \Drupal\Core\Database\Connection $database
   *   The database connection.
   */
  public function __construct(Connection $database) {
    // Do not call the parent constructor to avoid registering a shutdown
    // function that releases all the locks at the end of a request.
    $this->database = $database;
    // Set the lockId to a fixed string to make the lock ID the same across
    // multiple requests. The lock ID is used as a page token to relate all the
    // locks set during a request to each other.
    // @see \Drupal\Core\Lock\LockBackendInterface::getLockId()
    $this->lockId = 'persistent';
  }

}