KeyValueDatabaseFactory example

// This loop creates a new fork to set or get key values keys.     foreach ($functions as $i => $function) {
      $pid = pcntl_fork();
      if ($pid == -1) {
        $this->fail("Error forking");
      }
      elseif ($pid == 0) {
        Database::addConnectionInfo('default' . $i, 'default', $default_connection['default']);
        Database::setActiveConnection('default' . $i);
        // Create a new factory using the new connection to avoid problems with         // forks closing the database connections.         $factory = new KeyValueDatabaseFactory($this->container->get('serialization.phpserialize'), Database::getConnection());
        $store = $factory->get('test');
        // Sleep so that all the forks start at the same time.         usleep((int) (($time_to_start - microtime(TRUE)) * 1000000));
        if ($function === 'getAll') {
          $this->assertIsArray($store->getAll());
        }
        else {
          $this->assertNull($store->set('foo' . $i, 'bar'));
        }
        exit();
      }
    }