Drupal - How to set URL alias automatically for a content type WITHOUT using Pathauto? Which hook to implement?

/**
 * Implements hook_node_insert()
 */
 function mymodule_node_insert($node) {
   if ($node->type == 'mytype') {
     $node->path['alias'] = 'mytype/' . $node->nid;
   }
 }

Additionally, you may add this code to hook_node_update()