Function callModuleInitHook

packages/core/hooks/on-module-init.hook.ts:37–64

(module: Module)

 * @param module The module which will be initialized
 */
export async function callModuleInitHook(module: Module): Promise<void> {
  const providers = module.getNonAliasProviders();
  // Module (class) instance is the first element of the providers array
  // Lifecycle hook has to be called once all classes are properly initialized
  const [_, moduleClassHost] = providers.shift()!;
  const instances = [
    ...module.controllers,
    ...providers,
    ...module.injectables,
    ...module.middlewares,
  ];

  const nonTransientInstances = getNonTransientInstances(instances);
  await Promise.all(callOperator(nonTransientInstances));

  const transientInstances = getTransientInstances(instances);
  await Promise.all(callOperator(transientInstances));

  // Call the instance itself
  const moduleClassInstance = moduleClassHost.instance;
  if (
    moduleClassInstance &&
    hasOnModuleInitHook(moduleClassInstance) &&
    moduleClassHost.isDependencyTreeStatic()
  ) {
    await moduleClassInstance.onModuleInit();
  }
}