Method cleanup

packages/core/nest-application-context.ts:366–397

(signal: string)

  ) {
    let receivedSignal = false;
    const cleanup = async (signal: string) => {
      try {
        if (receivedSignal) {
          // If we receive another signal while we're waiting
          // for the server to stop, just ignore it.
          return;
        }
        receivedSignal = true;
        await this.initializationPromise;
        await this.callDestroyHook();
        await this.callBeforeShutdownHook(signal);
        await this.dispose();
        await this.callShutdownHook(signal);
        signals.forEach(sig => process.removeListener(sig, cleanup));

        if (options.useProcessExit) {
          // Use process.exit() to ensure the 'exit' event is properly triggered.
          // This is required for async loggers (like Pino with transports)
          // to flush their buffers before the process terminates.
          process.exit(0);
        } else {
          process.kill(process.pid, signal);
        }
      } catch (err) {
        Logger.error(
          MESSAGES.ERROR_DURING_SHUTDOWN,
          (err as Error)?.stack,
          NestApplicationContext.name,
        );
        process.exit(1);
      }
    };
    this.shutdownCleanupRef = cleanup as (...args: unknown[]) => unknown;

    signals.forEach((signal: string) => {