如何从nestjs saga发出多个命令？

// 定义领域事件
class OrderCreatedEvent {
  constructor(public readonly orderId: string) {}
}

// 领域事件处理程序
@EventsHandler(OrderCreatedEvent)
class OrderCreatedHandler implements IEventHandler<OrderCreatedEvent> {
  constructor(private readonly commandBus: CommandBus) {}

  async handle(event: OrderCreatedEvent) {
    // 发送多个命令
    await Promise.all([
      this.commandBus.execute(new ProcessOrderCommand(event.orderId)),
      this.commandBus.execute(new SendEmailCommand(event.orderId)),
      this.commandBus.execute(new UpdateInventoryCommand(event.orderId)),
    ]);
  }
}

// 创建saga
@Saga()
export class OrderSaga {
  constructor(
    private readonly eventBus: EventBus,
    private readonly commandBus: CommandBus,
  ) {
    this.registerHandlers();
  }

  registerHandlers() {
    this.eventBus.register(OrderCreatedEvent, OrderCreatedHandler);
  }

  @SagaEventHandler(OrderCreatedEvent)
  async handleOrderCreated(event: OrderCreatedEvent) {
    // 执行一系列的命令
    await this.commandBus.execute(new ProcessOrderCommand(event.orderId));
    await this.commandBus.execute(new SendEmailCommand(event.orderId));
    await this.commandBus.execute(new UpdateInventoryCommand(event.orderId));
  }
}