将具有指定输入的API回调计划到我的服务器

Question

I've a Nodejs server running on Amazon EC2 cloud under ELB which serves REST APIs to android and web clients. I want to achieve following:

• Client executes /book API with callback time and booking_id as input.
• Node server registers callback to it's /serve API with booking_id as input at callback time specified in /book request

Example:
1. Client A calls /book API with input
{ "booking_id": 1234, "callback_at" :"Oct 4, 5 pm" }
(The actual callback_at value will be an ISO timestamp.)

2. NodeJS server under ELB registers callback to /serve API with some scheduler like AWS Lambda at Oct 4, 5pm and input as booking_id 1234.

I cannot use OS based or other system specific scheduler which will fail if that instance of server under ELB goes down. It has to be a scale-able solution.
Therefore, it must be some external scheduler service.
So far I've found AWS Lambda as possible solution to achieve this. Are there better/free alternatives for scheduling callback?
Is there a better approach to fulfil this requirement?

Thanks in advance!

Answer 1

看看节点时间表： https ： //www.npmjs.com/package/node-schedule