REST与JAX-RS-异步调用

Question

I saw the below post from "cmd" which was posted couple of years back. And "Wojtek Owczarczyk" was answered this one. I am good with all the answer, except last line.

My Confusion is, If we return immediately with ACCEPTED status. Then, we will lost the track of the request.

So i am planning to implement below steps. Please correct me if i am wrong.

1) As soon as the request hits service api - I will create one Job Id and persist my request detail and send back the client with ACCEPTED status code along with Job id. 2) Then, i will create the new thread for that request to continue with the requested operation. 3) After successful completion of Operation, I will send back the client with all status of the request. 4) Finally, in callbackCompletion register i will remove the job id from my persistence list.

To implement the above logic, i need client to send his listener information along with request (basically URI). This is to update the request status to client back, after processing the request.

REST with JAX-RS - Handling long running operations

Answer 1

This is not how REST is meant to work in my opinion. I would do the following approach instead:

• Client makes a request for a long operation
• Create a job id and run the job asynchronously
• Return the accepted status together with the a URI to request the status for the job. For example: http://.../resources/jobs/1234

The client is now responsible eg to poll the URI to get the current status of the job execution.