Asynchronous calls in OpenCPU

Question

I would like to run OpenCPU job asynchronously and collect its results from a different session. In Rserve + RSclient I can do the following:

RS.eval(connection, expression, wait = FALSE)
# do something while the job is running

and then when I'm ready to receive results call either:

RS.collect(connection)

to try to collect results and wait until they are ready if job is still running or:

RS.collect(connection, timeout = 0)

if I want to check the job state and let it run if it is still not finished.

Is it possible with OpenCPU to receive the tmp/*/... path with the result id before the job has finished?

I think you want to do chaining (ocpu request inside an ocpu request). — Stéphane Laurent, Aug 25 '16 at 16:19

score 1 · Answer 1 · edited May 23 '17 at 11:53

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It seems acording to this post that OpenCPU does not support asynchronous jobs. Every request between the browser and the OpenCPU server must be alive in order to execute a script or function and receive a response succesfully. If you find any workaround I would be pleased to know it. In my case, I need to run a long process (may takes a few hours) and I can't keep alive the client request until the process finishes.

edited May 23 '17 at 11:53

Community

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answered May 06 '15 at 15:17

Leonardo Nomdedeu

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Did you find the solution for it? I had a look at https://github.com/joelkuiper/aplomb unfortunately the documentation is not in detail and unable to figure out how to use it. – Prabhakar Jan 28 '17 at 10:26

Asynchronous calls in OpenCPU

1 Answers1