SWI-Prolog engine as a Service

 I have a Java Program that will generate a Query for SWI-Prolog(CLPFD). I
need this query to be sent to SWI-Prolog for further processing and getting
back the results or Output of the SWI-Prolog.

I figured out JPL is a good approach and also we can try to host SWI-Prolog
engine as a Web Service and send our query which is generated by Java
Program to get back the results.

I saw a web services section in SWI-Prolog Documentation but it seems like
creating web Servers in SWI-Prolog which serves html pages and http
requests but not the SWI-Prolog Functionality as a Service itself.

Can you let me know which is the better approach for my problem? JPL or
Hosting SWI-Prolog engine as a service?

If the latter is better can you guide me how to do it and communicate with
the web service?

I am using a Windows 8 machine with SWI-Prolog 6.6.4 setup.

Thanks,
Pavan.
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