Calling R via Rserve is faster than a REST based solution. However, if you do some non-trivial computation in R, then the calling overhead is insignificant. A REST based solution is more flexible. A REST API can be called e.g. directly from a Javascript UI and the indirection via a Java backend is not necessary. I see that there is a Javascript client for Rserve https://github.com/cscheid/rserve-js but the last release is from 2013. Or if you think later that Python is more suited to do this type of work, then you can simply replace the R REST service with a Python REST service without touching the Java code.
Cheers, Adrian *Adrian Trapletti* Steinstrasse 9b, 8610 Uster, Switzerland P +41 44 994 56 30 | M +41 79 103 71 31 adr...@trapletti.org | www.trapletti.org On Sun, Nov 29, 2020 at 9:12 AM Eduard Drenth <edre...@fryske-akademy.nl> wrote: > Because of efficiency? But almost all development I do is in > Java/Xml/XQuery so I am interested in efficiently integrating the two. And > for our small institution it is important to limit the number of > technologies / frameworks. > > Bye, Eduard > > -----Original Message----- > *From*: Adrian Trapletti <adr...@trapletti.org > <adrian%20trapletti%20%3cadr...@trapletti.org%3e>> > *To*: Eduard Drenth <edre...@fryske-akademy.nl > <eduard%20drenth%20%3cedre...@fryske-akademy.nl%3e>> > *Cc*: R-help@r-project.org > *Subject*: Re: calling r from java (Eduard Drenth) > *Date*: Sat, 28 Nov 2020 20:36:14 +0100 > > Hi Eduard, > > I recommend separating the R quant code from Java and deploy the R code as > a REST service, e.g. using https://github.com/opencpu/opencpu > > Best regards > Adrian > > Adrian Trapletti > > Steinstrasse 9b, 8610 Uster, Switzerland > P +41 44 994 56 30 | M +41 79 103 71 31 > adr...@trapletti.org | www.trapletti.org > > On Sat, Nov 28, 2020 at 12:00 PM <r-help-requ...@r-project.org> wrote: > > > > Send R-help mailing list submissions to > > r-help@r-project.org > > > > To subscribe or unsubscribe via the World Wide Web, visit > > https://stat.ethz.ch/mailman/listinfo/r-help > > or, via email, send a message with subject or body 'help' to > > r-help-requ...@r-project.org > > > > You can reach the person managing the list at > > r-help-ow...@r-project.org > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of R-help digest..." > > > > > > Today's Topics: > > > > 1. calling r from java (Eduard Drenth) > > 2. Re: calling r from java (Bert Gunter) > > 3. Re: calling r from java (Jeff Newmiller) > > 4. Re: calling r from java (Bert Gunter) > > 5. Re: calling r from java (Abby Spurdle) > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Fri, 27 Nov 2020 16:47:54 +0000 > > From: Eduard Drenth <edre...@fryske-akademy.nl> > > To: "r-help@r-project.org" <r-help@r-project.org> > > Subject: [R] calling r from java > > Message-ID: > > < > fa5236c2ca174ba8e839129cb0b6b047527a0f67.ca...@fryske-akademy.nl> > > Content-Type: text/plain; charset="utf-8" > > > > Dear all, > > > > As a java developer I prefer to develop rest services using jax-rs. > > > > Now I developed a service that executes Rscript (Using ProcessBuilder), > > sends text to stdin of the process and reads from stdout of the > > process. > > > > Works fine, but this is inefficient, because every call reloads all > > that is needed. > > > > I have looked into this: > > > > https://github.com/microsoft/java-client-library > > https://rforge.net/Rserve/ > > several other sources on stackoverflow etc. > > > > A lot of these sources seem old or not maintained. > > > > Now my question: Is there a preferred and maintained way to efficiently > > call R from Java? Preferrably available in maven central? > > > > Regards, Eduard > > > > > > -- > > Eduard Drenth, Software Architekt > > > > edre...@fryske-akademy.nl > > > > Doelestrjitte 8 > > 8911 DX Ljouwert > > +31 58 234 30 47 > > +31 62 094 34 28 (privé) > > > > skype: eduarddrenth > > https://github.com/eduarddrenth > > frisian.eu > > gpg: https://pgp.surfnet.nl/pks/lookup?search=eduarddrenth > > > > > > Op freed bin ik thús/wurkje ik minder > > > > > > > > > > > > -------------- next part -------------- > > A non-text attachment was scrubbed... > > Name: signature.asc > > Type: application/pgp-signature > > Size: 488 bytes > > Desc: This is a digitally signed message part > > URL: < > https://stat.ethz.ch/pipermail/r-help/attachments/20201127/7d818716/attachment-0001.sig > > > > > > > > -- > > Eduard Drenth, Software Architekt > > edre...@fryske-akademy.nl > > Doelestrjitte 8 > 8911 DX Ljouwert > +31 58 234 30 47 > +31 62 094 34 28 (privé) > > skype: eduarddrenth > https://github.com/eduarddrenth > frisian.eu > gpg: https://pgp.surfnet.nl/pks/lookup?search=eduarddrenth > > > Op freed bin ik thús/wurkje ik minder > > > > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
