Sorry I phrased that badly. What I'm trying to do is asynchronously add data to R, i.e. a program will periodically dump some readings to the Rserver and then later on another program will run some analysis scripts on them. I have managed to add the data via CMD_detachedVoidEval as you suggested. How exactly do I go about attaching to the session again? I know it involves some form of session key that comes back from the detach call, but what from does it take? And how do I use this? Thanks AgainMartin > Subject: Re: [Rd] Non-blocking Eval > From: simon.urba...@r-project.org > Date: Mon, 19 Jul 2010 11:34:29 -0400 > CC: r-devel@r-project.org > To: mk2...@hotmail.com > > On Jul 19, 2010, at 10:58 AM, Martin Kerr wrote: > > > > > Hello, > > I'm currently working with the C++ version of the Rserve Client as part of > > a student project. > > Is there an implementation of a non-blocking interface to Rserve in C++? I > > can find one via the Java JRI but no equivalent in C++. > > (Please note that stats-rosuda-devel is the correct list for this.) > > I'm not quite sure what you mean, because in JRI there is idleEval() which is > non-blocking in the sense that it doesn't do anything if R is busy but that > doesn't apply to Rserve as by definition R cannot be busy there. There is no > non-blocking interface to JRI - all calls are synchronous. > > If your question is whether you can start an evaluation in Rserve and not > wait for the result then there is CMD_detachedVoidEval in Rserve, but the C++ > client only implements a subset of the API which does not include that -- > however, it is trivial to implement (just send a request with > CMD_detachedVoidEval as there is nothing to decode). > > Cheers, > Simon > _________________________________________________________________
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