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From: Shivaram Venkataraman <shivaram@eecs.berkeley.edu>
Date: Thu, 9 Jul 2015 16:41:11 -0700
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 <CAKx7Bf-ofCaA29JtqjQL78dHuZqbnDLCxacXfjqMHHiP=FURgQ@mail.gmail.com>
Subject: Re: callJMethod?
To: "Vasili I. Galchin" <vigalchin@gmail.com>
Cc: "dev@spark.apache.org" <dev@spark.apache.org>
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callJMethod is a private R function that is defined in
https://github.com/apache/spark/blob/a0cc3e5aa3fcfd0fce6813c520152657d327aaf2/R/pkg/R/backend.R#L31

callJMethod serializes the function names, arguments and sends them over a
socket to the JVM. This is the socket-based R to JVM bridge described in
the Spark Summit talk
https://spark-summit.org/2015/events/sparkr-the-past-the-present-and-the-future/

Thanks
Shivaram

On Thu, Jul 9, 2015 at 4:28 PM, Vasili I. Galchin <vigalchin@gmail.com>
wrote:

> Hello,
>
>        I am reading R code, e.g. RDD.R, DataFrame.R, etc. I see that
> callJMethod is repeatedly call. Is callJMethod part of the Spark Java API?
> Thx.
>
> Vasili
>

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<div dir=3D"ltr">callJMethod is a private R function that is defined in=C2=
=A0<a href=3D"https://github.com/apache/spark/blob/a0cc3e5aa3fcfd0fce6813c5=
20152657d327aaf2/R/pkg/R/backend.R#L31">https://github.com/apache/spark/blo=
b/a0cc3e5aa3fcfd0fce6813c520152657d327aaf2/R/pkg/R/backend.R#L31</a><div><b=
r></div><div>callJMethod serializes the function names, arguments and sends=
 them over a socket to the JVM. This is the socket-based R to JVM bridge de=
scribed in the Spark Summit talk <a href=3D"https://spark-summit.org/2015/e=
vents/sparkr-the-past-the-present-and-the-future/">https://spark-summit.org=
/2015/events/sparkr-the-past-the-present-and-the-future/</a></div><div><br>=
</div><div>Thanks</div><div>Shivaram</div></div><div class=3D"gmail_extra">=
<br><div class=3D"gmail_quote">On Thu, Jul 9, 2015 at 4:28 PM, Vasili I. Ga=
lchin <span dir=3D"ltr">&lt;<a href=3D"mailto:vigalchin@gmail.com" target=
=3D"_blank">vigalchin@gmail.com</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">Hello,<div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0I am rea=
ding R code, e.g. RDD.R, DataFrame.R, etc. I see that callJMethod is repeat=
edly call. Is callJMethod part of the Spark Java API? Thx.</div><span class=
=3D"HOEnZb"><font color=3D"#888888"><div><br></div><div>Vasili</div>
</font></span></blockquote></div><br></div>

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