java:jinterface-implementation: multiple interfaces?

[Alessio Stalla]

Hmm so Spark being a distributed computing library I guess you need full
serialization of functions/closures. Well, I can give it a shot, but don't
expect anything too soon.

On Thu, 30 Jul 2020 at 13:26, Steven Nunez <steve_nunez at yahoo.com> wrote:

> Sorry, meant to send to the ABCL-dev list the first time.
>
> The use case is Spark lambda functions. I couldn't do a better job than
> the Spark RDD Programming Guide
> <http://spark.apache.org/docs/latest/rdd-programming-guide.html> does at
> explaining the use case. It starts on the Basics heading. The ideal case
> would be the ability to take Java code like this:
>
> JavaRDD<Integer> lineLengths = lines.map(s -> s.length());
>
> and write it in ABCL like this:
>
> (let ((line-lengths (#"map" *lines* (lambda (s) (length s)))))
>
> This uses the ABCL length function, which would be a huge win if we can
> use Lisp functions to map across data structure. I've already got abcl.jar
> accessible to Spark on all the nodes of a cluster. I'd probably shadow the
> cl:lambda with a spark:lambda to make the syntax natural.
>
>
> On Thursday, July 30, 2020, 7:08:35 PM GMT+8, Alessio Stalla <
> alessiostalla at gmail.com> wrote:
>
>
> Somewhere in between.
> I could give a shot at it. It would be useful if Steven detailed his use
> case a bit more.
>
>
> On Thu, Jul 30, 2020, 13:04 Mark Evenson <evenson at panix.com> wrote:
>
>
>
> > On Jul 30, 2020, at 10:00, Alessio Stalla <alessiostalla at gmail.com>
> wrote:
> >
> > Correction: indeed it was merged, but I didn't go as far as to make
> closures serializable.
>
> Any idea how much work for someone (i.e. me)to be able to serialize
> closures?
> Just a bit of elbow-grease, or major implementation?
>
> --
> "A screaming comes across the sky.  It has happened before but there is
> nothing
> to compare to it now."
>
>
>
>
>
>
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