java:jinterface-implementation: multiple interfaces?

[Alessio Stalla]

@Mark Evenson <evenson at panix.com> would a GitHub fork + pull request work
for you in case I work on this?

On Thu, 30 Jul 2020 at 13:40, Alessio Stalla <alessiostalla at gmail.com>
wrote:

> 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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