Dear all,
James Wright has recently presented his XQuery Promise Module in
Prague (Proceedings, 139ff [1]). His code is available at GitHub [2],
and we were wondering if people in the community were interested in
seeing the ideas behind this module standardized?
The result could be two specifications:
1. The Promise Module
* This module is inspired by the Promise Pattern as it is available in
e.g. jQuery and AngularJS.
* It includes functions like defer(), then(), fail() and others (see
the links for more details)
* It seems to be possible to implement 90% or even 100% of the module
in pure XQuery.
2. The Async Module
* In its initial version, the module contains a single async:fork-join
function, which can be used to process a sequence of XQuery functions
in parallel [3].
* The module could be enhanced with an extension of the FLWOR
expressions and an 'async' keyword in for clauses [4].
* It could further be extended with two functions async:fork and
async:join. The first function would trigger the evaluation of a query
(supplied as string) as a separate process; the second function could
be called to fetch the result of the first function.
Thoughts are welcome; thanks in advance,
Christian
[1]
http://archive.xmlprague.cz/2016/files/xmlprague-2016-proceedings.pdf
[2]
http://github.com/james-jw/xq-promise/
[3]
https://github.com/james-jw/xq-promise/issues/16
[4]
https://github.com/james-jw/xq-promise/issues/15