Making an EXPath module?

[ChristianGruen]

Hi Dannes, I've just discovered your MongoDB module for eXist-db. We've done a similar module recently, based on XQuery maps and arrays; maybe we can join forces and make an EXPath module out of it? Would you be interested?

[ChristianGruen]

To complement this: In 2012/13, this has been the Zorba approach to integrate MongoDB:

• http://archive.xmlprague.cz/2013/presentations/Bringing_the_NoSQL_Datastores_into_an_XQuery_Playground.pdf
• http://archive.xmlprague.cz/2013/files/xmlprague-2013-proceedings.pdf

[dizzzz]

Hi Christian,

yes I would be certainly be interested in aligning the works, and join forces; I am actually developing a Couchbase driver as well, so your message pos in on the right moment :-)

[ChristianGruen]

Here are two simple examples of our MongoDB connector (which was inspired by the Java driver. It looks pretty similar to your approach:

(: Example 1: List all database entries. :)
import module namespace mongo = 'http://basex.org/modules/mongodb';

(: Could potentially be extended to multiple server addresses :)
let $mongo-id := mongo:connect('localhost', 27017)
return (
  for $db-id in mongo:dbs($mongo-id)
  for $coll-id in mongo:collections($db-id)
  return mongo:find($coll-id),
  (: optional: connection will automatically be closed after query execution :)
  mongo:close($mongo-id)
)

(: Possible result: :)
map { "_id": 1, "name" : "eXist-db" },
map { "_id": 2, "name" : "BaseX" },
map { "_id": 3, "name" : "Saxon" },
map { "_id": 4, "name" : "Zorba" },
map { "_id": 5, "name" : "Qizx" }

(: Example 2: Find specified collection entry. :)
import module namespace mongo = 'http://basex.org/modules/mongodb';

let $mongo := mongo:connect('localhost')
let $db := mongo:db($mongo, 'database')
let $coll := mongo:collection($db, 'collection')
return mongo:find($coll, map { '_id': 1 })

We have no critical applications for this module so far, and you said you are already working on the second version, so we could further align it with your function signatures.

[dizzzz]

Ok I'll dive into it; most of the signatures are documented in the wiki, and have xquery test: https://github.com/dizzzz/Mongrel/tree/develop/java/test/src/org/exist/mongodb/test/db ; the tests marked with _xq31 indicate xquery31 compatible tests....