Interface between mongoDB and the Next Scripting Framework

Ingredients:
  https://github.com/mongodb/mongo
  https://github.com/mongodb/mongo-c-driver (requires version v0.3 or better)

Compile or obtain mongodb (the database).
Compile or obtain the mongo-c-driver (client interface)

Assume, Tcl is under /usr/local/ns/lib and the mongo-c-driver is under
/usr/local/src/mongo-c-driver/, then configure the nsf interface via the
following command from nsf*/library/mongodb/  

   ./configure --with-tcl=/usr/local/ns/lib --with-nsf=../../ \
   	       --with-mongo=/usr/local/src/mongo-c-driver/src/,/usr/local/src/mongo-c-driver

I had to add MONGO_HAVE_STDINT to the EXTRA_FLAGS 
of library/mongodb/Makefile.in on MacOS X 

    EXTRA_CFLAGS	= @PKG_CFLAGS@ -DMONGO_HAVE_STDINT

TODO: remove the hardcoded define flag in Makefile.in

In order to run the sample script, 
  * first start the mongdb (eg. mongod)

  * go to your nsf source directory

  * make sure, the c-driver libraries are on the library path
    export DYLD_LIBRARY_PATH=/usr/local/src/mongo-c-driver/:`pwd`

  * run ./nxsh library/mongodb/example-nsf-mongo.tcl
 
    The script is using the low level interface (nsf::mongo) and has a
    few insert, query and delete statements, some of these are
    commented out.

 * run ./nxsh library/mongodb/example-nx-mongo.tcl
 
    This example script is using the higher level object oriented
    interface for nx (nx::mongo).

After running the scripts, you should see output like the one below.

   % /usr/local/bin/mongo
   MongoDB shell version: 1.9.0-pre-
   connecting to: test
   > use tutorial
   switched to db tutorial
   > db.persons.find();

-gustaf neumann

===============================================================
~/src/nsf-2.0.0% ./nxsh library/mongodb/example-nsf-mongo.tcl
/usr/local/src/tcl8.5.9/unix/tclsh
Inserting a few tuples

Create an index on name (ascending)

Full content
_id oid 4d9b0d56e7b0887e00000000 name string Joe projects string abc age integer 23
_id oid 4d9b0d56e7b0887e00000001 name string Gustaf projects string nsf age integer 53
_id oid 4d9b0d56e7b0887e00000002 name string Stefan projects string nsf
_id oid 4d9b0d56e7b0887e00000003 name string Franz info object {x integer 203 y integer 102} age integer 29
_id oid 4d9b0d56e7b0887e00000004 name string Victor a array {0 string x 1 string y} age integer 31

Project members of nsf sorted by name
_id oid 4d9b0d56e7b0887e00000001 name string Gustaf projects string nsf age integer 53
_id oid 4d9b0d56e7b0887e00000002 name string Stefan projects string nsf

Age > 30
_id oid 4d9b0d56e7b0887e00000001 name string Gustaf projects string nsf age integer 53
_id oid 4d9b0d56e7b0887e00000004 name string Victor a array {0 string x 1 string y} age integer 31

Array 'a' contains 'x'
_id oid 4d9b0d56e7b0887e00000004 name string Victor a array {0 string x 1 string y} age integer 31

Embedded object has some value (info.y > 100)
_id oid 4d9b0d56e7b0887e00000003 name string Franz info object {x integer 203 y integer 102} age integer 29

Nsfmongo Exit
===============================================================


~/src/nsf-2.0.0% ./nxsh library/mongodb/example-nx-mongo.tcl 

Query: {$query} object {name string Gustaf}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 53 projects array {0 string nsf}

Query: {$query} object {name string Gustaf}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}

Project members of nsf:
Query: {$query} object {projects string nsf}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}
_id oid 4d9c224135018d4500000001 name string Stefan projects array {0 string nsf}
	::nsf::__#5:	Gustaf
	::nsf::__#6:	Stefan

All Persons sorted by name (ascending):
Query: {$query} object {} {$orderby} object {name int 1}
_id oid 4d9c224135018d4500000003 name string Franz age integer 29 projects array {0 string gtat 1 string annobackend 2 string abc}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}
_id oid 4d9c224135018d4500000002 name string Joe age integer 23 projects array {0 string abc}
_id oid 4d9c224135018d4500000001 name string Stefan projects array {0 string nsf}
	::nsf::__#7:	Franz
	::nsf::__#8:	Gustaf
	::nsf::__#9:	Joe
	::nsf::__#A:	Stefan

Members of Projects != 'abc' nsf sorted by name desc and age:
Query: {$query} object {projects object {{$ne} string abc}} {$orderby} object {name int -1 age int 1}
_id oid 4d9c224135018d4500000001 name string Stefan projects array {0 string nsf}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}
	::nsf::__#B:	Stefan
	::nsf::__#C:	Gustaf

Find persons age > 30:
Query: {$query} object {age object {{$gt} integer 30}}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}
	::nsf::__#D:	Gustaf

Find oldies:
Query: {$query} object {age object {{$gt} integer 30}}
_id oid 4d9c224135018d4500000000 name string Gustaf age integer 55 projects array {0 string xowiki 1 string nsf}
	::nsf::__#E:	Gustaf
Nsfmongo Exit