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Index: library/mongodb/README.md
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diff -u
--- library/mongodb/README.md	(revision 0)
+++ library/mongodb/README.md	(revision 63cca48b152e7d05d77e6fc5986695113f11a672)
@@ -0,0 +1,137 @@
+
+# Interface between mongoDB and the Next Scripting Framework #
+
+## Ingredients:##
+
+  https://github.com/mongodb/mongo
+  https://github.com/mongodb/mongo-c-driver
+
+The current version is tested with
+- Tcl 8.5, 8.6 and 8.7
+- MongoDB v3.6.5 (released May 29, 2018)
+- mongodb-c-driver 1.11.0 (released June 23, 2018)
+- libbson 1.11.0 (released June 23, 2018)
+
+Follow the following steps to get MongoDB up and running
+and to compile the MongoDB driver for NX.
+
+
+## OBTAIN MONGODB and MONGO-C-DRIVER: ##
+
+- Compile or obtain mongodb (the database).
+
+- Compile or obtain the mongo-c-driver (client interface)
+
+````
+      cd /usr/local/src
+      wget https://github.com/mongodb/mongo-c-driver/releases/download/1.11.0/mongo-c-driver-1.11.0.tar.gz
+      tar zxvf  mongo-c-driver-1.11.0.tar.gz
+      rm -rf mongo-c-driver
+      ln -sf mongo-c-driver-1.11.0 mongo-c-driver
+      cd mongo-c-driver
+      cmake .
+      make
+      sudo make install
+````
+
+  Alternatively, one can get the newest version from git
+
+````
+      cd /usr/local/src
+      git clone https://github.com/mongodb/mongo-c-driver
+      cd mongo-c-driver
+      cmake .
+      make
+      sudo make install
+````
+
+  If you experience errors during autogen on Debian, you might have to
+      apt-get install libtool
+
+  If configure complains about not finding bson, you might have to do
+      export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+
+  Note: Version 1.5.1 of the c-driver leads on macOS to a crash on
+  exit, when configured SASL support (from mac ports) and the flag
+  "--disable-automatic-init-and-cleanup" is missing.
+
+
+## COMPILING THE MONGO NSF INTERFACE: ##
+
+Assume the following installation directories
+
+  - Tcl:             /usr/local/ns/lib/
+  - mongo-c-driver: /usr/local/src/mongo-c-driver/
+
+configure the mongodb NSF interface via the following
+command in the directory nsf*/library/mongodb/
+You will probably have to adjust the paths.
+
+````
+   ./configure --with-tcl=/usr/local/ns/lib/ --prefix=/usr/local/ns --with-nsf=../../ \
+               --with-mongoc=/usr/local/include/libmongoc-1.0/,/usr/local/lib/ \
+               --with-bson=/usr/local/include/libbson-1.0,/usr/local/lib/ \
+	       --enable-threads --enable-symbols
+````
+
+In order to run the sample script,
+  * first start the mongodb (e.g. mongod)
+
+  * go to your NSF source directory
+
+  * make sure, the c-driver libraries are on the library path
+    (assuming the c-driver was installed in /usr/local/lib)
+
+````
+    export DYLD_LIBRARY_PATH=/usr/local/lib:`pwd`
+````
+
+  * run
+
+````
+    ./nxsh library/mongodb/tests/nsf-mongo.test
+````
+
+    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 this script, you should could
+    check the content in MongoDB:
+
+````
+    % mongo
+    MongoDB shell version: v3.4.0
+    connecting to: test
+    > use tutorial
+    switched to db tutorial
+    >  db.persons.find();
+   { "_id" : ObjectId("530c6e4649686ad16e261f81"), "name" : "Gustaf", "projects" : "nsf", "age" : 53 }
+   { "_id" : ObjectId("530c6e4649686ad16e261f82"), "name" : "Stefan", "projects" : "nsf" }
+   { "_id" : ObjectId("530c6e4649686ad16e261f83"), "name" : "Victor", "a" : [  "x",  "y" ], "age" : 31 }
+   { "_id" : ObjectId("530c6e4649686ad16e261f84"), "name" : "Joe", "projects" : "abc", "age" : 23, "classes" : [  DBRef("courses", ObjectId("100000000000000000000000")) ] }
+   { "_id" : ObjectId("530c6e4649686ad16e261f85"), "name" : "Franz", "info" : { "x" : 203, "y" : 102 }, "age" : 29, "projects" : "gtat" }
+   { "_id" : ObjectId("530c6e4649686ad16e261f86"), "name" : "Selim", "ts" : Timestamp(1302945037, 1), "d" : ISODate("2011-04-16T09:53:39.279Z") }
+   >
+````
+
+## Further sample-scripts: ##
+
+````
+    ./nxsh library/mongodb/tests/nx-bi.test
+    ./nxsh library/mongodb/tests/nx-reference-one.test
+    ./nxsh library/mongodb/tests/nx-reference-many.test
+    ./nxsh library/mongodb/tests/nx-rep.test
+    ./nxsh library/mongodb/tests/nx-serialize.test
+    ./nxsh library/mongodb/tests/nsf-gridfs.test
+````
+
Index: library/mongodb/nsfmongo.c
===================================================================
diff -u -r75f11a9a1c2b7370a3aa39c9b7fc1b98c5da7812 -r63cca48b152e7d05d77e6fc5986695113f11a672
--- library/mongodb/nsfmongo.c	(.../nsfmongo.c)	(revision 75f11a9a1c2b7370a3aa39c9b7fc1b98c5da7812)
+++ library/mongodb/nsfmongo.c	(.../nsfmongo.c)	(revision 63cca48b152e7d05d77e6fc5986695113f11a672)
@@ -934,7 +934,7 @@
 /*
  * The call "mongoc_collection_create_index" is deprecated and should be
  * replaced by "mongoc_database_write_command_with_opts". However, this call
- * requires "db", which is member of mongoc_collection_t, but not publically
+ * requires "db", which is member of mongoc_collection_t, but not public
  * accessible, and up to now, there is apparently no API to access this
  * member.
  */