Store shell script in MongoDB

get_script.rb

require 'bundler/setup'

require 'json'
require 'mongo'
require 'fileutils'

include Mongo

if __FILE__ == $0

  # establish a connection to MongoDB
  mongo = MongoClient.new

  # access the "scripts" collection of the "shell_script_test" db
  db      = mongo.db("shell_script_test")
  scripts = db['scripts']

  # search for a document whose name is 'neo4j'
  doc     = scripts.find_one(name: 'neo4j')

  # write the contents of the script to a copy of the original script
  output_file = File.open("neo4j_copy", "w")
  output_file.print doc["contents"]
  output_file.close

  # since we started with an executable script; make the copy executable too
  FileUtils.chmod "u+x", 'neo4j_copy'

  # all done
  mongo.close

end

import_script.rb

require 'bundler/setup'

require 'json'
require 'mongo'

include Mongo

if __FILE__ == $0

  # assume 'neo4j' script is present in current directory; read it into memory
  input_file = File.open('neo4j');
  contents = input_file.read

  # create a Hash with the name of the shell script and its contents
  document = { name: 'neo4j', contents: contents }

  # establish a connection to MongoDB
  mongo = MongoClient.new

  # access the "shell_script_test" db; note: creates db if not present
  db      = mongo.db("shell_script_test")
  # access the 'scripts' collection within the db; note: creates it if not present
  scripts = db['scripts']

  # insert the script into the collection
  scripts.insert( document );

  # all done
  mongo.close

end

StoreFilesInMongo.md

Storing Files in MongoDB

Here's a quick, two-script example of storing and retrieving the contents of a file in MongoDB.

import_script.rb: reads a file and stores it in MongoDB. Hardwired to use the 'neo4j' start-up script. You can change the name to be anything you want (just update the name that is stored in the 'document' variable too!).

get_script.rb: reads a file from MongoDB and writes it to the file system. Again, this example is hardwired to work with the neo4j script that was used in the import_script.rb file. You can once again update this code to work with any script that you have on your own computer.

These programs are written in Ruby and make use of the 'mongo' gem to access MongoDB.