gistfile1.rb

import com.mongodb.Mongo
import com.mongodb.DBCollection
import com.mongodb.BasicDBObject
import com.mongodb.DBObject
import com.mongodb.DBCursor
import com.mongodb.DB

import java.util.Set
import java.util.List

gistfile2.rb

begin
  m = Mongo.new
  db = m.getDB "mydb"
  # the rest of the code will go here
rescue Exception
end

gistfile3.rb

colls = db.getCollectionNames

colls.each do |coll|
  puts coll
end

gistfile4.rb

testColl = db.getCollection "testCollection"
testColl.drop # drop the data from previous test

gistfile5.rb

doc = BasicDBObject.new
doc.put "name", "MongoDB"
doc.put "type", "database"
doc.put "count", 1

info = BasicDBObject.new
info.put "x", 203
info.put "y", 102

doc.put "info", info

gistfile6.rb

testColl.insert(doc)

gistfile7.rb

myDoc = testColl.findOne
puts myDoc