Windows 8 MongoDB in secure mode

• add auth=true in mongo.cfg file
• Start mongod.exe in console or use windows service configured in (http://devsuggestion.blogspot.com/2014/10/mongodb-windows8-installation.html)
• Start mongo.exe in another console
• use admin
• db.addUser("user","password")
• use test
• db.auth("user","password")
• db.addUser("testuser","testpassword")
• Now test db is accessible using username/password only

Java code to generate BigDecimal Random value

To generrate BigDecimal between 0 to defined range use following code:

private BigDecimal randomNo(int range) {

        BigDecimal rangeInBD = new BigDecimal(range);
        BigDecimal randomNoGeneration = new BigDecimal(Math.random()); // between 0 to < 1.0
        BigDecimal actualRandonNo = randomNoGeneration.multiply(rangeInBD);
        return actualRandonNo.setScale(2, BigDecimal.ROUND_HALF_UP);

    }

MongoDB windows 8 installation

• Download from https://fastdl.mongodb.org/win32/mongodb-win32-x86_64-2008plus-2.6.4-signed.msi?_ga=1.92201882.1006826747.1412750869
• Install downloaded msi
• Move installed directory from default location C:\Program Files\MongoDB 2.6 Standard to your user defined location, something without space in naming convention, this is a good practice. Copying the installed folder to another location will not create any issue as MongoDB is self-contained and does not have any other system dependencies. For example: C:\poc\mdb\MongoDB_2.6_Standard
• Create a  mongo.cfg file with content:

##store data here (make sure you have manually created following directory)
dbpath=C:\poc\mdb\data

##all output go here (make sure you have manually created following directory)
logpath=C:\poc\mdb\log\mongo.log

• Open command prompt (WIN +X ) and open Comman Prompt (Admin)
• Type following:

sc.exe create MongoDB binPath= "\"C:\poc\mdb\MongoDB_2.6_Standard\bin\mongod.exe\" --service --config=\"C:\poc\mdb\mongod.cfg\"" DisplayName= "MongoDB_2.6_Standard" start= "auto" 

• MongoDB service is successfully installed if you see following msg:

[SC] CreateService SUCCESS

• Start MongoDB service:

net start MongoDB

• To stop MongoDB service:

net stop MongoDB

• To delete MongoDB service

sc.exe delete MongoDB

Source: http://www.mongodb.org