Externalize application properties in a Grails app

Externalizing properties of an application has really come a long way, especially if you are using Grails.

Just want to share as a quick tip how easy it is to externalize the properties in a Grails application.

This is what all we have to do in-order to get something from a properties file.

In config.groovy include the properties that you want to be outside your groovy code.

For Example :

smtpUserName = "<someid@test.com>"

hostname = "yourHostName"

In order to read these properties in your Grails controller:

def smtpUserName = grailsApplication.config.smtpUserName

In order to read the properties from Grails Service class:

def smtpUserName =  ConfigurationHolder.config.smtpUserName

Easy, isn’t it?