How to create global variables in a Grails project

Question

What\'s the best practice of making a variable that would be accessible by almost all classes in a Grails project? Is there a config file that I can use for storage of that data

Answer 1

Your best bet is Config.groovy. Any class can access ConfigurationHolder.getConfig() which makes it global, and you can even have environment-specific values of your variable.

someVar = "foo"

environments {
   production {
      grails.serverURL = "http://www.changeme.com"
      someOtherVar = 1000
   }
   development {
      grails.serverURL = "http://localhost:8080/${appName}"
      someOtherVar = 100
   }
   test {
      grails.serverURL = "http://localhost:8080/${appName}"
      someOtherVar = 0
   }
}

Answer 2

With Grails 2.2

//In Config.groovy
myVar = '/My/Root/Images/Folder'

//In your Services/Controllers/etc..  
import grails.util.Holders
def grailsApplication = Holders.getGrailsApplication()

//access you variable
def myVar =  grailsApplication.config.myVar;