Grails grailsApplication null in Service , Controller

Environment:
  Grails on tomcat deployed as war

Reported Issue:
  grailsApplication is null

Error Messages:

Cannot get property 'config' on null object

Cause:

    The service is created in resources.groovy(BeanBuilder) rather than the default behavior of grails. This was done to inject a custom resource to the service.

Solution:
  Inject the grailsApplication in resources.groovy along with other dependencies.