(Quick Reference)
                create-service-class
Purpose
The 
create-service-class generates a service for a domain class
Examples
grails create-service-class Person
grails create-service-class "*"
Description
Given at least one domain class, this command creates a service for it.
Usage:
grails create-service-class [domainClass]
Arguments:
domainClass - Either a domain class name (case-sensitive) without its package or a wildcard (*). If you specify the wildcard the artifacts will be generated for all domain classes.