Domain:
class Person {
String name;
   static constraints = {
   }
}

Controller:
class PersonController {
    def scaffold = Person
}

dataSource:
    pooled: true
    jmxExport: true
    driverClassName: org.h2.Driver
    username: sa
    password:

environments:
    development:
        dataSource:
         dbCreate: update
         url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE