PersonService.groovy

package codes.recursive.service

import codes.recursive.model.Person
import grails.gorm.services.Service
import grails.gorm.transactions.Transactional
import groovy.transform.CompileStatic

import javax.validation.constraints.NotNull

@CompileStatic
@Service(Person)
abstract class PersonService {
    abstract int count()
    abstract List<Person> findAll()
    abstract Person find(@NotNull Long id)
    abstract Person save(Person person)
}