CallOracleStoredProcedureFromKotlin.kt

@SpringBootApplication
@EnableTransactionManagement
class HibernateStoredProcedureApplication : SpringBootServletInitializer(){
    @Bean
    fun sessionFactory(factory:HibernateEntityManagerFactory)  = factory.sessionFactory
}

fun main(args: Array<String>) {
    runApplication<HibernateStoredProcedureApplication>(*args)
}

@Service
class SampleService(val sessionFactory:SessionFactory) {
    @Transactional
    fun sampleMethod() {
        (sessionFactory.currentSession as SessionImpl).connection().prepareCall("{call storedProcedureName()}").execute()
    }
}