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@Service
public class EmployeeService {

    private final EmployeeRepository employeeRepository;

    @EventListener(ApplicationReadyEvent.class)
    public void test() {
        testSelfInvocation();
    }

    @Transactional
    public void testSelfInvocation() {
        Employee emp1 = new Employee("Henry", "Ford", 22);
        employeeRepository.save(emp1);             
        BigDecimal.ONE.divide(BigDecimal.ZERO);
        Employee emp2 = new Employee("John", "Wick", 33);
        employeeRepository.save(emp2);
    }
}