simple-repo.java

public class SimpleCustomerRepository implements CustomerRepository {

    @Override
    public Iterable<Customer> allCustomers() {
        SimpleCustomer customer1 = new SimpleCustomer(1, "John Doe");
        return Arrays.asList(customer1);
    }
}

public class SimpleOrderRepository implements OrderRepository {

    @Override
    public Iterable<Order> allOrders() {
        SimpleOrder order1 = new SimpleOrder(DateTime.now(), 4000);
        return Arrays.asList(order1);
    }
}