CustomersResource#getCustomer

CustomersResource.java

public Customer getCustomer(@PathParam("id") long id, @Context UriInfo uriInfo) {
    Optional<Customer> customer = findCustomer(id);
    if (!customer.isPresent()) {
        throw new NotFoundException(
                String.format("No customer with id %d found. RequestUri was %s",
                id, uriInfo.getRequestUri()));
    }
    return customer.get();
}