Missing linkTo and methodOn declarations Spring HATEOAS STS

Question

I am following Spring RESTfull API tutorial. The tutorial asks to use Spring HATEOAS at some point. However, my IDE, STS, cannot find the references of the methods, linkTo and methodOn.

@GetMapping("/employees/{id}")
Resource<Employee> one(@PathVariable Long id) {
 Employee emp = repository.findById(id)
  .orElseThrow(() -> new EmployeeNotFoundException(id));

 return new Resource<>(emp,
        linkTo(methodOn(EmployeeController.class).one(id)).withSelfRel(),
        linkTo(methodOn(EmployeeController.class).all()).withRel("employees")
 );
}

Spring HATEOAS dependency is also here:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-hateoas</artifactId>
    </dependency>

The things I have tried:

• Updating maven project

Answer 1

I am following the same tutorial and came across the same problem with the methods "linkTo" and "methodOn".

It seems like the import should be from:

import static org.springframework.hateoas.server.mvc.ControllerLinkBuilder.*;

However, it seems it is already deprecated and there is now WebMvcLinkBuilder suggested to be used:

import static org.springframework.hateoas.server.mvc.WebMvcLinkBuilder.*;

I found clues in this class: https://github.com/spring-projects/spring-hateoas-examples/blob/master/simplified/src/main/java/org/springframework/hateoas/examples/EmployeeController.java

More over, at the bottom of the tutorial page there is a link to the GitHub repo of complete project: https://github.com/spring-guides/tut-rest

I also found problems running the "LoadDatabase.java" when following the tutorial. To fix this, I had to make it implement the CommandLineRunner and put the original code inside it's run method:

@Component
public class LoadDatabase implements CommandLineRunner {

    private static final Logger log = LoggerFactory.getLogger(LoadDatabase.class);

    @Override
    public void run(String... args) throws Exception {

        employeeRepository.save(new Employee("Bilbo", "Baggins", "burglar"));
        employeeRepository.save(new Employee("Frodo", "Baggins", "thief"));

        employeeRepository.findAll().forEach(employee -> log.info("Preloaded " + employee));

        orderRepository.save(new Order("MacBook Pro", Status.COMPLETED));
        orderRepository.save(new Order("iPhone", Status.IN_PROGRESS));

        orderRepository.findAll().forEach(order -> {
            log.info("Preloaded " + order);
        });
    }

    @Autowired
    EmployeeRepository employeeRepository;
    @Autowired
    OrderRepository orderRepository;
}