How to call another api from same app in spring boot

Question

I have two RestControllers for user and Company.

• CompanyController: fetch from and store company information to companies table using service and repo level.

• UsersController : It is used to fetch and store users.

• Relationship: Each user is associated with company(User hasOne company).

When new User get registered, we need to fetch company information by id and associate with user profile.

For this, I have one endpoint in CompanyController, named getCompanyInfo. I have to call that endpoint to fetch company data while saving user profile.

How to call another API from same app in Spring Boot?

Answer 1

Why not are you calling Company service directly(if both controller exists in same application)? It will be more faster than calling company controller.

Your controller will look like this:

@RestController
public class UsersController {
    @Autowired
    private CompanyService companyService;

    @RequestMapping("/register")
    public ResponseEntity<User> registerUser(){
        //Do whatever you want
        CompanyInfo companyInfo = companyService.getCompanyInfo();
       //Do whatever you want
    }
}

If you still want to directly call Company Controller, then you can do something like this:

@RestController
public class UsersController {
    @Autowired
    private RestTemplate template;

    @RequestMapping("/register")
    public ResponseEntity<User> registerUser(){
        ResponseEntity<CompanyInfo> companyInfoResponse = template.getForObject("Url for getCompanyInfo() method", CompanyInfo.class);
        CompanyInfo companyInfo = companyInfoResponse.getBody();
        //Do whatever you want
    }
}