Use FutureTask and Callable with Multithreading to Boost Your Java Application Performance

Multithreading Lifecycle

Here I have a sample Spring Boot Web application to get user information. Essentially there are three classes that matter:

UserController.java

This is a RestController class which has a rest endpoint “/GetUserInfo” with RequestParam “userId”. This will return the user information of the particular userId.

@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/GetUserInfo")
    public Object getUserInfo(@RequestParam("userId")long userId){
        return userService.getUserInfo(userId);
    }
}

UserService.java

UserService contains business logic to fetch the necessary user information. Here, for demo purposes, I am getting userName, userMoney and userCountry. Each information is fetched and passed as a JSONObject. Then we combine all the pieces into one JSONObject result and return it. At the end of the program, the total time consumed for getting user information is printed.

@Service
public class UserService {

    @Autowired
    private RemoteService remoteService;

    public Object getUserInfo(long userId) {
        long currentTimeMillis = System.currentTimeMillis();

        //1. Use userName…