多線程異步提高web服務核心代碼

package com.userpart.controller;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.FutureTask;
import java.util.concurrent.ThreadPoolExecutor;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping(value = "/user")
public class UserController {

	@Autowired
	private RestTemplate restTemplate;

	ExecutorService poor = Executors.newFixedThreadPool(10);
	@GetMapping(value = "server")
	public String getUser(HttpServletRequest req) {
		
		Callable<String> call1 = new Callable<String>() {
			@Override
			public String call() throws Exception {
				return restTemplate.getForObject("http://localhost:8090/order/server", String.class);
			}
		};
		Callable<String> call2 = new Callable<String>() {
			@Override
			public String call() throws Exception {
				return restTemplate.getForObject("http://localhost:8099/commod/server", String.class);
			}
		};
		
		
		FutureTask<String> task1 = new FutureTask<String>(call1);
		FutureTask<String> task2 = new FutureTask<String>(call2);
		
		poor.submit(task1);
		poor.submit(task2);
		
		String res = "";
		
		try {
			res += " user server..." ;
			res += task2.get();
			res += task1.get();
		} catch (InterruptedException | ExecutionException e) {
			e.printStackTrace();
		}
		return res;
	}
}