Question

我想在服务器启动之前调用所有请求映射方法（具有@Resource注入）。我怎么能这样做？

@Controller
public class ServiceController {
     @Resource(name="userService")
     private IUserService userService;  

     @RequestMapping("/getAllCountry")
     public String getAllCountry() {
        return   userService.getAllCountry();
     }
      @RequestMapping("/getAllStates")
     public String getAllStates() {
        return   userService.getStates();
     } 
      @PostConstruct
      public void cacheData(){
         cache.put("ALL_COUNTRY_DATA", getAllCountry());
         cache.put("ALL_STATE_DATA", getAllStates());
      }
}

上面的代码失败并给我IllegalStateException。在服务器启动并填充缓存之前调用请求映射方法的最佳方法是什么。

Answer 1

尝试将ApplicationListener与ContextRefreshedEvent结合使用：

@Controller
public class ServiceController implements ApplicationListener<ContextRefreshedEvent> {

    private static final Map<String, String> cache = new HashMap<>();

    @Resource(name = "userService")
    private IUserService userService;

    @RequestMapping("/getAllCountry")
    public String getAllCountry() {
        return userService.getAllCountry();
    }

    @RequestMapping("/getAllStates")
    public String getAllStates() {
        return userService.getStates();
    }

    public void cacheData() {
        cache.put("ALL_COUNTRY_DATA", getAllCountry());
        cache.put("ALL_STATE_DATA", getAllStates());
    }

    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        cacheData();
    }
}

Spring控制器中的缓存填充

1 个答案: