基于FeignClient提供简单的用户查询服务
前言：
由于系统升级，之前的员工数据库（mongo库）被弃用，改为用python维护的mysql库，其他系统访问通过http请求，表结构对外不可见，其他系统之前对员工mongo库的依赖要解除。每套系统都去写请求的接口太麻烦，所以打算写一个员工查询服务，http请求用原生的FeignClient实现。
实现思路：
场景：python端只提供了查询所有员工，其他系统请求多种多样。
解决：请求接口 --> 查询所有员工 --> FeignClient包装的http请求 --> 过滤条件
实现步骤演示：
- Feign包装的http请求：
1 /** 2 * 对外暴露接口. 3 */ 4 @FeignClient(name = XXXXClientConfig.APPLICATION_NAME, url = "https://xx.xxxx.com") 5 public interface IEmployService { 6 7 @RequestMapping(value = "/xx/employee/search", 8 headers = {"Content-Type=application/json", 9 "App-Id=xxx", 10 "App-Secret=xxxx"}) 11 @ResponseBody 12 ReturnUser getAllUser(@RequestBody GetAllUserForm getAllUserForm); 13 14 }
- 员工服务接口：
1 @FeignClient(XXXXConfig.APPLICATION_NAME) 2 public interface IUserService { 3 4 @RequestMapping(value = "/xxxx/getAll", method = RequestMethod.GET) 5 List<User> getAll(); 6 7 @RequestMapping(value = "/xxxx/getUserByIds", method = RequestMethod.POST) 8 List<User> getUserByIds(@RequestBody List<String> userIds); 9 10 @RequestMapping(value = "/xxxx/getById", method = RequestMethod.GET) 11 User getById(@RequestParam(value = "userId") String userId); 12 13 @RequestMapping(value = "/xxxx/getByQuery", method = RequestMethod.POST) 14 List<User> getByQuery(@RequestBody UserQuery userQuery); 15 }
- 员工服务实现：
1 @RestController 2 public class UserSearchService implements IUserService { 3 private final static Logger log = LoggerFactory.getLogger("xxx"); 4 private List<User> users = null; 5 private Long lastTime = null; 6 @Resource 7 private IEmployService employService; 8 9 @Override 10 public List<User> getAll() { 11 if(users != null && users.size() > 0 && lastTime != null && (System.currentTimeMillis() - lastTime) <= 1000*60*10){ 12 return users; 13 } 14 try { 15 GetAllUserForm form = new GetAllUserForm(); 16 form.setPageNo(1); 17 form.setPageSize(99999); 18 ReturnUser allUser = employService.getAllUser(form); 19 users = new ArrayList<>(); 20 allUser.getData().getRecords().forEach(returnUser -> { 21 User user = getUserFromReturnUser(returnUser); 22 users.add(user); 23 }); 24 lastTime = System.currentTimeMillis(); 25 return users; 26 }catch (Exception e){ 27 if(users.size() > 0){ 28 return users; 29 }else { 30 throw new RuntimeException("getAll(): user is null"); 31 } 32 } 33 } 34 35 @Override 36 public List<User> getUserByIds(@RequestBody List<String> userIds) { 37 List<User> all = getAll(); 38 List<User> users = all.stream().filter(user -> userIds.contains(user.getId())).collect(Collectors.toList()); 39 return users; 40 } 41 42 @Override 43 public User getById(@RequestParam(value = "userId") String userId) { 44 List<User> all = getAll(); 45 List<User> users = all.stream().filter(user -> user.getId().equals(userId)) 46 .collect(Collectors.toList()); 47 return users.size() == 1? users.get(0):null; 48 } 49 50 @Override 51 public List<User> getByQuery(@RequestBody UserQuery userQuery) { 52 List<User> list = new ArrayList<>(); 53 getAll().stream().filter(user -> { 54 if (CommonUtil.isNotBlank(userQuery.getName())) { 55 if (!userQuery.getName().equals(user.getName()) && 56 !userQuery.getName().equals(user.getRealName())) { 57 return false; 58 } 59 } 60 if (CommonUtil.isNotBlank(userQuery.getKeyword())) { 61 if (!user.getName().contains(userQuery.getKeyword()) && 62 !user.getRealName().contains(userQuery.getKeyword())) { 63 return false; 64 } 65 } 66 if (userQuery.getIds() != null) { 67 if (!userQuery.getIds().contains(String.valueOf(user.getNumber()))) { 68 return false; 69 } 70 } 71 return true; 72 }).forEach(user -> { 73 list.add(user); 74 }); 75 return list; 76 } 77 78 79 private User getUserFromReturnUser(Employee returnUser) { 80 User user = new User(); 81 user.setName(returnUser.getName()); 82 return user; 83 } 84 85 }
- springboot启动添加
1 @EnableFeignClients(basePackages = {XXXXClientConfig.PACKAGE_PATH})
