?springcloud 實戰(zhàn) feign使用中遇到的相關問題


1.使用feign客戶端調用其他微服務時，session沒有傳遞成功，sessionId不一樣。

/*** @author xbchenf* @date 2018-10-27 16:35:52* @description 通過攔截器，將head補上，避免session丟失*/ @Configuration public class FeignConfiguration implements RequestInterceptor{private final Logger logger = LoggerFactory.getLogger(FeignConfiguration.class);@Overridepublic void apply(RequestTemplate template) {RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();if (requestAttributes == null) {return;}HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();Enumeration<String> headerNames = request.getHeaderNames();if (headerNames != null) {while (headerNames.hasMoreElements()) {String name = headerNames.nextElement();Enumeration<String> values = request.getHeaders(name);while (values.hasMoreElements()) {String value = values.nextElement();logger.warn("name:"+name+";value:"+value);template.header(name, value);}}}} }

　　

2.使用feign客戶端調用其他微服務時，發(fā)送POST請求時，對象信息沒有傳遞成功。

關鍵在于加上注解：@RequestBody

feign客戶端：

@FeignClient(name = "mpmt-user") public interface PersonFeignClient {@GetMapping("/feign/testGet/{id}")public ResponseEntity<JsonResult> testGet(@PathVariable(value = "id") Integer id);@PostMapping("/feign/testPost")public ResponseEntity<JsonResult> testPost(@RequestBody Person person); }

　　

微服務服務端：mpmt-user

@RestController @RequestMapping("/feign") public class FeignController {private final Logger logger = Logger.getLogger(FeignController.class);@GetMapping("/testGet/{id}")public ResponseEntity<JsonResult> testGet(@PathVariable(value = "id") Integer id,HttpServletRequest request) {JsonResult r = new JsonResult();try {logger.info("sessionid:"+request.getSession().getId());User user = (User)request.getSession().getAttribute("sessionUser");logger.info("userId:"+user.getId());r.setResult(user);r.setStatus("200");} catch (Exception e) {r.setResult(e.getClass().getName() + ":" + e.getMessage());r.setStatus("error");e.printStackTrace();}return ResponseEntity.ok(r);}/*** 添加用戶* 提供給后端feign調用的接口，post請求都要使用@RequestBody ，包括feign中定義的接口* @param person* @return*/@PostMapping("/testPost")public ResponseEntity<JsonResult> testPost(@RequestBody Person person,HttpServletRequest request) {JsonResult r = new JsonResult();try {logger.info("sessionid:"+request.getSession().getId());User user = (User)request.getSession().getAttribute("sessionUser");logger.info("userId:"+user.getId());r.setResult(person);} catch (Exception e) {r.setResult(e.getClass().getName() + ":" + e.getMessage());r.setStatus("error");e.printStackTrace();}return ResponseEntity.ok(r);}}

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3.使用feign客戶端調用其他微服務時，報錯超時：e=feign.RetryableException: Read timed out executing POST

ribbon.ReadTimeout=60000
ribbon.ConnectTimeout=60000

轉載于:https://www.cnblogs.com/brant/p/9864813.html

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