java - Spring Boot 范围

Question

我正在尝试做类似以下的事情。我希望能够在 myController 中设置 infoVar 并在 MyResponseEntityExceptionHandler 中获取它。我尝试设置正确的范围(我认为是请求)，但我不断收到类似以下内容的错误:

Caused by: java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.

Controller

@RestController()
public class myController() {
  @Autowired private InfoVar infoVar;

  @PostMapping(path = "/stuff")
  public @ResponseBody sutff getStuff(@RequestBody String string)   throws Exception {
    infoVar.setVar("Test123");
    return stuff;
  }
}

错误处理

@ControllerAdvice
@RestController
public class MyResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {

    @Autowired private InfoVar infoVar

    @ExceptionHandler(Exception.class)
    public final ResponseEntity<Object> handleStuff(Exception ex, WebRequest request) {
        infoVar.getVar();
        return stuff;
    }
}

信息变量

@Component
@Scope("request")
public class InfoVar{
    private String infoVar;
getter and setter for infovar
}

Answer 1

我确实想出了一个解决方案，但我不喜欢它。我觉得应该有一种方法可以用 beans 来做到这一点，而不是添加到 WebRequest 中。

Controller

@RestController()
public class MyController() {

  @PostMapping(path = "/stuff")
  public @ResponseBody sutff getStuff(@RequestBody String string)   throws Exception {
    InfoVar infoVar = new InfoVar();
    infoVar.setVar("Test123");
    webRequest.setAttribute("infoVar", infoVar, WebRequest.SCOPE_REQUEST);
    return stuff;
  }
}

错误处理

@ControllerAdvice
public class MyResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(Exception.class)
    public ResponseEntity<Object> handleStuff(Exception ex, WebRequest request) {
        InfoVar infoVar = (InfoVar) request.getAttribute("infoVar", WebRequest.SCOPE_REQUEST);
        infoVar.getVar();
        return stuff;
    }
}

信息变量

public class InfoVar{
    private String var;
getter and setter for var
}