Java 如何处理延迟中的异常导致Spring启动?
我有一个休息的方法:Java 如何处理延迟中的异常导致Spring启动?,java,spring,spring-boot,nonblocking,Java,Spring,Spring Boot,Nonblocking,我有一个休息的方法: @RequestMapping(value = "wash/washHistory", method = RequestMethod.GET, produces = "application/json;charset=UTF-8") @ResponseBody public DeferredResult<String> getWashHistory(@RequestParam(value = "sid", required = true, def
@RequestMapping(value = "wash/washHistory", method = RequestMethod.GET, produces = "application/json;charset=UTF-8")
@ResponseBody
public DeferredResult<String> getWashHistory(@RequestParam(value = "sid", required = true, defaultValue = "") String sid,
HttpServletResponse response, HttpServletRequest request,
@RequestParam(value = "sort", defaultValue = "") String sortType,
@RequestParam(value = "order", defaultValue = "") String order,
@RequestParam(value = "limit", defaultValue = "") String limit,
@RequestParam(value = "offset", defaultValue = "") String offset) {
System.out.println("Thread: "+Thread.currentThread());
final Integer managerId = checkSession(sid);
DeferredResult<String> defResult = new DeferredResult<>();
new Thread(() -> {
final String result = washController.getWashHistory( managerId, order, sortType, limit, offset);
defResult.setResult(result);
}).start();
return defResult;
}
为了处理此异常,我使用以下类:
@ControllerAdvice
@EnableWebMvc
public class GlobalExceptionHandler {
@ExceptionHandler(value = InvalidUserInputException.class)
public ResponseEntity<String> invalidUserInputExc(InvalidUserInputException e) {
logger.log("GMoika", e.error().getClassName(), e.error().getMethodName(), e.error().getParams(), e.error().getCause());
return ResponseEntity.
status(HttpStatus.BAD_REQUEST).
body(e.error().getErrorCode());
}
}
但这并不是我想要的,因为我抛出了自己的异常,并使用特定的构造函数在抛出该异常的类中编写原因。
在我的GlobalExceptionHandler类中,是否有任何其他可能的方法来处理DelferredResult中的异常?
DelferredResult
具有方法setErrorResult
,该方法可以根据以下条件处理异常:
该值可以是异常值或可丢弃值,在这种情况下将是异常值
处理过程就像处理程序引发异常一样
@在大多数情况下,jny的决定是正确的,但对我来说,我找到了另一种方法 在我的rest控制器中,我添加了以下代码:
new Thread(() -> {
Thread.currentThread().setUncaughtExceptionHandler(new SeparateThreadsExceptionHandler(defResult));
final String result = washController.getWashHistory(managerId, order, sortType, limit, offset);
defResult.setResult(result);
}).start();
和一个SeparateThreadsExceptionHandler类:
public class SeparateThreadsExceptionHandler implements Thread.UncaughtExceptionHandler{
private DeferredResult<String> dr;
public SeparateThreadsExceptionHandler(DeferredResult<String> dr){
this.dr = dr;
}
@Override
public void uncaughtException(Thread t, Throwable e) {
if(e instanceof InvalidUserInputException){
InvalidUserInputException throwableException = (InvalidUserInputException)e;
dr.setResult(throwableException.error().getErrorCode());
} else {
dr.setResult(UnknownException.UNKNOWN_ERROR_CODE);
}
}
}
公共类SeparateThreadsExceptionHandler实现Thread.UncaughtExceptionHandler{
私人延迟结果dr;
public SeparateThreadsExceptionHandler(延迟结果dr){
this.dr=dr;
}
@凌驾
公共无效未捕获异常(线程t,可丢弃的e){
if(例如InvalidUserInputException的实例){
InvalidUserInputException throwableException=(InvalidUserInputException)e;
dr.setResult(throwableeexception.error().getErrorCode());
}否则{
dr.setResult(未知异常。未知错误代码);
}
}
}
当抛出自定义异常时,我可以将一些字符串错误消息设置为DeferredResult。在我的示例中,它是前端的错误代码
在我的GlobalExceptionHandler类中,有没有其他可能的方法来处理DelferredResult中的异常
我使用了@jny指出的setErrorResult
方法
以下是我的控制器方法的主体:
DeferredResult<Wrapper<Object>> deferredResult = new DeferredResult<>();
ForkJoinPool.commonPool().submit(() -> {
try {
Wrapper<Object> response = ...
deferredResult.setResult(response);
} catch (Exception e) {
deferredResult.setErrorResult(e);
}
});
return deferredResult;
DeferredResult-DeferredResult=new-DeferredResult();
ForkJoinPool.commonPool().submit(()->{
试一试{
包装器响应=。。。
deferredResult.setResult(响应);
}捕获(例外e){
延迟结果。设置错误结果(e);
}
});
返回延迟结果;
在这种情况下,新线程中抛出的异常被传递到global@ExceptionHandler这不是我想要的,因为我的GlobalExceptionHandler中有一些业务逻辑,因此我需要处理这个类中的异常。我相信这正是将要发生的。将在
setErrorResult
中设置的异常将由您的GlobalExceptionHandler
处理。谢谢,但我找到了另一种方法=)
public class SeparateThreadsExceptionHandler implements Thread.UncaughtExceptionHandler{
private DeferredResult<String> dr;
public SeparateThreadsExceptionHandler(DeferredResult<String> dr){
this.dr = dr;
}
@Override
public void uncaughtException(Thread t, Throwable e) {
if(e instanceof InvalidUserInputException){
InvalidUserInputException throwableException = (InvalidUserInputException)e;
dr.setResult(throwableException.error().getErrorCode());
} else {
dr.setResult(UnknownException.UNKNOWN_ERROR_CODE);
}
}
}
DeferredResult<Wrapper<Object>> deferredResult = new DeferredResult<>();
ForkJoinPool.commonPool().submit(() -> {
try {
Wrapper<Object> response = ...
deferredResult.setResult(response);
} catch (Exception e) {
deferredResult.setErrorResult(e);
}
});
return deferredResult;