CODEWITHSUNDEEP
javaspringspring-bootexception
Adler auf Höhenflug
Adler auf Höhenflug

Reputation: 29

Spring Boot Exception Handler get all Exceptions at once

Is there a way to catch all exceptions at once that are thrown from a web request in a Spring Boot Exception Handler? I know I can catch an array of Exception types in my method annotated with @ExceptionHandler but it's not the types I'm talking about. I need something like a list of Exception objects. I already tried

@@ExceptionHandler({ MethodArgumentTypeMismatchException.class, ConstraintViolationException.class })
@ResponseBody
private Error handleException(final List<Exception> ex, WebRequest request) {
...
}

but Spring is not able to find a suitable resolver for that:

java.lang.IllegalStateException: Could not resolve parameter [0] in private com.example.demo.model.Error com.example.demo.exception.MyExceptionHandler.handleException(java.util.List<java.lang.Exception>,org.springframework.web.context.request.WebRequest): No suitable resolver

With catching only one Throwable object it works fine:

@ExceptionHandler({ MethodArgumentTypeMismatchException.class, ConstraintViolationException.class })
@ResponseBody
private Error handleException(final Exception ex, WebRequest request) {
...
}

But what to do if I have different parameter violations like e.g. a ConstraintViolationException and a MethodArgumentTypeMismatchException in the same request?

If it's not possible to process a list of exceptions, how can I satisfy RFC-7807 (see https://www.rfc-editor.org/rfc/rfc7807)? Which means: How can I collect all invalid parameters, no matter what's the causing exception?

Upvotes: 0

Views: 3017

Answers (2)

Smoljanov Sergej
Smoljanov Sergej

Reputation: 51

https://docs.spring.io/spring-framework/docs/current/reference/html/web.html#mvc-ann-exceptionhandler

@ExceptionHandler
public ResponseEntity<String> handle(Exception ex) {
    // ...
}

you will catch most general exception. Then you can get suppressed https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getSuppressed()

you cant throw more than one exception at once

Upvotes: 1

k-wasilewski
k-wasilewski

Reputation: 4623

I don't know about the annotation, but to catch multiple exceptions you do (remember that the first matching catch block will execute):

@ResponseBody
public MyError handleException(List<Throwable> exceptions, WebRequest request) {
    try {
        //...
    } catch (ConstraintViolationException e) {
        //...
    } catch (MethodArgumentTypeMismatchException e) {
        //...
    }
}

Upvotes: 0

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