How to pass variable from @controller to @controlleradvice-CodePudding

right now I make custom handler using controlleradvice and is working well. I want to add additional info to the custom validation that "the invoice process has been failed". how do I achieve that ? thank you

CodePudding user response：

You can define you own exception object and uses it to pass the data from the controller method to the exception handler method.

First define an exception as :

public class InvoiceException extends RuntimeException {
   
    private Long invoiceId;
    private String additionalInfo;
}

Then in the controller if you check that if violates the related business rules, create an instance of this exception and throw it :

public class InvoiceController {

  
    @PostMapping("/invoice")
    public Long processInvoice(InvoiceRequest request){
       
          if(fail) {
             throw new InvoiceException(invoiceId, "foobar");
          }       
   }

}

In the @ContorllerAdvice , you can then access these data from the exception instance :

@ControllerAdvice
public class MyExceptionHandler {

 @ExceptionHandler(InvoiceException.class)
 public ResponseEntity<ErrorMessage> handle(InvoiceException ex) {
 
      
 }
}