AppWideExceptionHandler.java

package com.embula.embula_backend.advisor;

import com.embula.embula_backend.exception.NotFoundException;
import com.embula.embula_backend.util.StandardResponse;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;

import java.util.HashMap;
import java.util.Map;

@RestControllerAdvice
public class AppWideExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(NotFoundException.class)
    public ResponseEntity<StandardResponse> handleNotFoundException(NotFoundException e) {
        return new ResponseEntity<>(
                new StandardResponse(404, "Not Found", e.getMessage()),
                HttpStatus.NOT_FOUND
        );
    }

    @Override
    protected ResponseEntity<Object> handleMethodArgumentNotValid(
            MethodArgumentNotValidException ex,
            org.springframework.http.HttpHeaders headers,
            org.springframework.http.HttpStatusCode status,
            WebRequest request) {
        Map<String, String> errors = new HashMap<>();
        ex.getBindingResult().getAllErrors().forEach((error) -> {
            String fieldName = ((FieldError) error).getField();
            String errorMessage = error.getDefaultMessage();
            errors.put(fieldName, errorMessage);
        });
        return new ResponseEntity<>(errors, HttpStatus.BAD_REQUEST);
    }

    @ExceptionHandler(Exception.class)
    public ResponseEntity<StandardResponse> handleGlobalException(Exception ex, WebRequest request) {
        // Log the actual exception for debugging
        System.err.println("=== Global Exception Handler ===");
        System.err.println("Exception Type: " + ex.getClass().getName());
        System.err.println("Exception Message: " + ex.getMessage());
        ex.printStackTrace();

        return new ResponseEntity<>(
                new StandardResponse(500, "Internal Server Error", ex.getMessage()),
                HttpStatus.INTERNAL_SERVER_ERROR
        );
    }
}