GlobalExceptionHandler.java

package org.openpodcastapi.opa.advice;

import jakarta.persistence.EntityNotFoundException;
import lombok.RequiredArgsConstructor;
import lombok.extern.log4j.Log4j2;
import org.openpodcastapi.opa.exceptions.ValidationErrorResponse;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
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 java.time.Instant;
import java.util.List;

@RestControllerAdvice
@RequiredArgsConstructor
@Log4j2
public class GlobalExceptionHandler {
    @ExceptionHandler(EntityNotFoundException.class)
    @ResponseStatus(HttpStatus.NOT_FOUND)
    public ResponseEntity<String> handleEntityNotFoundException(EntityNotFoundException error) {
        log.debug("{}", error.getMessage());
        return ResponseEntity.notFound().build();
    }

    @ExceptionHandler(DataIntegrityViolationException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public ResponseEntity<String> handleDataIntegrityViolationException(DataIntegrityViolationException e) {
        return ResponseEntity.badRequest().body(e.getMessage());
    }

    @ExceptionHandler(IllegalArgumentException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public ResponseEntity<String> handleIllegalArgumentException(IllegalArgumentException e) {
        return ResponseEntity.badRequest().body(e.getMessage());
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<ValidationErrorResponse> handleValidationException(MethodArgumentNotValidException ex) {
        List<ValidationErrorResponse.FieldError> errors = ex.getBindingResult().getFieldErrors().stream()
                .map(fe -> new ValidationErrorResponse.FieldError(fe.getField(), fe.getDefaultMessage()))
                .toList();

        var body = new ValidationErrorResponse(
                Instant.now(),
                HttpStatus.BAD_REQUEST.value(),
                errors
        );

        return ResponseEntity.badRequest().body(body);
    }
}