[Mastering Spring 5.0] 6.1 예외처리

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{
    "timestamp": "2018-12-07T05:01:26.483+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "Some Exception Occurred",
    "path": "/users/dummy-service"
}

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package com.mastering.spring.springboot.exception;

public class TodoNotFoundException extends RuntimeException {
    public TodoNotFoundException(String msg) {
        super(msg);
    }
}

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package com.mastering.spring.springboot.bean;
import java.util.Date;

public class ExceptionResponse {
    private Date timestamp = new Date();
    private String message;
    private String details;
    public ExceptionResponse(String message, String details) {
        super();
        this.message = message;
        this.details = details;
    }
    public Date getTimestamp() {
        return timestamp;
    }
    public void setTimestamp(Date timestamp) {
        this.timestamp = timestamp;
    }
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
    public String getDetails() {
        return details;
    }
    public void setDetails(String details) {
        this.details = details;
    }
}

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@ControllerAdvice
@RestController
public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
    @ExceptionHandler(TodoNotFoundException.class)
    public final ResponseEntity<ExceptionResponse> todoNotFound(TodoNotFoundException ex) {
        ExceptionResponse exceptionResponse = new ExceptionResponse(ex.getMessage(), "Any details you would want to add.");
        return new ResponseEntity<ExceptionResponse>(exceptionResponse, new HttpHeaders(), HttpStatus.NOT_FOUND);
    }
}

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@ExceptionHandler(Exception.class)
public ResponseEntity<ExceptionResponse> defaultError(Exception ex) {
    ExceptionResponse exceptionResponse = new ExceptionResponse(ex.getMessage(), "알수없는 에러...");
    return new ResponseEntity<ExceptionResponse>(exceptionResponse, new HttpHeaders(), HttpStatus.INTERNAL_SERVER_ERROR);
}

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@ResponseStatus(HttpStatus.NOT_FOUND)
public class TodoNotFoundException extends RuntimeException {
    public TodoNotFoundException(String msg) {
        super(msg);
    }
}