How to handle 404 error for amazon s3 bucket in my spring boot code

Question

I have actually a problem within my spring-boot application i developed a restful api linked to an s3 bucket i've customized some exceptions but when i run my url to get an object that doesn't exsit in the console i saw this error exception in my console :

2019-07-25 09:06:45.733 ERROR 1 --- [-nio-443-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.amazonaws.services.s3.model.AmazonS3Exception: The specified key does not exist. (Service: Amazon S3; Status Code: 404; Error Code: NoSuchKey; Request ID: 60E24BCF6860FC66; S3 Extended Request ID: DUEnMWN7YZKug74Q15uHt4Zei3+a7SxTNYzoj99O0YW58WOwvkdM1kwYpcHrGJiTrLkRLOdUL5I=), S3 Extended Request ID: DUEnMWN7YPOAIZADg74Q15uHt4Zei3+a7SxTNYzoj99O0YW58WOwvkdM1kwYpcHrGJiTrLkRLOdUL5I=] with root cause

com.amazonaws.services.s3.model.AmazonS3Exception: The specified key does not exist. (Service: Amazon S3; Status Code: 404; Error Code: NoSuchKey; Request ID: 60E24BCF6860FC66; S3 Extended Request ID: DUEnMWN7YZKug74Q15uHt4ZDFSFSQSDei3+a7SxTNYzoj99O0YW58WOwvkdM1kwYpcHrGJiTrLkRLOdUL5I=)

So my question is how to perform customization to this error in 2 points:

Not having this error showing in the console (technically I don't mean change log parameters)
Handle this exception with some methods

Yogesh Prajapati Yogesh Prajapati · Accepted Answer · 2019-07-25T10:16:04

Write custom exception handler to capture your exceptions and do graceful things.

@ControllerAdvice
@RestController
public class CustomExceptionHandler extends ResponseEntityExceptionHandler {

    @ExceptionHandler(AmazonS3Exception.class)
    public final ResponseEntity<Object> handleAmazonS3Exception(AmazonS3Exception ex, WebRequest request) {
        ApiError apiError = new ApiError(UNPROCESSABLE_ENTITY, ex.getLocalizedMessage(), ex.getErrors());
        return new ResponseEntity<>(apiError, UNPROCESSABLE_ENTITY);
    }
}

Here, UNPROCESSABLE_ENTITY is a HttpStatus (org.springframework.http.HttpStatus)

Please change the code of method handleAmazonS3Exception(...) based on your requirement.

How to handle 404 error for amazon s3 bucket in my spring boot code

2 Answers