CODEWITHSUNDEEP
javaspringrestspring-bootexception
Rafael Paz
Rafael Paz

Reputation: 537

How to throw same exception thrown by external endpoint in springboot

I'm accessing an external api and I'm expecting to get an image as response (byte[]). My method that connects to this endpoint looks like this:

 private byte[] retrieveImage(String uri) {
     byte[] imageBytes = null;
     try {
            URL url = new URL(uri);
            BufferedImage bufferedImage = ImageIO.read(url);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(image, "png", baos);
            imageBytes = baos.toByteArray();
        } catch (Exception ex) {
            throw new ImageNotReadException(ex.getLocalizedMessage());
        }
        return imageBytes;
    }

It turned out that if I pass the wrong parameters to the target endpoint I get this error message: enter image description here

So basically I would like to throw the same error above but I also would like to throw an ImageNotReadException (java.lang.IllegalArgumentException: image == null! ) in case the program fails to read the image (byte[]). So basically, my method private byte[] retrieveImage(String uri) would have to throw my read image exception and the endpoint response exception.

Any tips? Appreciate the help!

Upvotes: 0

Views: 887

Answers (1)

sampathpremarathna
sampathpremarathna

Reputation: 4064

As i have commented see below options

private Response retrieveImage(String uri) {
     byte[] imageBytes = null;
Response r=new Response();
     try {
            URL url = new URL(uri);
            BufferedImage bufferedImage = ImageIO.read(url);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(image, "png", baos);
            imageBytes = baos.toByteArray();
            r.setImage(imageBytes);
            r.setStatus(1);
        } catch (Exception ex) {
            r.setStatus(0);
        }
        return r;
    }

Response :

class Response{ 
String status;
byte[] image;

//getters setters
}

Or :

  private Response retrieveImage(String uri)throws CustomException {
         byte[] imageBytes = null;
         try {
                URL url = new URL(uri);
                BufferedImage bufferedImage = ImageIO.read(url);
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                ImageIO.write(image, "png", baos);
                imageBytes = baos.toByteArray();
            } catch (Exception ex) {
                throw new CustomException(ex.getLocalizedMessage());
            }
            return imageBytes;
        }

Upvotes: 1

Related Questions