DDD Where to put image conversion

Question

I'm have application that gets image in binnary format. Then this application must convert this image to specific dimmension and save both form (orginal and specific) to disk. In this case application must store info about this picture in database too.

Where put the logic of conversion: in application layer, in domain layer or maybe in infrastructure layer?

score 0 · Answer 1 · edited May 23 '17 at 11:47

0

Hmm - possibly a duplicate of this question? have a look and see what you think: convert of the object (image) to another object (Byte) in three layers(3-tier)

edited May 23 '17 at 11:47

Community

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answered Dec 16 '10 at 20:59

Adrian K

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score 0 · Answer 2 · edited Apr 16 '11 at 09:04

0

«Service» seems to be a good fit given your context: http://dddcommunity.org/node/125

edited Apr 16 '11 at 09:04

Tristan

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answered Dec 16 '10 at 21:42

Martin R-L

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Yes, but where put this service? In application, domain or infrastructure layer? – Sławomir Rosiek Dec 17 '10 at 18:32

score 0 · Accepted Answer · answered Jan 03 '11 at 08:25

You should put conversion logic into infrastructure layer unless Your domain is about converting images.

Something like this:

//domain
public class Image{
  public Image(string fileName){
    FileName=fileName;
  }
  public string FileName{get;private set;}
}

//infrastructure
public class ImageConvertor:ICanConvertImages{
  public byte[] BmpToJpeg(byte[] img){
    throw new NotImplementedException("haa haa");
  }
}

//application
var bmpImg=PullBytesFromNowhere();
var jpegImg=convertor.BmpToJpeg(img);
var fileName=SaveToFile(jpegImg);
var image=new Image(fileName);

DDD Where to put image conversion

3 Answers3