Question

Currently I am working on a project with Spring web-service, hibernate and JAXb.

1) I have generated hibernate beans using IDE ‘hibernate code generation,

2) also, I have generated the jaxb beans using maven compiler.

..

Now, my question is,

1) Is this the right approach? (to have so many beans).

2) Shall I use JAXb beans for processing into the service layer? How can I keep layers decoupled?

3) Or, do I need to create another set of beans ie. map (JAXb beans) to (new beans) to (hibernate beans)?

.

Please tell your views?

Thanks,
adi

Answer 1

You know, you cannot have everything fully decoupled. There will be always a layer that will know the other two layers.

Usually when I design 3 layers architecture, like:

1. Service Layer – the one that probably uses JAXB, exposes web services or other APIs
2. Business Layer – any real logic
3. Persistence Layer – hibernate

I allow the Business layer to know about the Service Layer (JAXB) and about the Persistence Layer (hibernate beans). But I don’t allow the Service Layer and the Persistence Layer to know about each other.