For web MVC Spring app should @Transactional go on controller or service?

Question

For WebApplicationContext, should I put @Transactional annotations in the controller or in services? The Spring docs have me a bit confused.

Here is my

Answer 1

Sometimes it is very convenient to have @Transactional controller methods, especially when performing trivial operations using Hibernate. To enable this using XML configuration, add this to your dispatch-servlet.xml:

    
  
  ..

The purpose of proxy-target-class is to use the CGLIB proxies which are required for AOP on controllers to work. If you don't add this, you'll get an error when starting up. Also, if you have any final methods in your controllers, note that they cannot be proxied (in particular, made transactional), and you will also get a warning from CGLIB for each of these methods, when starting up.