Hi guys I have just upgraded to Spring 4 (.0.6) and for the most part this was painless. There is however one particular issue you need to be aware of.
When you are doing any kind of @Autowired for collection, you will need to properly specify the generic type, i.e. if you have an base class A and sub-classes B and C (as spring-components), you will now need to specify that you want a sub-class of A This was like this in the old Spring 3.x: @Autowired private List<A> listA = ... But now, you will have to do this: @Autowired private List<? extends A> listAImpl = ... I have fixed this where I saw it, but if there are any issues, please report back to me (or try and fix it, it's a very simple fix) Here are some articles about the new generic support: http://spring.io/blog/2013/12/03/spring-framework-4-0-and-java-generics http://www.intertech.com/Blog/spring-4-generic-qualifiers/ http://www.jayway.com/2013/11/03/spring-and-autowiring-of-generic-types/ -- Morten
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