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Question about PetStore pattern using  RSS feed

James Liu
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Today when I looked at petstore source code, I found this:
1. When signonEJB sessionbean calls the UserEJB entitybean local interface, it just simply lookup, it did not use serviceLocator.
2 .Then I found when shoppingClientFacadeLocalEJB session lookup the Customer entitybean, it uses serviceLocator.
3. Then I check the CORE PATTERN books, from the UML, it looks like if you try to lookup the sessionfacade from outside EJB container , using serviceLocator, if a sessionbean calls a entitybean, it does not use serviceLocator.
So anybody can explain this, I am really confuse by this. I am so suprised about this, before I thought we should always use serviceLocator whenever you try to lookup a EJB, I have been using this for a while in our project.
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