Try the EJB Design Patterns book (free download @ TheServerSide) and/or Professional
Struts Applications source code (also avaliable online from Wiley or Apress, don't
remember) You'll have to code most of it, but it will give more control and
understanding of how things work.
Good Luck!
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I think that what you're tryin' to do is implemented in the examples from the
Professional Struts Applications book... you might want to look @ the source code from
the book and pay special attention to the ServiceLocator pattern implementation.
Good Luck!
PS: you can also try the EJBHomFactory