Java EE User Management Library [closed]

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I develop a fair number of Java EE apps for my clients and all of them involve the concept of user account creation, authentication and in some cases, authorization, organization hierarchies, etc.

I typically create (JPA) entities for users, organizations and setup their interrelations, writing EJB code for the workflow.

Is there a library or a framework that has already addressed this issue that I can re-use instead of having to build this setup anew for every new开发者_JAVA技巧 development?

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Some of the problems you descirbed are nicely solved with Spring security or JBoss Seam security module, I don't know spring but regarding the Seam module, you will find some examples in their repo on github.