java - How to design user Authorisation -

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java - How to design user Authorisation -

i have database based user authorization roles. user have services can access , in each service user can see , actions. this, user==> services ==> roles. best design pattern can utilize in scenario. design roles , services stored in user context. every time user determines can see. if roles stored in service service can decide user authorized to. can tell improve approach , why?.

java design-patterns

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