Major Description
Ranger has very good fine-grained policy API with which user can define access control rules for any resource. But sometimes it is not human being but third party tools may use Ranger policy API to temporarily block or unblock user. The third party tool just wants to simply tell Ranger that "please block/unblock this user from accessing resource A" and the third party tool is not able to analyze the complicated scenarios as follows:
1. The exactly same rule already exists for resource A
2. The current rules for resource A includes the new rule implicitly
3. There is no any rules for resource A
If it's admin to operate the policy, admin can analyze policy semantics and will figure out it's to create a new policy or update an existing policy.
To better support integration from third party tool, Ranger can provide a higher level API which accepts request like "block user access to one resource" and internally figure out what policy to create/update.
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