Synchronizing issues when several instances

Does casbin support working in several application instances or does it provide an interface to implement such?

Problem

Let us say we have 2 instances of API: API 1 and API 2. Each of these instances have casbin enforcer inside the application. So, we have casbin 1 in API 1 and casbin 2 in API 2.

Each of them are looking in the same collection in database. But, considering the implementation of casbin, it stores permissions/roles in memory.

It leads to the problem that can be reproduced by the following scenario:

• Developer grants a role to a user via API call to API 1.
• API 1 does make changes in casbin 1 instance and adapter stores the changes in database
• Though, API 2 and casbin 2 know nothing about recent change and use an out-of-date information from casbin 2 memory.

Any assumptions how it can be resolved?

[ghaiklor]

@hsluoyz I got a permission from our CTO to publish an adapter. The adapter I wrote fully tested and already being used in production. Though, we can do that somewhere in January, I need time for cleaning up the code, make required preparations for open-source it.

[hsluoyz]

That’s good news! Thank you for your support on Casbin 😃