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1. Distributed database will contain (key, value) pairs, representing the edges in friendship graph.
- kzr.buet08 December 20, 20162. For every things(post) we will keep a observer list(implement observer pattern), containing the list of people who already liked it.
3. Now when a new observer register to the list, loop over existing observers and check from the distributed db which pair is actually friends and send the notification accordingly.