Notifier:

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Description:

A notification microservice which is responsible for storing/retrieving/caching notifications.

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Architecture:

1- Config File:

    a- IP / Port : for external system
    b- Rotation Policy (when to remove from Redis Cache) : 
	      i. Time Based : eg. every 20 min
	      ii. Retrieval (when data retrieved from Redis remove it assuming that it was read by user)	
	      iii. mixed
    c. DataBaseConfigPath :
	      i. IP
	      ii. Port
	      iii. Credentials
	      iv. Name
    d. Redis Config
      	i. Host

2- External System:

    As was specified in web com.linkedin.replica.services.

3- Redis:

    a. Caching most recent notifications that did not marked as read.
    b. Storage Model can be done using Redis Hashes. Hashes are a very convenient data type when you want
       to access object’s properties individually since you do not need to retrieve the whole object.	      

// Example for Redis Hashes
jedis.hset("user#1", "sender", "Peter");
String name = jedis.hget("user#1", "sender");

4- Database:

    Storing data as was specified in Notifications.json.