Support for Redis client side caching

[jaspreetsingh96]

Is support for storing data locally provided so that number of calls to redis can be reduced while using spring-session-data-redis?

[eleftherias]

@jaspreetsingh96 Could you elaborate on what you mean by storing data locally?

[jaspreetsingh96]

@eleftherias Instead of retrieving session details from redis everytime, is there a configuration to store data in local map/cache so that the number of calls(for reading data) to redis can be reduced and only if data isn't available in the local map/cache the call to redis is made.

[eleftherias]

@jaspreetsingh96 This is not supported because it doesn't fit with Spring Session's support for session clustering.

Consider you have 2 instances of your application.

If the session is updated in instance1 and in Redis, then the data in instance2 will be out of date if it does not retrieve it from Redis.

If you only have a single instance of your application and you need this functionality, you can implement a custom SessionRepository .

[codecracker2014]

@eleftherias in case of session update invalidation messages can be sent via pub sub channel to keep updated data in all the nodes.
With this type of implementation we can reduce nw calls to redis for each request.
Something like following implementation provided by redission : https://github.com/redisson/redisson/wiki/7.-distributed-collections#711-map-eviction-local-cache-and-data-partitioning

Using getLocalCachedMap() method which publish updates to other nodes.