Use Redis multiple get operation

[ceremo]

Redis repositories are based on KeyValueRepository, this interface defines Iterable<T> findAllById(Iterable<ID> ids), and the implementation defines a loop executing a findById per id (SimpleKeyValueRepository), but Redis could instead use the operation MGET to execute in a single request to the Redis server all requested ids.

Have you analyzed this alternative? Or maybe adding an extra method like Iterable<T> multiFindById(Iterable<ID> ids) taking advantage of the operation MGET?

Thanks for your time.

[dfidalgo-jpm]

Hello, I'm interested in this. I am using spring-data-redis repositories and findAllById is very slow. As I cannot use MGET for that, I switched to something like:

redisTemplate.executePipelined { connection: RedisConnection ->
                val serializer = redisTemplate.stringSerializer

                for (key in keys) {
                    serializer.serialize(key)?.let { connection.hashCommands().hGetAll(it) }
                }
                null
            } 

But it would be nice if it was backed in the provided repositories.