poc-client-side-caching

This is a CLI-based project that serves as poc for client-side caching implementation using Redis

There are two command that can be used:

Command Format	Note
get <key>	Get value of key <key>
set <key> <value>	Set value of <value> to key <key>

Pre-requisites

• Go version >= 1.14.0
• Redis version >= 6.0
• Redis CLI

Step-by-step

1. Run redis on your local machine

   redis-server
   

2. On another tab, run poc-CLI

   go run .
   

3. Try get value with key key. If key not exist, you will be notified as follows

   > get key
   2022/07/15 11:38:13 got no value from anywhere
   <nil>
   

4. On another tab, open Redis CLI. Try assign value to key

   ~ % redis-cli
   127.0.0.1:6379> set key value
   OK
   

5. Now key exist in Redis. Try get key using poc-CLI again. You will be notified that data retrieved from Redis

   > get key
   2022/07/15 11:43:43 got value from redis
   value
   

6. After retrieving data from Redis, data is stored on local memory. Get the value of key again. You will be notified that data retrieved from memory

   > get key
   2022/07/15 11:45:12 got value from memory cache
   value
   

7. Go back to Redis CLI tab. Try assigning new value to key

   127.0.0.1:6379> set key value2
   OK
   

8. Go back to poc-CLI tab. You will be notified that there are change in value for key, thus local memory cache for key is renewed

   > 
   refresh memory cache for key key
   key refreshed
   

9. If you try get key value again, you will notice that the value came from local memory cache. Local cache has been updated, so the data will be same as current data on Redis

   > get key
   2022/07/15 11:50:31 got value from memory cache
   value2
   

poc-CLI is also equipped with set command. You can try similar steps mentioned above by using two process of poc-CLI

Related documents

• Redis client-side caching: https://redis.io/docs/manual/client-side-caching/
• Go package that support client-side caching: https://github.com/rueian/rueidis
• Practical example using redis-cli: https://www.linode.com/docs/guides/redis-client-side-caching/