[Moving Brick-2] Cache those things

• Local cache (ehcache, GuavaCache, Caffeine)
  • advantage:
  1. No network I/O overhead
  2. Fast memory read speed
  • Disadvantages:
  1. Limited memory and limited data storage
• Distributed cache (redis, memcached)
  • advantage:
  1. Can expand infinitely
  2. Support multi-node use
  • Disadvantages:
  1. The delay caused by network I/O cannot be ignored