Stateless services ora nyimpen client state antarane requests (saben request independent), dene stateful services maintain state. Statelessness penting banget kanggo scalability — stateless services luwih gampang di-scale horizontally.
Stateless vs stateful
STATELESS → the service keeps NO client state between requests:
→ each request contains all needed info; any server can handle any request
→ state lives ELSEWHERE (database, cache, client, token) if needed
STATEFUL → the service MAINTAINS state across requests:
→ a specific server holds a client's state (session in memory, etc.)
→ requests must go to the SAME server (or state must be shared/synchronized)
