Next.js + Redis 캐싱

// lib/redis.ts
import { Redis } from '@upstash/redis'
export const redis = Redis.fromEnv()

// app/api/posts/route.ts
export async function GET() {
  const cached = await redis.get('posts:all')
  if (cached) return Response.json(cached)

  const posts = await db.post.findMany()
  await redis.set('posts:all', posts, { ex: 60 })
  return Response.json(posts)
}

// Server Action 캐싱
'use server'
export async function getCachedUser(id: string) {
  return unstable_cache(
    async () => db.user.findById(id),
    [`user-${id}`],
    { revalidate: 60 }
  )()
}