System design URL shortener: Spring Boot 4.1.1, base62 ids, Redis cache-aside, Redis Lua token bucket, 24 tests and live transcripts

2026-10-22 08:13:35 +00:00
commit aa61ed8786
51 changed files with 1717 additions and 0 deletions
@@ -0,0 +1,5 @@
+created ArYvqWu with ttlSeconds=2
+t=0s    -> 302
+$ redis-cli TTL url:ArYvqWu   # capped at the link's remaining life, not the 1 h default
+2
+t=3s    -> 410