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 +1,13 @@
+$ curl -si -X GET /Zq9Zq9
+HTTP/1.1 404 
+{"detail":"no such code: Zq9Zq9","instance":"/Zq9Zq9","status":404,"title":"Not Found"}
+
+$ curl -si -X GET /Zq9Zq9
+HTTP/1.1 404 
+{"detail":"no such code: Zq9Zq9","instance":"/Zq9Zq9","status":404,"title":"Not Found"}
+
+cache misses: before=2 after-first-404=3 after-second-404=3
+$ redis-cli GET url:Zq9Zq9   # the negative-cache marker
+-
+$ redis-cli TTL url:Zq9Zq9
+60