refactor(CONFIG): Refactored CONFIG command code

Signed-off-by: Ankush Chavan <cankush625@gmail.com>

Author: cankush625

common/constants.go

@@ -12,7 +12,7 @@ const Set = "SET"
 const Expire = "EXPIRE"
 const Del = "DEL"
 const Keys = "KEYS"
-const ConfigCmd = "CONFIG"
+const Config = "CONFIG"
 
 // Command Args
 // Expiration Args

db/expiry.go

@@ -20,6 +20,9 @@ const (
 func StartActiveExpiry() {
 	go func() {
 		for {
+			// A fresh ticker is created on every iteration so that changes to hz
+			// via CONFIG SET take effect on the next cycle without a restart.
+			// Reusing a single ticker would lock in the interval set at startup.
 			interval := ServerConfig.CleanupInterval()
 			ticker := time.NewTicker(interval)
 			<-ticker.C

exc/command_executor.go

@@ -26,7 +26,7 @@ func ExecuteCommand(command common.Cmd) ([]byte, error) {
 		return cmd.Del(command)
 	case common.Keys:
 		return cmd.Keys(command)
-	case common.ConfigCmd:
+	case common.Config:
 		return cmd.ConfigCmd(command)
 	}
 	return []byte("-unsupported command\r\n"), UnsupportedCommand