load counter path from env

env

counter.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"log/slog"
 	"os"
 	"sync"
@@ -18,7 +19,13 @@ type RequestCounter struct {
 }
 
 // NewRequestCounter creates a new request counter with periodic snapshots
-func NewRequestCounter(snapshotPath string, snapshotInterval time.Duration) (*RequestCounter, error) {
+func NewRequestCounter(snapshotInterval time.Duration) (*RequestCounter, error) {
+	snapshotPath := os.Getenv("REQUEST_COUNTS_PATH")
+	if snapshotPath == "" {
+		err := errors.New("REQUEST_COUNTS_PATH environment variable must be set and non-empty")
+		slog.Error("failed to initialize request counter", "error", err)
+		os.Exit(1)
+	}
 	c := &RequestCounter{
 		counts:       make(map[string]int64),
 		snapshotPath: snapshotPath,