백업 테이블 운영

cmd/server/main.go

@@ -1,19 +1,24 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"log"
 	"net/url"
 	"os"
+	"time"
 
 	"github.com/gofiber/fiber/v2"
 
 	"geoip-rest/internal/geo"
+	"geoip-rest/internal/schedule"
 )
 
 const (
 	defaultPort   = "8080"
-	defaultDBPath = "/data/GeoLite2-City.mmdb"
+	defaultDBPath = "/initial_data/GeoLite2-City.mmdb"
+	defaultCron   = ""
+	defaultScript = "./scripts/dump_and_import.sh"
 )
 
 func main() {
@@ -87,6 +92,14 @@ func main() {
 		log.Printf("using mmdb path %s", dbPath)
 	}
 
+	stopScheduler := maybeStartScheduler()
+	defer func() {
+		if stopScheduler != nil {
+			ctx := stopScheduler()
+			<-ctx.Done()
+		}
+	}()
+
 	if err := app.Listen(":" + port); err != nil {
 		log.Fatalf("server stopped: %v", err)
 	}
@@ -106,3 +119,33 @@ func sanitizeDBURL(raw string) string {
 	}
 	return u.Redacted()
 }
+
+func maybeStartScheduler() func() context.Context {
+	cronExpr := env("USER_PROGRAM_CRON", defaultCron)
+	if cronExpr == "" {
+		return nil
+	}
+	script := env("USER_PROGRAM_SCRIPT", defaultScript)
+
+	sched, err := schedule.Start(schedule.Config{
+		CronExpr:   cronExpr,
+		ScriptPath: script,
+		Logger:     log.Default(),
+	})
+	if err != nil {
+		log.Printf("scheduler not started (error=%v)", err)
+		return nil
+	}
+
+	return func() context.Context {
+		ctx := sched.Stop()
+		timer := time.NewTimer(2 * time.Second)
+		select {
+		case <-ctx.Done():
+			timer.Stop()
+			return ctx
+		case <-timer.C:
+			return ctx
+		}
+	}
+}