Introduce job duration update task

internal/repository/job.go

@@ -205,7 +205,10 @@ func (r *JobRepository) UpdateMetadata(job *schema.Job, key, val string) (err er
 		return err
 	}
 
-	if _, err = sq.Update("job").Set("meta_data", job.RawMetaData).Where("job.id = ?", job.ID).RunWith(r.stmtCache).Exec(); err != nil {
+	if _, err = sq.Update("job").
+		Set("meta_data", job.RawMetaData).
+		Where("job.id = ?", job.ID).
+		RunWith(r.stmtCache).Exec(); err != nil {
 		log.Warnf("Error while updating metadata for job, DB ID '%v'", job.ID)
 		return err
 	}
@@ -480,6 +483,18 @@ func (r *JobRepository) FindRunningJobs(cluster string) ([]*schema.Job, error) {
 	return jobs, nil
 }
 
+func (r *JobRepository) UpdateDuration() error {
+	if _, err := sq.Update("job").
+		Set("duration", sq.Expr("? - job.start_time", time.Now().Unix())).
+		Where("job_state = running").
+		RunWith(r.stmtCache).Exec(); err != nil {
+		log.Warnf("Error while updating metadata for job, DB ID '%v'", job.ID)
+		return err
+	}
+
+	return nil
+}
+
 func (r *JobRepository) FindJobsBetween(startTimeBegin int64, startTimeEnd int64) ([]*schema.Job, error) {
 	var query sq.SelectBuilder
 

internal/taskManager/taskManager.go

@@ -80,6 +80,7 @@ func Start() {
 	}
 
 	RegisterFootprintWorker()
+	RegisterUpdateDurationWorker()
 
 	s.Start()
 }

internal/taskManager/updateDurationService.go

@@ -0,0 +1,26 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package taskManager
+
+import (
+	"time"
+
+	"github.com/ClusterCockpit/cc-backend/pkg/log"
+	"github.com/go-co-op/gocron/v2"
+)
+
+func RegisterUpdateDurationWorker() {
+	log.Info("Register duration update service")
+
+	d, _ := time.ParseDuration("5m")
+	s.NewJob(gocron.DurationJob(d),
+		gocron.NewTask(
+			func() {
+				start := time.Now()
+				log.Printf("Update duration started at %s", start.Format(time.RFC3339))
+				jobRepo.UpdateDuration()
+				log.Print("Update duration is done and took %s", time.Since(start))
+			}))
+}