jobrun: error handling through notification channel

jobrun/jobrun.go

@@ -10,11 +10,13 @@ type Job struct {
 	Name      string
 	RunFunc   func() (err error)
 	LastStart time.Time
+	LastError error
 	Interval  time.Duration
 	Repeats   bool
 }
 
 type JobRunner struct {
+	notificationChan chan Job
 	newJobChan       chan Job
 	finishedJobChan  chan Job
 	scheduleTimer    <-chan time.Time
@@ -24,6 +26,7 @@ type JobRunner struct {
 
 func NewJobRunner() *JobRunner {
 	return &JobRunner{
+		notificationChan: make(chan Job),
 		newJobChan:       make(chan Job),
 		finishedJobChan:  make(chan Job),
 		pending:          make(map[string]Job),
@@ -39,6 +42,10 @@ func (r *JobRunner) AddJob(j Job) {
 	r.newJobChan <- j
 }
 
+func (r *JobRunner) NotificationChan() <-chan Job {
+	return r.notificationChan
+}
+
 func (r *JobRunner) Start() {
 
 loop:
@@ -104,7 +111,8 @@ loop:
 
 		go func(job Job) {
 			if err := job.RunFunc(); err != nil {
-				panic(fmt.Sprintf("%#v", err)) // TODO better policy, store in job + notification channel?
+				job.LastError = err
+				r.notificationChan <- job
 			}
 			r.finishedJobChan <- job
 		}(job)