Use two separate inputs for metric router to simplify management. Activate --logfile option and close MultiChanTicker explicitly

internal/multiChanTicker/multiChanTicker.go

@@ -1,27 +1,43 @@
 package multiChanTicker
 
 import (
+	cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
 	"time"
 )
 
 type multiChanTicker struct {
 	ticker   *time.Ticker
 	channels []chan time.Time
+	done     chan bool
 }
 
 type MultiChanTicker interface {
 	Init(duration time.Duration)
 	AddChannel(chan time.Time)
+	Close()
 }
 
 func (t *multiChanTicker) Init(duration time.Duration) {
 	t.ticker = time.NewTicker(duration)
+	t.done = make(chan bool)
 	go func() {
+		done := func() {
+			cclog.ComponentDebug("MultiChanTicker", "DONE")
+		}
 		for {
 			select {
+			case <-t.done:
+				done()
+				return
 			case ts := <-t.ticker.C:
+				cclog.ComponentDebug("MultiChanTicker", "Tick", ts)
 				for _, c := range t.channels {
-					c <- ts
+					select {
+					case <-t.done:
+						done()
+						return
+					case c <- ts:
+					}
 				}
 			}
 		}
@@ -32,6 +48,11 @@ func (t *multiChanTicker) AddChannel(channel chan time.Time) {
 	t.channels = append(t.channels, channel)
 }
 
+func (t *multiChanTicker) Close() {
+	t.done <- true
+	cclog.ComponentDebug("MultiChanTicker", "CLOSE")
+}
+
 func NewTicker(duration time.Duration) MultiChanTicker {
 	t := &multiChanTicker{}
 	t.Init(duration)