adds tests for journaling sql operations

pkg/models/alert_notifications.go

@@ -9,6 +9,7 @@ import (
 
 var (
 	ErrNotificationFrequencyNotFound = errors.New("Notification frequency not specified")
+	ErrJournalingNotFound            = errors.New("alert notification journaling not found")
 )
 
 type AlertNotification struct {

pkg/services/alerting/notifiers/base.go

@@ -73,15 +73,16 @@ func (n *NotifierBase) ShouldNotify(c *alerting.EvalContext) bool {
 		NotifierId: n.Id,
 	}
 
-	if err := bus.DispatchCtx(c.Ctx, cmd); err != nil {
+	err := bus.DispatchCtx(c.Ctx, cmd)
+	if err != nil {
 		n.log.Error("Could not determine last time alert notifier fired", "Alert name", c.Rule.Name, "Error", err)
 		return false
 	}
 
-	// this currently serves two purposes.
-	// 1. make sure failed notifications try again
-	// 2. make sure we send notifications if no previous exist
-	// this should be refactored //Carl Bergquist
+	if err == models.ErrJournalingNotFound {
+		return true
+	}
+
 	if !cmd.Result.Success {
 		return true
 	}

pkg/services/sqlstore/alert_notification.go

@@ -249,13 +249,20 @@ func RecordNotificationJournal(ctx context.Context, cmd *m.RecordNotificationJou
 
 func GetLatestNotification(ctx context.Context, cmd *m.GetLatestNotificationQuery) error {
 	return inTransactionCtx(ctx, func(sess *DBSession) error {
-		notificationJournal := &m.AlertNotificationJournal{}
-		_, err := sess.Desc("alert_notification_journal.sent_at").Limit(1).Where("alert_notification_journal.org_id = ? AND alert_notification_journal.alert_id = ? AND alert_notification_journal.notifier_id = ?", cmd.OrgId, cmd.AlertId, cmd.NotifierId).Get(notificationJournal)
+		nj := &m.AlertNotificationJournal{}
+		_, err := sess.Desc("alert_notification_journal.sent_at").
+			Limit(1).
+			Where("alert_notification_journal.org_id = ? AND alert_notification_journal.alert_id = ? AND alert_notification_journal.notifier_id = ?", cmd.OrgId, cmd.AlertId, cmd.NotifierId).Get(nj)
+
 		if err != nil {
 			return err
 		}
 
-		cmd.Result = notificationJournal
+		if nj.AlertId == 0 && nj.Id == 0 && nj.NotifierId == 0 && nj.OrgId == 0 {
+			return m.ErrJournalingNotFound
+		}
+
+		cmd.Result = nj
 		return nil
 	})
 }

pkg/services/sqlstore/alert_notification_test.go

 package sqlstore
 
 import (
+	"context"
 	"testing"
 
 	"github.com/grafana/grafana/pkg/components/simplejson"
@@ -12,6 +13,48 @@ func TestAlertNotificationSQLAccess(t *testing.T) {
 	Convey("Testing Alert notification sql access", t, func() {
 		InitTestDB(t)
 
+		Convey("Alert notification journal", func() {
+			var alertId int64 = 5
+			var orgId int64 = 5
+			var notifierId int64 = 5
+
+			Convey("Getting last journal should raise error if no one exists", func() {
+				query := &m.GetLatestNotificationQuery{AlertId: alertId, OrgId: orgId, NotifierId: notifierId}
+				err := GetLatestNotification(context.Background(), query)
+				So(err, ShouldEqual, m.ErrJournalingNotFound)
+
+				Convey("shoulbe be able to record two journaling events", func() {
+					createCmd := &m.RecordNotificationJournalCommand{AlertId: alertId, NotifierId: notifierId, OrgId: orgId, Success: true, SentAt: 1}
+
+					err := RecordNotificationJournal(context.Background(), createCmd)
+					So(err, ShouldBeNil)
+
+					createCmd.SentAt += 1000 //increase epoch
+
+					err = RecordNotificationJournal(context.Background(), createCmd)
+					So(err, ShouldBeNil)
+
+					Convey("get last journaling event", func() {
+						err := GetLatestNotification(context.Background(), query)
+						So(err, ShouldBeNil)
+						So(query.Result.SentAt, ShouldEqual, 1001)
+
+						Convey("be able to clear all journaling for an notifier", func() {
+							cmd := &m.CleanNotificationJournalCommand{AlertId: alertId, NotifierId: notifierId, OrgId: orgId}
+							err := CleanNotificationJournal(context.Background(), cmd)
+							So(err, ShouldBeNil)
+
+							Convey("querying for last junaling should raise error", func() {
+								query := &m.GetLatestNotificationQuery{AlertId: alertId, OrgId: orgId, NotifierId: notifierId}
+								err := GetLatestNotification(context.Background(), query)
+								So(err, ShouldEqual, m.ErrJournalingNotFound)
+							})
+						})
+					})
+				})
+			})
+		})
+
 		Convey("Alert notifications should be empty", func() {
 			cmd := &m.GetAlertNotificationsQuery{
 				OrgId: 2,