Worked on event system, needs a little more work

pkg/services/sqlstore/shared.go

@@ -0,0 +1,71 @@
+package sqlstore
+
+import (
+	"github.com/go-xorm/xorm"
+	"github.com/torkelo/grafana-pro/pkg/bus"
+	"github.com/torkelo/grafana-pro/pkg/log"
+)
+
+type dbTransactionFunc func(sess *xorm.Session) error
+type dbTransactionFunc2 func(sess *session) error
+
+type session struct {
+	*xorm.Session
+	events []interface{}
+}
+
+func (sess *session) publishAfterCommit(msg interface{}) {
+	sess.events = append(sess.events, msg)
+}
+
+func inTransaction(callback dbTransactionFunc) error {
+	var err error
+
+	sess := x.NewSession()
+	defer sess.Close()
+
+	if err = sess.Begin(); err != nil {
+		return err
+	}
+
+	err = callback(sess)
+
+	if err != nil {
+		sess.Rollback()
+		return err
+	} else if err = sess.Commit(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func inTransaction2(callback dbTransactionFunc2) error {
+	var err error
+
+	sess := session{Session: x.NewSession()}
+
+	defer sess.Close()
+	if err = sess.Begin(); err != nil {
+		return err
+	}
+
+	err = callback(&sess)
+
+	if err != nil {
+		sess.Rollback()
+		return err
+	} else if err = sess.Commit(); err != nil {
+		return err
+	}
+
+	if len(sess.events) > 0 {
+		for _, e := range sess.events {
+			if err = bus.Publish(e); err != nil {
+				log.Error(3, "Failed to publish event after commit", err)
+			}
+		}
+	}
+
+	return nil
+}