added caching of signed in user DB calls

pkg/services/sqlstore/sqlstore.go

@@ -16,6 +16,7 @@ import (
 	m "github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/registry"
 	"github.com/grafana/grafana/pkg/services/annotations"
+	"github.com/grafana/grafana/pkg/services/cache"
 	"github.com/grafana/grafana/pkg/services/sqlstore/migrations"
 	"github.com/grafana/grafana/pkg/services/sqlstore/migrator"
 	"github.com/grafana/grafana/pkg/services/sqlstore/sqlutil"
@@ -47,8 +48,9 @@ func init() {
 }
 
 type SqlStore struct {
-	Cfg *setting.Cfg `inject:""`
-	Bus bus.Bus      `inject:""`
+	Cfg          *setting.Cfg        `inject:""`
+	Bus          bus.Bus             `inject:""`
+	CacheService *cache.CacheService `inject:""`
 
 	dbCfg           DatabaseConfig
 	engine          *xorm.Engine
@@ -148,9 +150,11 @@ func (ss *SqlStore) Init() error {
 
 	// Init repo instances
 	annotations.SetRepository(&SqlAnnotationRepo{})
-
 	ss.Bus.SetTransactionManager(ss)
 
+	// Register handlers
+	ss.addUserQueryAndCommandHandlers()
+
 	// ensure admin user
 	if ss.skipEnsureAdmin {
 		return nil

pkg/services/sqlstore/user.go

@@ -15,8 +15,9 @@ import (
 	"github.com/grafana/grafana/pkg/util"
 )
 
-func init() {
-	//bus.AddHandler("sql", CreateUser)
+func (ss *SqlStore) addUserQueryAndCommandHandlers() {
+	ss.Bus.AddHandler(ss.GetSignedInUser)
+
 	bus.AddHandler("sql", GetUserById)
 	bus.AddHandler("sql", UpdateUser)
 	bus.AddHandler("sql", ChangeUserPassword)
@@ -25,7 +26,6 @@ func init() {
 	bus.AddHandler("sql", SetUsingOrg)
 	bus.AddHandler("sql", UpdateUserLastSeenAt)
 	bus.AddHandler("sql", GetUserProfile)
-	bus.AddHandler("sql", GetSignedInUser)
 	bus.AddHandler("sql", SearchUsers)
 	bus.AddHandler("sql", GetUserOrgList)
 	bus.AddHandler("sql", DeleteUser)
@@ -345,12 +345,18 @@ func GetUserOrgList(query *m.GetUserOrgListQuery) error {
 	return err
 }
 
-func GetSignedInUser(query *m.GetSignedInUserQuery) error {
+func (ss *SqlStore) GetSignedInUser(query *m.GetSignedInUserQuery) error {
 	orgId := "u.org_id"
 	if query.OrgId > 0 {
 		orgId = strconv.FormatInt(query.OrgId, 10)
 	}
 
+	cacheKey := fmt.Sprintf("signed-in-user-%d-%s", query.UserId, query.OrgId)
+	if cached, found := ss.CacheService.Get(cacheKey); found {
+		query.Result = cached.(*m.SignedInUser)
+		return nil
+	}
+
 	var rawSql = `SELECT
 		u.id             as user_id,
 		u.is_admin       as is_grafana_admin,
@@ -401,6 +407,7 @@ func GetSignedInUser(query *m.GetSignedInUserQuery) error {
 	}
 
 	query.Result = &user
+	ss.CacheService.Set(cacheKey, &user, time.Second*5)
 	return err
 }