From edf845225ad135236b5945939f34df2e799242ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Duffeck?= <andre.duffeck@firondu.de>
Date: Tue, 8 Mar 2022 15:01:01 +0100
Subject: [PATCH] Only add the service user to the index once (lazily)

Adding and removing it again with each ListAccounts() call was a huge
overhead. This is a temporary workaround, the whole service is gonna be
replaced by the idm service soon anyway.
---
 accounts/pkg/service/v0/accounts.go | 29 -----------------------------
 accounts/pkg/service/v0/service.go  | 24 ++++++++++++++++++++++++
 2 files changed, 24 insertions(+), 29 deletions(-)

diff --git a/accounts/pkg/service/v0/accounts.go b/accounts/pkg/service/v0/accounts.go
index bd28223106e..7fab6a7d187 100644
--- a/accounts/pkg/service/v0/accounts.go
+++ b/accounts/pkg/service/v0/accounts.go
@@ -99,33 +99,6 @@ func (s Service) hasSelfManagementPermissions(ctx context.Context) bool {
 	return s.RoleManager.FindPermissionByID(ctx, roleIDs, SelfManagementPermissionID) != nil
 }
 
-// serviceUserToIndex temporarily adds a service user to the index, which is supposed to be removed before the lock on the handler function is released
-func (s Service) serviceUserToIndex() (teardownServiceUser func()) {
-	if s.Config.ServiceUser.Username != "" && s.Config.ServiceUser.UUID != "" {
-		_, err := s.index.Add(s.getInMemoryServiceUser())
-		if err != nil {
-			s.log.Logger.Err(err).Msg("service user was configured but failed to be added to the index")
-		} else {
-			return func() {
-				_ = s.index.Delete(s.getInMemoryServiceUser())
-			}
-		}
-	}
-	return func() {}
-}
-
-func (s Service) getInMemoryServiceUser() accountsmsg.Account {
-	return accountsmsg.Account{
-		AccountEnabled:           true,
-		Id:                       s.Config.ServiceUser.UUID,
-		PreferredName:            s.Config.ServiceUser.Username,
-		OnPremisesSamAccountName: s.Config.ServiceUser.Username,
-		DisplayName:              s.Config.ServiceUser.Username,
-		UidNumber:                s.Config.ServiceUser.UID,
-		GidNumber:                s.Config.ServiceUser.GID,
-	}
-}
-
 // ListAccounts implements the AccountsServiceHandler interface
 // the query contains account properties
 func (s Service) ListAccounts(ctx context.Context, in *accountssvc.ListAccountsRequest, out *accountssvc.ListAccountsResponse) (err error) {
@@ -145,8 +118,6 @@ func (s Service) ListAccounts(ctx context.Context, in *accountssvc.ListAccountsR
 	}
 	onlySelf := hasSelf && !hasManagement
 
-	teardownServiceUser := s.serviceUserToIndex()
-	defer teardownServiceUser()
 	match, authRequest := getAuthQueryMatch(in.Query)
 	if authRequest {
 		password := match[2]
diff --git a/accounts/pkg/service/v0/service.go b/accounts/pkg/service/v0/service.go
index f709b70f20b..7c19e26618e 100644
--- a/accounts/pkg/service/v0/service.go
+++ b/accounts/pkg/service/v0/service.go
@@ -86,9 +86,33 @@ func New(opts ...Option) (s *Service, err error) {
 	if err = s.createDefaultGroups(cfg.DemoUsersAndGroups); err != nil {
 		return nil, err
 	}
+
+	s.serviceUserToIndex()
 	return
 }
 
+// serviceUserToIndex temporarily adds a service user to the index, which is supposed to be removed before the lock on the handler function is released
+func (s Service) serviceUserToIndex() {
+	if s.Config.ServiceUser.Username != "" && s.Config.ServiceUser.UUID != "" {
+		_, err := s.index.Add(s.getInMemoryServiceUser())
+		if err != nil {
+			s.log.Logger.Err(err).Msg("service user was configured but failed to be added to the index")
+		}
+	}
+}
+
+func (s Service) getInMemoryServiceUser() accountsmsg.Account {
+	return accountsmsg.Account{
+		AccountEnabled:           true,
+		Id:                       s.Config.ServiceUser.UUID,
+		PreferredName:            s.Config.ServiceUser.Username,
+		OnPremisesSamAccountName: s.Config.ServiceUser.Username,
+		DisplayName:              s.Config.ServiceUser.Username,
+		UidNumber:                s.Config.ServiceUser.UID,
+		GidNumber:                s.Config.ServiceUser.GID,
+	}
+}
+
 func (s Service) buildIndex() (*indexer.Indexer, error) {
 	var indexcfg *idxcfg.Config