added batch limits

controller/config.go

@@ -68,12 +68,11 @@ type MaintenanceConfig struct {
 type RegistrationMaintenanceConfig struct {
 	ExpirationTimeout time.Duration
 	CheckFrequency    time.Duration
+	BatchLimit        int
 }
 
 func LoadConfig(path string) (*Config, error) {
-	cfg := &Config{
+	cfg := DefaultConfig()
-		Metrics: &MetricsConfig{ServiceName: "metrics"},
-	}
 	if err := cf.BindYaml(cfg, path, cf.DefaultOptions()); err != nil {
 		return nil, errors.Wrapf(err, "error loading controller config '%v'", path)
 	}
@@ -82,3 +81,16 @@ func LoadConfig(path string) (*Config, error) {
 	}
 	return cfg, nil
 }
+
+func DefaultConfig() *Config {
+	return &Config{
+		Metrics: &MetricsConfig{ServiceName: "metrics"},
+		Maintenance: &MaintenanceConfig{
+			Registration: &RegistrationMaintenanceConfig{
+				ExpirationTimeout: time.Hour * 24 * 30, //30 days
+				CheckFrequency:    time.Hour,
+				BatchLimit:        500,
+			},
+		},
+	}
+}

controller/controller.go

@@ -78,7 +78,7 @@ func Run(inCfg *Config) error {
 	}()
 
 	if cfg.Maintenance != nil && cfg.Maintenance.Registration != nil {
-		go newMaintenanceAgent(ctx, cfg.Maintenance.Registration.CheckFrequency, cfg.Maintenance.Registration.ExpirationTimeout).run()
+		go newMaintenanceAgent(ctx, cfg.Maintenance).run()
 	}
 
 	server := rest_server_zrok.NewServer(api)

controller/maintenance.go

@@ -11,21 +11,19 @@ import (
 )
 
 type maintenanceAgent struct {
+	*MaintenanceConfig
 	ctx context.Context
-	frequency  time.Duration
-	expiration time.Duration
 }
 
-func newMaintenanceAgent(ctx context.Context, frequency, expiration time.Duration) *maintenanceAgent {
+func newMaintenanceAgent(ctx context.Context, cfg *MaintenanceConfig) *maintenanceAgent {
 	return &maintenanceAgent{
+		MaintenanceConfig: cfg,
 		ctx:               ctx,
-		frequency:  frequency,
-		expiration: expiration,
 	}
 }
 
 func (ma *maintenanceAgent) run() {
-	ticker := time.NewTicker(ma.frequency)
+	ticker := time.NewTicker(ma.Registration.CheckFrequency)
 	for {
 		select {
 		case <-ma.ctx.Done():
@@ -51,8 +49,8 @@ func (ma *maintenanceAgent) deleteExpiredAccountRequests() error {
 	}
 	defer func() { _ = tx.Rollback() }()
 
-	expir := time.Now().UTC().Add(-ma.expiration)
+	expir := time.Now().UTC().Add(-ma.Registration.ExpirationTimeout)
-	accountRequests, err := str.FindExpiredAccountRequests(expir, tx)
+	accountRequests, err := str.FindExpiredAccountRequests(expir, ma.Registration.BatchLimit, tx)
 	if err != nil {
 		return errors.Wrapf(err, "error finding expire account requests before %v", expir)
 	}
@@ -68,11 +66,10 @@ func (ma *maintenanceAgent) deleteExpiredAccountRequests() error {
 		if err := str.DeleteMultipleAccountRequests(ids, tx); err != nil {
 			return errors.Wrapf(err, "error deleting expired account requests before %v", expir)
 		}
-	}
-
 		if err := tx.Commit(); err != nil {
 			return errors.Wrapf(err, "error committing expired acount requests deletion")
 		}
+	}
 
 	return nil
 }

controller/store/account_request.go

@@ -44,8 +44,8 @@ func (self *Store) FindAccountRequestWithToken(token string, tx *sqlx.Tx) (*Acco
 	return ar, nil
 }
 
-func (self *Store) FindExpiredAccountRequests(before time.Time, tx *sqlx.Tx) ([]*AccountRequest, error) {
+func (self *Store) FindExpiredAccountRequests(before time.Time, limit int, tx *sqlx.Tx) ([]*AccountRequest, error) {
-	rows, err := tx.Queryx("select * from account_requests where created_at < $1", before)
+	rows, err := tx.Queryx(fmt.Sprintf("select * from account_requests where created_at < $1 limit %d for update", limit), before)
 	if err != nil {
 		return nil, errors.Wrap(err, "error selecting expired account_requests")
 	}