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txn nil guard when rolling back LatestEventsUpdater (#1524)

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* txn nil guard when rolling back LatestEventsUpdater

* Spell lint correctly
This commit is contained in:
Kegsay 2020-10-14 17:05:09 +01:00 committed by GitHub
parent 6f12b8f85c
commit e3c2b081c7
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 3 deletions
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13
roomserver/storage/shared/latest_events_updater.go
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@ -18,23 +18,30 @@ type LatestEventsUpdater struct {
currentStateSnapshotNID types.StateSnapshotNID currentStateSnapshotNID types.StateSnapshotNID
} }
func rollback(txn *sql.Tx) {
if txn == nil {
return
}
txn.Rollback() // nolint: errcheck
}
func NewLatestEventsUpdater(ctx context.Context, d *Database, txn *sql.Tx, roomInfo types.RoomInfo) (*LatestEventsUpdater, error) { func NewLatestEventsUpdater(ctx context.Context, d *Database, txn *sql.Tx, roomInfo types.RoomInfo) (*LatestEventsUpdater, error) {
eventNIDs, lastEventNIDSent, currentStateSnapshotNID, err := eventNIDs, lastEventNIDSent, currentStateSnapshotNID, err :=
d.RoomsTable.SelectLatestEventsNIDsForUpdate(ctx, txn, roomInfo.RoomNID) d.RoomsTable.SelectLatestEventsNIDsForUpdate(ctx, txn, roomInfo.RoomNID)
if err != nil { if err != nil {
txn.Rollback() // nolint: errcheck rollback(txn)
return nil, err return nil, err
} }
stateAndRefs, err := d.EventsTable.BulkSelectStateAtEventAndReference(ctx, txn, eventNIDs) stateAndRefs, err := d.EventsTable.BulkSelectStateAtEventAndReference(ctx, txn, eventNIDs)
if err != nil { if err != nil {
txn.Rollback() // nolint: errcheck rollback(txn)
return nil, err return nil, err
} }
var lastEventIDSent string var lastEventIDSent string
if lastEventNIDSent != 0 { if lastEventNIDSent != 0 {
lastEventIDSent, err = d.EventsTable.SelectEventID(ctx, txn, lastEventNIDSent) lastEventIDSent, err = d.EventsTable.SelectEventID(ctx, txn, lastEventNIDSent)
if err != nil { if err != nil {
txn.Rollback() // nolint: errcheck rollback(txn)
return nil, err return nil, err
} }
} }