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Cleanup syncapi topology logic (#1035)

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* Cleanup syncapi topology logic

* Variable renaming

* comments
This commit is contained in:
Kegsay 2020-05-14 17:30:16 +01:00 • committed by GitHub
parent 3cb04e8004
commit 7ca230e931
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9 changed files with 67 additions and 154 deletions
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37
syncapi/storage/postgres/output_room_events_topology_table.go
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@ -72,17 +72,12 @@ const selectMaxPositionInTopologySQL = "" +
"SELECT MAX(topological_position) FROM syncapi_output_room_events_topology WHERE room_id=$1" +
") ORDER BY stream_position DESC LIMIT 1"
const selectEventIDsFromPositionSQL = "" +
"SELECT event_id FROM syncapi_output_room_events_topology" +
" WHERE room_id = $1 AND topological_position = $2"
type outputRoomEventsTopologyStatements struct {
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
selectEventIDsFromPositionStmt *sql.Stmt
}
func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
@ -106,9 +101,6 @@ func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
if s.selectMaxPositionInTopologyStmt, err = db.Prepare(selectMaxPositionInTopologySQL); err != nil {
return nil, err
}
if s.selectEventIDsFromPositionStmt, err = db.Prepare(selectEventIDsFromPositionSQL); err != nil {
return nil, err
}
return s, nil
}
@ -127,7 +119,7 @@ func (s *outputRoomEventsTopologyStatements) InsertEventInTopology(
// given range in a given room's topological order.
// Returns an empty slice if no events match the given range.
func (s *outputRoomEventsTopologyStatements) SelectEventIDsInRange(
ctx context.Context, txn *sql.Tx, roomID string, fromPos, toPos, toMicroPos types.StreamPosition,
ctx context.Context, txn *sql.Tx, roomID string, minDepth, maxDepth, maxStreamPos types.StreamPosition,
limit int, chronologicalOrder bool,
) (eventIDs []string, err error) {
// Decide on the selection's order according to whether chronological order
@ -140,7 +132,7 @@ func (s *outputRoomEventsTopologyStatements) SelectEventIDsInRange(
}
// Query the event IDs.
rows, err := stmt.QueryContext(ctx, roomID, fromPos, toPos, toPos, toMicroPos, limit)
rows, err := stmt.QueryContext(ctx, roomID, minDepth, maxDepth, maxDepth, maxStreamPos, limit)
if err == sql.ErrNoRows {
// If no event matched the request, return an empty slice.
return []string{}, nil
@ -176,28 +168,3 @@ func (s *outputRoomEventsTopologyStatements) SelectMaxPositionInTopology(
err = s.selectMaxPositionInTopologyStmt.QueryRowContext(ctx, roomID).Scan(&pos, &spos)
return
}
// SelectEventIDsFromPosition returns the IDs of all events that have a given
// position in the topology of a given room.
func (s *outputRoomEventsTopologyStatements) SelectEventIDsFromPosition(
ctx context.Context, txn *sql.Tx, roomID string, pos types.StreamPosition,
) (eventIDs []string, err error) {
// Query the event IDs.
rows, err := s.selectEventIDsFromPositionStmt.QueryContext(ctx, roomID, pos)
if err == sql.ErrNoRows {
// If no event matched the request, return an empty slice.
return []string{}, nil
} else if err != nil {
return
}
defer common.CloseAndLogIfError(ctx, rows, "selectEventIDsFromPosition: rows.close() failed")
// Return the IDs.
var eventID string
for rows.Next() {
if err = rows.Scan(&eventID); err != nil {
return
}
eventIDs = append(eventIDs, eventID)
}
return eventIDs, rows.Err()
}