hoernschen/dendrite
1
0
Fork 0
mirror of https://github.com/hoernschen/dendrite.git synced 2025-07-31 05:12:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Better mapping of stream positions to topological positions in /messages (#2263)

Browse source 
* Convert stream positions into topological positions for both `from` and `to` in `/messages`

* Hopefully it works now

* Remove unnecessary logging

* Return sane values if `StreamToTopologicalPosition` can't work out the right thing to do

* Revert logging change

* tweaks

* Fix `selectEventIDsInRangeASCSQL`

* Test `Getting messages going forward is limited for a departed room (SPEC-216)` was passing incorrectly so un-whitelist it
This commit is contained in:
Neil Alexander 2022-03-18 10:40:01 +00:00 • committed by GitHub
parent 191486438c
commit 475d3c1af9
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
7 changed files with 128 additions and 84 deletions
Download patch file Download diff file Expand all files Collapse all files

4
syncapi/storage/interface.go
View file

@ -103,8 +103,6 @@ type Database interface {
// DeletePeek deletes all peeks for a given room by a given user
// Returns an error if there was a problem communicating with the database.
DeletePeeks(ctx context.Context, RoomID, UserID string) (types.StreamPosition, error)
// GetEventsInStreamingRange retrieves all of the events on a given ordering using the given extremities and limit.
GetEventsInStreamingRange(ctx context.Context, from, to *types.StreamingToken, roomID string, eventFilter *gomatrixserverlib.RoomEventFilter, backwardOrdering bool) (events []types.StreamEvent, err error)
// GetEventsInTopologicalRange retrieves all of the events on a given ordering using the given extremities and limit.
GetEventsInTopologicalRange(ctx context.Context, from, to *types.TopologyToken, roomID string, limit int, backwardOrdering bool) (events []types.StreamEvent, err error)
// EventPositionInTopology returns the depth and stream position of the given event.
@ -149,4 +147,6 @@ type Database interface {
SelectContextEvent(ctx context.Context, roomID, eventID string) (int, gomatrixserverlib.HeaderedEvent, error)
SelectContextBeforeEvent(ctx context.Context, id int, roomID string, filter *gomatrixserverlib.RoomEventFilter) ([]*gomatrixserverlib.HeaderedEvent, error)
SelectContextAfterEvent(ctx context.Context, id int, roomID string, filter *gomatrixserverlib.RoomEventFilter) (int, []*gomatrixserverlib.HeaderedEvent, error)
StreamToTopologicalPosition(ctx context.Context, roomID string, streamPos types.StreamPosition, backwardOrdering bool) (types.TopologyToken, error)
}

41
syncapi/storage/postgres/output_room_events_topology_table.go
View file

@ -51,7 +51,7 @@ const selectEventIDsInRangeASCSQL = "" +
"SELECT event_id FROM syncapi_output_room_events_topology" +
" WHERE room_id = $1 AND (" +
"(topological_position > $2 AND topological_position < $3) OR" +
"(topological_position = $4 AND stream_position <= $5)" +
"(topological_position = $4 AND stream_position >= $5)" +
") ORDER BY topological_position ASC, stream_position ASC LIMIT $6"
const selectEventIDsInRangeDESCSQL = "" +
@ -76,13 +76,21 @@ const selectMaxPositionInTopologySQL = "" +
const deleteTopologyForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events_topology WHERE room_id = $1"
const selectStreamToTopologicalPositionAscSQL = "" +
"SELECT topological_position FROM syncapi_output_room_events_topology WHERE room_id = $1 AND stream_position >= $2 ORDER BY topological_position ASC LIMIT 1;"
const selectStreamToTopologicalPositionDescSQL = "" +
"SELECT topological_position FROM syncapi_output_room_events_topology WHERE room_id = $1 AND stream_position <= $2 ORDER BY topological_position DESC LIMIT 1;"
type outputRoomEventsTopologyStatements struct {
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
selectStreamToTopologicalPositionAscStmt *sql.Stmt
selectStreamToTopologicalPositionDescStmt *sql.Stmt
}
func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
@ -109,6 +117,12 @@ func NewPostgresTopologyTable(db *sql.DB) (tables.Topology, error) {
if s.deleteTopologyForRoomStmt, err = db.Prepare(deleteTopologyForRoomSQL); err != nil {
return nil, err
}
if s.selectStreamToTopologicalPositionAscStmt, err = db.Prepare(selectStreamToTopologicalPositionAscSQL); err != nil {
return nil, err
}
if s.selectStreamToTopologicalPositionDescStmt, err = db.Prepare(selectStreamToTopologicalPositionDescSQL); err != nil {
return nil, err
}
return s, nil
}
@ -170,6 +184,19 @@ func (s *outputRoomEventsTopologyStatements) SelectPositionInTopology(
return
}
// SelectStreamToTopologicalPosition returns the closest position of a given event
// in the topology of the room it belongs to from the given stream position.
func (s *outputRoomEventsTopologyStatements) SelectStreamToTopologicalPosition(
ctx context.Context, txn *sql.Tx, roomID string, streamPos types.StreamPosition, backwardOrdering bool,
) (topoPos types.StreamPosition, err error) {
if backwardOrdering {
err = s.selectStreamToTopologicalPositionDescStmt.QueryRowContext(ctx, roomID, streamPos).Scan(&topoPos)
} else {
err = s.selectStreamToTopologicalPositionAscStmt.QueryRowContext(ctx, roomID, streamPos).Scan(&topoPos)
}
return
}
func (s *outputRoomEventsTopologyStatements) SelectMaxPositionInTopology(
ctx context.Context, txn *sql.Tx, roomID string,
) (pos types.StreamPosition, spos types.StreamPosition, err error) {

51
syncapi/storage/shared/syncserver.go
View file

@ -155,37 +155,6 @@ func (d *Database) Events(ctx context.Context, eventIDs []string) ([]*gomatrixse
return d.StreamEventsToEvents(nil, streamEvents), nil
}
// GetEventsInStreamingRange retrieves all of the events on a given ordering using the
// given extremities and limit.
func (d *Database) GetEventsInStreamingRange(
ctx context.Context,
from, to *types.StreamingToken,
roomID string, eventFilter *gomatrixserverlib.RoomEventFilter,
backwardOrdering bool,
) (events []types.StreamEvent, err error) {
r := types.Range{
From: from.PDUPosition,
To: to.PDUPosition,
Backwards: backwardOrdering,
}
if backwardOrdering {
// When using backward ordering, we want the most recent events first.
if events, _, err = d.OutputEvents.SelectRecentEvents(
ctx, nil, roomID, r, eventFilter, false, false,
); err != nil {
return
}
} else {
// When using forward ordering, we want the least recent events first.
if events, err = d.OutputEvents.SelectEarlyEvents(
ctx, nil, roomID, r, eventFilter,
); err != nil {
return
}
}
return events, err
}
func (d *Database) AllJoinedUsersInRooms(ctx context.Context) (map[string][]string, error) {
return d.CurrentRoomState.SelectJoinedUsers(ctx)
}
@ -513,6 +482,26 @@ func (d *Database) EventPositionInTopology(
return types.TopologyToken{Depth: depth, PDUPosition: stream}, nil
}
func (d *Database) StreamToTopologicalPosition(
ctx context.Context, roomID string, streamPos types.StreamPosition, backwardOrdering bool,
) (types.TopologyToken, error) {
topoPos, err := d.Topology.SelectStreamToTopologicalPosition(ctx, nil, roomID, streamPos, backwardOrdering)
switch {
case err == sql.ErrNoRows && backwardOrdering: // no events in range, going backward
return types.TopologyToken{PDUPosition: streamPos}, nil
case err == sql.ErrNoRows && !backwardOrdering: // no events in range, going forward
topoPos, streamPos, err = d.Topology.SelectMaxPositionInTopology(ctx, nil, roomID)
if err != nil {
return types.TopologyToken{}, fmt.Errorf("d.Topology.SelectMaxPositionInTopology: %w", err)
}
return types.TopologyToken{Depth: topoPos, PDUPosition: streamPos}, nil
case err != nil: // some other error happened
return types.TopologyToken{}, fmt.Errorf("d.Topology.SelectStreamToTopologicalPosition: %w", err)
default:
return types.TopologyToken{Depth: topoPos, PDUPosition: streamPos}, nil
}
}
func (d *Database) GetFilter(
ctx context.Context, localpart string, filterID string,
) (*gomatrixserverlib.Filter, error) {

43
syncapi/storage/sqlite3/output_room_events_topology_table.go
View file

@ -47,7 +47,7 @@ const selectEventIDsInRangeASCSQL = "" +
"SELECT event_id FROM syncapi_output_room_events_topology" +
" WHERE room_id = $1 AND (" +
"(topological_position > $2 AND topological_position < $3) OR" +
"(topological_position = $4 AND stream_position <= $5)" +
"(topological_position = $4 AND stream_position >= $5)" +
") ORDER BY topological_position ASC, stream_position ASC LIMIT $6"
const selectEventIDsInRangeDESCSQL = "" +
@ -65,17 +65,22 @@ const selectMaxPositionInTopologySQL = "" +
"SELECT MAX(topological_position), stream_position FROM syncapi_output_room_events_topology" +
" WHERE room_id = $1 ORDER BY stream_position DESC"
const deleteTopologyForRoomSQL = "" +
"DELETE FROM syncapi_output_room_events_topology WHERE room_id = $1"
const selectStreamToTopologicalPositionAscSQL = "" +
"SELECT topological_position FROM syncapi_output_room_events_topology WHERE room_id = $1 AND stream_position >= $2 ORDER BY topological_position ASC LIMIT 1;"
const selectStreamToTopologicalPositionDescSQL = "" +
"SELECT topological_position FROM syncapi_output_room_events_topology WHERE room_id = $1 AND stream_position <= $2 ORDER BY topological_position DESC LIMIT 1;"
type outputRoomEventsTopologyStatements struct {
db *sql.DB
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
db *sql.DB
insertEventInTopologyStmt *sql.Stmt
selectEventIDsInRangeASCStmt *sql.Stmt
selectEventIDsInRangeDESCStmt *sql.Stmt
selectPositionInTopologyStmt *sql.Stmt
selectMaxPositionInTopologyStmt *sql.Stmt
deleteTopologyForRoomStmt *sql.Stmt
selectStreamToTopologicalPositionAscStmt *sql.Stmt
selectStreamToTopologicalPositionDescStmt *sql.Stmt
}
func NewSqliteTopologyTable(db *sql.DB) (tables.Topology, error) {
@ -101,7 +106,10 @@ func NewSqliteTopologyTable(db *sql.DB) (tables.Topology, error) {
if s.selectMaxPositionInTopologyStmt, err = db.Prepare(selectMaxPositionInTopologySQL); err != nil {
return nil, err
}
if s.deleteTopologyForRoomStmt, err = db.Prepare(deleteTopologyForRoomSQL); err != nil {
if s.selectStreamToTopologicalPositionAscStmt, err = db.Prepare(selectStreamToTopologicalPositionAscSQL); err != nil {
return nil, err
}
if s.selectStreamToTopologicalPositionDescStmt, err = db.Prepare(selectStreamToTopologicalPositionDescSQL); err != nil {
return nil, err
}
return s, nil
@ -163,6 +171,19 @@ func (s *outputRoomEventsTopologyStatements) SelectPositionInTopology(
return
}
// SelectStreamToTopologicalPosition returns the closest position of a given event
// in the topology of the room it belongs to from the given stream position.
func (s *outputRoomEventsTopologyStatements) SelectStreamToTopologicalPosition(
ctx context.Context, txn *sql.Tx, roomID string, streamPos types.StreamPosition, backwardOrdering bool,
) (topoPos types.StreamPosition, err error) {
if backwardOrdering {
err = s.selectStreamToTopologicalPositionDescStmt.QueryRowContext(ctx, roomID, streamPos).Scan(&topoPos)
} else {
err = s.selectStreamToTopologicalPositionAscStmt.QueryRowContext(ctx, roomID, streamPos).Scan(&topoPos)
}
return
}
func (s *outputRoomEventsTopologyStatements) SelectMaxPositionInTopology(
ctx context.Context, txn *sql.Tx, roomID string,
) (pos types.StreamPosition, spos types.StreamPosition, err error) {

2
syncapi/storage/tables/interface.go
View file

@ -87,6 +87,8 @@ type Topology interface {
SelectMaxPositionInTopology(ctx context.Context, txn *sql.Tx, roomID string) (depth types.StreamPosition, spos types.StreamPosition, err error)
// DeleteTopologyForRoom removes all topological information for a room. This should only be done when removing the room entirely.
DeleteTopologyForRoom(ctx context.Context, txn *sql.Tx, roomID string) (err error)
// SelectStreamToTopologicalPosition converts a stream position to a topological position by finding the nearest topological position in the room.
SelectStreamToTopologicalPosition(ctx context.Context, txn *sql.Tx, roomID string, streamPos types.StreamPosition, forward bool) (topoPos types.StreamPosition, err error)
}
type CurrentRoomState interface {