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Clean up syncapi storage to match the coding style set by roomserver storage (#131)

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This commit is contained in:
Mark Haines 2017-06-05 10:37:04 +01:00 committed by GitHub
parent ef7b934d51
commit 721c2df484
3 changed files with 122 additions and 107 deletions
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49
src/github.com/matrix-org/dendrite/syncapi/storage/current_room_state_table.go
View file

@ -16,9 +16,6 @@ package storage
import (
"database/sql"
"encoding/json"
"github.com/matrix-org/dendrite/clientapi/events"
"github.com/matrix-org/gomatrixserverlib"
)
@ -96,7 +93,7 @@ func (s *currentRoomStateStatements) prepare(db *sql.DB) (err error) {
}
// JoinedMemberLists returns a map of room ID to a list of joined user IDs.
func (s *currentRoomStateStatements) JoinedMemberLists() (map[string][]string, error) {
func (s *currentRoomStateStatements) selectJoinedUsers() (map[string][]string, error) {
rows, err := s.selectJoinedUsersStmt.Query()
if err != nil {
return nil, err
@ -118,7 +115,7 @@ func (s *currentRoomStateStatements) JoinedMemberLists() (map[string][]string, e
}
// SelectRoomIDsWithMembership returns the list of room IDs which have the given user in the given membership state.
func (s *currentRoomStateStatements) SelectRoomIDsWithMembership(txn *sql.Tx, userID, membership string) ([]string, error) {
func (s *currentRoomStateStatements) selectRoomIDsWithMembership(txn *sql.Tx, userID, membership string) ([]string, error) {
rows, err := txn.Stmt(s.selectRoomIDsWithMembershipStmt).Query(userID, membership)
if err != nil {
return nil, err
@ -137,7 +134,7 @@ func (s *currentRoomStateStatements) SelectRoomIDsWithMembership(txn *sql.Tx, us
}
// CurrentState returns all the current state events for the given room.
func (s *currentRoomStateStatements) CurrentState(txn *sql.Tx, roomID string) ([]gomatrixserverlib.Event, error) {
func (s *currentRoomStateStatements) selectCurrentState(txn *sql.Tx, roomID string) ([]gomatrixserverlib.Event, error) {
rows, err := txn.Stmt(s.selectCurrentStateStmt).Query(roomID)
if err != nil {
return nil, err
@ -160,34 +157,14 @@ func (s *currentRoomStateStatements) CurrentState(txn *sql.Tx, roomID string) ([
return result, nil
}
func (s *currentRoomStateStatements) UpdateRoomState(txn *sql.Tx, added []gomatrixserverlib.Event, removedEventIDs []string) error {
// remove first, then add, as we do not ever delete state, but do replace state which is a remove followed by an add.
for _, eventID := range removedEventIDs {
_, err := txn.Stmt(s.deleteRoomStateByEventIDStmt).Exec(eventID)
if err != nil {
return err
}
}
for _, event := range added {
if event.StateKey() == nil {
// ignore non state events
continue
}
var membership *string
if event.Type() == "m.room.member" {
var memberContent events.MemberContent
if err := json.Unmarshal(event.Content(), &memberContent); err != nil {
return err
}
membership = &memberContent.Membership
}
_, err := txn.Stmt(s.upsertRoomStateStmt).Exec(
event.RoomID(), event.EventID(), event.Type(), *event.StateKey(), event.JSON(), membership,
)
if err != nil {
return err
}
}
return nil
func (s *currentRoomStateStatements) deleteRoomStateByEventID(txn *sql.Tx, eventID string) error {
_, err := txn.Stmt(s.deleteRoomStateByEventIDStmt).Exec(eventID)
return err
}
func (s *currentRoomStateStatements) upsertRoomState(txn *sql.Tx, event gomatrixserverlib.Event, membership *string) error {
_, err := txn.Stmt(s.upsertRoomStateStmt).Exec(
event.RoomID(), event.EventID(), event.Type(), *event.StateKey(), event.JSON(), membership,
)
return err
}

67
src/github.com/matrix-org/dendrite/syncapi/storage/output_room_events_table.go
View file

@ -95,13 +95,15 @@ func (s *outputRoomEventsStatements) prepare(db *sql.DB) (err error) {
return
}
// StateBetween returns the state events between the two given stream positions, exclusive of oldPos, inclusive of newPos.
// selectStateInRange returns the state events between the two given stream positions, exclusive of oldPos, inclusive of newPos.
// Results are bucketed based on the room ID. If the same state is overwritten multiple times between the
// two positions, only the most recent state is returned.
func (s *outputRoomEventsStatements) StateBetween(txn *sql.Tx, oldPos, newPos types.StreamPosition) (map[string][]streamEvent, error) {
func (s *outputRoomEventsStatements) selectStateInRange(
txn *sql.Tx, oldPos, newPos types.StreamPosition,
) (map[string]map[string]bool, map[string]streamEvent, error) {
rows, err := txn.Stmt(s.selectStateInRangeStmt).Query(oldPos, newPos)
if err != nil {
return nil, err
return nil, nil, err
}
// Fetch all the state change events for all rooms between the two positions then loop each event and:
// - Keep a cache of the event by ID (99% of state change events are for the event itself)
@ -121,7 +123,7 @@ func (s *outputRoomEventsStatements) StateBetween(txn *sql.Tx, oldPos, newPos ty
delIDs pq.StringArray
)
if err := rows.Scan(&streamPos, &eventBytes, &addIDs, &delIDs); err != nil {
return nil, err
return nil, nil, err
}
// Sanity check for deleted state and whine if we see it. We don't need to do anything
// since it'll just mark the event as not being needed.
@ -137,7 +139,7 @@ func (s *outputRoomEventsStatements) StateBetween(txn *sql.Tx, oldPos, newPos ty
// TODO: Handle redacted events
ev, err := gomatrixserverlib.NewEventFromTrustedJSON(eventBytes, false)
if err != nil {
return nil, err
return nil, nil, err
}
needSet := stateNeeded[ev.RoomID()]
if needSet == nil { // make set if required
@ -154,56 +156,13 @@ func (s *outputRoomEventsStatements) StateBetween(txn *sql.Tx, oldPos, newPos ty
eventIDToEvent[ev.EventID()] = streamEvent{ev, types.StreamPosition(streamPos)}
}
return s.fetchStateEvents(txn, stateNeeded, eventIDToEvent)
}
// fetchStateEvents converts the set of event IDs into a set of events. It will fetch any which are missing from the database.
// Returns a map of room ID to list of events.
func (s *outputRoomEventsStatements) fetchStateEvents(txn *sql.Tx, roomIDToEventIDSet map[string]map[string]bool, eventIDToEvent map[string]streamEvent) (map[string][]streamEvent, error) {
stateBetween := make(map[string][]streamEvent)
missingEvents := make(map[string][]string)
for roomID, ids := range roomIDToEventIDSet {
events := stateBetween[roomID]
for id, need := range ids {
if !need {
continue // deleted state
}
e, ok := eventIDToEvent[id]
if ok {
events = append(events, e)
} else {
m := missingEvents[roomID]
m = append(m, id)
missingEvents[roomID] = m
}
}
stateBetween[roomID] = events
}
if len(missingEvents) > 0 {
// This happens when add_state_ids has an event ID which is not in the provided range.
// We need to explicitly fetch them.
allMissingEventIDs := []string{}
for _, missingEvIDs := range missingEvents {
allMissingEventIDs = append(allMissingEventIDs, missingEvIDs...)
}
evs, err := s.Events(txn, allMissingEventIDs)
if err != nil {
return nil, err
}
// we know we got them all otherwise an error would've been returned, so just loop the events
for _, ev := range evs {
roomID := ev.RoomID()
stateBetween[roomID] = append(stateBetween[roomID], ev)
}
}
return stateBetween, nil
return stateNeeded, eventIDToEvent, nil
}
// MaxID returns the ID of the last inserted event in this table. 'txn' is optional. If it is not supplied,
// then this function should only ever be used at startup, as it will race with inserting events if it is
// done afterwards. If there are no inserted events, 0 is returned.
func (s *outputRoomEventsStatements) MaxID(txn *sql.Tx) (id int64, err error) {
func (s *outputRoomEventsStatements) selectMaxID(txn *sql.Tx) (id int64, err error) {
stmt := s.selectMaxIDStmt
if txn != nil {
stmt = txn.Stmt(stmt)
@ -218,7 +177,7 @@ func (s *outputRoomEventsStatements) MaxID(txn *sql.Tx) (id int64, err error) {
// InsertEvent into the output_room_events table. addState and removeState are an optional list of state event IDs. Returns the position
// of the inserted event.
func (s *outputRoomEventsStatements) InsertEvent(txn *sql.Tx, event *gomatrixserverlib.Event, addState, removeState []string) (streamPos int64, err error) {
func (s *outputRoomEventsStatements) insertEvent(txn *sql.Tx, event *gomatrixserverlib.Event, addState, removeState []string) (streamPos int64, err error) {
err = txn.Stmt(s.insertEventStmt).QueryRow(
event.RoomID(), event.EventID(), event.JSON(), pq.StringArray(addState), pq.StringArray(removeState),
).Scan(&streamPos)
@ -226,7 +185,9 @@ func (s *outputRoomEventsStatements) InsertEvent(txn *sql.Tx, event *gomatrixser
}
// RecentEventsInRoom returns the most recent events in the given room, up to a maximum of 'limit'.
func (s *outputRoomEventsStatements) RecentEventsInRoom(txn *sql.Tx, roomID string, fromPos, toPos types.StreamPosition, limit int) ([]streamEvent, error) {
func (s *outputRoomEventsStatements) selectRecentEvents(
txn *sql.Tx, roomID string, fromPos, toPos types.StreamPosition, limit int,
) ([]streamEvent, error) {
rows, err := s.selectRecentEventsStmt.Query(roomID, fromPos, toPos, limit)
if err != nil {
return nil, err
@ -243,7 +204,7 @@ func (s *outputRoomEventsStatements) RecentEventsInRoom(txn *sql.Tx, roomID stri
// Events returns the events for the given event IDs. Returns an error if any one of the event IDs given are missing
// from the database.
func (s *outputRoomEventsStatements) Events(txn *sql.Tx, eventIDs []string) ([]streamEvent, error) {
func (s *outputRoomEventsStatements) selectEvents(txn *sql.Tx, eventIDs []string) ([]streamEvent, error) {
rows, err := txn.Stmt(s.selectEventsStmt).Query(pq.StringArray(eventIDs))
if err != nil {
return nil, err

113
src/github.com/matrix-org/dendrite/syncapi/storage/syncserver.go
View file

@ -72,7 +72,7 @@ func NewSyncServerDatabase(dataSourceName string) (*SyncServerDatabase, error) {
// AllJoinedUsersInRooms returns a map of room ID to a list of all joined user IDs.
func (d *SyncServerDatabase) AllJoinedUsersInRooms() (map[string][]string, error) {
return d.roomstate.JoinedMemberLists()
return d.roomstate.selectJoinedUsers()
}
// WriteEvent into the database. It is not safe to call this function from multiple goroutines, as it would create races
@ -81,7 +81,7 @@ func (d *SyncServerDatabase) AllJoinedUsersInRooms() (map[string][]string, error
func (d *SyncServerDatabase) WriteEvent(ev *gomatrixserverlib.Event, addStateEventIDs, removeStateEventIDs []string) (streamPos types.StreamPosition, returnErr error) {
returnErr = runTransaction(d.db, func(txn *sql.Tx) error {
var err error
pos, err := d.events.InsertEvent(txn, ev, addStateEventIDs, removeStateEventIDs)
pos, err := d.events.insertEvent(txn, ev, addStateEventIDs, removeStateEventIDs)
if err != nil {
return err
}
@ -97,22 +97,49 @@ func (d *SyncServerDatabase) WriteEvent(ev *gomatrixserverlib.Event, addStateEve
// However, conflict resolution may result in there being different events being added, or even some removed.
if len(removeStateEventIDs) == 0 && len(addStateEventIDs) == 1 && addStateEventIDs[0] == ev.EventID() {
// common case
if err = d.roomstate.UpdateRoomState(txn, []gomatrixserverlib.Event{*ev}, nil); err != nil {
return err
}
return nil
return d.updateRoomState(txn, nil, []gomatrixserverlib.Event{*ev})
}
// uncommon case: we need to fetch the full event for each event ID mentioned, then update room state
added, err := d.events.Events(txn, addStateEventIDs)
added, err := d.events.selectEvents(txn, addStateEventIDs)
if err != nil {
return err
}
return d.roomstate.UpdateRoomState(txn, streamEventsToEvents(added), removeStateEventIDs)
return d.updateRoomState(txn, removeStateEventIDs, streamEventsToEvents(added))
})
return
}
func (d *SyncServerDatabase) updateRoomState(txn *sql.Tx, removedEventIDs []string, addedEvents []gomatrixserverlib.Event) error {
// remove first, then add, as we do not ever delete state, but do replace state which is a remove followed by an add.
for _, eventID := range removedEventIDs {
if err := d.roomstate.deleteRoomStateByEventID(txn, eventID); err != nil {
return err
}
}
for _, event := range addedEvents {
if event.StateKey() == nil {
// ignore non state events
continue
}
var membership *string
if event.Type() == "m.room.member" {
var memberContent events.MemberContent
if err := json.Unmarshal(event.Content(), &memberContent); err != nil {
return err
}
membership = &memberContent.Membership
}
if err := d.roomstate.upsertRoomState(txn, event, membership); err != nil {
return err
}
}
return nil
}
// PartitionOffsets implements common.PartitionStorer
func (d *SyncServerDatabase) PartitionOffsets(topic string) ([]common.PartitionOffset, error) {
return d.partitions.SelectPartitionOffsets(topic)
@ -125,7 +152,7 @@ func (d *SyncServerDatabase) SetPartitionOffset(topic string, partition int32, o
// SyncStreamPosition returns the latest position in the sync stream. Returns 0 if there are no events yet.
func (d *SyncServerDatabase) SyncStreamPosition() (types.StreamPosition, error) {
id, err := d.events.MaxID(nil)
id, err := d.events.selectMaxID(nil)
if err != nil {
return types.StreamPosition(0), err
}
@ -156,7 +183,7 @@ func (d *SyncServerDatabase) IncrementalSync(userID string, fromPos, toPos types
// This is all "okay" assuming history_visibility == "shared" which it is by default.
endPos = delta.membershipPos
}
recentStreamEvents, err := d.events.RecentEventsInRoom(txn, delta.roomID, fromPos, endPos, numRecentEventsPerRoom)
recentStreamEvents, err := d.events.selectRecentEvents(txn, delta.roomID, fromPos, endPos, numRecentEventsPerRoom)
if err != nil {
return err
}
@ -197,14 +224,14 @@ func (d *SyncServerDatabase) CompleteSync(userID string, numRecentEventsPerRoom
// but it's better to not hide the fact that this is being done in a transaction.
returnErr = runTransaction(d.db, func(txn *sql.Tx) error {
// Get the current stream position which we will base the sync response on.
id, err := d.events.MaxID(txn)
id, err := d.events.selectMaxID(txn)
if err != nil {
return err
}
pos := types.StreamPosition(id)
// Extract room state and recent events for all rooms the user is joined to.
roomIDs, err := d.roomstate.SelectRoomIDsWithMembership(txn, userID, "join")
roomIDs, err := d.roomstate.selectRoomIDsWithMembership(txn, userID, "join")
if err != nil {
return err
}
@ -212,13 +239,15 @@ func (d *SyncServerDatabase) CompleteSync(userID string, numRecentEventsPerRoom
// Build up a /sync response. Add joined rooms.
res = types.NewResponse(pos)
for _, roomID := range roomIDs {
stateEvents, err := d.roomstate.CurrentState(txn, roomID)
stateEvents, err := d.roomstate.selectCurrentState(txn, roomID)
if err != nil {
return err
}
// TODO: When filters are added, we may need to call this multiple times to get enough events.
// See: https://github.com/matrix-org/synapse/blob/v0.19.3/synapse/handlers/sync.py#L316
recentStreamEvents, err := d.events.RecentEventsInRoom(txn, roomID, types.StreamPosition(0), pos, numRecentEventsPerRoom)
recentStreamEvents, err := d.events.selectRecentEvents(
txn, roomID, types.StreamPosition(0), pos, numRecentEventsPerRoom,
)
if err != nil {
return err
}
@ -239,7 +268,7 @@ func (d *SyncServerDatabase) CompleteSync(userID string, numRecentEventsPerRoom
func (d *SyncServerDatabase) addInvitesToResponse(txn *sql.Tx, userID string, res *types.Response) error {
// Add invites - TODO: This will break over federation as they won't be in the current state table according to Mark.
roomIDs, err := d.roomstate.SelectRoomIDsWithMembership(txn, userID, "invite")
roomIDs, err := d.roomstate.selectRoomIDsWithMembership(txn, userID, "invite")
if err != nil {
return err
}
@ -251,6 +280,49 @@ func (d *SyncServerDatabase) addInvitesToResponse(txn *sql.Tx, userID string, re
return nil
}
// fetchStateEvents converts the set of event IDs into a set of events. It will fetch any which are missing from the database.
// Returns a map of room ID to list of events.
func (d *SyncServerDatabase) fetchStateEvents(txn *sql.Tx, roomIDToEventIDSet map[string]map[string]bool, eventIDToEvent map[string]streamEvent) (map[string][]streamEvent, error) {
stateBetween := make(map[string][]streamEvent)
missingEvents := make(map[string][]string)
for roomID, ids := range roomIDToEventIDSet {
events := stateBetween[roomID]
for id, need := range ids {
if !need {
continue // deleted state
}
e, ok := eventIDToEvent[id]
if ok {
events = append(events, e)
} else {
m := missingEvents[roomID]
m = append(m, id)
missingEvents[roomID] = m
}
}
stateBetween[roomID] = events
}
if len(missingEvents) > 0 {
// This happens when add_state_ids has an event ID which is not in the provided range.
// We need to explicitly fetch them.
allMissingEventIDs := []string{}
for _, missingEvIDs := range missingEvents {
allMissingEventIDs = append(allMissingEventIDs, missingEvIDs...)
}
evs, err := d.events.selectEvents(txn, allMissingEventIDs)
if err != nil {
return nil, err
}
// we know we got them all otherwise an error would've been returned, so just loop the events
for _, ev := range evs {
roomID := ev.RoomID()
stateBetween[roomID] = append(stateBetween[roomID], ev)
}
}
return stateBetween, nil
}
func (d *SyncServerDatabase) getStateDeltas(txn *sql.Tx, fromPos, toPos types.StreamPosition, userID string) ([]stateDelta, error) {
// Implement membership change algorithm: https://github.com/matrix-org/synapse/blob/v0.19.3/synapse/handlers/sync.py#L821
// - Get membership list changes for this user in this sync response
@ -263,10 +335,15 @@ func (d *SyncServerDatabase) getStateDeltas(txn *sql.Tx, fromPos, toPos types.St
var deltas []stateDelta
// get all the state events ever between these two positions
state, err := d.events.StateBetween(txn, fromPos, toPos)
stateNeeded, eventMap, err := d.events.selectStateInRange(txn, fromPos, toPos)
if err != nil {
return nil, err
}
state, err := d.fetchStateEvents(txn, stateNeeded, eventMap)
if err != nil {
return nil, err
}
for roomID, stateStreamEvents := range state {
for _, ev := range stateStreamEvents {
// TODO: Currently this will incorrectly add rooms which were ALREADY joined but they sent another no-op join event.
@ -278,7 +355,7 @@ func (d *SyncServerDatabase) getStateDeltas(txn *sql.Tx, fromPos, toPos types.St
if membership == "join" {
// send full room state down instead of a delta
var allState []gomatrixserverlib.Event
allState, err = d.roomstate.CurrentState(txn, roomID)
allState, err = d.roomstate.selectCurrentState(txn, roomID)
if err != nil {
return nil, err
}
@ -302,7 +379,7 @@ func (d *SyncServerDatabase) getStateDeltas(txn *sql.Tx, fromPos, toPos types.St
}
// Add in currently joined rooms
joinedRoomIDs, err := d.roomstate.SelectRoomIDsWithMembership(txn, userID, "join")
joinedRoomIDs, err := d.roomstate.selectRoomIDsWithMembership(txn, userID, "join")
if err != nil {
return nil, err
}