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syncapi: Rename and split out tokens (#1025)

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* syncapi: Rename and split out tokens

Previously we used the badly named `PaginationToken` which was
used for both `/sync` and `/messages` requests. This quickly
became confusing because named fields like `PDUPosition` meant
different things depending on the token type. Instead, we now have
two token types: `TopologyToken` and `StreamingToken`, both of
which have fields which make more sense for their specific situations.

Updated the codebase to use one or the other. `PaginationToken` still
lives on as `syncToken`, an unexported type which both tokens rely on.
This allows us to guarantee that the specific mappings of positions
to a string remain solely under the control of the `types` package.
This enables us to move high-level conceptual things like
"decrement this topological token" to function calls e.g
`TopologicalToken.Decrement()`.

Currently broken because `/messages` seemingly used both stream and
topological tokens, though I need to confirm this.

* final tweaks/hacks

* spurious logging

* Review comments and linting
This commit is contained in:
Kegsay 2020-05-13 12:14:50 +01:00 committed by GitHub
parent 31e6a7f193
commit 5e9dce1c0c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
15 changed files with 457 additions and 439 deletions
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2
syncapi/consumers/clientapi.go
View file

@ -90,7 +90,7 @@ func (s *OutputClientDataConsumer) onMessage(msg *sarama.ConsumerMessage) error
}).Panicf("could not save account data")
}
s.notifier.OnNewEvent(nil, "", []string{string(msg.Key)}, types.PaginationToken{PDUPosition: pduPos})
s.notifier.OnNewEvent(nil, "", []string{string(msg.Key)}, types.NewStreamToken(pduPos, 0))
return nil
}

6
syncapi/consumers/eduserver.go
View file

@ -65,9 +65,7 @@ func (s *OutputTypingEventConsumer) Start() error {
s.db.SetTypingTimeoutCallback(func(userID, roomID string, latestSyncPosition int64) {
s.notifier.OnNewEvent(
nil, roomID, nil,
types.PaginationToken{
EDUTypingPosition: types.StreamPosition(latestSyncPosition),
},
types.NewStreamToken(0, types.StreamPosition(latestSyncPosition)),
)
})
@ -96,6 +94,6 @@ func (s *OutputTypingEventConsumer) onMessage(msg *sarama.ConsumerMessage) error
typingPos = s.db.RemoveTypingUser(typingEvent.UserID, typingEvent.RoomID)
}
s.notifier.OnNewEvent(nil, output.Event.RoomID, nil, types.PaginationToken{EDUTypingPosition: typingPos})
s.notifier.OnNewEvent(nil, output.Event.RoomID, nil, types.NewStreamToken(0, typingPos))
return nil
}

4
syncapi/consumers/roomserver.go
View file

@ -146,7 +146,7 @@ func (s *OutputRoomEventConsumer) onNewRoomEvent(
}).Panicf("roomserver output log: write event failure")
return nil
}
s.notifier.OnNewEvent(&ev, "", nil, types.PaginationToken{PDUPosition: pduPos})
s.notifier.OnNewEvent(&ev, "", nil, types.NewStreamToken(pduPos, 0))
return nil
}
@ -164,7 +164,7 @@ func (s *OutputRoomEventConsumer) onNewInviteEvent(
}).Panicf("roomserver output log: write invite failure")
return nil
}
s.notifier.OnNewEvent(&msg.Event, "", nil, types.PaginationToken{PDUPosition: pduPos})
s.notifier.OnNewEvent(&msg.Event, "", nil, types.NewStreamToken(pduPos, 0))
return nil
}

77
syncapi/routing/messages.go
View file

@ -38,8 +38,9 @@ type messagesReq struct {
federation *gomatrixserverlib.FederationClient
cfg *config.Dendrite
roomID string
from *types.PaginationToken
to *types.PaginationToken
from *types.TopologyToken
to *types.TopologyToken
fromStream *types.StreamingToken
wasToProvided bool
limit int
backwardOrdering bool
@ -66,11 +67,16 @@ func OnIncomingMessagesRequest(
// Extract parameters from the request's URL.
// Pagination tokens.
from, err := types.NewPaginationTokenFromString(req.URL.Query().Get("from"))
var fromStream *types.StreamingToken
from, err := types.NewTopologyTokenFromString(req.URL.Query().Get("from"))
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue("Invalid from parameter: " + err.Error()),
fs, err2 := types.NewStreamTokenFromString(req.URL.Query().Get("from"))
fromStream = &fs
if err2 != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidArgumentValue("Invalid from parameter: " + err2.Error()),
}
}
}
@ -88,10 +94,10 @@ func OnIncomingMessagesRequest(
// Pagination tokens. To is optional, and its default value depends on the
// direction ("b" or "f").
var to *types.PaginationToken
var to types.TopologyToken
wasToProvided := true
if s := req.URL.Query().Get("to"); len(s) > 0 {
to, err = types.NewPaginationTokenFromString(s)
to, err = types.NewTopologyTokenFromString(s)
if err != nil {
return util.JSONResponse{
Code: http.StatusBadRequest,
@ -139,8 +145,9 @@ func OnIncomingMessagesRequest(
federation: federation,
cfg: cfg,
roomID: roomID,
from: from,
to: to,
from: &from,
to: &to,
fromStream: fromStream,
wasToProvided: wasToProvided,
limit: limit,
backwardOrdering: backwardOrdering,
@ -178,12 +185,20 @@ func OnIncomingMessagesRequest(
// remote homeserver.
func (r *messagesReq) retrieveEvents() (
clientEvents []gomatrixserverlib.ClientEvent, start,
end *types.PaginationToken, err error,
end types.TopologyToken, err error,
) {
// Retrieve the events from the local database.
streamEvents, err := r.db.GetEventsInRange(
r.ctx, r.from, r.to, r.roomID, r.limit, r.backwardOrdering,
)
var streamEvents []types.StreamEvent
if r.fromStream != nil {
toStream := r.to.StreamToken()
streamEvents, err = r.db.GetEventsInStreamingRange(
r.ctx, r.fromStream, &toStream, r.roomID, r.limit, r.backwardOrdering,
)
} else {
streamEvents, err = r.db.GetEventsInTopologicalRange(
r.ctx, r.from, r.to, r.roomID, r.limit, r.backwardOrdering,
)
}
if err != nil {
err = fmt.Errorf("GetEventsInRange: %w", err)
return
@ -206,7 +221,7 @@ func (r *messagesReq) retrieveEvents() (
// If we didn't get any event, we don't need to proceed any further.
if len(events) == 0 {
return []gomatrixserverlib.ClientEvent{}, r.from, r.to, nil
return []gomatrixserverlib.ClientEvent{}, *r.from, *r.to, nil
}
// Sort the events to ensure we send them in the right order.
@ -246,12 +261,8 @@ func (r *messagesReq) retrieveEvents() (
}
// Generate pagination tokens to send to the client using the positions
// retrieved previously.
start = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, startPos, startStreamPos,
)
end = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, endPos, endStreamPos,
)
start = types.NewTopologyToken(startPos, startStreamPos)
end = types.NewTopologyToken(endPos, endStreamPos)
if r.backwardOrdering {
// A stream/topological position is a cursor located between two events.
@ -259,14 +270,7 @@ func (r *messagesReq) retrieveEvents() (
// we consider a left to right chronological order), tokens need to refer
// to them by the event on their left, therefore we need to decrement the
// end position we send in the response if we're going backward.
end.PDUPosition--
end.EDUTypingPosition += 1000
}
// The lowest token value is 1, therefore we need to manually set it to that
// value if we're below it.
if end.PDUPosition < types.StreamPosition(1) {
end.PDUPosition = types.StreamPosition(1)
end.Decrement()
}
return clientEvents, start, end, err
@ -317,11 +321,11 @@ func (r *messagesReq) handleNonEmptyEventsSlice(streamEvents []types.StreamEvent
// The condition in the SQL query is a strict "greater than" so
// we need to check against to-1.
streamPos := types.StreamPosition(streamEvents[len(streamEvents)-1].StreamPosition)
isSetLargeEnough = (r.to.PDUPosition-1 == streamPos)
isSetLargeEnough = (r.to.PDUPosition()-1 == streamPos)
}
} else {
streamPos := types.StreamPosition(streamEvents[0].StreamPosition)
isSetLargeEnough = (r.from.PDUPosition-1 == streamPos)
isSetLargeEnough = (r.from.PDUPosition()-1 == streamPos)
}
}
@ -424,18 +428,17 @@ func (r *messagesReq) backfill(roomID string, fromEventIDs []string, limit int)
func setToDefault(
ctx context.Context, db storage.Database, backwardOrdering bool,
roomID string,
) (to *types.PaginationToken, err error) {
) (to types.TopologyToken, err error) {
if backwardOrdering {
// go 1 earlier than the first event so we correctly fetch the earliest event
to = types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
to = types.NewTopologyToken(0, 0)
} else {
var pos, stream types.StreamPosition
pos, stream, err = db.MaxTopologicalPosition(ctx, roomID)
var depth, stream types.StreamPosition
depth, stream, err = db.MaxTopologicalPosition(ctx, roomID)
if err != nil {
return
}
to = types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, pos, stream)
to = types.NewTopologyToken(depth, stream)
}
return

11
syncapi/storage/interface.go
View file

@ -50,13 +50,13 @@ type Database interface {
// Returns an error if there was an issue with the retrieval.
GetStateEventsForRoom(ctx context.Context, roomID string, stateFilterPart *gomatrixserverlib.StateFilter) (stateEvents []gomatrixserverlib.HeaderedEvent, err error)
// SyncPosition returns the latest positions for syncing.
SyncPosition(ctx context.Context) (types.PaginationToken, error)
SyncPosition(ctx context.Context) (types.StreamingToken, error)
// IncrementalSync returns all the data needed in order to create an incremental
// sync response for the given user. Events returned will include any client
// transaction IDs associated with the given device. These transaction IDs come
// from when the device sent the event via an API that included a transaction
// ID.
IncrementalSync(ctx context.Context, device authtypes.Device, fromPos, toPos types.PaginationToken, numRecentEventsPerRoom int, wantFullState bool) (*types.Response, error)
IncrementalSync(ctx context.Context, device authtypes.Device, fromPos, toPos types.StreamingToken, numRecentEventsPerRoom int, wantFullState bool) (*types.Response, error)
// CompleteSync returns a complete /sync API response for the given user.
CompleteSync(ctx context.Context, userID string, numRecentEventsPerRoom int) (*types.Response, error)
// GetAccountDataInRange returns all account data for a given user inserted or
@ -88,9 +88,10 @@ type Database interface {
// RemoveTypingUser removes a typing user from the typing cache.
// Returns the newly calculated sync position for typing notifications.
RemoveTypingUser(userID, roomID string) types.StreamPosition
// GetEventsInRange retrieves all of the events on a given ordering using the
// given extremities and limit.
GetEventsInRange(ctx context.Context, from, to *types.PaginationToken, roomID string, limit int, backwardOrdering bool) (events []types.StreamEvent, err 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, limit int, 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.
EventPositionInTopology(ctx context.Context, eventID string) (depth types.StreamPosition, stream types.StreamPosition, err error)
// EventsAtTopologicalPosition returns all of the events matching a given

127
syncapi/storage/postgres/syncserver.go
View file

@ -228,69 +228,68 @@ func (d *SyncServerDatasource) GetStateEventsForRoom(
return
}
func (d *SyncServerDatasource) GetEventsInRange(
func (d *SyncServerDatasource) GetEventsInTopologicalRange(
ctx context.Context,
from, to *types.PaginationToken,
from, to *types.TopologyToken,
roomID string, limit int,
backwardOrdering bool,
) (events []types.StreamEvent, err error) {
// If the pagination token's type is types.PaginationTokenTypeTopology, the
// events must be retrieved from the rooms' topology table rather than the
// table contaning the syncapi server's whole stream of events.
if from.Type == types.PaginationTokenTypeTopology {
// Determine the backward and forward limit, i.e. the upper and lower
// limits to the selection in the room's topology, from the direction.
var backwardLimit, forwardLimit, forwardMicroLimit types.StreamPosition
if backwardOrdering {
// Backward ordering is antichronological (latest event to oldest
// one).
backwardLimit = to.PDUPosition
forwardLimit = from.PDUPosition
forwardMicroLimit = from.EDUTypingPosition
} else {
// Forward ordering is chronological (oldest event to latest one).
backwardLimit = from.PDUPosition
forwardLimit = to.PDUPosition
}
// Determine the backward and forward limit, i.e. the upper and lower
// limits to the selection in the room's topology, from the direction.
var backwardLimit, forwardLimit, forwardMicroLimit types.StreamPosition
if backwardOrdering {
// Backward ordering is antichronological (latest event to oldest
// one).
backwardLimit = to.Depth()
forwardLimit = from.Depth()
forwardMicroLimit = from.PDUPosition()
} else {
// Forward ordering is chronological (oldest event to latest one).
backwardLimit = from.Depth()
forwardLimit = to.Depth()
}
// Select the event IDs from the defined range.
var eIDs []string
eIDs, err = d.topology.selectEventIDsInRange(
ctx, roomID, backwardLimit, forwardLimit, forwardMicroLimit, limit, !backwardOrdering,
)
if err != nil {
return
}
// Retrieve the events' contents using their IDs.
events, err = d.events.selectEvents(ctx, nil, eIDs)
// Select the event IDs from the defined range.
var eIDs []string
eIDs, err = d.topology.selectEventIDsInRange(
ctx, roomID, backwardLimit, forwardLimit, forwardMicroLimit, limit, !backwardOrdering,
)
if err != nil {
return
}
// If the pagination token's type is types.PaginationTokenTypeStream, the
// events must be retrieved from the table contaning the syncapi server's
// whole stream of events.
// Retrieve the events' contents using their IDs.
events, err = d.events.selectEvents(ctx, nil, eIDs)
return
}
// GetEventsInStreamingRange retrieves all of the events on a given ordering using the
// given extremities and limit.
func (d *SyncServerDatasource) GetEventsInStreamingRange(
ctx context.Context,
from, to *types.StreamingToken,
roomID string, limit int,
backwardOrdering bool,
) (events []types.StreamEvent, err error) {
if backwardOrdering {
// When using backward ordering, we want the most recent events first.
if events, err = d.events.selectRecentEvents(
ctx, nil, roomID, to.PDUPosition, from.PDUPosition, limit, false, false,
ctx, nil, roomID, to.PDUPosition(), from.PDUPosition(), limit, false, false,
); err != nil {
return
}
} else {
// When using forward ordering, we want the least recent events first.
if events, err = d.events.selectEarlyEvents(
ctx, nil, roomID, from.PDUPosition, to.PDUPosition, limit,
ctx, nil, roomID, from.PDUPosition(), to.PDUPosition(), limit,
); err != nil {
return
}
}
return
return events, err
}
func (d *SyncServerDatasource) SyncPosition(ctx context.Context) (types.PaginationToken, error) {
func (d *SyncServerDatasource) SyncPosition(ctx context.Context) (types.StreamingToken, error) {
return d.syncPositionTx(ctx, nil)
}
@ -353,7 +352,7 @@ func (d *SyncServerDatasource) syncStreamPositionTx(
func (d *SyncServerDatasource) syncPositionTx(
ctx context.Context, txn *sql.Tx,
) (sp types.PaginationToken, err error) {
) (sp types.StreamingToken, err error) {
maxEventID, err := d.events.selectMaxEventID(ctx, txn)
if err != nil {
@ -373,8 +372,7 @@ func (d *SyncServerDatasource) syncPositionTx(
if maxInviteID > maxEventID {
maxEventID = maxInviteID
}
sp.PDUPosition = types.StreamPosition(maxEventID)
sp.EDUTypingPosition = types.StreamPosition(d.eduCache.GetLatestSyncPosition())
sp = types.NewStreamToken(types.StreamPosition(maxEventID), types.StreamPosition(d.eduCache.GetLatestSyncPosition()))
return
}
@ -439,7 +437,7 @@ func (d *SyncServerDatasource) addPDUDeltaToResponse(
// addTypingDeltaToResponse adds all typing notifications to a sync response
// since the specified position.
func (d *SyncServerDatasource) addTypingDeltaToResponse(
since types.PaginationToken,
since types.StreamingToken,
joinedRoomIDs []string,
res *types.Response,
) error {
@ -448,7 +446,7 @@ func (d *SyncServerDatasource) addTypingDeltaToResponse(
var err error
for _, roomID := range joinedRoomIDs {
if typingUsers, updated := d.eduCache.GetTypingUsersIfUpdatedAfter(
roomID, int64(since.EDUTypingPosition),
roomID, int64(since.EDUPosition()),
); updated {
ev := gomatrixserverlib.ClientEvent{
Type: gomatrixserverlib.MTyping,
@ -473,12 +471,12 @@ func (d *SyncServerDatasource) addTypingDeltaToResponse(
// addEDUDeltaToResponse adds updates for EDUs of each type since fromPos if
// the positions of that type are not equal in fromPos and toPos.
func (d *SyncServerDatasource) addEDUDeltaToResponse(
fromPos, toPos types.PaginationToken,
fromPos, toPos types.StreamingToken,
joinedRoomIDs []string,
res *types.Response,
) (err error) {
if fromPos.EDUTypingPosition != toPos.EDUTypingPosition {
if fromPos.EDUPosition() != toPos.EDUPosition() {
err = d.addTypingDeltaToResponse(
fromPos, joinedRoomIDs, res,
)
@ -490,7 +488,7 @@ func (d *SyncServerDatasource) addEDUDeltaToResponse(
func (d *SyncServerDatasource) IncrementalSync(
ctx context.Context,
device authtypes.Device,
fromPos, toPos types.PaginationToken,
fromPos, toPos types.StreamingToken,
numRecentEventsPerRoom int,
wantFullState bool,
) (*types.Response, error) {
@ -499,9 +497,9 @@ func (d *SyncServerDatasource) IncrementalSync(
var joinedRoomIDs []string
var err error
if fromPos.PDUPosition != toPos.PDUPosition || wantFullState {
if fromPos.PDUPosition() != toPos.PDUPosition() || wantFullState {
joinedRoomIDs, err = d.addPDUDeltaToResponse(
ctx, device, fromPos.PDUPosition, toPos.PDUPosition, numRecentEventsPerRoom, wantFullState, res,
ctx, device, fromPos.PDUPosition(), toPos.PDUPosition(), numRecentEventsPerRoom, wantFullState, res,
)
} else {
joinedRoomIDs, err = d.roomstate.selectRoomIDsWithMembership(
@ -530,7 +528,7 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
numRecentEventsPerRoom int,
) (
res *types.Response,
toPos types.PaginationToken,
toPos types.StreamingToken,
joinedRoomIDs []string,
err error,
) {
@ -577,7 +575,7 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
// See: https://github.com/matrix-org/synapse/blob/v0.19.3/synapse/handlers/sync.py#L316
var recentStreamEvents []types.StreamEvent
recentStreamEvents, err = d.events.selectRecentEvents(
ctx, txn, roomID, types.StreamPosition(0), toPos.PDUPosition,
ctx, txn, roomID, types.StreamPosition(0), toPos.PDUPosition(),
numRecentEventsPerRoom, true, true,
)
if err != nil {
@ -588,27 +586,25 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
// oldest event in the room's topology.
var backwardTopologyPos, backwardStreamPos types.StreamPosition
backwardTopologyPos, backwardStreamPos, err = d.topology.selectPositionInTopology(ctx, recentStreamEvents[0].EventID())
if backwardTopologyPos-1 <= 0 {
backwardTopologyPos = types.StreamPosition(1)
} else {
backwardTopologyPos--
if err != nil {
return
}
prevBatch := types.NewTopologyToken(backwardTopologyPos, backwardStreamPos)
prevBatch.Decrement()
// We don't include a device here as we don't need to send down
// transaction IDs for complete syncs
recentEvents := d.StreamEventsToEvents(nil, recentStreamEvents)
stateEvents = removeDuplicates(stateEvents, recentEvents)
jr := types.NewJoinResponse()
jr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardStreamPos,
).String()
jr.Timeline.PrevBatch = prevBatch.String()
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = true
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(stateEvents, gomatrixserverlib.FormatSync)
res.Rooms.Join[roomID] = *jr
}
if err = d.addInvitesToResponse(ctx, txn, userID, 0, toPos.PDUPosition, res); err != nil {
if err = d.addInvitesToResponse(ctx, txn, userID, 0, toPos.PDUPosition(), res); err != nil {
return
}
@ -628,7 +624,7 @@ func (d *SyncServerDatasource) CompleteSync(
// Use a zero value SyncPosition for fromPos so all EDU states are added.
err = d.addEDUDeltaToResponse(
types.PaginationToken{}, toPos, joinedRoomIDs, res,
types.NewStreamToken(0, 0), toPos, joinedRoomIDs, res,
)
if err != nil {
return nil, err
@ -757,14 +753,15 @@ func (d *SyncServerDatasource) addRoomDeltaToResponse(
recentEvents := d.StreamEventsToEvents(device, recentStreamEvents)
delta.stateEvents = removeDuplicates(delta.stateEvents, recentEvents) // roll back
backwardTopologyPos, backwardStreamPos := d.getBackwardTopologyPos(ctx, recentStreamEvents)
prevBatch := types.NewTopologyToken(
backwardTopologyPos, backwardStreamPos,
)
switch delta.membership {
case gomatrixserverlib.Join:
jr := types.NewJoinResponse()
jr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardStreamPos,
).String()
jr.Timeline.PrevBatch = prevBatch.String()
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = false // TODO: if len(events) >= numRecents + 1 and then set limited:true
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.stateEvents, gomatrixserverlib.FormatSync)
@ -775,9 +772,7 @@ func (d *SyncServerDatasource) addRoomDeltaToResponse(
// TODO: recentEvents may contain events that this user is not allowed to see because they are
// no longer in the room.
lr := types.NewLeaveResponse()
lr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardStreamPos,
).String()
lr.Timeline.PrevBatch = prevBatch.String()
lr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
lr.Timeline.Limited = false // TODO: if len(events) >= numRecents + 1 and then set limited:true
lr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.stateEvents, gomatrixserverlib.FormatSync)

154
syncapi/storage/sqlite3/syncserver.go
View file

@ -269,63 +269,63 @@ func (d *SyncServerDatasource) GetStateEventsForRoom(
return
}
// GetEventsInRange retrieves all of the events on a given ordering using the
// GetEventsInTopologicalRange retrieves all of the events on a given ordering using the
// given extremities and limit.
func (d *SyncServerDatasource) GetEventsInRange(
func (d *SyncServerDatasource) GetEventsInTopologicalRange(
ctx context.Context,
from, to *types.PaginationToken,
from, to *types.TopologyToken,
roomID string, limit int,
backwardOrdering bool,
) (events []types.StreamEvent, err error) {
// If the pagination token's type is types.PaginationTokenTypeTopology, the
// events must be retrieved from the rooms' topology table rather than the
// table contaning the syncapi server's whole stream of events.
if from.Type == types.PaginationTokenTypeTopology {
// TODO: ARGH CONFUSING
// Determine the backward and forward limit, i.e. the upper and lower
// limits to the selection in the room's topology, from the direction.
var backwardLimit, forwardLimit, forwardMicroLimit types.StreamPosition
if backwardOrdering {
// Backward ordering is antichronological (latest event to oldest
// one).
backwardLimit = to.PDUPosition
forwardLimit = from.PDUPosition
forwardMicroLimit = from.EDUTypingPosition
} else {
// Forward ordering is chronological (oldest event to latest one).
backwardLimit = from.PDUPosition
forwardLimit = to.PDUPosition
}
// TODO: ARGH CONFUSING
// Determine the backward and forward limit, i.e. the upper and lower
// limits to the selection in the room's topology, from the direction.
var backwardLimit, forwardLimit, forwardMicroLimit types.StreamPosition
if backwardOrdering {
// Backward ordering is antichronological (latest event to oldest
// one).
backwardLimit = to.Depth()
forwardLimit = from.Depth()
forwardMicroLimit = from.PDUPosition()
} else {
// Forward ordering is chronological (oldest event to latest one).
backwardLimit = from.Depth()
forwardLimit = to.Depth()
}
// Select the event IDs from the defined range.
var eIDs []string
eIDs, err = d.topology.selectEventIDsInRange(
ctx, nil, roomID, backwardLimit, forwardLimit, forwardMicroLimit, limit, !backwardOrdering,
)
if err != nil {
return
}
// Retrieve the events' contents using their IDs.
events, err = d.events.selectEvents(ctx, nil, eIDs)
// Select the event IDs from the defined range.
var eIDs []string
eIDs, err = d.topology.selectEventIDsInRange(
ctx, nil, roomID, backwardLimit, forwardLimit, forwardMicroLimit, limit, !backwardOrdering,
)
if err != nil {
return
}
// If the pagination token's type is types.PaginationTokenTypeStream, the
// events must be retrieved from the table contaning the syncapi server's
// whole stream of events.
// Retrieve the events' contents using their IDs.
events, err = d.events.selectEvents(ctx, nil, eIDs)
return
}
// GetEventsInStreamingRange retrieves all of the events on a given ordering using the
// given extremities and limit.
func (d *SyncServerDatasource) GetEventsInStreamingRange(
ctx context.Context,
from, to *types.StreamingToken,
roomID string, limit int,
backwardOrdering bool,
) (events []types.StreamEvent, err error) {
if backwardOrdering {
// When using backward ordering, we want the most recent events first.
if events, err = d.events.selectRecentEvents(
ctx, nil, roomID, to.PDUPosition, from.PDUPosition, limit, false, false,
ctx, nil, roomID, to.PDUPosition(), from.PDUPosition(), limit, false, false,
); err != nil {
return
}
} else {
// When using forward ordering, we want the least recent events first.
if events, err = d.events.selectEarlyEvents(
ctx, nil, roomID, from.PDUPosition, to.PDUPosition, limit,
ctx, nil, roomID, from.PDUPosition(), to.PDUPosition(), limit,
); err != nil {
return
}
@ -334,10 +334,14 @@ func (d *SyncServerDatasource) GetEventsInRange(
}
// SyncPosition returns the latest positions for syncing.
func (d *SyncServerDatasource) SyncPosition(ctx context.Context) (tok types.PaginationToken, err error) {
func (d *SyncServerDatasource) SyncPosition(ctx context.Context) (tok types.StreamingToken, err error) {
err = common.WithTransaction(d.db, func(txn *sql.Tx) error {
tok, err = d.syncPositionTx(ctx, txn)
return err
pos, err := d.syncPositionTx(ctx, txn)
if err != nil {
return err
}
tok = *pos
return nil
})
return
}
@ -412,30 +416,31 @@ func (d *SyncServerDatasource) syncStreamPositionTx(
func (d *SyncServerDatasource) syncPositionTx(
ctx context.Context, txn *sql.Tx,
) (sp types.PaginationToken, err error) {
) (*types.StreamingToken, error) {
maxEventID, err := d.events.selectMaxEventID(ctx, txn)
if err != nil {
return sp, err
return nil, err
}
maxAccountDataID, err := d.accountData.selectMaxAccountDataID(ctx, txn)
if err != nil {
return sp, err
return nil, err
}
if maxAccountDataID > maxEventID {
maxEventID = maxAccountDataID
}
maxInviteID, err := d.invites.selectMaxInviteID(ctx, txn)
if err != nil {
return sp, err
return nil, err
}
if maxInviteID > maxEventID {
maxEventID = maxInviteID
}
sp.PDUPosition = types.StreamPosition(maxEventID)
sp.EDUTypingPosition = types.StreamPosition(d.eduCache.GetLatestSyncPosition())
sp.Type = types.PaginationTokenTypeStream
return
sp := types.NewStreamToken(
types.StreamPosition(maxEventID),
types.StreamPosition(d.eduCache.GetLatestSyncPosition()),
)
return &sp, nil
}
// addPDUDeltaToResponse adds all PDU deltas to a sync response.
@ -499,7 +504,7 @@ func (d *SyncServerDatasource) addPDUDeltaToResponse(
// addTypingDeltaToResponse adds all typing notifications to a sync response
// since the specified position.
func (d *SyncServerDatasource) addTypingDeltaToResponse(
since types.PaginationToken,
since types.StreamingToken,
joinedRoomIDs []string,
res *types.Response,
) error {
@ -508,7 +513,7 @@ func (d *SyncServerDatasource) addTypingDeltaToResponse(
var err error
for _, roomID := range joinedRoomIDs {
if typingUsers, updated := d.eduCache.GetTypingUsersIfUpdatedAfter(
roomID, int64(since.EDUTypingPosition),
roomID, int64(since.EDUPosition()),
); updated {
ev := gomatrixserverlib.ClientEvent{
Type: gomatrixserverlib.MTyping,
@ -533,12 +538,12 @@ func (d *SyncServerDatasource) addTypingDeltaToResponse(
// addEDUDeltaToResponse adds updates for EDUs of each type since fromPos if
// the positions of that type are not equal in fromPos and toPos.
func (d *SyncServerDatasource) addEDUDeltaToResponse(
fromPos, toPos types.PaginationToken,
fromPos, toPos types.StreamingToken,
joinedRoomIDs []string,
res *types.Response,
) (err error) {
if fromPos.EDUTypingPosition != toPos.EDUTypingPosition {
if fromPos.EDUPosition() != toPos.EDUPosition() {
err = d.addTypingDeltaToResponse(
fromPos, joinedRoomIDs, res,
)
@ -555,18 +560,21 @@ func (d *SyncServerDatasource) addEDUDeltaToResponse(
func (d *SyncServerDatasource) IncrementalSync(
ctx context.Context,
device authtypes.Device,
fromPos, toPos types.PaginationToken,
fromPos, toPos types.StreamingToken,
numRecentEventsPerRoom int,
wantFullState bool,
) (*types.Response, error) {
fmt.Println("from ", fromPos, "to", toPos)
nextBatchPos := fromPos.WithUpdates(toPos)
res := types.NewResponse(nextBatchPos)
fmt.Println("from ", fromPos, "to", toPos, "next", nextBatchPos)
var joinedRoomIDs []string
var err error
if fromPos.PDUPosition != toPos.PDUPosition || wantFullState {
fmt.Println("from", fromPos.PDUPosition(), "to", toPos.PDUPosition())
if fromPos.PDUPosition() != toPos.PDUPosition() || wantFullState {
joinedRoomIDs, err = d.addPDUDeltaToResponse(
ctx, device, fromPos.PDUPosition, toPos.PDUPosition, numRecentEventsPerRoom, wantFullState, res,
ctx, device, fromPos.PDUPosition(), toPos.PDUPosition(), numRecentEventsPerRoom, wantFullState, res,
)
} else {
joinedRoomIDs, err = d.roomstate.selectRoomIDsWithMembership(
@ -595,7 +603,7 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
numRecentEventsPerRoom int,
) (
res *types.Response,
toPos types.PaginationToken,
toPos *types.StreamingToken,
joinedRoomIDs []string,
err error,
) {
@ -621,7 +629,7 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
return
}
res = types.NewResponse(toPos)
res = types.NewResponse(*toPos)
// Extract room state and recent events for all rooms the user is joined to.
joinedRoomIDs, err = d.roomstate.selectRoomIDsWithMembership(ctx, txn, userID, gomatrixserverlib.Join)
@ -643,7 +651,7 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
// See: https://github.com/matrix-org/synapse/blob/v0.19.3/synapse/handlers/sync.py#L316
var recentStreamEvents []types.StreamEvent
recentStreamEvents, err = d.events.selectRecentEvents(
ctx, txn, roomID, types.StreamPosition(0), toPos.PDUPosition,
ctx, txn, roomID, types.StreamPosition(0), toPos.PDUPosition(),
numRecentEventsPerRoom, true, true,
)
if err != nil {
@ -655,28 +663,22 @@ func (d *SyncServerDatasource) getResponseWithPDUsForCompleteSync(
// oldest event in the room's topology.
var backwardTopologyPos, backwardTopologyStreamPos types.StreamPosition
backwardTopologyPos, backwardTopologyStreamPos, err = d.topology.selectPositionInTopology(ctx, txn, recentStreamEvents[0].EventID())
if backwardTopologyPos-1 <= 0 {
backwardTopologyPos = types.StreamPosition(1)
} else {
backwardTopologyPos--
backwardTopologyStreamPos += 1000 // this has to be bigger than the number of events we backfill per request
}
prevBatch := types.NewTopologyToken(backwardTopologyPos, backwardTopologyStreamPos)
prevBatch.Decrement()
// We don't include a device here as we don't need to send down
// transaction IDs for complete syncs
recentEvents := d.StreamEventsToEvents(nil, recentStreamEvents)
stateEvents = removeDuplicates(stateEvents, recentEvents)
jr := types.NewJoinResponse()
jr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardTopologyStreamPos,
).String()
jr.Timeline.PrevBatch = prevBatch.String()
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = true
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(stateEvents, gomatrixserverlib.FormatSync)
res.Rooms.Join[roomID] = *jr
}
if err = d.addInvitesToResponse(ctx, txn, userID, 0, toPos.PDUPosition, res); err != nil {
if err = d.addInvitesToResponse(ctx, txn, userID, 0, toPos.PDUPosition(), res); err != nil {
return
}
@ -697,7 +699,7 @@ func (d *SyncServerDatasource) CompleteSync(
// Use a zero value SyncPosition for fromPos so all EDU states are added.
err = d.addEDUDeltaToResponse(
types.PaginationToken{}, toPos, joinedRoomIDs, res,
types.NewStreamToken(0, 0), *toPos, joinedRoomIDs, res,
)
if err != nil {
return nil, err
@ -860,14 +862,14 @@ func (d *SyncServerDatasource) addRoomDeltaToResponse(
recentEvents := d.StreamEventsToEvents(device, recentStreamEvents)
delta.stateEvents = removeDuplicates(delta.stateEvents, recentEvents)
backwardTopologyPos, backwardStreamPos := d.getBackwardTopologyPos(ctx, txn, recentStreamEvents)
prevBatch := types.NewTopologyToken(
backwardTopologyPos, backwardStreamPos,
)
switch delta.membership {
case gomatrixserverlib.Join:
jr := types.NewJoinResponse()
jr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardStreamPos,
).String()
jr.Timeline.PrevBatch = prevBatch.String()
jr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
jr.Timeline.Limited = false // TODO: if len(events) >= numRecents + 1 and then set limited:true
jr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.stateEvents, gomatrixserverlib.FormatSync)
@ -878,9 +880,7 @@ func (d *SyncServerDatasource) addRoomDeltaToResponse(
// TODO: recentEvents may contain events that this user is not allowed to see because they are
// no longer in the room.
lr := types.NewLeaveResponse()
lr.Timeline.PrevBatch = types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeTopology, backwardTopologyPos, backwardStreamPos,
).String()
lr.Timeline.PrevBatch = prevBatch.String()
lr.Timeline.Events = gomatrixserverlib.HeaderedToClientEvents(recentEvents, gomatrixserverlib.FormatSync)
lr.Timeline.Limited = false // TODO: if len(events) >= numRecents + 1 and then set limited:true
lr.State.Events = gomatrixserverlib.HeaderedToClientEvents(delta.stateEvents, gomatrixserverlib.FormatSync)

64
syncapi/storage/storage_test.go
View file

@ -154,10 +154,10 @@ func TestSyncResponse(t *testing.T) {
{
Name: "IncrementalSync penultimate",
DoSync: func() (*types.Response, error) {
from := types.NewPaginationTokenFromTypeAndPosition( // pretend we are at the penultimate event
types.PaginationTokenTypeStream, positions[len(positions)-2], types.StreamPosition(0),
from := types.NewStreamToken( // pretend we are at the penultimate event
positions[len(positions)-2], types.StreamPosition(0),
)
return db.IncrementalSync(ctx, testUserDeviceA, *from, latest, 5, false)
return db.IncrementalSync(ctx, testUserDeviceA, from, latest, 5, false)
},
WantTimeline: events[len(events)-1:],
},
@ -166,11 +166,11 @@ func TestSyncResponse(t *testing.T) {
{
Name: "IncrementalSync limited",
DoSync: func() (*types.Response, error) {
from := types.NewPaginationTokenFromTypeAndPosition( // pretend we are 10 events behind
types.PaginationTokenTypeStream, positions[len(positions)-11], types.StreamPosition(0),
from := types.NewStreamToken( // pretend we are 10 events behind
positions[len(positions)-11], types.StreamPosition(0),
)
// limit is set to 5
return db.IncrementalSync(ctx, testUserDeviceA, *from, latest, 5, false)
return db.IncrementalSync(ctx, testUserDeviceA, from, latest, 5, false)
},
// want the last 5 events, NOT the last 10.
WantTimeline: events[len(events)-5:],
@ -207,7 +207,7 @@ func TestSyncResponse(t *testing.T) {
if err != nil {
st.Fatalf("failed to do sync: %s", err)
}
next := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeStream, latest.PDUPosition, latest.EDUTypingPosition)
next := types.NewStreamToken(latest.PDUPosition(), latest.EDUPosition())
if res.NextBatch != next.String() {
st.Errorf("NextBatch got %s want %s", res.NextBatch, next.String())
}
@ -230,11 +230,11 @@ func TestGetEventsInRangeWithPrevBatch(t *testing.T) {
if err != nil {
t.Fatalf("failed to get SyncPosition: %s", err)
}
from := types.NewPaginationTokenFromTypeAndPosition(
types.PaginationTokenTypeStream, positions[len(positions)-2], types.StreamPosition(0),
from := types.NewStreamToken(
positions[len(positions)-2], types.StreamPosition(0),
)
res, err := db.IncrementalSync(ctx, testUserDeviceA, *from, latest, 5, false)
res, err := db.IncrementalSync(ctx, testUserDeviceA, from, latest, 5, false)
if err != nil {
t.Fatalf("failed to IncrementalSync with latest token")
}
@ -249,14 +249,14 @@ func TestGetEventsInRangeWithPrevBatch(t *testing.T) {
if prev == "" {
t.Fatalf("IncrementalSync expected prev_batch token")
}
prevBatchToken, err := types.NewPaginationTokenFromString(prev)
prevBatchToken, err := types.NewTopologyTokenFromString(prev)
if err != nil {
t.Fatalf("failed to NewPaginationTokenFromString : %s", err)
t.Fatalf("failed to NewTopologyTokenFromString : %s", err)
}
// backpaginate 5 messages starting at the latest position.
// head towards the beginning of time
to := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
paginatedEvents, err := db.GetEventsInRange(ctx, prevBatchToken, to, testRoomID, 5, true)
to := types.NewTopologyToken(0, 0)
paginatedEvents, err := db.GetEventsInTopologicalRange(ctx, &prevBatchToken, &to, testRoomID, 5, true)
if err != nil {
t.Fatalf("GetEventsInRange returned an error: %s", err)
}
@ -275,10 +275,10 @@ func TestGetEventsInRangeWithStreamToken(t *testing.T) {
t.Fatalf("failed to get SyncPosition: %s", err)
}
// head towards the beginning of time
to := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
to := types.NewStreamToken(0, 0)
// backpaginate 5 messages starting at the latest position.
paginatedEvents, err := db.GetEventsInRange(ctx, &latest, to, testRoomID, 5, true)
paginatedEvents, err := db.GetEventsInStreamingRange(ctx, &latest, &to, testRoomID, 5, true)
if err != nil {
t.Fatalf("GetEventsInRange returned an error: %s", err)
}
@ -296,12 +296,12 @@ func TestGetEventsInRangeWithTopologyToken(t *testing.T) {
if err != nil {
t.Fatalf("failed to get MaxTopologicalPosition: %s", err)
}
from := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, latest, latestStream)
from := types.NewTopologyToken(latest, latestStream)
// head towards the beginning of time
to := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
to := types.NewTopologyToken(0, 0)
// backpaginate 5 messages starting at the latest position.
paginatedEvents, err := db.GetEventsInRange(ctx, from, to, testRoomID, 5, true)
paginatedEvents, err := db.GetEventsInTopologicalRange(ctx, &from, &to, testRoomID, 5, true)
if err != nil {
t.Fatalf("GetEventsInRange returned an error: %s", err)
}
@ -366,14 +366,14 @@ func TestGetEventsInRangeWithEventsSameDepth(t *testing.T) {
if err != nil {
t.Fatalf("failed to get EventPositionInTopology for event: %s", err)
}
fromLatest := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, latestPos, latestStreamPos)
fromFork := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, topoPos, streamPos)
fromLatest := types.NewTopologyToken(latestPos, latestStreamPos)
fromFork := types.NewTopologyToken(topoPos, streamPos)
// head towards the beginning of time
to := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
to := types.NewTopologyToken(0, 0)
testCases := []struct {
Name string
From *types.PaginationToken
From types.TopologyToken
Limit int
Wants []gomatrixserverlib.HeaderedEvent
}{
@ -399,7 +399,7 @@ func TestGetEventsInRangeWithEventsSameDepth(t *testing.T) {
for _, tc := range testCases {
// backpaginate messages starting at the latest position.
paginatedEvents, err := db.GetEventsInRange(ctx, tc.From, to, testRoomID, tc.Limit, true)
paginatedEvents, err := db.GetEventsInTopologicalRange(ctx, &tc.From, &to, testRoomID, tc.Limit, true)
if err != nil {
t.Fatalf("%s GetEventsInRange returned an error: %s", tc.Name, err)
}
@ -446,13 +446,13 @@ func TestGetEventsInRangeWithEventsInsertedLikeBackfill(t *testing.T) {
}
// head towards the beginning of time
to := types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, 0, 0)
to := types.NewTopologyToken(0, 0)
// starting at `from`, backpaginate to the beginning of time, asserting as we go.
chunkSize = 3
events = reversed(events)
for i := 0; i < len(events); i += chunkSize {
paginatedEvents, err := db.GetEventsInRange(ctx, from, to, testRoomID, chunkSize, true)
paginatedEvents, err := db.GetEventsInTopologicalRange(ctx, from, &to, testRoomID, chunkSize, true)
if err != nil {
t.Fatalf("GetEventsInRange returned an error: %s", err)
}
@ -506,19 +506,15 @@ func assertEventsEqual(t *testing.T, msg string, checkRoomID bool, gots []gomatr
}
}
func topologyTokenBefore(t *testing.T, db storage.Database, eventID string) *types.PaginationToken {
func topologyTokenBefore(t *testing.T, db storage.Database, eventID string) *types.TopologyToken {
pos, spos, err := db.EventPositionInTopology(ctx, eventID)
if err != nil {
t.Fatalf("failed to get EventPositionInTopology: %s", err)
}
if pos-1 <= 0 {
pos = types.StreamPosition(1)
} else {
pos = pos - 1
spos += 1000 // this has to be bigger than the chunk limit
}
return types.NewPaginationTokenFromTypeAndPosition(types.PaginationTokenTypeTopology, pos, spos)
tok := types.NewTopologyToken(pos, spos)
tok.Decrement()
return &tok
}
func reversed(in []gomatrixserverlib.HeaderedEvent) []gomatrixserverlib.HeaderedEvent {

10
syncapi/sync/notifier.go
View file

@ -36,7 +36,7 @@ type Notifier struct {
// Protects currPos and userStreams.
streamLock *sync.Mutex
// The latest sync position
currPos types.PaginationToken
currPos types.StreamingToken
// A map of user_id => UserStream which can be used to wake a given user's /sync request.
userStreams map[string]*UserStream
// The last time we cleaned out stale entries from the userStreams map
@ -46,7 +46,7 @@ type Notifier struct {
// NewNotifier creates a new notifier set to the given sync position.
// In order for this to be of any use, the Notifier needs to be told all rooms and
// the joined users within each of them by calling Notifier.Load(*storage.SyncServerDatabase).
func NewNotifier(pos types.PaginationToken) *Notifier {
func NewNotifier(pos types.StreamingToken) *Notifier {
return &Notifier{
currPos: pos,
roomIDToJoinedUsers: make(map[string]userIDSet),
@ -68,7 +68,7 @@ func NewNotifier(pos types.PaginationToken) *Notifier {
// event type it handles, leaving other fields as 0.
func (n *Notifier) OnNewEvent(
ev *gomatrixserverlib.HeaderedEvent, roomID string, userIDs []string,
posUpdate types.PaginationToken,
posUpdate types.StreamingToken,
) {
// update the current position then notify relevant /sync streams.
// This needs to be done PRIOR to waking up users as they will read this value.
@ -151,7 +151,7 @@ func (n *Notifier) Load(ctx context.Context, db storage.Database) error {
}
// CurrentPosition returns the current sync position
func (n *Notifier) CurrentPosition() types.PaginationToken {
func (n *Notifier) CurrentPosition() types.StreamingToken {
n.streamLock.Lock()
defer n.streamLock.Unlock()
@ -173,7 +173,7 @@ func (n *Notifier) setUsersJoinedToRooms(roomIDToUserIDs map[string][]string) {
}
}
func (n *Notifier) wakeupUsers(userIDs []string, newPos types.PaginationToken) {
func (n *Notifier) wakeupUsers(userIDs []string, newPos types.StreamingToken) {
for _, userID := range userIDs {
stream := n.fetchUserStream(userID, false)
if stream != nil {

70
syncapi/sync/notifier_test.go
View file

@ -33,11 +33,11 @@ var (
randomMessageEvent gomatrixserverlib.HeaderedEvent
aliceInviteBobEvent gomatrixserverlib.HeaderedEvent
bobLeaveEvent gomatrixserverlib.HeaderedEvent
syncPositionVeryOld types.PaginationToken
syncPositionBefore types.PaginationToken
syncPositionAfter types.PaginationToken
syncPositionNewEDU types.PaginationToken
syncPositionAfter2 types.PaginationToken
syncPositionVeryOld = types.NewStreamToken(5, 0)
syncPositionBefore = types.NewStreamToken(11, 0)
syncPositionAfter = types.NewStreamToken(12, 0)
syncPositionNewEDU = types.NewStreamToken(syncPositionAfter.PDUPosition(), 1)
syncPositionAfter2 = types.NewStreamToken(13, 0)
)
var (
@ -47,26 +47,6 @@ var (
)
func init() {
baseSyncPos := types.PaginationToken{
PDUPosition: 0,
EDUTypingPosition: 0,
}
syncPositionVeryOld = baseSyncPos
syncPositionVeryOld.PDUPosition = 5
syncPositionBefore = baseSyncPos
syncPositionBefore.PDUPosition = 11
syncPositionAfter = baseSyncPos
syncPositionAfter.PDUPosition = 12
syncPositionNewEDU = syncPositionAfter
syncPositionNewEDU.EDUTypingPosition = 1
syncPositionAfter2 = baseSyncPos
syncPositionAfter2.PDUPosition = 13
var err error
err = json.Unmarshal([]byte(`{
"_room_version": "1",
@ -118,6 +98,12 @@ func init() {
}
}
func mustEqualPositions(t *testing.T, got, want types.StreamingToken) {
if got.String() != want.String() {
t.Fatalf("mustEqualPositions got %s want %s", got.String(), want.String())
}
}
// Test that the current position is returned if a request is already behind.
func TestImmediateNotification(t *testing.T) {
n := NewNotifier(syncPositionBefore)
@ -125,9 +111,7 @@ func TestImmediateNotification(t *testing.T) {
if err != nil {
t.Fatalf("TestImmediateNotification error: %s", err)
}
if pos != syncPositionBefore {
t.Fatalf("TestImmediateNotification want %v, got %v", syncPositionBefore, pos)
}
mustEqualPositions(t, pos, syncPositionBefore)
}
// Test that new events to a joined room unblocks the request.
@ -144,9 +128,7 @@ func TestNewEventAndJoinedToRoom(t *testing.T) {
if err != nil {
t.Errorf("TestNewEventAndJoinedToRoom error: %w", err)
}
if pos != syncPositionAfter {
t.Errorf("TestNewEventAndJoinedToRoom want %v, got %v", syncPositionAfter, pos)
}
mustEqualPositions(t, pos, syncPositionAfter)
wg.Done()
}()
@ -172,9 +154,7 @@ func TestNewInviteEventForUser(t *testing.T) {
if err != nil {
t.Errorf("TestNewInviteEventForUser error: %w", err)
}
if pos != syncPositionAfter {
t.Errorf("TestNewInviteEventForUser want %v, got %v", syncPositionAfter, pos)
}
mustEqualPositions(t, pos, syncPositionAfter)
wg.Done()
}()
@ -200,9 +180,7 @@ func TestEDUWakeup(t *testing.T) {
if err != nil {
t.Errorf("TestNewInviteEventForUser error: %w", err)
}
if pos != syncPositionNewEDU {
t.Errorf("TestNewInviteEventForUser want %v, got %v", syncPositionNewEDU, pos)
}
mustEqualPositions(t, pos, syncPositionNewEDU)
wg.Done()
}()
@ -228,9 +206,7 @@ func TestMultipleRequestWakeup(t *testing.T) {
if err != nil {
t.Errorf("TestMultipleRequestWakeup error: %w", err)
}
if pos != syncPositionAfter {
t.Errorf("TestMultipleRequestWakeup want %v, got %v", syncPositionAfter, pos)
}
mustEqualPositions(t, pos, syncPositionAfter)
wg.Done()
}
go poll()
@ -268,9 +244,7 @@ func TestNewEventAndWasPreviouslyJoinedToRoom(t *testing.T) {
if err != nil {
t.Errorf("TestNewEventAndWasPreviouslyJoinedToRoom error: %w", err)
}
if pos != syncPositionAfter {
t.Errorf("TestNewEventAndWasPreviouslyJoinedToRoom want %v, got %v", syncPositionAfter, pos)
}
mustEqualPositions(t, pos, syncPositionAfter)
leaveWG.Done()
}()
bobStream := lockedFetchUserStream(n, bob)
@ -287,9 +261,7 @@ func TestNewEventAndWasPreviouslyJoinedToRoom(t *testing.T) {
if err != nil {
t.Errorf("TestNewEventAndWasPreviouslyJoinedToRoom error: %w", err)
}
if pos != syncPositionAfter2 {
t.Errorf("TestNewEventAndWasPreviouslyJoinedToRoom want %v, got %v", syncPositionAfter2, pos)
}
mustEqualPositions(t, pos, syncPositionAfter2)
aliceWG.Done()
}()
@ -312,13 +284,13 @@ func TestNewEventAndWasPreviouslyJoinedToRoom(t *testing.T) {
time.Sleep(1 * time.Millisecond)
}
func waitForEvents(n *Notifier, req syncRequest) (types.PaginationToken, error) {
func waitForEvents(n *Notifier, req syncRequest) (types.StreamingToken, error) {
listener := n.GetListener(req)
defer listener.Close()
select {
case <-time.After(5 * time.Second):
return types.PaginationToken{}, fmt.Errorf(
return types.StreamingToken{}, fmt.Errorf(
"waitForEvents timed out waiting for %s (pos=%v)", req.device.UserID, req.since,
)
case <-listener.GetNotifyChannel(*req.since):
@ -344,7 +316,7 @@ func lockedFetchUserStream(n *Notifier, userID string) *UserStream {
return n.fetchUserStream(userID, true)
}
func newTestSyncRequest(userID string, since types.PaginationToken) syncRequest {
func newTestSyncRequest(userID string, since types.StreamingToken) syncRequest {
return syncRequest{
device: authtypes.Device{UserID: userID},
timeout: 1 * time.Minute,

26
syncapi/sync/request.go
View file

@ -36,7 +36,7 @@ type syncRequest struct {
device authtypes.Device
limit int
timeout time.Duration
since *types.PaginationToken // nil means that no since token was supplied
since *types.StreamingToken // nil means that no since token was supplied
wantFullState bool
log *log.Entry
}
@ -45,9 +45,14 @@ func newSyncRequest(req *http.Request, device authtypes.Device) (*syncRequest, e
timeout := getTimeout(req.URL.Query().Get("timeout"))
fullState := req.URL.Query().Get("full_state")
wantFullState := fullState != "" && fullState != "false"
since, err := getPaginationToken(req.URL.Query().Get("since"))
if err != nil {
return nil, err
var since *types.StreamingToken
sinceStr := req.URL.Query().Get("since")
if sinceStr != "" {
tok, err := types.NewStreamTokenFromString(sinceStr)
if err != nil {
return nil, err
}
since = &tok
}
// TODO: Additional query params: set_presence, filter
return &syncRequest{
@ -71,16 +76,3 @@ func getTimeout(timeoutMS string) time.Duration {
}
return time.Duration(i) * time.Millisecond
}
// getSyncStreamPosition tries to parse a 'since' token taken from the API to a
// types.PaginationToken. If the string is empty then (nil, nil) is returned.
// There are two forms of tokens: The full length form containing all PDU and EDU
// positions separated by "_", and the short form containing only the PDU
// position. Short form can be used for, e.g., `prev_batch` tokens.
func getPaginationToken(since string) (*types.PaginationToken, error) {
if since == "" {
return nil, nil
}
return types.NewPaginationTokenFromString(since)
}

6
syncapi/sync/requestpool.go
View file

@ -132,7 +132,7 @@ func (rp *RequestPool) OnIncomingSyncRequest(req *http.Request, device *authtype
}
}
func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.PaginationToken) (res *types.Response, err error) {
func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.StreamingToken) (res *types.Response, err error) {
// TODO: handle ignored users
if req.since == nil {
res, err = rp.db.CompleteSync(req.ctx, req.device.UserID, req.limit)
@ -145,7 +145,7 @@ func (rp *RequestPool) currentSyncForUser(req syncRequest, latestPos types.Pagin
}
accountDataFilter := gomatrixserverlib.DefaultEventFilter() // TODO: use filter provided in req instead
res, err = rp.appendAccountData(res, req.device.UserID, req, latestPos.PDUPosition, &accountDataFilter)
res, err = rp.appendAccountData(res, req.device.UserID, req, latestPos.PDUPosition(), &accountDataFilter)
return
}
@ -187,7 +187,7 @@ func (rp *RequestPool) appendAccountData(
// Sync is not initial, get all account data since the latest sync
dataTypes, err := rp.db.GetAccountDataInRange(
req.ctx, userID,
types.StreamPosition(req.since.PDUPosition), types.StreamPosition(currentPos),
types.StreamPosition(req.since.PDUPosition()), types.StreamPosition(currentPos),
accountDataFilter,
)
if err != nil {

12
syncapi/sync/userstream.go
View file

@ -34,7 +34,7 @@ type UserStream struct {
// Closed when there is an update.
signalChannel chan struct{}
// The last sync position that there may have been an update for the user
pos types.PaginationToken
pos types.StreamingToken
// The last time when we had some listeners waiting
timeOfLastChannel time.Time
// The number of listeners waiting
@ -50,7 +50,7 @@ type UserStreamListener struct {
}
// NewUserStream creates a new user stream
func NewUserStream(userID string, currPos types.PaginationToken) *UserStream {
func NewUserStream(userID string, currPos types.StreamingToken) *UserStream {
return &UserStream{
UserID: userID,
timeOfLastChannel: time.Now(),
@ -83,7 +83,7 @@ func (s *UserStream) GetListener(ctx context.Context) UserStreamListener {
}
// Broadcast a new sync position for this user.
func (s *UserStream) Broadcast(pos types.PaginationToken) {
func (s *UserStream) Broadcast(pos types.StreamingToken) {
s.lock.Lock()
defer s.lock.Unlock()
@ -116,9 +116,9 @@ func (s *UserStream) TimeOfLastNonEmpty() time.Time {
return s.timeOfLastChannel
}
// GetStreamPosition returns last sync position which the UserStream was
// GetSyncPosition returns last sync position which the UserStream was
// notified about
func (s *UserStreamListener) GetSyncPosition() types.PaginationToken {
func (s *UserStreamListener) GetSyncPosition() types.StreamingToken {
s.userStream.lock.Lock()
defer s.userStream.lock.Unlock()
@ -130,7 +130,7 @@ func (s *UserStreamListener) GetSyncPosition() types.PaginationToken {
// sincePos specifies from which point we want to be notified about. If there
// has already been an update after sincePos we'll return a closed channel
// immediately.
func (s *UserStreamListener) GetNotifyChannel(sincePos types.PaginationToken) <-chan struct{} {
func (s *UserStreamListener) GetNotifyChannel(sincePos types.StreamingToken) <-chan struct{} {
s.userStream.lock.Lock()
defer s.userStream.lock.Unlock()

293
syncapi/types/types.go
View file

@ -27,19 +27,19 @@ import (
)
var (
// ErrInvalidPaginationTokenType is returned when an attempt at creating a
// new instance of PaginationToken with an invalid type (i.e. neither "s"
// ErrInvalidSyncTokenType is returned when an attempt at creating a
// new instance of SyncToken with an invalid type (i.e. neither "s"
// nor "t").
ErrInvalidPaginationTokenType = fmt.Errorf("Pagination token has an unknown prefix (should be either s or t)")
// ErrInvalidPaginationTokenLen is returned when the pagination token is an
ErrInvalidSyncTokenType = fmt.Errorf("Sync token has an unknown prefix (should be either s or t)")
// ErrInvalidSyncTokenLen is returned when the pagination token is an
// invalid length
ErrInvalidPaginationTokenLen = fmt.Errorf("Pagination token has an invalid length")
ErrInvalidSyncTokenLen = fmt.Errorf("Sync token has an invalid length")
)
// StreamPosition represents the offset in the sync stream a client is at.
type StreamPosition int64
// Same as gomatrixserverlib.Event but also has the PDU stream position for this event.
// StreamEvent is the same as gomatrixserverlib.Event but also has the PDU stream position for this event.
type StreamEvent struct {
gomatrixserverlib.HeaderedEvent
StreamPosition StreamPosition
@ -47,118 +47,201 @@ type StreamEvent struct {
ExcludeFromSync bool
}
// PaginationTokenType represents the type of a pagination token.
// SyncTokenType represents the type of a sync token.
// It can be either "s" (representing a position in the whole stream of events)
// or "t" (representing a position in a room's topology/depth).
type PaginationTokenType string
type SyncTokenType string
const (
// PaginationTokenTypeStream represents a position in the server's whole
// SyncTokenTypeStream represents a position in the server's whole
// stream of events
PaginationTokenTypeStream PaginationTokenType = "s"
// PaginationTokenTypeTopology represents a position in a room's topology.
PaginationTokenTypeTopology PaginationTokenType = "t"
SyncTokenTypeStream SyncTokenType = "s"
// SyncTokenTypeTopology represents a position in a room's topology.
SyncTokenTypeTopology SyncTokenType = "t"
)
// PaginationToken represents a pagination token, used for interactions with
// /sync or /messages, for example.
type PaginationToken struct {
//Position StreamPosition
Type PaginationTokenType
// For /sync, this is the PDU position. For /messages, this is the topological position (depth).
// TODO: Given how different the positions are depending on the token type, they should probably be renamed
// or use different structs altogether.
PDUPosition StreamPosition
// For /sync, this is the EDU position. For /messages, this is the stream (PDU) position.
// TODO: Given how different the positions are depending on the token type, they should probably be renamed
// or use different structs altogether.
EDUTypingPosition StreamPosition
type StreamingToken struct {
syncToken
}
// NewPaginationTokenFromString takes a string of the form "xyyyy..." where "x"
// represents the type of a pagination token and "yyyy..." the token itself, and
// parses it in order to create a new instance of PaginationToken. Returns an
// error if the token couldn't be parsed into an int64, or if the token type
// isn't a known type (returns ErrInvalidPaginationTokenType in the latter
// case).
func NewPaginationTokenFromString(s string) (token *PaginationToken, err error) {
if len(s) == 0 {
return nil, ErrInvalidPaginationTokenLen
}
func (t *StreamingToken) PDUPosition() StreamPosition {
return t.Positions[0]
}
func (t *StreamingToken) EDUPosition() StreamPosition {
return t.Positions[1]
}
token = new(PaginationToken)
var positions []string
switch t := PaginationTokenType(s[:1]); t {
case PaginationTokenTypeStream, PaginationTokenTypeTopology:
token.Type = t
positions = strings.Split(s[1:], "_")
default:
token.Type = PaginationTokenTypeStream
positions = strings.Split(s, "_")
}
// Try to get the PDU position.
if len(positions) >= 1 {
if pduPos, err := strconv.ParseInt(positions[0], 10, 64); err != nil {
return nil, err
} else if pduPos < 0 {
return nil, errors.New("negative PDU position not allowed")
} else {
token.PDUPosition = StreamPosition(pduPos)
// IsAfter returns true if ANY position in this token is greater than `other`.
func (t *StreamingToken) IsAfter(other StreamingToken) bool {
for i := range other.Positions {
if t.Positions[i] > other.Positions[i] {
return true
}
}
return false
}
// Try to get the typing position.
if len(positions) >= 2 {
if typPos, err := strconv.ParseInt(positions[1], 10, 64); err != nil {
return nil, err
} else if typPos < 0 {
return nil, errors.New("negative EDU typing position not allowed")
} else {
token.EDUTypingPosition = StreamPosition(typPos)
// WithUpdates returns a copy of the StreamingToken with updates applied from another StreamingToken.
// If the latter StreamingToken contains a field that is not 0, it is considered an update,
// and its value will replace the corresponding value in the StreamingToken on which WithUpdates is called.
func (t *StreamingToken) WithUpdates(other StreamingToken) (ret StreamingToken) {
ret.Type = t.Type
ret.Positions = make([]StreamPosition, len(t.Positions))
for i := range t.Positions {
ret.Positions[i] = t.Positions[i]
if other.Positions[i] == 0 {
continue
}
}
return
}
// NewPaginationTokenFromTypeAndPosition takes a PaginationTokenType and a
// StreamPosition and returns an instance of PaginationToken.
func NewPaginationTokenFromTypeAndPosition(
t PaginationTokenType, pdupos StreamPosition, typpos StreamPosition,
) (p *PaginationToken) {
return &PaginationToken{
Type: t,
PDUPosition: pdupos,
EDUTypingPosition: typpos,
}
}
// String translates a PaginationToken to a string of the "xyyyy..." (see
// NewPaginationToken to know what it represents).
func (p *PaginationToken) String() string {
return fmt.Sprintf("%s%d_%d", p.Type, p.PDUPosition, p.EDUTypingPosition)
}
// WithUpdates returns a copy of the PaginationToken with updates applied from another PaginationToken.
// If the latter PaginationToken contains a field that is not 0, it is considered an update,
// and its value will replace the corresponding value in the PaginationToken on which WithUpdates is called.
func (pt *PaginationToken) WithUpdates(other PaginationToken) PaginationToken {
ret := *pt
if other.PDUPosition != 0 {
ret.PDUPosition = other.PDUPosition
}
if other.EDUTypingPosition != 0 {
ret.EDUTypingPosition = other.EDUTypingPosition
ret.Positions[i] = other.Positions[i]
}
return ret
}
// IsAfter returns whether one PaginationToken refers to states newer than another PaginationToken.
func (sp *PaginationToken) IsAfter(other PaginationToken) bool {
return sp.PDUPosition > other.PDUPosition ||
sp.EDUTypingPosition > other.EDUTypingPosition
type TopologyToken struct {
syncToken
}
func (t *TopologyToken) Depth() StreamPosition {
return t.Positions[0]
}
func (t *TopologyToken) PDUPosition() StreamPosition {
return t.Positions[1]
}
func (t *TopologyToken) StreamToken() StreamingToken {
return NewStreamToken(t.PDUPosition(), 0)
}
func (t *TopologyToken) String() string {
return t.syncToken.String()
}
// Decrement the topology token to one event earlier.
func (t *TopologyToken) Decrement() {
depth := t.Positions[0]
pduPos := t.Positions[1]
if depth-1 <= 0 {
depth = 1
} else {
depth--
pduPos += 1000
}
// The lowest token value is 1, therefore we need to manually set it to that
// value if we're below it.
if depth < 1 {
depth = 1
}
t.Positions = []StreamPosition{
depth, pduPos,
}
}
// NewSyncTokenFromString takes a string of the form "xyyyy..." where "x"
// represents the type of a pagination token and "yyyy..." the token itself, and
// parses it in order to create a new instance of SyncToken. Returns an
// error if the token couldn't be parsed into an int64, or if the token type
// isn't a known type (returns ErrInvalidSyncTokenType in the latter
// case).
func newSyncTokenFromString(s string) (token *syncToken, err error) {
if len(s) == 0 {
return nil, ErrInvalidSyncTokenLen
}
token = new(syncToken)
var positions []string
switch t := SyncTokenType(s[:1]); t {
case SyncTokenTypeStream, SyncTokenTypeTopology:
token.Type = t
positions = strings.Split(s[1:], "_")
default:
return nil, ErrInvalidSyncTokenType
}
for _, pos := range positions {
if posInt, err := strconv.ParseInt(pos, 10, 64); err != nil {
return nil, err
} else if posInt < 0 {
return nil, errors.New("negative position not allowed")
} else {
token.Positions = append(token.Positions, StreamPosition(posInt))
}
}
return
}
// NewTopologyToken creates a new sync token for /messages
func NewTopologyToken(depth, streamPos StreamPosition) TopologyToken {
if depth < 0 {
depth = 1
}
return TopologyToken{
syncToken: syncToken{
Type: SyncTokenTypeTopology,
Positions: []StreamPosition{depth, streamPos},
},
}
}
func NewTopologyTokenFromString(tok string) (token TopologyToken, err error) {
t, err := newSyncTokenFromString(tok)
if err != nil {
return
}
if t.Type != SyncTokenTypeTopology {
err = fmt.Errorf("token %s is not a topology token", tok)
return
}
if len(t.Positions) != 2 {
err = fmt.Errorf("token %s wrong number of values, got %d want 2", tok, len(t.Positions))
return
}
return TopologyToken{
syncToken: *t,
}, nil
}
// NewStreamToken creates a new sync token for /sync
func NewStreamToken(pduPos, eduPos StreamPosition) StreamingToken {
return StreamingToken{
syncToken: syncToken{
Type: SyncTokenTypeStream,
Positions: []StreamPosition{pduPos, eduPos},
},
}
}
func NewStreamTokenFromString(tok string) (token StreamingToken, err error) {
t, err := newSyncTokenFromString(tok)
if err != nil {
return
}
if t.Type != SyncTokenTypeStream {
err = fmt.Errorf("token %s is not a streaming token", tok)
return
}
if len(t.Positions) != 2 {
err = fmt.Errorf("token %s wrong number of values, got %d want 2", tok, len(t.Positions))
return
}
return StreamingToken{
syncToken: *t,
}, nil
}
// syncToken represents a syncapi token, used for interactions with
// /sync or /messages, for example.
type syncToken struct {
Type SyncTokenType
// A list of stream positions, their meanings vary depending on the token type.
Positions []StreamPosition
}
// String translates a SyncToken to a string of the "xyyyy..." (see
// NewSyncToken to know what it represents).
func (p *syncToken) String() string {
posStr := make([]string, len(p.Positions))
for i := range p.Positions {
posStr[i] = strconv.FormatInt(int64(p.Positions[i]), 10)
}
return fmt.Sprintf("%s%s", p.Type, strings.Join(posStr, "_"))
}
// PrevEventRef represents a reference to a previous event in a state event upgrade
@ -185,7 +268,7 @@ type Response struct {
}
// NewResponse creates an empty response with initialised maps.
func NewResponse(token PaginationToken) *Response {
func NewResponse(token StreamingToken) *Response {
res := Response{
NextBatch: token.String(),
}
@ -202,14 +285,6 @@ func NewResponse(token PaginationToken) *Response {
res.AccountData.Events = make([]gomatrixserverlib.ClientEvent, 0)
res.Presence.Events = make([]gomatrixserverlib.ClientEvent, 0)
// Fill next_batch with a pagination token. Since this is a response to a sync request, we can assume
// we'll always return a stream token.
res.NextBatch = NewPaginationTokenFromTypeAndPosition(
PaginationTokenTypeStream,
StreamPosition(token.PDUPosition),
StreamPosition(token.EDUTypingPosition),
).String()
return &res
}

34
syncapi/types/types_test.go
View file

@ -2,26 +2,11 @@ package types
import "testing"
func TestNewPaginationTokenFromString(t *testing.T) {
shouldPass := map[string]PaginationToken{
"2": PaginationToken{
Type: PaginationTokenTypeStream,
PDUPosition: 2,
},
"s4": PaginationToken{
Type: PaginationTokenTypeStream,
PDUPosition: 4,
},
"s3_1": PaginationToken{
Type: PaginationTokenTypeStream,
PDUPosition: 3,
EDUTypingPosition: 1,
},
"t3_1_4": PaginationToken{
Type: PaginationTokenTypeTopology,
PDUPosition: 3,
EDUTypingPosition: 1,
},
func TestNewSyncTokenFromString(t *testing.T) {
shouldPass := map[string]syncToken{
"s4_0": NewStreamToken(4, 0).syncToken,
"s3_1": NewStreamToken(3, 1).syncToken,
"t3_1": NewTopologyToken(3, 1).syncToken,
}
shouldFail := []string{
@ -32,20 +17,21 @@ func TestNewPaginationTokenFromString(t *testing.T) {
"b",
"b-1",
"-4",
"2",
}
for test, expected := range shouldPass {
result, err := NewPaginationTokenFromString(test)
result, err := newSyncTokenFromString(test)
if err != nil {
t.Error(err)
}
if *result != expected {
t.Errorf("expected %v but got %v", expected.String(), result.String())
if result.String() != expected.String() {
t.Errorf("%s expected %v but got %v", test, expected.String(), result.String())
}
}
for _, test := range shouldFail {
if _, err := NewPaginationTokenFromString(test); err == nil {
if _, err := newSyncTokenFromString(test); err == nil {
t.Errorf("input '%v' should have errored but didn't", test)
}
}