mirror of
https://github.com/matrix-org/dendrite
synced 2024-09-07 19:55:39 +02:00
This should transactional snapshot isolation for `/sync` etc requests. For now we don't use repeatable read due to some odd test failures with invites.
174 lines
5.6 KiB
Go
174 lines
5.6 KiB
Go
// Copyright 2022 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consumers
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import (
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"context"
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"strconv"
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"github.com/matrix-org/dendrite/setup/config"
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"github.com/matrix-org/dendrite/setup/jetstream"
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"github.com/matrix-org/dendrite/setup/process"
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"github.com/matrix-org/dendrite/syncapi/notifier"
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"github.com/matrix-org/dendrite/syncapi/storage"
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"github.com/matrix-org/dendrite/syncapi/streams"
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"github.com/matrix-org/dendrite/syncapi/types"
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"github.com/matrix-org/dendrite/userapi/api"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/nats-io/nats.go"
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"github.com/sirupsen/logrus"
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)
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// OutputTypingEventConsumer consumes events that originated in the EDU server.
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type PresenceConsumer struct {
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ctx context.Context
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jetstream nats.JetStreamContext
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nats *nats.Conn
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durable string
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requestTopic string
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presenceTopic string
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db storage.Database
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stream streams.StreamProvider
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notifier *notifier.Notifier
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deviceAPI api.SyncUserAPI
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cfg *config.SyncAPI
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}
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// NewPresenceConsumer creates a new PresenceConsumer.
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// Call Start() to begin consuming events.
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func NewPresenceConsumer(
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process *process.ProcessContext,
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cfg *config.SyncAPI,
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js nats.JetStreamContext,
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nats *nats.Conn,
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db storage.Database,
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notifier *notifier.Notifier,
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stream streams.StreamProvider,
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deviceAPI api.SyncUserAPI,
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) *PresenceConsumer {
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return &PresenceConsumer{
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ctx: process.Context(),
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nats: nats,
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jetstream: js,
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durable: cfg.Matrix.JetStream.Durable("SyncAPIPresenceConsumer"),
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presenceTopic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputPresenceEvent),
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requestTopic: cfg.Matrix.JetStream.Prefixed(jetstream.RequestPresence),
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db: db,
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notifier: notifier,
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stream: stream,
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deviceAPI: deviceAPI,
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cfg: cfg,
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}
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}
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// Start consuming typing events.
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func (s *PresenceConsumer) Start() error {
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// Normal NATS subscription, used by Request/Reply
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_, err := s.nats.Subscribe(s.requestTopic, func(msg *nats.Msg) {
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userID := msg.Header.Get(jetstream.UserID)
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presence, err := s.db.GetPresence(context.Background(), userID)
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m := &nats.Msg{
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Header: nats.Header{},
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}
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if err != nil {
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m.Header.Set("error", err.Error())
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if err = msg.RespondMsg(m); err != nil {
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logrus.WithError(err).Error("Unable to respond to messages")
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}
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return
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}
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if presence == nil {
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presence = &types.PresenceInternal{
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UserID: userID,
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}
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}
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deviceRes := api.QueryDevicesResponse{}
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if err = s.deviceAPI.QueryDevices(s.ctx, &api.QueryDevicesRequest{UserID: userID}, &deviceRes); err != nil {
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m.Header.Set("error", err.Error())
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if err = msg.RespondMsg(m); err != nil {
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logrus.WithError(err).Error("Unable to respond to messages")
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}
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return
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}
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for i := range deviceRes.Devices {
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if int64(presence.LastActiveTS) < deviceRes.Devices[i].LastSeenTS {
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presence.LastActiveTS = gomatrixserverlib.Timestamp(deviceRes.Devices[i].LastSeenTS)
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}
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}
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m.Header.Set(jetstream.UserID, presence.UserID)
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m.Header.Set("presence", presence.ClientFields.Presence)
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if presence.ClientFields.StatusMsg != nil {
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m.Header.Set("status_msg", *presence.ClientFields.StatusMsg)
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}
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m.Header.Set("last_active_ts", strconv.Itoa(int(presence.LastActiveTS)))
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if err = msg.RespondMsg(m); err != nil {
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logrus.WithError(err).Error("Unable to respond to messages")
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return
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}
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})
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if err != nil {
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return err
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}
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if !s.cfg.Matrix.Presence.EnableInbound && !s.cfg.Matrix.Presence.EnableOutbound {
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return nil
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}
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return jetstream.JetStreamConsumer(
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s.ctx, s.jetstream, s.presenceTopic, s.durable, 1, s.onMessage,
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nats.DeliverAll(), nats.ManualAck(), nats.HeadersOnly(),
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)
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}
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func (s *PresenceConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
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msg := msgs[0] // Guaranteed to exist if onMessage is called
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userID := msg.Header.Get(jetstream.UserID)
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presence := msg.Header.Get("presence")
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timestamp := msg.Header.Get("last_active_ts")
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fromSync, _ := strconv.ParseBool(msg.Header.Get("from_sync"))
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logrus.Tracef("syncAPI received presence event: %+v", msg.Header)
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if fromSync { // do not process local presence changes; we already did this synchronously.
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return true
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}
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ts, err := strconv.ParseUint(timestamp, 10, 64)
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if err != nil {
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return true
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}
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var statusMsg *string = nil
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if data, ok := msg.Header["status_msg"]; ok && len(data) > 0 {
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newMsg := msg.Header.Get("status_msg")
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statusMsg = &newMsg
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}
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// already checked, so no need to check error
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p, _ := types.PresenceFromString(presence)
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s.EmitPresence(ctx, userID, p, statusMsg, gomatrixserverlib.Timestamp(ts), fromSync)
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return true
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}
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func (s *PresenceConsumer) EmitPresence(ctx context.Context, userID string, presence types.Presence, statusMsg *string, ts gomatrixserverlib.Timestamp, fromSync bool) {
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pos, err := s.db.UpdatePresence(ctx, userID, presence, statusMsg, ts, fromSync)
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if err != nil {
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logrus.WithError(err).WithField("user", userID).WithField("presence", presence).Warn("failed to updated presence for user")
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return
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}
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s.stream.Advance(pos)
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s.notifier.OnNewPresence(types.StreamingToken{PresencePosition: pos}, userID)
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}
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