mirror of
https://github.com/matrix-org/dendrite.git
synced 2026-01-01 11:13:12 -06:00
325 lines
9.4 KiB
Go
325 lines
9.4 KiB
Go
// Copyright 2017 Vector Creations Ltd
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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 input contains the code processes new room events
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package input
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import (
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"context"
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"encoding/json"
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"errors"
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"sync"
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"time"
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"github.com/Arceliar/phony"
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"github.com/getsentry/sentry-go"
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fedapi "github.com/matrix-org/dendrite/federationapi/api"
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"github.com/matrix-org/dendrite/roomserver/acls"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/roomserver/internal/query"
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"github.com/matrix-org/dendrite/roomserver/storage"
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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/gomatrixserverlib"
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"github.com/nats-io/nats.go"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/sirupsen/logrus"
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log "github.com/sirupsen/logrus"
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"github.com/tidwall/gjson"
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)
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var keyContentFields = map[string]string{
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"m.room.join_rules": "join_rule",
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"m.room.history_visibility": "history_visibility",
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"m.room.member": "membership",
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}
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type Inputer struct {
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Cfg *config.RoomServer
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ProcessContext *process.ProcessContext
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DB storage.Database
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NATSClient *nats.Conn
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JetStream nats.JetStreamContext
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Durable nats.SubOpt
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ServerName gomatrixserverlib.ServerName
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FSAPI fedapi.FederationInternalAPI
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KeyRing gomatrixserverlib.JSONVerifier
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ACLs *acls.ServerACLs
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InputRoomEventTopic string
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OutputRoomEventTopic string
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workers sync.Map // room ID -> *worker
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Queryer *query.Queryer
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}
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type worker struct {
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phony.Inbox
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r *Inputer
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roomID string
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subscription *nats.Subscription
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}
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func (r *Inputer) startWorkerForRoom(roomID string) {
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v, loaded := r.workers.LoadOrStore(roomID, &worker{
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r: r,
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roomID: roomID,
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})
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w := v.(*worker)
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if !loaded {
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consumer := r.Cfg.Matrix.JetStream.Prefixed("RoomInput" + jetstream.Tokenise(w.roomID))
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subject := jetstream.InputRoomEventSubj(w.roomID)
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if _, err := w.r.JetStream.AddConsumer(
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r.Cfg.Matrix.JetStream.Prefixed(jetstream.InputRoomEvent),
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&nats.ConsumerConfig{
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Durable: consumer,
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AckPolicy: nats.AckAllPolicy,
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DeliverPolicy: nats.DeliverAllPolicy,
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FilterSubject: subject,
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AckWait: MaximumMissingProcessingTime + (time.Second * 10),
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},
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); err != nil {
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logrus.WithError(err).Errorf("Failed to create consumer for room %q", w.roomID)
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return
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}
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sub, err := w.r.JetStream.PullSubscribe(
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subject, consumer,
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nats.ManualAck(),
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nats.DeliverAll(),
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nats.AckWait(MaximumMissingProcessingTime+(time.Second*10)),
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nats.Bind(r.InputRoomEventTopic, consumer),
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)
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if err != nil {
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logrus.WithError(err).Errorf("Failed to subscribe to stream for room %q", w.roomID)
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return
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}
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logrus.Infof("Stream for room %q active", w.roomID)
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w.subscription = sub
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w.Act(nil, w.next)
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}
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}
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// onMessage is called when a new event arrives in the roomserver input stream.
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func (r *Inputer) Start() error {
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_, err := r.JetStream.Subscribe(
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"", // don't supply a subject because we're using BindStream
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func(m *nats.Msg) {
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roomID := m.Header.Get(jetstream.RoomID)
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r.startWorkerForRoom(roomID)
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},
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nats.DeliverAll(),
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nats.AckNone(),
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nats.BindStream(r.InputRoomEventTopic),
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)
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return err
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}
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func (w *worker) next() {
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ctx, cancel := context.WithTimeout(w.r.ProcessContext.Context(), time.Second*30)
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defer cancel()
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msgs, err := w.subscription.Fetch(1, nats.Context(ctx))
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switch err {
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case nil:
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if len(msgs) != 1 {
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return
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}
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defer w.Act(nil, w.next)
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case context.DeadlineExceeded:
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logrus.Infof("Stream for room %q inactive", w.roomID)
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if err = w.subscription.Unsubscribe(); err != nil {
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logrus.WithError(err).Errorf("Failed to unsubscribe to stream for room %q", w.roomID)
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}
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w.r.workers.Delete(w.roomID)
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return
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case nats.ErrTimeout:
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w.Act(nil, w.next)
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return
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default:
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logrus.WithError(err).Errorf("Failed to get next stream message for room %q", w.roomID)
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if err = w.subscription.Unsubscribe(); err != nil {
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logrus.WithError(err).Errorf("Failed to unsubscribe to stream for room %q", w.roomID)
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}
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w.r.workers.Delete(w.roomID)
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return
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}
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msg := msgs[0]
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var inputRoomEvent api.InputRoomEvent
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if err = json.Unmarshal(msg.Data, &inputRoomEvent); err != nil {
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_ = msg.Term()
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return
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}
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roomserverInputBackpressure.With(prometheus.Labels{"room_id": w.roomID}).Inc()
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defer roomserverInputBackpressure.With(prometheus.Labels{"room_id": w.roomID}).Dec()
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var errString string
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if err = w.r.processRoomEvent(w.r.ProcessContext.Context(), &inputRoomEvent); err != nil {
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if !errors.Is(err, context.DeadlineExceeded) && !errors.Is(err, context.Canceled) {
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sentry.CaptureException(err)
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}
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logrus.WithError(err).WithFields(logrus.Fields{
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"room_id": w.roomID,
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"event_id": inputRoomEvent.Event.EventID(),
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"type": inputRoomEvent.Event.Type(),
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}).Warn("Roomserver failed to process async event")
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_ = msg.Term()
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errString = err.Error()
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} else {
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_ = msg.Ack()
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}
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if replyTo := msg.Header.Get("sync"); replyTo != "" {
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if err = w.r.NATSClient.Publish(replyTo, []byte(errString)); err != nil {
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logrus.WithError(err).WithFields(logrus.Fields{
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"room_id": w.roomID,
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"event_id": inputRoomEvent.Event.EventID(),
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"type": inputRoomEvent.Event.Type(),
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}).Warn("Roomserver failed to respond for sync event")
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}
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}
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}
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// InputRoomEvents implements api.RoomserverInternalAPI
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func (r *Inputer) InputRoomEvents(
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ctx context.Context,
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request *api.InputRoomEventsRequest,
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response *api.InputRoomEventsResponse,
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) {
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var replyTo string
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var replySub *nats.Subscription
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if !request.Asynchronous {
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var err error
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replyTo = nats.NewInbox()
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replySub, err = r.NATSClient.SubscribeSync(replyTo)
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if err != nil {
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response.ErrMsg = err.Error()
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return
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}
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}
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var err error
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for _, e := range request.InputRoomEvents {
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roomID := e.Event.RoomID()
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subj := jetstream.InputRoomEventSubj(roomID)
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msg := &nats.Msg{
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Subject: subj,
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Header: nats.Header{},
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Reply: replyTo,
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}
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msg.Header.Set("room_id", roomID)
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if replyTo != "" {
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msg.Header.Set("sync", replyTo)
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}
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msg.Data, err = json.Marshal(e)
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if err != nil {
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response.ErrMsg = err.Error()
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return
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}
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if _, err = r.JetStream.PublishMsg(msg); err != nil {
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logrus.WithError(err).WithFields(logrus.Fields{
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"room_id": roomID,
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"event_id": e.Event.EventID(),
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"subj": subj,
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}).Error("Roomserver failed to queue async event")
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return
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}
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}
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if request.Asynchronous || replySub == nil {
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return
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}
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defer replySub.Drain() // nolint:errcheck
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for i := 0; i < len(request.InputRoomEvents); i++ {
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msg, err := replySub.NextMsgWithContext(ctx)
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if err != nil {
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response.ErrMsg = err.Error()
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return
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}
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if len(msg.Data) > 0 {
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response.ErrMsg = string(msg.Data)
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return
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}
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}
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}
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// WriteOutputEvents implements OutputRoomEventWriter
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func (r *Inputer) WriteOutputEvents(roomID string, updates []api.OutputEvent) error {
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var err error
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for _, update := range updates {
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msg := &nats.Msg{
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Subject: r.OutputRoomEventTopic,
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Header: nats.Header{},
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}
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msg.Header.Set(jetstream.RoomID, roomID)
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msg.Data, err = json.Marshal(update)
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if err != nil {
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return err
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}
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logger := log.WithFields(log.Fields{
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"room_id": roomID,
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"type": update.Type,
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})
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if update.NewRoomEvent != nil {
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eventType := update.NewRoomEvent.Event.Type()
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logger = logger.WithFields(log.Fields{
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"event_type": eventType,
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"event_id": update.NewRoomEvent.Event.EventID(),
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"adds_state": len(update.NewRoomEvent.AddsStateEventIDs),
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"removes_state": len(update.NewRoomEvent.RemovesStateEventIDs),
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"send_as_server": update.NewRoomEvent.SendAsServer,
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"sender": update.NewRoomEvent.Event.Sender(),
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})
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if update.NewRoomEvent.Event.StateKey() != nil {
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logger = logger.WithField("state_key", *update.NewRoomEvent.Event.StateKey())
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}
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contentKey := keyContentFields[eventType]
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if contentKey != "" {
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value := gjson.GetBytes(update.NewRoomEvent.Event.Content(), contentKey)
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if value.Exists() {
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logger = logger.WithField("content_value", value.String())
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}
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}
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if eventType == "m.room.server_acl" && update.NewRoomEvent.Event.StateKeyEquals("") {
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ev := update.NewRoomEvent.Event.Unwrap()
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defer r.ACLs.OnServerACLUpdate(ev)
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}
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}
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logger.Tracef("Producing to topic '%s'", r.OutputRoomEventTopic)
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if _, err := r.JetStream.PublishMsg(msg); err != nil {
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logger.WithError(err).Errorf("Failed to produce to topic '%s': %s", r.OutputRoomEventTopic, err)
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return err
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}
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}
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return nil
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}
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func init() {
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prometheus.MustRegister(roomserverInputBackpressure)
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}
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var roomserverInputBackpressure = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: "dendrite",
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Subsystem: "roomserver",
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Name: "input_backpressure",
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Help: "How many events are queued for input for a given room",
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},
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[]string{"room_id"},
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)
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