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// Copyright 2017 Vector Creations Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package consumers
import (
"context"
"encoding/json"
"strings"
"time"
"github.com/getsentry/sentry-go"
"github.com/matrix-org/gomatrixserverlib"
"github.com/nats-io/nats.go"
"github.com/sirupsen/logrus"
log "github.com/sirupsen/logrus"
"github.com/tidwall/gjson"
"github.com/matrix-org/dendrite/internal/eventutil"
"github.com/matrix-org/dendrite/internal/fulltext"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/setup/jetstream"
"github.com/matrix-org/dendrite/setup/process"
"github.com/matrix-org/dendrite/syncapi/notifier"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/streams"
"github.com/matrix-org/dendrite/syncapi/types"
)
// OutputClientDataConsumer consumes events that originated in the client API server.
type OutputClientDataConsumer struct {
ctx context.Context
jetstream nats.JetStreamContext
nats *nats.Conn
durable string
topic string
topicReIndex string
db storage.Database
stream streams.StreamProvider
notifier *notifier.Notifier
serverName gomatrixserverlib.ServerName
fts fulltext.Indexer
cfg *config.SyncAPI
}
// NewOutputClientDataConsumer creates a new OutputClientData consumer. Call Start() to begin consuming from room servers.
func NewOutputClientDataConsumer(
process *process.ProcessContext,
cfg *config.SyncAPI,
js nats.JetStreamContext,
nats *nats.Conn,
store storage.Database,
notifier *notifier.Notifier,
stream streams.StreamProvider,
fts *fulltext.Search,
) *OutputClientDataConsumer {
return &OutputClientDataConsumer{
ctx: process.Context(),
jetstream: js,
topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputClientData),
topicReIndex: cfg.Matrix.JetStream.Prefixed(jetstream.InputFulltextReindex),
durable: cfg.Matrix.JetStream.Durable("SyncAPIAccountDataConsumer"),
nats: nats,
db: store,
notifier: notifier,
stream: stream,
serverName: cfg.Matrix.ServerName,
fts: fts,
cfg: cfg,
}
}
// Start consuming from room servers
func (s *OutputClientDataConsumer) Start() error {
_, err := s.nats.Subscribe(s.topicReIndex, func(msg *nats.Msg) {
if err := msg.Ack(); err != nil {
return
}
if !s.cfg.Fulltext.Enabled {
logrus.Warn("Fulltext indexing is disabled")
return
}
ctx := context.Background()
logrus.Infof("Starting to index events")
var offset int
start := time.Now()
count := 0
var id int64 = 0
for {
evs, err := s.db.ReIndex(ctx, 1000, id)
if err != nil {
logrus.WithError(err).Errorf("unable to get events to index")
return
}
if len(evs) == 0 {
break
}
logrus.Debugf("Indexing %d events", len(evs))
elements := make([]fulltext.IndexElement, 0, len(evs))
for streamPos, ev := range evs {
id = streamPos
e := fulltext.IndexElement{
EventID: ev.EventID(),
RoomID: ev.RoomID(),
StreamPosition: streamPos,
}
e.SetContentType(ev.Type())
switch ev.Type() {
case "m.room.message":
e.Content = gjson.GetBytes(ev.Content(), "body").String()
case gomatrixserverlib.MRoomName:
e.Content = gjson.GetBytes(ev.Content(), "name").String()
case gomatrixserverlib.MRoomTopic:
e.Content = gjson.GetBytes(ev.Content(), "topic").String()
default:
continue
}
if strings.TrimSpace(e.Content) == "" {
continue
}
elements = append(elements, e)
}
if err = s.fts.Index(elements...); err != nil {
logrus.WithError(err).Error("unable to index events")
continue
}
offset += len(evs)
count += len(elements)
}
logrus.Infof("Indexed %d events in %v", count, time.Since(start))
})
if err != nil {
return err
}
return jetstream.JetStreamConsumer(
s.ctx, s.jetstream, s.topic, s.durable, 1,
s.onMessage, nats.DeliverAll(), nats.ManualAck(),
)
}
// onMessage is called when the sync server receives a new event from the client API server output log.
// It is not safe for this function to be called from multiple goroutines, or else the
// sync stream position may race and be incorrectly calculated.
func (s *OutputClientDataConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
msg := msgs[0] // Guaranteed to exist if onMessage is called
// Parse out the event JSON
userID := msg.Header.Get(jetstream.UserID)
var output eventutil.AccountData
if err := json.Unmarshal(msg.Data, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("client API server output log: message parse failure")
sentry.CaptureException(err)
return true
}
log.WithFields(log.Fields{
"type": output.Type,
"room_id": output.RoomID,
}).Debug("Received data from client API server")
streamPos, err := s.db.UpsertAccountData(
s.ctx, userID, output.RoomID, output.Type,
)
if err != nil {
sentry.CaptureException(err)
log.WithFields(log.Fields{
"type": output.Type,
"room_id": output.RoomID,
log.ErrorKey: err,
}).Errorf("could not save account data")
return false
}
if output.IgnoredUsers != nil {
if err := s.db.UpdateIgnoresForUser(ctx, userID, output.IgnoredUsers); err != nil {
log.WithError(err).WithFields(logrus.Fields{
"user_id": userID,
}).Errorf("Failed to update ignored users")
sentry.CaptureException(err)
}
}
s.stream.Advance(streamPos)
s.notifier.OnNewAccountData(userID, types.StreamingToken{AccountDataPosition: streamPos})
return true
}
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