1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// 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"
"github.com/Shopify/sarama"
"github.com/matrix-org/dendrite/currentstateserver/storage"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/syncapi/types"
"github.com/matrix-org/gomatrixserverlib"
log "github.com/sirupsen/logrus"
)
type OutputRoomEventConsumer struct {
rsConsumer *internal.ContinualConsumer
db storage.Database
}
func NewOutputRoomEventConsumer(topicName string, kafkaConsumer sarama.Consumer, store storage.Database) *OutputRoomEventConsumer {
consumer := &internal.ContinualConsumer{
Topic: topicName,
Consumer: kafkaConsumer,
PartitionStore: store,
}
s := &OutputRoomEventConsumer{
rsConsumer: consumer,
db: store,
}
consumer.ProcessMessage = s.onMessage
return s
}
func (c *OutputRoomEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
// Parse out the event JSON
var output api.OutputEvent
if err := json.Unmarshal(msg.Value, &output); err != nil {
// If the message was invalid, log it and move on to the next message in the stream
log.WithError(err).Errorf("roomserver output log: message parse failure")
return nil
}
switch output.Type {
case api.OutputTypeNewRoomEvent:
return c.onNewRoomEvent(context.TODO(), *output.NewRoomEvent)
case api.OutputTypeNewInviteEvent:
case api.OutputTypeRetireInviteEvent:
case api.OutputTypeRedactedEvent:
return c.onRedactEvent(context.Background(), *output.RedactedEvent)
default:
log.WithField("type", output.Type).Debug(
"roomserver output log: ignoring unknown output type",
)
}
return nil
}
func (c *OutputRoomEventConsumer) onNewRoomEvent(
ctx context.Context, msg api.OutputNewRoomEvent,
) error {
ev := msg.Event
addsStateEvents := msg.AddsState()
ev, err := c.updateStateEvent(ev)
if err != nil {
return err
}
for i := range addsStateEvents {
addsStateEvents[i], err = c.updateStateEvent(addsStateEvents[i])
if err != nil {
return err
}
}
err = c.db.StoreStateEvents(
ctx,
addsStateEvents,
msg.RemovesStateEventIDs,
)
if err != nil {
// panic rather than continue with an inconsistent database
log.WithFields(log.Fields{
"event": string(ev.JSON()),
log.ErrorKey: err,
"add": msg.AddsStateEventIDs,
"del": msg.RemovesStateEventIDs,
}).Panicf("roomserver output log: write event failure")
}
return nil
}
func (c *OutputRoomEventConsumer) onRedactEvent(
ctx context.Context, msg api.OutputRedactedEvent,
) error {
return c.db.RedactEvent(ctx, msg.RedactedEventID, msg.RedactedBecause)
}
// Start consuming from room servers
func (c *OutputRoomEventConsumer) Start() error {
return c.rsConsumer.Start()
}
func (c *OutputRoomEventConsumer) updateStateEvent(event gomatrixserverlib.HeaderedEvent) (gomatrixserverlib.HeaderedEvent, error) {
var stateKey string
if event.StateKey() == nil {
stateKey = ""
} else {
stateKey = *event.StateKey()
}
prevEvent, err := c.db.GetStateEvent(
context.TODO(), event.RoomID(), event.Type(), stateKey,
)
if err != nil {
return event, err
}
if prevEvent == nil {
return event, nil
}
prev := types.PrevEventRef{
PrevContent: prevEvent.Content(),
ReplacesState: prevEvent.EventID(),
PrevSender: prevEvent.Sender(),
}
event.Event, err = event.SetUnsigned(prev)
return event, err
}
|
