135 lines
4.3 KiB
Go
135 lines
4.3 KiB
Go
// Copyright 2020 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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"encoding/json"
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"sync"
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"github.com/Shopify/sarama"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/keyserver/api"
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roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
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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/types"
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"github.com/matrix-org/gomatrixserverlib"
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log "github.com/sirupsen/logrus"
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)
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// OutputKeyChangeEventConsumer consumes events that originated in the key server.
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type OutputKeyChangeEventConsumer struct {
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keyChangeConsumer *internal.ContinualConsumer
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db storage.Database
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notifier *notifier.Notifier
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stream types.PartitionedStreamProvider
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serverName gomatrixserverlib.ServerName // our server name
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rsAPI roomserverAPI.RoomserverInternalAPI
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keyAPI api.KeyInternalAPI
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partitionToOffset map[int32]int64
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partitionToOffsetMu sync.Mutex
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}
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// NewOutputKeyChangeEventConsumer creates a new OutputKeyChangeEventConsumer.
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// Call Start() to begin consuming from the key server.
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func NewOutputKeyChangeEventConsumer(
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process *process.ProcessContext,
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serverName gomatrixserverlib.ServerName,
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topic string,
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kafkaConsumer sarama.Consumer,
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keyAPI api.KeyInternalAPI,
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rsAPI roomserverAPI.RoomserverInternalAPI,
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store storage.Database,
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notifier *notifier.Notifier,
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stream types.PartitionedStreamProvider,
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) *OutputKeyChangeEventConsumer {
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consumer := internal.ContinualConsumer{
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Process: process,
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ComponentName: "syncapi/keychange",
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Topic: topic,
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Consumer: kafkaConsumer,
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PartitionStore: store,
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}
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s := &OutputKeyChangeEventConsumer{
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keyChangeConsumer: &consumer,
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db: store,
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serverName: serverName,
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keyAPI: keyAPI,
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rsAPI: rsAPI,
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partitionToOffset: make(map[int32]int64),
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partitionToOffsetMu: sync.Mutex{},
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notifier: notifier,
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stream: stream,
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}
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consumer.ProcessMessage = s.onMessage
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return s
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}
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// Start consuming from the key server
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func (s *OutputKeyChangeEventConsumer) Start() error {
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offsets, err := s.keyChangeConsumer.StartOffsets()
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s.partitionToOffsetMu.Lock()
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for _, o := range offsets {
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s.partitionToOffset[o.Partition] = o.Offset
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}
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s.partitionToOffsetMu.Unlock()
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return err
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}
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func (s *OutputKeyChangeEventConsumer) updateOffset(msg *sarama.ConsumerMessage) {
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s.partitionToOffsetMu.Lock()
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defer s.partitionToOffsetMu.Unlock()
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s.partitionToOffset[msg.Partition] = msg.Offset
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}
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func (s *OutputKeyChangeEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
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defer s.updateOffset(msg)
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var output api.DeviceMessage
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if err := json.Unmarshal(msg.Value, &output); err != nil {
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// If the message was invalid, log it and move on to the next message in the stream
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log.WithError(err).Error("syncapi: failed to unmarshal key change event from key server")
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return err
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}
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// work out who we need to notify about the new key
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var queryRes roomserverAPI.QuerySharedUsersResponse
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err := s.rsAPI.QuerySharedUsers(context.Background(), &roomserverAPI.QuerySharedUsersRequest{
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UserID: output.UserID,
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}, &queryRes)
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if err != nil {
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log.WithError(err).Error("syncapi: failed to QuerySharedUsers for key change event from key server")
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return err
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}
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// make sure we get our own key updates too!
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queryRes.UserIDsToCount[output.UserID] = 1
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posUpdate := types.LogPosition{
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Offset: msg.Offset,
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Partition: msg.Partition,
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}
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s.stream.Advance(posUpdate)
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for userID := range queryRes.UserIDsToCount {
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s.notifier.OnNewKeyChange(types.StreamingToken{DeviceListPosition: posUpdate}, userID, output.UserID)
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}
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return nil
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}
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