mirror of
https://github.com/hoernschen/dendrite.git
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105 lines
3.4 KiB
Go
105 lines
3.4 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 consumers
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import (
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"context"
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"encoding/json"
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"github.com/getsentry/sentry-go"
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"github.com/matrix-org/dendrite/internal/eventutil"
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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/types"
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"github.com/nats-io/nats.go"
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log "github.com/sirupsen/logrus"
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)
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// OutputClientDataConsumer consumes events that originated in the client API server.
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type OutputClientDataConsumer struct {
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ctx context.Context
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jetstream nats.JetStreamContext
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topic string
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db storage.Database
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stream types.StreamProvider
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notifier *notifier.Notifier
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}
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// NewOutputClientDataConsumer creates a new OutputClientData consumer. Call Start() to begin consuming from room servers.
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func NewOutputClientDataConsumer(
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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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store storage.Database,
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notifier *notifier.Notifier,
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stream types.StreamProvider,
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) *OutputClientDataConsumer {
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return &OutputClientDataConsumer{
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ctx: process.Context(),
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jetstream: js,
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topic: cfg.Matrix.JetStream.TopicFor(jetstream.OutputClientData),
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db: store,
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notifier: notifier,
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stream: stream,
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}
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}
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// Start consuming from room servers
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func (s *OutputClientDataConsumer) Start() error {
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_, err := s.jetstream.Subscribe(s.topic, s.onMessage)
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return err
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}
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// onMessage is called when the sync server receives a new event from the client API server output log.
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// It is not safe for this function to be called from multiple goroutines, or else the
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// sync stream position may race and be incorrectly calculated.
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func (s *OutputClientDataConsumer) onMessage(msg *nats.Msg) {
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jetstream.WithJetStreamMessage(msg, func(msg *nats.Msg) bool {
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// Parse out the event JSON
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userID := msg.Header.Get(jetstream.UserID)
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var output eventutil.AccountData
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if err := json.Unmarshal(msg.Data, &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).Errorf("client API server output log: message parse failure")
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sentry.CaptureException(err)
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return true
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}
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log.WithFields(log.Fields{
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"type": output.Type,
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"room_id": output.RoomID,
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}).Info("received data from client API server")
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streamPos, err := s.db.UpsertAccountData(
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s.ctx, userID, output.RoomID, output.Type,
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)
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if err != nil {
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sentry.CaptureException(err)
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log.WithFields(log.Fields{
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"type": output.Type,
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"room_id": output.RoomID,
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log.ErrorKey: err,
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}).Panicf("could not save account data")
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}
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s.stream.Advance(streamPos)
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s.notifier.OnNewAccountData(userID, types.StreamingToken{AccountDataPosition: streamPos})
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return true
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})
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}
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