mirror of
https://github.com/hoernschen/dendrite.git
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111 lines
3.6 KiB
Go
111 lines
3.6 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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// OutputNotificationDataConsumer consumes events that originated in
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// the Push server.
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type OutputNotificationDataConsumer struct {
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ctx context.Context
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jetstream nats.JetStreamContext
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durable string
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topic string
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db storage.Database
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notifier *notifier.Notifier
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stream types.StreamProvider
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}
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// NewOutputNotificationDataConsumer creates a new consumer. Call
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// Start() to begin consuming.
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func NewOutputNotificationDataConsumer(
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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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) *OutputNotificationDataConsumer {
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s := &OutputNotificationDataConsumer{
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ctx: process.Context(),
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jetstream: js,
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durable: cfg.Matrix.JetStream.Durable("SyncAPINotificationDataConsumer"),
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topic: cfg.Matrix.JetStream.Prefixed(jetstream.OutputNotificationData),
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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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return s
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}
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// Start starts consumption.
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func (s *OutputNotificationDataConsumer) Start() error {
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return jetstream.JetStreamConsumer(
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s.ctx, s.jetstream, s.topic, s.durable, 1,
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s.onMessage, nats.DeliverAll(), nats.ManualAck(),
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)
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}
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// onMessage is called when the Sync server receives a new event from
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// the push server. It is not safe for this function to be called from
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// multiple goroutines, or else the sync stream position may race and
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// be incorrectly calculated.
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func (s *OutputNotificationDataConsumer) onMessage(ctx context.Context, msgs []*nats.Msg) bool {
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msg := msgs[0] // Guaranteed to exist if onMessage is called
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userID := string(msg.Header.Get(jetstream.UserID))
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// Parse out the event JSON
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var data eventutil.NotificationData
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if err := json.Unmarshal(msg.Data, &data); err != nil {
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sentry.CaptureException(err)
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log.WithField("user_id", userID).WithError(err).Error("user API consumer: message parse failure")
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return true
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}
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streamPos, err := s.db.UpsertRoomUnreadNotificationCounts(ctx, userID, data.RoomID, data.UnreadNotificationCount, data.UnreadHighlightCount)
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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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"user_id": userID,
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"room_id": data.RoomID,
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}).WithError(err).Error("Could not save notification counts")
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return false
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}
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s.stream.Advance(streamPos)
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s.notifier.OnNewNotificationData(userID, types.StreamingToken{NotificationDataPosition: streamPos})
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log.WithFields(log.Fields{
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"user_id": userID,
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"room_id": data.RoomID,
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"streamPos": streamPos,
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}).Trace("Received notification data from user API")
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return true
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}
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