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// 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/matrix-org/dendrite/syncapi/types"
"github.com/Shopify/sarama"
"github.com/matrix-org/dendrite/eduserver/api"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/dendrite/syncapi/storage"
"github.com/matrix-org/dendrite/syncapi/sync"
log "github.com/sirupsen/logrus"
)
// OutputReceiptEventConsumer consumes events that originated in the EDU server.
type OutputReceiptEventConsumer struct {
receiptConsumer *internal.ContinualConsumer
db storage.Database
notifier *sync.Notifier
}
// NewOutputReceiptEventConsumer creates a new OutputReceiptEventConsumer.
// Call Start() to begin consuming from the EDU server.
func NewOutputReceiptEventConsumer(
cfg *config.SyncAPI,
kafkaConsumer sarama.Consumer,
n *sync.Notifier,
store storage.Database,
) *OutputReceiptEventConsumer {
consumer := internal.ContinualConsumer{
ComponentName: "syncapi/eduserver/receipt",
Topic: cfg.Matrix.Kafka.TopicFor(config.TopicOutputReceiptEvent),
Consumer: kafkaConsumer,
PartitionStore: store,
}
s := &OutputReceiptEventConsumer{
receiptConsumer: &consumer,
db: store,
notifier: n,
}
consumer.ProcessMessage = s.onMessage
return s
}
// Start consuming from EDU api
func (s *OutputReceiptEventConsumer) Start() error {
return s.receiptConsumer.Start()
}
func (s *OutputReceiptEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
var output api.OutputReceiptEvent
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("EDU server output log: message parse failure")
return nil
}
streamPos, err := s.db.StoreReceipt(
context.TODO(),
output.RoomID,
output.Type,
output.UserID,
output.EventID,
output.Timestamp,
)
if err != nil {
return err
}
// update stream position
s.notifier.OnNewReceipt(types.StreamingToken{ReceiptPosition: streamPos})
return nil
}
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