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// Copyright 2017 Vector Creations Ltd
//
// 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 input contains the code processes new room events
package input
import (
"context"
"encoding/json"
"sync"
"github.com/Shopify/sarama"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/gomatrixserverlib"
log "github.com/sirupsen/logrus"
)
type Inputer struct {
DB storage.Database
Producer sarama.SyncProducer
ServerName gomatrixserverlib.ServerName
OutputRoomEventTopic string
mutexes sync.Map // room ID -> *sync.Mutex, protects calls to processRoomEvent
}
// WriteOutputEvents implements OutputRoomEventWriter
func (r *Inputer) WriteOutputEvents(roomID string, updates []api.OutputEvent) error {
messages := make([]*sarama.ProducerMessage, len(updates))
for i := range updates {
value, err := json.Marshal(updates[i])
if err != nil {
return err
}
logger := log.WithFields(log.Fields{
"room_id": roomID,
"type": updates[i].Type,
})
if updates[i].NewRoomEvent != nil {
logger = logger.WithFields(log.Fields{
"event_type": updates[i].NewRoomEvent.Event.Type(),
"event_id": updates[i].NewRoomEvent.Event.EventID(),
"adds_state": len(updates[i].NewRoomEvent.AddsStateEventIDs),
"removes_state": len(updates[i].NewRoomEvent.RemovesStateEventIDs),
"send_as_server": updates[i].NewRoomEvent.SendAsServer,
"sender": updates[i].NewRoomEvent.Event.Sender(),
})
}
logger.Infof("Producing to topic '%s'", r.OutputRoomEventTopic)
messages[i] = &sarama.ProducerMessage{
Topic: r.OutputRoomEventTopic,
Key: sarama.StringEncoder(roomID),
Value: sarama.ByteEncoder(value),
}
}
return r.Producer.SendMessages(messages)
}
// InputRoomEvents implements api.RoomserverInternalAPI
func (r *Inputer) InputRoomEvents(
ctx context.Context,
request *api.InputRoomEventsRequest,
response *api.InputRoomEventsResponse,
) (err error) {
for i, e := range request.InputRoomEvents {
roomID := "global"
if r.DB.SupportsConcurrentRoomInputs() {
roomID = e.Event.RoomID()
}
mutex, _ := r.mutexes.LoadOrStore(roomID, &sync.Mutex{})
mutex.(*sync.Mutex).Lock()
if response.EventID, err = r.processRoomEvent(ctx, request.InputRoomEvents[i]); err != nil {
mutex.(*sync.Mutex).Unlock()
return err
}
mutex.(*sync.Mutex).Unlock()
}
return nil
}
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