75 lines
2.3 KiB
Go
75 lines
2.3 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 producers
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import (
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"context"
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"encoding/json"
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"github.com/Shopify/sarama"
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"github.com/matrix-org/dendrite/keyserver/api"
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"github.com/matrix-org/dendrite/keyserver/storage"
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"github.com/sirupsen/logrus"
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)
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// KeyChange produces key change events for the sync API and federation sender to consume
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type KeyChange struct {
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Topic string
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Producer sarama.SyncProducer
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DB storage.Database
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}
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// DefaultPartition returns the default partition this process is sending key changes to.
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// NB: A keyserver MUST send key changes to only 1 partition or else query operations will
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// become inconsistent. Partitions can be sharded (e.g by hash of user ID of key change) but
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// then all keyservers must be queried to calculate the entire set of key changes between
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// two sync tokens.
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func (p *KeyChange) DefaultPartition() int32 {
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return 0
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}
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// ProduceKeyChanges creates new change events for each key
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func (p *KeyChange) ProduceKeyChanges(keys []api.DeviceMessage) error {
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for _, key := range keys {
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var m sarama.ProducerMessage
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value, err := json.Marshal(key)
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if err != nil {
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return err
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}
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m.Topic = string(p.Topic)
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m.Key = sarama.StringEncoder(key.UserID)
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m.Value = sarama.ByteEncoder(value)
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partition, offset, err := p.Producer.SendMessage(&m)
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if err != nil {
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return err
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}
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err = p.DB.StoreKeyChange(context.Background(), partition, offset, key.UserID)
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if err != nil {
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return err
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}
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logrus.WithFields(logrus.Fields{
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"user_id": key.UserID,
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"device_id": key.DeviceID,
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"partition": partition,
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"offset": offset,
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"len_key_bytes": len(key.KeyJSON),
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}).Infof("Produced to key change topic '%s'", p.Topic)
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}
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return nil
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}
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