mirror of
https://github.com/matrix-org/dendrite
synced 2024-07-27 07:18:46 +02:00
2c581377a5
* Remodel how device list change IDs are created Previously we made them using the offset Kafka supplied. We don't run Kafka anymore, so now we make the SQL table assign the change ID via an AUTOINCREMENTing ID. Redesign the `keyserver_key_changes` table to have `UNIQUE(user_id)` so we don't accumulate key changes forevermore, we now have at most 1 row per user which contains the highest change ID. This needs a SQL migration. * Ensure we bump the change ID on sqlite * Actually read the DeviceChangeID not the Offset in synapi * Add SQL migrations * Prepare after migration; fixup dendrite-upgrade-test logging * Use higher version numbers; fix sqlite query to increment better * Default 0 on postgres * fixup postgres migration on fresh dendrite instances
103 lines
3.2 KiB
Go
103 lines
3.2 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 postgres
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import (
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"context"
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"database/sql"
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"math"
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"github.com/Shopify/sarama"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/keyserver/storage/tables"
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)
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var keyChangesSchema = `
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-- Stores key change information about users. Used to determine when to send updated device lists to clients.
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CREATE SEQUENCE IF NOT EXISTS keyserver_key_changes_seq;
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CREATE TABLE IF NOT EXISTS keyserver_key_changes (
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change_id BIGINT PRIMARY KEY DEFAULT nextval('keyserver_key_changes_seq'),
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user_id TEXT NOT NULL,
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CONSTRAINT keyserver_key_changes_unique_per_user UNIQUE (user_id)
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);
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`
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// Replace based on user ID. We don't care how many times the user's keys have changed, only that they
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// have changed, hence we can just keep bumping the change ID for this user.
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const upsertKeyChangeSQL = "" +
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"INSERT INTO keyserver_key_changes (user_id)" +
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" VALUES ($1)" +
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" ON CONFLICT ON CONSTRAINT keyserver_key_changes_unique_per_user" +
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" DO UPDATE SET change_id = nextval('keyserver_key_changes_seq')" +
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" RETURNING change_id"
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const selectKeyChangesSQL = "" +
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"SELECT user_id, change_id FROM keyserver_key_changes WHERE change_id > $1 AND change_id <= $2"
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type keyChangesStatements struct {
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db *sql.DB
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upsertKeyChangeStmt *sql.Stmt
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selectKeyChangesStmt *sql.Stmt
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}
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func NewPostgresKeyChangesTable(db *sql.DB) (tables.KeyChanges, error) {
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s := &keyChangesStatements{
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db: db,
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}
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_, err := db.Exec(keyChangesSchema)
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return s, err
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}
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func (s *keyChangesStatements) Prepare() (err error) {
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if s.upsertKeyChangeStmt, err = s.db.Prepare(upsertKeyChangeSQL); err != nil {
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return err
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}
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if s.selectKeyChangesStmt, err = s.db.Prepare(selectKeyChangesSQL); err != nil {
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return err
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}
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return nil
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}
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func (s *keyChangesStatements) InsertKeyChange(ctx context.Context, userID string) (changeID int64, err error) {
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err = s.upsertKeyChangeStmt.QueryRowContext(ctx, userID).Scan(&changeID)
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return
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}
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func (s *keyChangesStatements) SelectKeyChanges(
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ctx context.Context, fromOffset, toOffset int64,
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) (userIDs []string, latestOffset int64, err error) {
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if toOffset == sarama.OffsetNewest {
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toOffset = math.MaxInt64
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}
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latestOffset = fromOffset
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rows, err := s.selectKeyChangesStmt.QueryContext(ctx, fromOffset, toOffset)
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if err != nil {
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return nil, 0, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "selectKeyChangesStmt: rows.close() failed")
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for rows.Next() {
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var userID string
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var offset int64
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if err := rows.Scan(&userID, &offset); err != nil {
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return nil, 0, err
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}
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if offset > latestOffset {
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latestOffset = offset
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}
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userIDs = append(userIDs, userID)
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}
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return
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}
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