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https://github.com/matrix-org/dendrite
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100fa9b235
This should avoid unnecessary logging on startup if the migration (were we need `InsertMigration`) was already executed. This now checks for "unique constraint errors" for SQLite and Postgres and fails the startup process if the migration couldn't be manually inserted for some other reason.
132 lines
4.1 KiB
Go
132 lines
4.1 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 sqlite3
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/keyserver/storage/sqlite3/deltas"
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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 TABLE IF NOT EXISTS keyserver_key_changes (
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change_id INTEGER PRIMARY KEY AUTOINCREMENT,
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-- The key owner
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user_id TEXT NOT NULL,
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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 OR REPLACE INTO keyserver_key_changes (user_id)" +
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" VALUES ($1)" +
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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 NewSqliteKeyChangesTable(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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if err != nil {
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return s, err
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}
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if err = executeMigration(context.Background(), db); err != nil {
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return nil, err
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}
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return s, nil
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}
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func executeMigration(ctx context.Context, db *sql.DB) error {
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// TODO: Remove when we are sure we are not having goose artefacts in the db
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// This forces an error, which indicates the migration is already applied, since the
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// column partition was removed from the table
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migrationName := "keyserver: refactor key changes"
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var cName string
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err := db.QueryRowContext(ctx, `SELECT p.name FROM sqlite_master AS m JOIN pragma_table_info(m.name) AS p WHERE m.name = 'keyserver_key_changes' AND p.name = 'partition'`).Scan(&cName)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) { // migration was already executed, as the column was removed
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if err = sqlutil.InsertMigration(ctx, db, migrationName); err != nil {
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return fmt.Errorf("unable to manually insert migration '%s': %w", migrationName, err)
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}
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return nil
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}
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return err
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}
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m := sqlutil.NewMigrator(db)
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m.AddMigrations(sqlutil.Migration{
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Version: migrationName,
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Up: deltas.UpRefactorKeyChanges,
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})
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return m.Up(ctx)
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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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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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