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https://github.com/hoernschen/dendrite.git
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72285b2659
Sister PR to https://github.com/matrix-org/gomatrixserverlib/pull/364 Read this commit by commit to avoid going insane.
107 lines
3.3 KiB
Go
107 lines
3.3 KiB
Go
// Copyright 2022 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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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/gomatrixserverlib/spec"
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)
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const assumedOfflineSchema = `
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CREATE TABLE IF NOT EXISTS federationsender_assumed_offline(
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-- The assumed offline server name
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server_name TEXT PRIMARY KEY NOT NULL
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);
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`
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const insertAssumedOfflineSQL = "" +
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"INSERT INTO federationsender_assumed_offline (server_name) VALUES ($1)" +
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" ON CONFLICT DO NOTHING"
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const selectAssumedOfflineSQL = "" +
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"SELECT server_name FROM federationsender_assumed_offline WHERE server_name = $1"
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const deleteAssumedOfflineSQL = "" +
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"DELETE FROM federationsender_assumed_offline WHERE server_name = $1"
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const deleteAllAssumedOfflineSQL = "" +
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"TRUNCATE federationsender_assumed_offline"
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type assumedOfflineStatements struct {
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db *sql.DB
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insertAssumedOfflineStmt *sql.Stmt
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selectAssumedOfflineStmt *sql.Stmt
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deleteAssumedOfflineStmt *sql.Stmt
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deleteAllAssumedOfflineStmt *sql.Stmt
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}
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func NewPostgresAssumedOfflineTable(db *sql.DB) (s *assumedOfflineStatements, err error) {
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s = &assumedOfflineStatements{
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db: db,
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}
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_, err = db.Exec(assumedOfflineSchema)
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if err != nil {
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return
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}
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return s, sqlutil.StatementList{
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{&s.insertAssumedOfflineStmt, insertAssumedOfflineSQL},
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{&s.selectAssumedOfflineStmt, selectAssumedOfflineSQL},
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{&s.deleteAssumedOfflineStmt, deleteAssumedOfflineSQL},
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{&s.deleteAllAssumedOfflineStmt, deleteAllAssumedOfflineSQL},
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}.Prepare(db)
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}
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func (s *assumedOfflineStatements) InsertAssumedOffline(
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ctx context.Context, txn *sql.Tx, serverName spec.ServerName,
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) error {
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stmt := sqlutil.TxStmt(txn, s.insertAssumedOfflineStmt)
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_, err := stmt.ExecContext(ctx, serverName)
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return err
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}
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func (s *assumedOfflineStatements) SelectAssumedOffline(
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ctx context.Context, txn *sql.Tx, serverName spec.ServerName,
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) (bool, error) {
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stmt := sqlutil.TxStmt(txn, s.selectAssumedOfflineStmt)
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res, err := stmt.QueryContext(ctx, serverName)
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if err != nil {
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return false, err
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}
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defer res.Close() // nolint:errcheck
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// The query will return the server name if the server is assume offline, and
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// will return no rows if not. By calling Next, we find out if a row was
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// returned or not - we don't care about the value itself.
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return res.Next(), nil
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}
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func (s *assumedOfflineStatements) DeleteAssumedOffline(
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ctx context.Context, txn *sql.Tx, serverName spec.ServerName,
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) error {
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stmt := sqlutil.TxStmt(txn, s.deleteAssumedOfflineStmt)
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_, err := stmt.ExecContext(ctx, serverName)
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return err
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}
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func (s *assumedOfflineStatements) DeleteAllAssumedOffline(
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ctx context.Context, txn *sql.Tx,
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) error {
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stmt := sqlutil.TxStmt(txn, s.deleteAllAssumedOfflineStmt)
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_, err := stmt.ExecContext(ctx)
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return err
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}
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