mirror of
https://github.com/matrix-org/dendrite
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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.
157 lines
4.4 KiB
Go
157 lines
4.4 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/lib/pq"
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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/gomatrixserverlib"
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"github.com/matrix-org/gomatrixserverlib/spec"
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)
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const relayQueueSchema = `
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CREATE TABLE IF NOT EXISTS relayapi_queue (
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-- The transaction ID that was generated before persisting the event.
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transaction_id TEXT NOT NULL,
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-- The destination server that we will send the event to.
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server_name TEXT NOT NULL,
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-- The JSON NID from the relayapi_queue_json table.
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json_nid BIGINT NOT NULL
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);
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CREATE UNIQUE INDEX IF NOT EXISTS relayapi_queue_queue_json_nid_idx
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ON relayapi_queue (json_nid, server_name);
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CREATE INDEX IF NOT EXISTS relayapi_queue_json_nid_idx
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ON relayapi_queue (json_nid);
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CREATE INDEX IF NOT EXISTS relayapi_queue_server_name_idx
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ON relayapi_queue (server_name);
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`
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const insertQueueEntrySQL = "" +
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"INSERT INTO relayapi_queue (transaction_id, server_name, json_nid)" +
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" VALUES ($1, $2, $3)"
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const deleteQueueEntriesSQL = "" +
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"DELETE FROM relayapi_queue WHERE server_name = $1 AND json_nid = ANY($2)"
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const selectQueueEntriesSQL = "" +
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"SELECT json_nid FROM relayapi_queue" +
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" WHERE server_name = $1" +
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" ORDER BY json_nid" +
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" LIMIT $2"
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const selectQueueEntryCountSQL = "" +
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"SELECT COUNT(*) FROM relayapi_queue" +
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" WHERE server_name = $1"
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type relayQueueStatements struct {
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db *sql.DB
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insertQueueEntryStmt *sql.Stmt
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deleteQueueEntriesStmt *sql.Stmt
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selectQueueEntriesStmt *sql.Stmt
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selectQueueEntryCountStmt *sql.Stmt
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}
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func NewPostgresRelayQueueTable(
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db *sql.DB,
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) (s *relayQueueStatements, err error) {
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s = &relayQueueStatements{
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db: db,
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}
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_, err = s.db.Exec(relayQueueSchema)
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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.insertQueueEntryStmt, insertQueueEntrySQL},
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{&s.deleteQueueEntriesStmt, deleteQueueEntriesSQL},
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{&s.selectQueueEntriesStmt, selectQueueEntriesSQL},
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{&s.selectQueueEntryCountStmt, selectQueueEntryCountSQL},
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}.Prepare(db)
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}
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func (s *relayQueueStatements) InsertQueueEntry(
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ctx context.Context,
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txn *sql.Tx,
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transactionID gomatrixserverlib.TransactionID,
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serverName spec.ServerName,
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nid int64,
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) error {
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stmt := sqlutil.TxStmt(txn, s.insertQueueEntryStmt)
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_, err := stmt.ExecContext(
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ctx,
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transactionID, // the transaction ID that we initially attempted
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serverName, // destination server name
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nid, // JSON blob NID
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)
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return err
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}
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func (s *relayQueueStatements) DeleteQueueEntries(
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ctx context.Context,
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txn *sql.Tx,
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serverName spec.ServerName,
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jsonNIDs []int64,
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) error {
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stmt := sqlutil.TxStmt(txn, s.deleteQueueEntriesStmt)
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_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(jsonNIDs))
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return err
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}
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func (s *relayQueueStatements) SelectQueueEntries(
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ctx context.Context,
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txn *sql.Tx,
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serverName spec.ServerName,
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limit int,
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) ([]int64, error) {
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stmt := sqlutil.TxStmt(txn, s.selectQueueEntriesStmt)
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rows, err := stmt.QueryContext(ctx, serverName, limit)
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
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var result []int64
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for rows.Next() {
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var nid int64
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if err = rows.Scan(&nid); err != nil {
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return nil, err
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}
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result = append(result, nid)
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}
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return result, rows.Err()
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}
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func (s *relayQueueStatements) SelectQueueEntryCount(
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ctx context.Context,
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txn *sql.Tx,
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serverName spec.ServerName,
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) (int64, error) {
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var count int64
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stmt := sqlutil.TxStmt(txn, s.selectQueueEntryCountStmt)
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err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
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if err == sql.ErrNoRows {
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// It's acceptable for there to be no rows referencing a given
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// JSON NID but it's not an error condition. Just return as if
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// there's a zero count.
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return 0, nil
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}
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return count, err
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}
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