42dd962425
* Initial work on persistent queues * Update index for event ID and server name * Put things into database (postgres for now) * Duplicate postgres code into sqlite for now just to stop build errors, will fix SQLite soon * Fix table name * Fix index * Fix table name * Use RETURNING because LastInsertID is not supported by postgres * Use functions * Marshal headered event * Don't error on now rows * Don't block if there are PDUs waiting * Try to tidy up JSON * Debug logging * Fix query, use transactions in postgres * Clean up * Rehydrate more opportunistically * Fix SQLite * remove unused types * Review comments * Shuffle things around a bit * Clean up transaction properly * Don't send empty transactions * Reduce unnecessary retries * Count PDUs to make more resilient * Don't stop when there is work to be done * Try to limit wakeups * well this is tedious * Fix race in incomplete transactions * Thread safety on transaction ID/count
111 lines
3 KiB
Go
111 lines
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 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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)
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const queueJSONSchema = `
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-- The federationsender_queue_json table contains event contents that
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-- we failed to send.
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CREATE TABLE IF NOT EXISTS federationsender_queue_json (
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-- The JSON NID. This allows the federationsender_queue_retry table to
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-- cross-reference to find the JSON blob.
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json_nid BIGSERIAL,
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-- The JSON body. Text so that we preserve UTF-8.
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json_body TEXT NOT NULL
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);
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`
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const insertJSONSQL = "" +
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"INSERT INTO federationsender_queue_json (json_body)" +
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" VALUES ($1)" +
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" RETURNING json_nid"
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const deleteJSONSQL = "" +
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"DELETE FROM federationsender_queue_json WHERE json_nid = ANY($1)"
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const selectJSONSQL = "" +
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"SELECT json_nid, json_body FROM federationsender_queue_json" +
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" WHERE json_nid = ANY($1)"
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type queueJSONStatements struct {
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insertJSONStmt *sql.Stmt
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deleteJSONStmt *sql.Stmt
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selectJSONStmt *sql.Stmt
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}
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func (s *queueJSONStatements) prepare(db *sql.DB) (err error) {
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_, err = db.Exec(queueJSONSchema)
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if err != nil {
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return
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}
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if s.insertJSONStmt, err = db.Prepare(insertJSONSQL); err != nil {
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return
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}
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if s.deleteJSONStmt, err = db.Prepare(deleteJSONSQL); err != nil {
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return
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}
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if s.selectJSONStmt, err = db.Prepare(selectJSONSQL); err != nil {
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return
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}
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return
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}
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func (s *queueJSONStatements) insertQueueJSON(
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ctx context.Context, txn *sql.Tx, json string,
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) (int64, error) {
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stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
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var lastid int64
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if err := stmt.QueryRowContext(ctx, json).Scan(&lastid); err != nil {
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return 0, err
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}
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return lastid, nil
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}
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func (s *queueJSONStatements) deleteQueueJSON(
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ctx context.Context, txn *sql.Tx, nids []int64,
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) error {
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stmt := sqlutil.TxStmt(txn, s.deleteJSONStmt)
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_, err := stmt.ExecContext(ctx, pq.Int64Array(nids))
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return err
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}
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func (s *queueJSONStatements) selectQueueJSON(
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ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
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) (map[int64][]byte, error) {
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blobs := map[int64][]byte{}
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stmt := sqlutil.TxStmt(txn, s.selectJSONStmt)
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rows, err := stmt.QueryContext(ctx, pq.Int64Array(jsonNIDs))
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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, "selectJSON: rows.close() failed")
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for rows.Next() {
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var nid int64
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var blob []byte
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if err = rows.Scan(&nid, &blob); err != nil {
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return nil, err
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}
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blobs[nid] = blob
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}
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return blobs, err
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}
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