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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package postgres
import (
"context"
"database/sql"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
)
const queueJSONSchema = `
-- The federationsender_queue_json table contains event contents that
-- we failed to send.
CREATE TABLE IF NOT EXISTS federationsender_queue_json (
-- The JSON NID. This allows the federationsender_queue_retry table to
-- cross-reference to find the JSON blob.
json_nid BIGSERIAL,
-- The JSON body. Text so that we preserve UTF-8.
json_body TEXT NOT NULL
);
`
const insertJSONSQL = "" +
"INSERT INTO federationsender_queue_json (json_body)" +
" VALUES ($1)" +
" RETURNING json_nid"
const deleteJSONSQL = "" +
"DELETE FROM federationsender_queue_json WHERE json_nid = ANY($1)"
const selectJSONSQL = "" +
"SELECT json_nid, json_body FROM federationsender_queue_json" +
" WHERE json_nid = ANY($1)"
type queueJSONStatements struct {
db *sql.DB
insertJSONStmt *sql.Stmt
deleteJSONStmt *sql.Stmt
selectJSONStmt *sql.Stmt
}
func NewPostgresQueueJSONTable(db *sql.DB) (s *queueJSONStatements, err error) {
s = &queueJSONStatements{
db: db,
}
_, err = s.db.Exec(queueJSONSchema)
if err != nil {
return
}
if s.insertJSONStmt, err = s.db.Prepare(insertJSONSQL); err != nil {
return
}
if s.deleteJSONStmt, err = s.db.Prepare(deleteJSONSQL); err != nil {
return
}
if s.selectJSONStmt, err = s.db.Prepare(selectJSONSQL); err != nil {
return
}
return
}
func (s *queueJSONStatements) InsertQueueJSON(
ctx context.Context, txn *sql.Tx, json string,
) (int64, error) {
stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
var lastid int64
if err := stmt.QueryRowContext(ctx, json).Scan(&lastid); err != nil {
return 0, err
}
return lastid, nil
}
func (s *queueJSONStatements) DeleteQueueJSON(
ctx context.Context, txn *sql.Tx, nids []int64,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteJSONStmt)
_, err := stmt.ExecContext(ctx, pq.Int64Array(nids))
return err
}
func (s *queueJSONStatements) SelectQueueJSON(
ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
) (map[int64][]byte, error) {
blobs := map[int64][]byte{}
stmt := sqlutil.TxStmt(txn, s.selectJSONStmt)
rows, err := stmt.QueryContext(ctx, pq.Int64Array(jsonNIDs))
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectJSON: rows.close() failed")
for rows.Next() {
var nid int64
var blob []byte
if err = rows.Scan(&nid, &blob); err != nil {
return nil, err
}
blobs[nid] = blob
}
return blobs, err
}
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