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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"
"github.com/matrix-org/gomatrixserverlib"
)
const queuePDUsSchema = `
CREATE TABLE IF NOT EXISTS federationsender_queue_pdus (
-- The transaction ID that was generated before persisting the event.
transaction_id TEXT NOT NULL,
-- The destination server that we will send the event to.
server_name TEXT NOT NULL,
-- The JSON NID from the federationsender_queue_pdus_json table.
json_nid BIGINT NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS federationsender_queue_pdus_pdus_json_nid_idx
ON federationsender_queue_pdus (json_nid, server_name);
`
const insertQueuePDUSQL = "" +
"INSERT INTO federationsender_queue_pdus (transaction_id, server_name, json_nid)" +
" VALUES ($1, $2, $3)"
const deleteQueuePDUSQL = "" +
"DELETE FROM federationsender_queue_pdus WHERE server_name = $1 AND json_nid = ANY($2)"
const selectQueuePDUsSQL = "" +
"SELECT json_nid FROM federationsender_queue_pdus" +
" WHERE server_name = $1" +
" LIMIT $2"
const selectQueuePDUReferenceJSONCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_pdus" +
" WHERE json_nid = $1"
const selectQueuePDUsCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_pdus" +
" WHERE server_name = $1"
const selectQueuePDUServerNamesSQL = "" +
"SELECT DISTINCT server_name FROM federationsender_queue_pdus"
type queuePDUsStatements struct {
db *sql.DB
insertQueuePDUStmt *sql.Stmt
deleteQueuePDUsStmt *sql.Stmt
selectQueuePDUsStmt *sql.Stmt
selectQueuePDUReferenceJSONCountStmt *sql.Stmt
selectQueuePDUsCountStmt *sql.Stmt
selectQueuePDUServerNamesStmt *sql.Stmt
}
func NewPostgresQueuePDUsTable(db *sql.DB) (s *queuePDUsStatements, err error) {
s = &queuePDUsStatements{
db: db,
}
_, err = s.db.Exec(queuePDUsSchema)
if err != nil {
return
}
if s.insertQueuePDUStmt, err = s.db.Prepare(insertQueuePDUSQL); err != nil {
return
}
if s.deleteQueuePDUsStmt, err = s.db.Prepare(deleteQueuePDUSQL); err != nil {
return
}
if s.selectQueuePDUsStmt, err = s.db.Prepare(selectQueuePDUsSQL); err != nil {
return
}
if s.selectQueuePDUReferenceJSONCountStmt, err = s.db.Prepare(selectQueuePDUReferenceJSONCountSQL); err != nil {
return
}
if s.selectQueuePDUsCountStmt, err = s.db.Prepare(selectQueuePDUsCountSQL); err != nil {
return
}
if s.selectQueuePDUServerNamesStmt, err = s.db.Prepare(selectQueuePDUServerNamesSQL); err != nil {
return
}
return
}
func (s *queuePDUsStatements) InsertQueuePDU(
ctx context.Context,
txn *sql.Tx,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nid int64,
) error {
stmt := sqlutil.TxStmt(txn, s.insertQueuePDUStmt)
_, err := stmt.ExecContext(
ctx,
transactionID, // the transaction ID that we initially attempted
serverName, // destination server name
nid, // JSON blob NID
)
return err
}
func (s *queuePDUsStatements) DeleteQueuePDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
jsonNIDs []int64,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteQueuePDUsStmt)
_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(jsonNIDs))
return err
}
func (s *queuePDUsStatements) SelectQueuePDUReferenceJSONCount(
ctx context.Context, txn *sql.Tx, jsonNID int64,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUReferenceJSONCountStmt)
err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
if err == sql.ErrNoRows {
// It's acceptable for there to be no rows referencing a given
// JSON NID but it's not an error condition. Just return as if
// there's a zero count.
return 0, nil
}
return count, err
}
func (s *queuePDUsStatements) SelectQueuePDUCount(
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsCountStmt)
err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
if err == sql.ErrNoRows {
// It's acceptable for there to be no rows referencing a given
// JSON NID but it's not an error condition. Just return as if
// there's a zero count.
return 0, nil
}
return count, err
}
func (s *queuePDUsStatements) SelectQueuePDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
limit int,
) ([]int64, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsStmt)
rows, err := stmt.QueryContext(ctx, serverName, limit)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
var result []int64
for rows.Next() {
var nid int64
if err = rows.Scan(&nid); err != nil {
return nil, err
}
result = append(result, nid)
}
return result, rows.Err()
}
func (s *queuePDUsStatements) SelectQueuePDUServerNames(
ctx context.Context, txn *sql.Tx,
) ([]gomatrixserverlib.ServerName, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUServerNamesStmt)
rows, err := stmt.QueryContext(ctx)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
var result []gomatrixserverlib.ServerName
for rows.Next() {
var serverName gomatrixserverlib.ServerName
if err = rows.Scan(&serverName); err != nil {
return nil, err
}
result = append(result, serverName)
}
return result, rows.Err()
}
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