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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/gomatrixserverlib"
"github.com/matrix-org/dendrite/federationapi/storage/postgres/deltas"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
)
const queueEDUsSchema = `
CREATE TABLE IF NOT EXISTS federationsender_queue_edus (
-- The type of the event (informational).
edu_type TEXT NOT NULL,
-- The domain part of the user ID the EDU event is for.
server_name TEXT NOT NULL,
-- The JSON NID from the federationsender_queue_edus_json table.
json_nid BIGINT NOT NULL,
-- The expiry time of this edu, if any.
expires_at BIGINT NOT NULL DEFAULT 0
);
CREATE UNIQUE INDEX IF NOT EXISTS federationsender_queue_edus_json_nid_idx
ON federationsender_queue_edus (json_nid, server_name);
CREATE INDEX IF NOT EXISTS federationsender_queue_edus_nid_idx
ON federationsender_queue_edus (json_nid);
CREATE INDEX IF NOT EXISTS federationsender_queue_edus_server_name_idx
ON federationsender_queue_edus (server_name);
`
const insertQueueEDUSQL = "" +
"INSERT INTO federationsender_queue_edus (edu_type, server_name, json_nid, expires_at)" +
" VALUES ($1, $2, $3, $4)"
const deleteQueueEDUSQL = "" +
"DELETE FROM federationsender_queue_edus WHERE server_name = $1 AND json_nid = ANY($2)"
const selectQueueEDUSQL = "" +
"SELECT json_nid FROM federationsender_queue_edus" +
" WHERE server_name = $1" +
" LIMIT $2"
const selectQueueEDUReferenceJSONCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_edus" +
" WHERE json_nid = $1"
const selectQueueEDUCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_edus" +
" WHERE server_name = $1"
const selectQueueServerNamesSQL = "" +
"SELECT DISTINCT server_name FROM federationsender_queue_edus"
const selectExpiredEDUsSQL = "" +
"SELECT DISTINCT json_nid FROM federationsender_queue_edus WHERE expires_at > 0 AND expires_at <= $1"
const deleteExpiredEDUsSQL = "" +
"DELETE FROM federationsender_queue_edus WHERE expires_at > 0 AND expires_at <= $1"
type queueEDUsStatements struct {
db *sql.DB
insertQueueEDUStmt *sql.Stmt
deleteQueueEDUStmt *sql.Stmt
selectQueueEDUStmt *sql.Stmt
selectQueueEDUReferenceJSONCountStmt *sql.Stmt
selectQueueEDUCountStmt *sql.Stmt
selectQueueEDUServerNamesStmt *sql.Stmt
selectExpiredEDUsStmt *sql.Stmt
deleteExpiredEDUsStmt *sql.Stmt
}
func NewPostgresQueueEDUsTable(db *sql.DB) (s *queueEDUsStatements, err error) {
s = &queueEDUsStatements{
db: db,
}
_, err = s.db.Exec(queueEDUsSchema)
if err != nil {
return s, err
}
m := sqlutil.NewMigrator(db)
m.AddMigrations(
sqlutil.Migration{
Version: "federationapi: add expiresat column",
Up: deltas.UpAddexpiresat,
},
)
if err := m.Up(context.Background()); err != nil {
return s, err
}
return s, nil
}
func (s *queueEDUsStatements) Prepare() error {
return sqlutil.StatementList{
{&s.insertQueueEDUStmt, insertQueueEDUSQL},
{&s.deleteQueueEDUStmt, deleteQueueEDUSQL},
{&s.selectQueueEDUStmt, selectQueueEDUSQL},
{&s.selectQueueEDUReferenceJSONCountStmt, selectQueueEDUReferenceJSONCountSQL},
{&s.selectQueueEDUCountStmt, selectQueueEDUCountSQL},
{&s.selectQueueEDUServerNamesStmt, selectQueueServerNamesSQL},
{&s.selectExpiredEDUsStmt, selectExpiredEDUsSQL},
{&s.deleteExpiredEDUsStmt, deleteExpiredEDUsSQL},
}.Prepare(s.db)
}
func (s *queueEDUsStatements) InsertQueueEDU(
ctx context.Context,
txn *sql.Tx,
eduType string,
serverName gomatrixserverlib.ServerName,
nid int64,
expiresAt gomatrixserverlib.Timestamp,
) error {
stmt := sqlutil.TxStmt(txn, s.insertQueueEDUStmt)
_, err := stmt.ExecContext(
ctx,
eduType, // the EDU type
serverName, // destination server name
nid, // JSON blob NID
expiresAt, // timestamp of expiry
)
return err
}
func (s *queueEDUsStatements) DeleteQueueEDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
jsonNIDs []int64,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteQueueEDUStmt)
_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(jsonNIDs))
return err
}
func (s *queueEDUsStatements) SelectQueueEDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
limit int,
) ([]int64, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueueEDUStmt)
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 *queueEDUsStatements) SelectQueueEDUReferenceJSONCount(
ctx context.Context, txn *sql.Tx, jsonNID int64,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueueEDUReferenceJSONCountStmt)
err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
if err == sql.ErrNoRows {
return -1, nil
}
return count, err
}
func (s *queueEDUsStatements) SelectQueueEDUCount(
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueueEDUCountStmt)
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 *queueEDUsStatements) SelectQueueEDUServerNames(
ctx context.Context, txn *sql.Tx,
) ([]gomatrixserverlib.ServerName, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueueEDUServerNamesStmt)
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()
}
func (s *queueEDUsStatements) SelectExpiredEDUs(
ctx context.Context, txn *sql.Tx,
expiredBefore gomatrixserverlib.Timestamp,
) ([]int64, error) {
stmt := sqlutil.TxStmt(txn, s.selectExpiredEDUsStmt)
rows, err := stmt.QueryContext(ctx, expiredBefore)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "SelectExpiredEDUs: rows.close() failed")
var result []int64
var nid int64
for rows.Next() {
if err = rows.Scan(&nid); err != nil {
return nil, err
}
result = append(result, nid)
}
return result, rows.Err()
}
func (s *queueEDUsStatements) DeleteExpiredEDUs(
ctx context.Context, txn *sql.Tx,
expiredBefore gomatrixserverlib.Timestamp,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteExpiredEDUsStmt)
_, err := stmt.ExecContext(ctx, expiredBefore)
return err
}
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