1/*
2** Zabbix
3** Copyright (C) 2001-2021 Zabbix SIA
4**
5** This program is free software; you can redistribute it and/or modify
6** it under the terms of the GNU General Public License as published by
7** the Free Software Foundation; either version 2 of the License, or
8** (at your option) any later version.
9**
10** This program is distributed in the hope that it will be useful,
11** but WITHOUT ANY WARRANTY; without even the implied warranty of
12** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13** GNU General Public License for more details.
14**
15** You should have received a copy of the GNU General Public License
16** along with this program; if not, write to the Free Software
17** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
18**/
19
20package oracle
21
22import (
23	"context"
24	"fmt"
25)
26
27const (
28	pingFailed = 0
29	pingOk     = 1
30)
31
32// pingHandler queries 'SELECT 1 FROM DUAL' and returns pingOk if a connection is alive or pingFailed otherwise.
33func pingHandler(ctx context.Context, conn OraClient, params map[string]string, _ ...string) (interface{}, error) {
34	var res int
35
36	row, err := conn.QueryRow(ctx, fmt.Sprintf("SELECT %d FROM DUAL", pingOk))
37	if err != nil {
38		return pingFailed, nil
39	}
40
41	err = row.Scan(&res)
42
43	if err != nil || res != pingOk {
44		return pingFailed, nil
45	}
46
47	return pingOk, nil
48}
49