xref: /webtrees/app/Http/Middleware/UseTransaction.php (revision fcfa147e10aaa6c7ff580c29bd6e5b88666befc1) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2019 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
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 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees\Http\Middleware;
21
22use Illuminate\Database\Capsule\Manager as DB;
23use Psr\Http\Message\ResponseInterface;
24use Psr\Http\Message\ServerRequestInterface;
25use Psr\Http\Server\MiddlewareInterface;
26use Psr\Http\Server\RequestHandlerInterface;
27
28/**
29 * Middleware to wrap a request in a transaction.
30 */
31class UseTransaction implements MiddlewareInterface
32{
33    // If a transaction deadlock occurs, try again.
34    private const DEADLOCK_RETRY_ATTEMPTS = 3;
35
36    /**
37     * @param ServerRequestInterface  $request
38     * @param RequestHandlerInterface $handler
39     *
40     * @return ResponseInterface
41     */
42    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
43    {
44        DB::connection()->transaction(static function () use ($request, $handler, &$response) {
45            $response = $handler->handle($request);
46        }, self::DEADLOCK_RETRY_ATTEMPTS);
47
48        return $response;
49    }
50}
51