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