1<?php 2/** 3 * webtrees: online genealogy 4 * Copyright (C) 2019 webtrees development team 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 3 of the License, or 8 * (at your option) any later version. 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16declare(strict_types=1); 17 18namespace Fisharebest\Webtrees\Http\Middleware; 19 20use Illuminate\Database\Capsule\Manager as DB; 21use Psr\Http\Message\ResponseInterface; 22use Psr\Http\Message\ServerRequestInterface; 23use Psr\Http\Server\MiddlewareInterface; 24use Psr\Http\Server\RequestHandlerInterface; 25 26/** 27 * Middleware to wrap a request in a transaction. 28 */ 29class UseTransaction implements MiddlewareInterface 30{ 31 // If a transaction deadlock occurs, try again. 32 private const DEADLOCK_RETRY_ATTEMPTS = 3; 33 34 /** 35 * @param ServerRequestInterface $request 36 * @param RequestHandlerInterface $handler 37 * 38 * @return ResponseInterface 39 */ 40 public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface 41 { 42 DB::connection()->transaction(static function () use ($request, $handler, &$response) { 43 $response = $handler->handle($request); 44 }, self::DEADLOCK_RETRY_ATTEMPTS); 45 46 return $response; 47 } 48} 49