src/Module/Worker.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module;
  23
  24 use Friendica\BaseModule;
  25 use Friendica\Core\System;
  26 use Friendica\Core\Worker as WorkerCore;
  27 use Friendica\Database\DBA;
  28 use Friendica\DI;
  29 use Friendica\Util\DateTimeFormat;
  30
  31 /**
  32  * Module for starting the backend worker through a frontend call
  33  */
  34 class Worker extends BaseModule
  35 {
  36         public static function rawContent(array $parameters = [])
  37         {
  38                 if (!DI::config()->get("system", "frontend_worker")) {
  39                         return;
  40                 }
  41
  42                 // Ensure that all "strtotime" operations do run timezone independent
  43                 date_default_timezone_set('UTC');
  44
  45                 // We don't need the following lines if we can execute background jobs.
  46                 // So we just wake up the worker if it sleeps.
  47                 if (function_exists("proc_open")) {
  48                         WorkerCore::executeIfIdle();
  49                         return;
  50                 }
  51
  52                 WorkerCore::clearProcesses();
  53
  54                 $workers = DBA::count('process', ['command' => 'worker.php']);
  55
  56                 if ($workers > DI::config()->get("system", "worker_queues", 4)) {
  57                         return;
  58                 }
  59
  60                 WorkerCore::startProcess();
  61
  62                 DI::logger()->notice('Front end worker started.', ['pid' => getmypid()]);
  63
  64                 WorkerCore::callWorker();
  65
  66                 if ($r = WorkerCore::workerProcess()) {
  67                         // On most configurations this parameter wouldn't have any effect.
  68                         // But since it doesn't destroy anything, we just try to get more execution time in any way.
  69                         set_time_limit(0);
  70
  71                         $fields = ['executed' => DateTimeFormat::utcNow(), 'pid' => getmypid(), 'done' => false];
  72                         $condition =  ['id' => $r[0]["id"], 'pid' => 0];
  73                         if (DBA::update('workerqueue', $fields, $condition)) {
  74                                 WorkerCore::execute($r[0]);
  75                         }
  76                 }
  77
  78                 WorkerCore::callWorker();
  79
  80                 WorkerCore::unclaimProcess();
  81
  82                 WorkerCore::endProcess();
  83
  84                 System::httpExit(200, 'Frontend worker stopped.');
  85         }
  86 }