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\Process;
  26 use Friendica\Core\System;
  27 use Friendica\Core\Worker as WorkerCore;
  28 use Friendica\Database\DBA;
  29 use Friendica\DI;
  30 use Friendica\Util\DateTimeFormat;
  31
  32 /**
  33  * Module for starting the backend worker through a frontend call
  34  */
  35 class Worker extends BaseModule
  36 {
  37         public static function rawContent(array $parameters = [])
  38         {
  39                 if (!DI::config()->get("system", "frontend_worker")) {
  40                         return;
  41                 }
  42
  43                 // Ensure that all "strtotime" operations do run timezone independent
  44                 date_default_timezone_set('UTC');
  45
  46                 // We don't need the following lines if we can execute background jobs.
  47                 // So we just wake up the worker if it sleeps.
  48                 if (function_exists("proc_open")) {
  49                         WorkerCore::executeIfIdle();
  50                         return;
  51                 }
  52
  53                 WorkerCore::clearProcesses();
  54
  55                 $workers = DBA::count('process', ['command' => 'worker.php']);
  56
  57                 if ($workers > DI::config()->get("system", "worker_queues", 4)) {
  58                         return;
  59                 }
  60
  61                 DI::process()->start();
  62
  63                 DI::logger()->notice('Front end worker started.', ['pid' => getmypid()]);
  64
  65                 WorkerCore::callWorker();
  66
  67                 if ($r = WorkerCore::workerProcess()) {
  68                         // On most configurations this parameter wouldn't have any effect.
  69                         // But since it doesn't destroy anything, we just try to get more execution time in any way.
  70                         set_time_limit(0);
  71
  72                         $fields = ['executed' => DateTimeFormat::utcNow(), 'pid' => getmypid(), 'done' => false];
  73                         $condition =  ['id' => $r[0]["id"], 'pid' => 0];
  74                         if (DBA::update('workerqueue', $fields, $condition)) {
  75                                 WorkerCore::execute($r[0]);
  76                         }
  77                 }
  78
  79                 WorkerCore::callWorker();
  80
  81                 WorkerCore::unclaimProcess();
  82
  83                 DI::process()->end();
  84
  85                 System::httpExit(200, 'Frontend worker stopped.');
  86         }
  87 }