MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / includes / ForkController.php

diff --git a/includes/ForkController.php b/includes/ForkController.php
index e5b44c2b501d3aa6263cbac7fb78d848df907031..2dde17be0803e073ea7a5e69c724d38cb4eac6dc 100644 (file)
--- a/includes/ForkController.php
+++ b/includes/ForkController.php
@@ -1,4 +1,25 @@
 <?php
+/**
+ * Class for managing forking command line scripts.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+use MediaWiki\MediaWikiServices;
 
 /**
  * Class for managing forking command line scripts.
@@ -10,11 +31,11 @@
  * @ingroup Maintenance
  */
 class ForkController {
-       var $children = array();
-       var $termReceived = false;
-       var $flags = 0, $procsToStart = 0;
+       protected $children = [], $childNumber = 0;
+       protected $termReceived = false;
+       protected $flags = 0, $procsToStart = 0;
 
-       static $restartableSignals = array(
+       protected static $restartableSignals = [
                SIGFPE,
                SIGILL,
                SIGSEGV,
@@ -24,7 +45,7 @@ class ForkController {
                SIGPIPE,
                SIGXCPU,
                SIGXFSZ,
-       );
+       ];
 
        /**
         * Pass this flag to __construct() to cause the class to automatically restart
@@ -33,8 +54,8 @@ class ForkController {
        const RESTART_ON_ERROR = 1;
 
        public function __construct( $numProcs, $flags = 0 ) {
-               if ( php_sapi_name() != 'cli' ) {
-                       throw new MWException( "MultiProcess cannot be used from the web." );
+               if ( PHP_SAPI != 'cli' ) {
+                       throw new MWException( "ForkController cannot be used from the web." );
                }
                $this->procsToStart = $numProcs;
                $this->flags = $flags;
@@ -49,10 +70,11 @@ class ForkController {
         * This will return 'child' in the child processes. In the parent process,
         * it will run until all the child processes exit or a TERM signal is
         * received. It will then return 'done'.
+        * @return string
         */
        public function start() {
                // Trap SIGTERM
-               pcntl_signal( SIGTERM, array( $this, 'handleTermSignal' ), false );
+               pcntl_signal( SIGTERM, [ $this, 'handleTermSignal' ], false );
 
                do {
                        // Start child processes
@@ -100,7 +122,9 @@ class ForkController {
                        if ( function_exists( 'pcntl_signal_dispatch' ) ) {
                                pcntl_signal_dispatch();
                        } else {
-                               declare (ticks=1) { $status = $status; }
+                               declare( ticks = 1 ) {
+                                       $status = $status;
+                               }
                        }
                        // Respond to TERM signal
                        if ( $this->termReceived ) {
@@ -114,16 +138,33 @@ class ForkController {
                return 'done';
        }
 
+       /**
+        * Get the number of the child currently running. Note, this
+        * is not the pid, but rather which of the total number of children
+        * we are
+        * @return int
+        */
+       public function getChildNumber() {
+               return $this->childNumber;
+       }
+
        protected function prepareEnvironment() {
-               global $wgCaches, $wgMemc;
-               // Don't share DB or memcached connections
-               wfGetLBFactory()->destroyInstance();
-               $wgCaches = array();
-               unset( $wgMemc );
+               global $wgMemc;
+               // Don't share DB, storage, or memcached connections
+               MediaWikiServices::resetChildProcessServices();
+               FileBackendGroup::destroySingleton();
+               LockManagerGroup::destroySingletons();
+               JobQueueGroup::destroySingletons();
+               ObjectCache::clear();
+               RedisConnectionPool::destroySingletons();
+               $wgMemc = null;
        }
 
        /**
         * Fork a number of worker processes.
+        *
+        * @param int $numProcs
+        * @return string
         */
        protected function forkWorkers( $numProcs ) {
                $this->prepareEnvironment();
@@ -139,6 +180,7 @@ class ForkController {
 
                        if ( !$pid ) {
                                $this->initChild();
+                               $this->childNumber = $i;
                                return 'child';
                        } else {
                                // This is the parent process