From 72e90545454c0e014318fa3c81658e035aac58c1 Mon Sep 17 00:00:00 2001
From: Pierre Schmitz <pierre@archlinux.de>
Date: Wed, 10 Jun 2009 13:00:47 +0200
Subject: applying patch to version 1.15.0

---
 maintenance/gearman/gearman.inc             | 104 ++++++++++++++++++++++++++++
 maintenance/gearman/gearmanRefreshLinks.php |  45 ++++++++++++
 maintenance/gearman/gearmanWorker.php       |  41 +++++++++++
 3 files changed, 190 insertions(+)
 create mode 100644 maintenance/gearman/gearman.inc
 create mode 100644 maintenance/gearman/gearmanRefreshLinks.php
 create mode 100644 maintenance/gearman/gearmanWorker.php

(limited to 'maintenance/gearman')

diff --git a/maintenance/gearman/gearman.inc b/maintenance/gearman/gearman.inc
new file mode 100644
index 00000000..a2a4018a
--- /dev/null
+++ b/maintenance/gearman/gearman.inc
@@ -0,0 +1,104 @@
+<?php
+
+require( 'Net/Gearman/Client.php' );
+require( 'Net/Gearman/Worker.php' );
+
+class MWGearmanJob extends Net_Gearman_Job_Common {
+	function switchWiki( $wiki, $params ) {
+		echo "Switching to $wiki\n";
+
+		# Pretend that we have completed it right now, because the new process won't do it
+		$this->complete( array( 'result' => true ) );
+		socket_close( $this->conn );
+
+		# Close some more sockets
+		wfGetLBFactory()->shutdown();
+		global $wgMemc;
+		$wgMemc->disconnect_all();
+
+		# Find PHP
+		$php = readlink( '/proc/' . posix_getpid() . '/exe' );
+		
+		# Run the worker script
+		$args = array( $_SERVER['PHP_SELF'], 
+			'--wiki', $wiki,
+			'--fake-job', serialize( $params ) );
+		$args = array_merge( $args, $GLOBALS['args'] );
+		pcntl_exec( $php, $args, $_ENV );
+		echo "Error running exec\n";
+	}
+
+	function run( $params ) {
+		if ( wfWikiID() !== $params['wiki'] ) {
+			$this->switchWiki( $params['wiki'], $params );
+		}
+		return self::runNoSwitch( $params );
+	}
+
+	static function runNoSwitch( $params ) {
+		echo implode( ' ', $params ) . "\n";
+		$title = Title::newFromText( $params['title'] );
+		$mwJob = Job::factory( $params['command'], $title, $params['params'] );
+		return $mwJob->run();
+	}
+}
+
+class NonScaryGearmanWorker extends Net_Gearman_Worker {
+	
+	/**
+	 * Copied from Net_Gearman_Worker but with the scary "run any PHP file in 
+	 * the filesystem" feature removed.
+	 */
+	protected function doWork($socket) {
+		Net_Gearman_Connection::send($socket, 'grab_job');
+
+		$resp = array('function' => 'noop');
+		while (count($resp) && $resp['function'] == 'noop') {
+			$resp = Net_Gearman_Connection::blockingRead($socket);
+		} 
+
+		if (in_array($resp['function'], array('noop', 'no_job'))) {
+			return false;
+		}
+
+		if ($resp['function'] != 'job_assign') {
+			throw new Net_Gearman_Exception('Holy Cow! What are you doing?!');
+		}
+
+		$name   = $resp['data']['func'];
+		$handle = $resp['data']['handle'];
+		$arg    = array();
+
+		if (isset($resp['data']['arg']) && 
+			Net_Gearman_Connection::stringLength($resp['data']['arg'])) {
+				$arg = json_decode($resp['data']['arg'], true);
+			}
+
+		### START MW DIFFERENT BIT
+		if ( $name != 'mw_job' ) {
+			throw new Net_Gearman_Job_Exception('Invalid function');
+		}
+		$job = new MWGearmanJob($socket, $handle);
+		### END MW DIFFERENT BIT
+
+		try {
+			$this->start($handle, $name, $arg);
+			$res = $job->run($arg); 
+			if (!is_array($res)) {
+				$res = array('result' => $res);
+			}
+
+			$job->complete($res);
+			$this->complete($handle, $name, $res);
+		} catch (Net_Gearman_Job_Exception $e) {
+			$job->fail(); 
+			$this->fail($handle, $name, $e); 
+		}
+
+		// Force the job's destructor to run
+		$job = null;
+
+		return true;
+	}
+}
+
diff --git a/maintenance/gearman/gearmanRefreshLinks.php b/maintenance/gearman/gearmanRefreshLinks.php
new file mode 100644
index 00000000..eb3104eb
--- /dev/null
+++ b/maintenance/gearman/gearmanRefreshLinks.php
@@ -0,0 +1,45 @@
+<?php
+
+$optionsWithArgs = array( 'fake-job' );
+
+require( dirname(__FILE__).'/../commandLine.inc' );
+require( dirname(__FILE__).'/gearman.inc' );
+
+if ( !$args ) {
+	$args = array( 'localhost' );
+}
+$client = new Net_Gearman_Client( $args );
+$batchSize = 1000;
+
+$dbr = wfGetDB( DB_SLAVE );
+$startId = 0;
+$endId = $dbr->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );
+while ( true ) {
+	$res = $dbr->select( 
+		'page', 
+		array( 'page_namespace', 'page_title', 'page_id' ),
+		array( 'page_id > ' . intval( $startId ) ), 
+		__METHOD__,
+		array( 'LIMIT' => $batchSize ) 
+	);
+
+	if ( $res->numRows() == 0 ) {
+		break;
+	}
+	$set = new Net_Gearman_Set;
+	foreach ( $res as $row ) {
+		$startId = $row->page_id;
+		$title = Title::makeTitle( $row->page_namespace, $row->page_title );
+		$params = array(
+			'wiki' => wfWikiID(),
+			'title' => $title->getPrefixedDBkey(),
+			'command' => 'refreshLinks',
+			'params' => false,
+		);
+		$task = new Net_Gearman_Task( 'mw_job', $params );
+		$set->addTask( $task );
+	}
+	$client->runSet( $set );
+	print "$startId / $endId\n";
+}
+
diff --git a/maintenance/gearman/gearmanWorker.php b/maintenance/gearman/gearmanWorker.php
new file mode 100644
index 00000000..0b26ff9f
--- /dev/null
+++ b/maintenance/gearman/gearmanWorker.php
@@ -0,0 +1,41 @@
+<?php
+
+$optionsWithArgs = array( 'fake-job', 'procs' );
+require( dirname(__FILE__).'/../commandLine.inc' );
+require( dirname(__FILE__).'/gearman.inc' );
+
+if ( isset( $options['procs'] ) ) {
+	$procs = $options['procs'];
+	if ( $procs < 1 || $procs > 1000 ) {
+		echo "Invalid number of processes, please specify a number between 1 and 1000\n";
+		exit( 1 );
+	}
+	$fc = new ForkController( $procs, ForkController::RESTART_ON_ERROR );
+	if ( $fc->start() != 'child' ) {
+		exit( 0 );
+	}
+}
+
+if ( !$args ) {
+	$args = array( 'localhost' );
+}
+
+if ( isset( $options['fake-job'] ) ) {
+	$params = unserialize( $options['fake-job'] );
+	MWGearmanJob::runNoSwitch( $params );
+}
+
+$worker = new NonScaryGearmanWorker( $args );
+$worker->addAbility( 'mw_job' );
+$worker->beginWork( 'wfGearmanMonitor' );
+
+function wfGearmanMonitor( $idle, $lastJob ) {
+	static $lastSleep = 0;
+	$interval = 5;
+	$now = time();
+	if ( $now - $lastSleep >= $interval ) {
+		wfWaitForSlaves( $interval );
+		$lastSleep = $now;
+	}
+	return false;
+}
-- 
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