Extension:DatabaseFetchHook.php

<?php

1. Extension:DatabaseFetchHookTemplate:Php

These are the MediaWiki extensions we're using and/or developing. Please refer to the information on the mediawiki.org wiki for installation and usage details. Extensions here which have no corresponding mediawiki article are either not ready for use or have been superseded. You can also browse our extension code in our local Subversion repository or our GitHub mirror.

1. - See http://www.mediawiki.org/wiki/Extension:DatabaseFetchHook for installation and usage details
2. - Started: 2007-03-05
3. - Licenced under LGPL (http://www.gnu.org/copyleft/lesser.html)

if (!defined('MEDIAWIKI')) die('Not an entry point.');

define('DFH_VERSION','2.0.0, 2007-10-11');

$wgExtensionCredits['parserhook'][] = array( 'name' => "DatabaseFetchHook", 'author' => 'User:Nad', 'description' => 'Dynamically adds a new hook to intercept the database fetchObject and fetchRow methods', 'url' => 'http://www.mediawiki.org/wiki/Extension:DatabaseFetchHook', 'version' => DFH_VERSION );

$wgExtensionFunctions[] = 'wfSetupDatabaseFetchHook';

1. Create a LoadBalancer2 class by extending the existing LoadBalancer

function wfSetupDatabaseFetchHook() { global $wgLoadBalancer,$wgDBtype;

$type = ucfirst($wgDBtype); eval("class Database{$type}2 extends Database{$type}".' {

function fetchObject($res) { $row = parent::fetchObject($res); wfRunHooks("DatabaseFetchHook", array(&$this,&$row)); return $row; }

function fetchRow($res) { $row = parent::fetchRow($res); wfRunHooks("DatabaseFetchHook", array(&$this,&$row)); return $row; } }');

$LoadBalancer = get_class($wgLoadBalancer); $LoadBalancer2 = $LoadBalancer."2"; eval("class $LoadBalancer2 extends $LoadBalancer".' { function reallyOpenConnection(&$server) { $server["type"] .= "2"; $db =& parent::reallyOpenConnection($server); return $db; } }');

# Replace the global LoadBalancer object with an identical instance of the new LoadBalancer2 class $wgLoadBalancer->closeAll(); $oldLoadBalancer = $wgLoadBalancer; $wgLoadBalancer = new $LoadBalancer2($oldLoadBalancer->mServers); foreach(array_keys(get_class_vars($LoadBalancer)) as $k) $wgLoadBalancer->$k = $oldLoadBalancer->$k;

}

?>