REL1_27/php/getSlaveServer_8php_source.html

<?php

require_once __DIR__ . '/Maintenance.php';


class GetSlaveServer extends Maintenance {


    public function __construct() {

        parent::__construct();

        $this->addOption( "group", "Query group to check specifically" );

        $this->addDescription( 'Report the hostname of a slave server' );

    }


    public function execute() {

        global $wgAllDBsAreLocalhost;

        if ( $wgAllDBsAreLocalhost ) {

            $host = 'localhost';

        } elseif ( $this->hasOption( 'group' ) ) {

            $db = $this->getDB( DB_SLAVE, $this->getOption( 'group' ) );

            $host = $db->getServer();

        } else {

            $lb = wfGetLB();

            $i = $lb->getReaderIndex();

            $host = $lb->getServerName( $i );

        }

        $this->output( "$host\n" );

    }


}


$maintClass = "GetSlaveServer";

require_once RUN_MAINTENANCE_IF_MAIN;

$wgAllDBsAreLocalhost
$wgAllDBsAreLocalhost
Make all database connections secretly go to localhost.
Definition DefaultSettings.php:1832

wfGetLB
wfGetLB( $wiki=false)
Get a load balancer object.
Definition GlobalFunctions.php:3166

$i
$i
Definition Parser.php:1694

GetSlaveServer
Maintenance script that reports the hostname of a slave server.
Definition getSlaveServer.php:31

GetSlaveServer\__construct
__construct()
Default constructor.
Definition getSlaveServer.php:32

GetSlaveServer\execute
execute()
Do the actual work.
Definition getSlaveServer.php:38

Maintenance
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition maintenance.txt:39

Maintenance\getDB
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
Definition Maintenance.php:1154

Maintenance\hasOption
hasOption( $name)
Checks to see if a particular param exists.
Definition Maintenance.php:226

Maintenance\addDescription
addDescription( $text)
Set the description text.
Definition Maintenance.php:277

Maintenance\addOption
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
Definition Maintenance.php:205

Maintenance\getOption
getOption( $name, $default=null)
Get an option, or return the default.
Definition Maintenance.php:240

output
design txt This is a brief overview of the new design More thorough and up to date information is available on the documentation wiki at etc Handles the details of getting and saving to the user table of the and dealing with sessions and cookies OutputPage Encapsulates the entire HTML page that will be sent in response to any server request It is used by calling its functions to add in any and then calling output() to send it all. It could be easily changed to send incrementally if that becomes useful

global
when a variable name is used in a it is silently declared as a new local masking the global
Definition design.txt:95

$maintClass
$maintClass
Definition getSlaveServer.php:54

DB_SLAVE
const DB_SLAVE
Definition Defines.php:47

php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition injection.txt:37

RUN_MAINTENANCE_IF_MAIN
require_once RUN_MAINTENANCE_IF_MAIN
Definition maintenance.txt:50