MediaWiki  master
DeleteLinksJob.php
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1 <?php
25 
34 class DeleteLinksJob extends Job {
36  parent::__construct( 'deleteLinks', $title, $params );
37  $this->removeDuplicates = true;
38  }
39 
40  function run() {
41  if ( is_null( $this->title ) ) {
42  $this->setLastError( "deleteLinks: Invalid title" );
43  return false;
44  }
45 
46  $pageId = $this->params['pageId'];
47 
48  // Serialize links updates by page ID so they see each others' changes
49  $scopedLock = LinksUpdate::acquirePageLock( wfGetDB( DB_MASTER ), $pageId, 'job' );
50  if ( $scopedLock === null ) {
51  $this->setLastError( 'LinksUpdate already running for this page, try again later.' );
52  return false;
53  }
54 
55  if ( WikiPage::newFromID( $pageId, WikiPage::READ_LATEST ) ) {
56  // The page was restored somehow or something went wrong
57  $this->setLastError( "deleteLinks: Page #$pageId exists" );
58  return false;
59  }
60 
61  $factory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
62  $timestamp = $this->params['timestamp'] ?? null;
63  $page = WikiPage::factory( $this->title ); // title when deleted
64 
65  $update = new LinksDeletionUpdate( $page, $pageId, $timestamp );
66  $update->setTransactionTicket( $factory->getEmptyTransactionTicket( __METHOD__ ) );
67  $update->doUpdate();
68 
69  return true;
70  }
71 }
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("192.168.0.1:11211", 2))
static factory(Title $title)
Create a WikiPage object of the appropriate class for the given title.
Definition: WikiPage.php:138
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
run()
Run the job.
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
Class to both describe a background job and handle jobs.
Definition: Job.php:30
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 MediaWikiServices
Definition: injection.txt:23
title
const DB_MASTER
Definition: defines.php:26
setLastError( $error)
Definition: Job.php:451
__construct(Title $title, array $params)
static acquirePageLock(IDatabase $dbw, $pageId, $why='atomicity')
Acquire a lock for performing link table updates for a page on a DB.
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:780
Job to prune link tables for pages that were deleted.
static newFromID( $id, $from='fromdb')
Constructor from a page id.
Definition: WikiPage.php:176
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:35
array $params
Array of job parameters.
Definition: Job.php:35
Title $title
Definition: Job.php:41