MediaWiki  master
CachingSiteStore.php
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1 <?php
2 
31 class CachingSiteStore implements SiteStore {
32 
36  private $sites = null;
37 
41  private $cacheKey;
42 
46  private $cacheTimeout;
47 
51  private $cache;
52 
56  private $siteStore;
57 
64  public function __construct(
67  $cacheKey = null,
68  $cacheTimeout = 3600
69  ) {
70  $this->siteStore = $siteStore;
71  $this->cache = $cache;
72  $this->cacheKey = $cacheKey;
73  $this->cacheTimeout = $cacheTimeout;
74  }
75 
90  private function getCacheKey() {
91  if ( $this->cacheKey === null ) {
92  $type = 'SiteList#' . SiteList::getSerialVersionId();
93  $this->cacheKey = $this->cache->makeKey( "sites/$type" );
94  }
95 
96  return $this->cacheKey;
97  }
98 
106  public function getSites() {
107  if ( $this->sites === null ) {
108  $this->sites = $this->cache->get( $this->getCacheKey() );
109 
110  if ( !is_object( $this->sites ) ) {
111  $this->sites = $this->siteStore->getSites();
112 
113  $this->cache->set( $this->getCacheKey(), $this->sites, $this->cacheTimeout );
114  }
115  }
116 
117  return $this->sites;
118  }
119 
129  public function getSite( $globalId ) {
130  $sites = $this->getSites();
131 
132  return $sites->hasSite( $globalId ) ? $sites->getSite( $globalId ) : null;
133  }
134 
144  public function saveSite( Site $site ) {
145  return $this->saveSites( [ $site ] );
146  }
147 
157  public function saveSites( array $sites ) {
158  if ( empty( $sites ) ) {
159  return true;
160  }
161 
162  $success = $this->siteStore->saveSites( $sites );
163 
164  // purge cache
165  $this->reset();
166 
167  return $success;
168  }
169 
178  public function reset() {
179  // purge cache
180  $this->cache->delete( $this->getCacheKey() );
181  $this->sites = null;
182  }
183 
193  public function clear() {
194  $this->reset();
195 
196  return $this->siteStore->clear();
197  }
198 
199 }
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))
hasSite( $globalSiteId)
Returns if the list contains the site with the provided global site identifier.
Definition: SiteList.php:140
$success
SiteList null $sites
saveSites(array $sites)
getCacheKey()
Constructs a cache key to use for caching the list of sites.
__construct(SiteStore $siteStore, BagOStuff $cache, $cacheKey=null, $cacheTimeout=3600)
you have access to all of the normal MediaWiki so you can get a DB use the cache
Definition: maintenance.txt:52
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
static getSerialVersionId()
Returns the version ID that identifies the serialization structure used by getSerializationData() and...
Definition: SiteList.php:310
reset()
Purges the internal and external cache of the site list, forcing the list.
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
Definition: Site.php:29
getSite( $globalSiteId)
Returns the Site with the provided global site identifier.
Definition: SiteList.php:154
string null $cacheKey
clear()
Clears the list of sites stored.