3 * Cache of the contents of localisation files.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
23 define( 'MW_LC_VERSION', 2 );
26 * Class for caching the contents of localisation files, Messages*.php
29 * An instance of this class is available using Language::getLocalisationCache().
31 * The values retrieved from here are merged, containing items from extension
32 * files, core messages files and the language fallback sequence (e.g. zh-cn ->
33 * zh-hans -> en ). Some common errors are corrected, for example namespace
34 * names with spaces instead of underscores, but heavyweight processing, such
35 * as grammatical transformation, is done by the caller.
37 class LocalisationCache
{
38 /** Configuration associative array */
42 * True if recaching should only be done on an explicit call to recache().
43 * Setting this reduces the overhead of cache freshness checking, which
44 * requires doing a stat() for every extension i18n file.
46 var $manualRecache = false;
49 * True to treat all files as expired until they are regenerated by this object.
51 var $forceRecache = false;
54 * The cache data. 3-d array, where the first key is the language code,
55 * the second key is the item key e.g. 'messages', and the third key is
56 * an item specific subkey index. Some items are not arrays and so for those
57 * items, there are no subkeys.
62 * The persistent store object. An instance of LCStore.
69 * A 2-d associative array, code/key, where presence indicates that the item
70 * is loaded. Value arbitrary.
72 * For split items, if set, this indicates that all of the subitems have been
75 var $loadedItems = array();
78 * A 3-d associative array, code/key/subkey, where presence indicates that
79 * the subitem is loaded. Only used for the split items, i.e. messages.
81 var $loadedSubitems = array();
84 * An array where presence of a key indicates that that language has been
85 * initialised. Initialisation includes checking for cache expiry and doing
86 * any necessary updates.
88 var $initialisedLangs = array();
91 * An array mapping non-existent pseudo-languages to fallback languages. This
92 * is filled by initShallowFallback() when data is requested from a language
93 * that lacks a Messages*.php file.
95 var $shallowFallbacks = array();
98 * An array where the keys are codes that have been recached by this instance.
100 var $recachedLangs = array();
105 static public $allKeys = array(
106 'fallback', 'namespaceNames', 'bookstoreList',
107 'magicWords', 'messages', 'rtl', 'capitalizeAllNouns', 'digitTransformTable',
108 'separatorTransformTable', 'fallback8bitEncoding', 'linkPrefixExtension',
109 'linkTrail', 'namespaceAliases',
110 'dateFormats', 'datePreferences', 'datePreferenceMigrationMap',
111 'defaultDateFormat', 'extraUserToggles', 'specialPageAliases',
112 'imageFiles', 'preloadedMessages', 'namespaceGenderAliases',
113 'digitGroupingPattern', 'pluralRules', 'pluralRuleTypes', 'compiledPluralRules',
117 * Keys for items which consist of associative arrays, which may be merged
118 * by a fallback sequence.
120 static public $mergeableMapKeys = array( 'messages', 'namespaceNames',
121 'dateFormats', 'imageFiles', 'preloadedMessages'
125 * Keys for items which are a numbered array.
127 static public $mergeableListKeys = array( 'extraUserToggles' );
130 * Keys for items which contain an array of arrays of equivalent aliases
131 * for each subitem. The aliases may be merged by a fallback sequence.
133 static public $mergeableAliasListKeys = array( 'specialPageAliases' );
136 * Keys for items which contain an associative array, and may be merged if
137 * the primary value contains the special array key "inherit". That array
138 * key is removed after the first merge.
140 static public $optionalMergeKeys = array( 'bookstoreList' );
143 * Keys for items that are formatted like $magicWords
145 static public $magicWordKeys = array( 'magicWords' );
148 * Keys for items where the subitems are stored in the backend separately.
150 static public $splitKeys = array( 'messages' );
153 * Keys which are loaded automatically by initLanguage()
155 static public $preloadedKeys = array( 'dateFormats', 'namespaceNames' );
158 * Associative array of cached plural rules. The key is the language code,
159 * the value is an array of plural rules for that language.
161 var $pluralRules = null;
164 * Associative array of cached plural rule types. The key is the language
165 * code, the value is an array of plural rule types for that language. For
166 * example, $pluralRuleTypes['ar'] = ['zero', 'one', 'two', 'few', 'many'].
167 * The index for each rule type matches the index for the rule in
168 * $pluralRules, thus allowing correlation between the two. The reason we
169 * don't just use the type names as the keys in $pluralRules is because
170 * Language::convertPlural applies the rules based on numeric order (or
171 * explicit numeric parameter), not based on the name of the rule type. For
172 * example, {{plural:count|wordform1|wordform2|wordform3}}, rather than
173 * {{plural:count|one=wordform1|two=wordform2|many=wordform3}}.
175 var $pluralRuleTypes = null;
177 var $mergeableKeys = null;
181 * For constructor parameters, see the documentation in DefaultSettings.php
182 * for $wgLocalisationCacheConf.
185 * @throws MWException
187 function __construct( $conf ) {
188 global $wgCacheDirectory;
191 $storeConf = array();
192 if ( !empty( $conf['storeClass'] ) ) {
193 $storeClass = $conf['storeClass'];
195 switch ( $conf['store'] ) {
198 $storeClass = 'LCStore_CDB';
201 $storeClass = 'LCStore_DB';
204 $storeClass = 'LCStore_Accel';
207 $storeClass = $wgCacheDirectory ?
'LCStore_CDB' : 'LCStore_DB';
210 throw new MWException(
211 'Please set $wgLocalisationCacheConf[\'store\'] to something sensible.' );
215 wfDebug( get_class( $this ) . ": using store $storeClass\n" );
216 if ( !empty( $conf['storeDirectory'] ) ) {
217 $storeConf['directory'] = $conf['storeDirectory'];
220 $this->store
= new $storeClass( $storeConf );
221 foreach ( array( 'manualRecache', 'forceRecache' ) as $var ) {
222 if ( isset( $conf[$var] ) ) {
223 $this->$var = $conf[$var];
229 * Returns true if the given key is mergeable, that is, if it is an associative
230 * array which can be merged through a fallback sequence.
234 public function isMergeableKey( $key ) {
235 if ( $this->mergeableKeys
=== null ) {
236 $this->mergeableKeys
= array_flip( array_merge(
237 self
::$mergeableMapKeys,
238 self
::$mergeableListKeys,
239 self
::$mergeableAliasListKeys,
240 self
::$optionalMergeKeys,
244 return isset( $this->mergeableKeys
[$key] );
250 * Warning: this may be slow for split items (messages), since it will
251 * need to fetch all of the subitems from the cache individually.
256 public function getItem( $code, $key ) {
257 if ( !isset( $this->loadedItems
[$code][$key] ) ) {
258 wfProfileIn( __METHOD__
. '-load' );
259 $this->loadItem( $code, $key );
260 wfProfileOut( __METHOD__
. '-load' );
263 if ( $key === 'fallback' && isset( $this->shallowFallbacks
[$code] ) ) {
264 return $this->shallowFallbacks
[$code];
267 return $this->data
[$code][$key];
271 * Get a subitem, for instance a single message for a given language.
277 public function getSubitem( $code, $key, $subkey ) {
278 if ( !isset( $this->loadedSubitems
[$code][$key][$subkey] ) &&
279 !isset( $this->loadedItems
[$code][$key] ) ) {
280 wfProfileIn( __METHOD__
. '-load' );
281 $this->loadSubitem( $code, $key, $subkey );
282 wfProfileOut( __METHOD__
. '-load' );
285 if ( isset( $this->data
[$code][$key][$subkey] ) ) {
286 return $this->data
[$code][$key][$subkey];
293 * Get the list of subitem keys for a given item.
295 * This is faster than array_keys($lc->getItem(...)) for the items listed in
298 * Will return null if the item is not found, or false if the item is not an
302 * @return bool|null|string
304 public function getSubitemList( $code, $key ) {
305 if ( in_array( $key, self
::$splitKeys ) ) {
306 return $this->getSubitem( $code, 'list', $key );
308 $item = $this->getItem( $code, $key );
309 if ( is_array( $item ) ) {
310 return array_keys( $item );
318 * Load an item into the cache.
322 protected function loadItem( $code, $key ) {
323 if ( !isset( $this->initialisedLangs
[$code] ) ) {
324 $this->initLanguage( $code );
327 // Check to see if initLanguage() loaded it for us
328 if ( isset( $this->loadedItems
[$code][$key] ) ) {
332 if ( isset( $this->shallowFallbacks
[$code] ) ) {
333 $this->loadItem( $this->shallowFallbacks
[$code], $key );
337 if ( in_array( $key, self
::$splitKeys ) ) {
338 $subkeyList = $this->getSubitem( $code, 'list', $key );
339 foreach ( $subkeyList as $subkey ) {
340 if ( isset( $this->data
[$code][$key][$subkey] ) ) {
343 $this->data
[$code][$key][$subkey] = $this->getSubitem( $code, $key, $subkey );
346 $this->data
[$code][$key] = $this->store
->get( $code, $key );
349 $this->loadedItems
[$code][$key] = true;
353 * Load a subitem into the cache
358 protected function loadSubitem( $code, $key, $subkey ) {
359 if ( !in_array( $key, self
::$splitKeys ) ) {
360 $this->loadItem( $code, $key );
364 if ( !isset( $this->initialisedLangs
[$code] ) ) {
365 $this->initLanguage( $code );
368 // Check to see if initLanguage() loaded it for us
369 if ( isset( $this->loadedItems
[$code][$key] ) ||
370 isset( $this->loadedSubitems
[$code][$key][$subkey] ) ) {
374 if ( isset( $this->shallowFallbacks
[$code] ) ) {
375 $this->loadSubitem( $this->shallowFallbacks
[$code], $key, $subkey );
379 $value = $this->store
->get( $code, "$key:$subkey" );
380 $this->data
[$code][$key][$subkey] = $value;
381 $this->loadedSubitems
[$code][$key][$subkey] = true;
385 * Returns true if the cache identified by $code is missing or expired.
387 * @param string $code
391 public function isExpired( $code ) {
392 if ( $this->forceRecache
&& !isset( $this->recachedLangs
[$code] ) ) {
393 wfDebug( __METHOD__
. "($code): forced reload\n" );
397 $deps = $this->store
->get( $code, 'deps' );
398 $keys = $this->store
->get( $code, 'list' );
399 $preload = $this->store
->get( $code, 'preload' );
400 // Different keys may expire separately, at least in LCStore_Accel
401 if ( $deps === null ||
$keys === null ||
$preload === null ) {
402 wfDebug( __METHOD__
. "($code): cache missing, need to make one\n" );
406 foreach ( $deps as $dep ) {
407 // Because we're unserializing stuff from cache, we
408 // could receive objects of classes that don't exist
409 // anymore (e.g. uninstalled extensions)
410 // When this happens, always expire the cache
411 if ( !$dep instanceof CacheDependency ||
$dep->isExpired() ) {
412 wfDebug( __METHOD__
. "($code): cache for $code expired due to " .
413 get_class( $dep ) . "\n" );
422 * Initialise a language in this object. Rebuild the cache if necessary.
424 * @throws MWException
426 protected function initLanguage( $code ) {
427 if ( isset( $this->initialisedLangs
[$code] ) ) {
431 $this->initialisedLangs
[$code] = true;
433 # If the code is of the wrong form for a Messages*.php file, do a shallow fallback
434 if ( !Language
::isValidBuiltInCode( $code ) ) {
435 $this->initShallowFallback( $code, 'en' );
439 # Recache the data if necessary
440 if ( !$this->manualRecache
&& $this->isExpired( $code ) ) {
441 if ( file_exists( Language
::getMessagesFileName( $code ) ) ) {
442 $this->recache( $code );
443 } elseif ( $code === 'en' ) {
444 throw new MWException( 'MessagesEn.php is missing.' );
446 $this->initShallowFallback( $code, 'en' );
452 $preload = $this->getItem( $code, 'preload' );
453 if ( $preload === null ) {
454 if ( $this->manualRecache
) {
455 // No Messages*.php file. Do shallow fallback to en.
456 if ( $code === 'en' ) {
457 throw new MWException( 'No localisation cache found for English. ' .
458 'Please run maintenance/rebuildLocalisationCache.php.' );
460 $this->initShallowFallback( $code, 'en' );
463 throw new MWException( 'Invalid or missing localisation cache.' );
466 $this->data
[$code] = $preload;
467 foreach ( $preload as $key => $item ) {
468 if ( in_array( $key, self
::$splitKeys ) ) {
469 foreach ( $item as $subkey => $subitem ) {
470 $this->loadedSubitems
[$code][$key][$subkey] = true;
473 $this->loadedItems
[$code][$key] = true;
479 * Create a fallback from one language to another, without creating a
480 * complete persistent cache.
481 * @param $primaryCode
482 * @param $fallbackCode
484 public function initShallowFallback( $primaryCode, $fallbackCode ) {
485 $this->data
[$primaryCode] =& $this->data
[$fallbackCode];
486 $this->loadedItems
[$primaryCode] =& $this->loadedItems
[$fallbackCode];
487 $this->loadedSubitems
[$primaryCode] =& $this->loadedSubitems
[$fallbackCode];
488 $this->shallowFallbacks
[$primaryCode] = $fallbackCode;
492 * Read a PHP file containing localisation data.
495 * @throws MWException
498 protected function readPHPFile( $_fileName, $_fileType ) {
499 wfProfileIn( __METHOD__
);
500 // Disable APC caching
501 $_apcEnabled = ini_set( 'apc.cache_by_default', '0' );
502 include( $_fileName );
503 ini_set( 'apc.cache_by_default', $_apcEnabled );
505 if ( $_fileType == 'core' ||
$_fileType == 'extension' ) {
506 $data = compact( self
::$allKeys );
507 } elseif ( $_fileType == 'aliases' ) {
508 $data = compact( 'aliases' );
510 wfProfileOut( __METHOD__
);
511 throw new MWException( __METHOD__
. ": Invalid file type: $_fileType" );
513 wfProfileOut( __METHOD__
);
518 * Get the compiled plural rules for a given language from the XML files.
521 public function getCompiledPluralRules( $code ) {
522 $rules = $this->getPluralRules( $code );
523 if ( $rules === null ) {
527 $compiledRules = CLDRPluralRuleEvaluator
::compile( $rules );
528 } catch( CLDRPluralRuleError
$e ) {
529 wfDebugLog( 'l10n', $e->getMessage() . "\n" );
532 return $compiledRules;
536 * Get the plural rules for a given language from the XML files.
540 public function getPluralRules( $code ) {
541 if ( $this->pluralRules
=== null ) {
542 $this->loadPluralFiles();
544 if ( !isset( $this->pluralRules
[$code] ) ) {
547 return $this->pluralRules
[$code];
552 * Get the plural rule types for a given language from the XML files.
556 public function getPluralRuleTypes( $code ) {
557 if ( $this->pluralRuleTypes
=== null ) {
558 $this->loadPluralFiles();
560 if ( !isset( $this->pluralRuleTypes
[$code] ) ) {
563 return $this->pluralRuleTypes
[$code];
568 * Load the plural XML files.
570 protected function loadPluralFiles() {
572 $cldrPlural = "$IP/languages/data/plurals.xml";
573 $mwPlural = "$IP/languages/data/plurals-mediawiki.xml";
574 // Load CLDR plural rules
575 $this->loadPluralFile( $cldrPlural );
576 if ( file_exists( $mwPlural ) ) {
577 // Override or extend
578 $this->loadPluralFile( $mwPlural );
583 * Load a plural XML file with the given filename, compile the relevant
584 * rules, and save the compiled rules in a process-local cache.
586 protected function loadPluralFile( $fileName ) {
587 $doc = new DOMDocument
;
588 $doc->load( $fileName );
589 $rulesets = $doc->getElementsByTagName( "pluralRules" );
590 foreach ( $rulesets as $ruleset ) {
591 $codes = $ruleset->getAttribute( 'locales' );
593 $ruleTypes = array();
594 $ruleElements = $ruleset->getElementsByTagName( "pluralRule" );
595 foreach ( $ruleElements as $elt ) {
596 $ruleType = $elt->getAttribute( 'count' );
597 $rules[] = $elt->nodeValue
;
598 $ruleTypes[] = $ruleType;
600 foreach ( explode( ' ', $codes ) as $code ) {
601 $this->pluralRules
[$code] = $rules;
602 $this->pluralRuleTypes
[$code] = $ruleTypes;
608 * Read the data from the source files for a given language, and register
609 * the relevant dependencies in the $deps array. If the localisation
610 * exists, the data array is returned, otherwise false is returned.
612 protected function readSourceFilesAndRegisterDeps( $code, &$deps ) {
615 wfProfileIn( __METHOD__
);
616 $fileName = Language
::getMessagesFileName( $code );
617 if ( !file_exists( $fileName ) ) {
621 $deps[] = new FileDependency( $fileName );
622 $data = $this->readPHPFile( $fileName, 'core' );
624 # Load CLDR plural rules for JavaScript
625 $data['pluralRules'] = $this->getPluralRules( $code );
627 $data['compiledPluralRules'] = $this->getCompiledPluralRules( $code );
628 # Load plural rule types
629 $data['pluralRuleTypes'] = $this->getPluralRuleTypes( $code );
631 $deps['plurals'] = new FileDependency( "$IP/languages/data/plurals.xml" );
632 $deps['plurals-mw'] = new FileDependency( "$IP/languages/data/plurals-mediawiki.xml" );
633 wfProfileOut( __METHOD__
);
639 * Merge two localisation values, a primary and a fallback, overwriting the
640 * primary value in place.
643 * @param $fallbackValue
645 protected function mergeItem( $key, &$value, $fallbackValue ) {
646 if ( !is_null( $value ) ) {
647 if ( !is_null( $fallbackValue ) ) {
648 if ( in_array( $key, self
::$mergeableMapKeys ) ) {
649 $value = $value +
$fallbackValue;
650 } elseif ( in_array( $key, self
::$mergeableListKeys ) ) {
651 $value = array_unique( array_merge( $fallbackValue, $value ) );
652 } elseif ( in_array( $key, self
::$mergeableAliasListKeys ) ) {
653 $value = array_merge_recursive( $value, $fallbackValue );
654 } elseif ( in_array( $key, self
::$optionalMergeKeys ) ) {
655 if ( !empty( $value['inherit'] ) ) {
656 $value = array_merge( $fallbackValue, $value );
659 if ( isset( $value['inherit'] ) ) {
660 unset( $value['inherit'] );
662 } elseif ( in_array( $key, self
::$magicWordKeys ) ) {
663 $this->mergeMagicWords( $value, $fallbackValue );
667 $value = $fallbackValue;
673 * @param $fallbackValue
675 protected function mergeMagicWords( &$value, $fallbackValue ) {
676 foreach ( $fallbackValue as $magicName => $fallbackInfo ) {
677 if ( !isset( $value[$magicName] ) ) {
678 $value[$magicName] = $fallbackInfo;
680 $oldSynonyms = array_slice( $fallbackInfo, 1 );
681 $newSynonyms = array_slice( $value[$magicName], 1 );
682 $synonyms = array_values( array_unique( array_merge(
683 $newSynonyms, $oldSynonyms ) ) );
684 $value[$magicName] = array_merge( array( $fallbackInfo[0] ), $synonyms );
690 * Given an array mapping language code to localisation value, such as is
691 * found in extension *.i18n.php files, iterate through a fallback sequence
692 * to merge the given data with an existing primary value.
694 * Returns true if any data from the extension array was used, false
696 * @param $codeSequence
699 * @param $fallbackValue
702 protected function mergeExtensionItem( $codeSequence, $key, &$value, $fallbackValue ) {
704 foreach ( $codeSequence as $code ) {
705 if ( isset( $fallbackValue[$code] ) ) {
706 $this->mergeItem( $key, $value, $fallbackValue[$code] );
715 * Load localisation data for a given language for both core and extensions
716 * and save it to the persistent cache store and the process cache
718 * @throws MWException
720 public function recache( $code ) {
721 global $wgExtensionMessagesFiles;
722 wfProfileIn( __METHOD__
);
725 throw new MWException( "Invalid language code requested" );
727 $this->recachedLangs
[$code] = true;
730 $initialData = array_combine(
732 array_fill( 0, count( self
::$allKeys ), null ) );
733 $coreData = $initialData;
736 # Load the primary localisation from the source file
737 $data = $this->readSourceFilesAndRegisterDeps( $code, $deps );
738 if ( $data === false ) {
739 wfDebug( __METHOD__
. ": no localisation file for $code, using fallback to en\n" );
740 $coreData['fallback'] = 'en';
742 wfDebug( __METHOD__
. ": got localisation for $code from source\n" );
744 # Merge primary localisation
745 foreach ( $data as $key => $value ) {
746 $this->mergeItem( $key, $coreData[$key], $value );
751 # Fill in the fallback if it's not there already
752 if ( is_null( $coreData['fallback'] ) ) {
753 $coreData['fallback'] = $code === 'en' ?
false : 'en';
755 if ( $coreData['fallback'] === false ) {
756 $coreData['fallbackSequence'] = array();
758 $coreData['fallbackSequence'] = array_map( 'trim', explode( ',', $coreData['fallback'] ) );
759 $len = count( $coreData['fallbackSequence'] );
761 # Ensure that the sequence ends at en
762 if ( $coreData['fallbackSequence'][$len - 1] !== 'en' ) {
763 $coreData['fallbackSequence'][] = 'en';
766 # Load the fallback localisation item by item and merge it
767 foreach ( $coreData['fallbackSequence'] as $fbCode ) {
768 # Load the secondary localisation from the source file to
769 # avoid infinite cycles on cyclic fallbacks
770 $fbData = $this->readSourceFilesAndRegisterDeps( $fbCode, $deps );
771 if ( $fbData === false ) {
775 foreach ( self
::$allKeys as $key ) {
776 if ( !isset( $fbData[$key] ) ) {
780 if ( is_null( $coreData[$key] ) ||
$this->isMergeableKey( $key ) ) {
781 $this->mergeItem( $key, $coreData[$key], $fbData[$key] );
787 $codeSequence = array_merge( array( $code ), $coreData['fallbackSequence'] );
789 # Load the extension localisations
790 # This is done after the core because we know the fallback sequence now.
791 # But it has a higher precedence for merging so that we can support things
792 # like site-specific message overrides.
793 wfProfileIn( __METHOD__
. '-extensions' );
794 $allData = $initialData;
795 foreach ( $wgExtensionMessagesFiles as $fileName ) {
796 $data = $this->readPHPFile( $fileName, 'extension' );
799 foreach ( $data as $key => $item ) {
800 if ( $this->mergeExtensionItem( $codeSequence, $key, $allData[$key], $item ) ) {
806 $deps[] = new FileDependency( $fileName );
810 # Merge core data into extension data
811 foreach ( $coreData as $key => $item ) {
812 $this->mergeItem( $key, $allData[$key], $item );
814 wfProfileOut( __METHOD__
. '-extensions' );
816 # Add cache dependencies for any referenced globals
817 $deps['wgExtensionMessagesFiles'] = new GlobalDependency( 'wgExtensionMessagesFiles' );
818 $deps['version'] = new ConstantDependency( 'MW_LC_VERSION' );
820 # Add dependencies to the cache entry
821 $allData['deps'] = $deps;
823 # Replace spaces with underscores in namespace names
824 $allData['namespaceNames'] = str_replace( ' ', '_', $allData['namespaceNames'] );
826 # And do the same for special page aliases. $page is an array.
827 foreach ( $allData['specialPageAliases'] as &$page ) {
828 $page = str_replace( ' ', '_', $page );
830 # Decouple the reference to prevent accidental damage
833 # If there were no plural rules, return an empty array
834 if ( $allData['pluralRules'] === null ) {
835 $allData['pluralRules'] = array();
837 if ( $allData['compiledPluralRules'] === null ) {
838 $allData['compiledPluralRules'] = array();
840 # If there were no plural rule types, return an empty array
841 if ( $allData['pluralRuleTypes'] === null ) {
842 $allData['pluralRuleTypes'] = array();
846 $allData['list'] = array();
847 foreach ( self
::$splitKeys as $key ) {
848 $allData['list'][$key] = array_keys( $allData[$key] );
851 wfRunHooks( 'LocalisationCacheRecache', array( $this, $code, &$allData ) );
853 if ( is_null( $allData['namespaceNames'] ) ) {
854 throw new MWException( __METHOD__
. ': Localisation data failed sanity check! ' .
855 'Check that your languages/messages/MessagesEn.php file is intact.' );
858 # Set the preload key
859 $allData['preload'] = $this->buildPreload( $allData );
861 # Save to the process cache and register the items loaded
862 $this->data
[$code] = $allData;
863 foreach ( $allData as $key => $item ) {
864 $this->loadedItems
[$code][$key] = true;
867 # Save to the persistent cache
868 wfProfileIn( __METHOD__
. '-write' );
869 $this->store
->startWrite( $code );
870 foreach ( $allData as $key => $value ) {
871 if ( in_array( $key, self
::$splitKeys ) ) {
872 foreach ( $value as $subkey => $subvalue ) {
873 $this->store
->set( "$key:$subkey", $subvalue );
876 $this->store
->set( $key, $value );
879 $this->store
->finishWrite();
880 wfProfileOut( __METHOD__
. '-write' );
882 # Clear out the MessageBlobStore
883 # HACK: If using a null (i.e. disabled) storage backend, we
884 # can't write to the MessageBlobStore either
885 if ( !$this->store
instanceof LCStore_Null
) {
886 MessageBlobStore
::clear();
889 wfProfileOut( __METHOD__
);
893 * Build the preload item from the given pre-cache data.
895 * The preload item will be loaded automatically, improving performance
896 * for the commonly-requested items it contains.
900 protected function buildPreload( $data ) {
901 $preload = array( 'messages' => array() );
902 foreach ( self
::$preloadedKeys as $key ) {
903 $preload[$key] = $data[$key];
906 foreach ( $data['preloadedMessages'] as $subkey ) {
907 if ( isset( $data['messages'][$subkey] ) ) {
908 $subitem = $data['messages'][$subkey];
912 $preload['messages'][$subkey] = $subitem;
919 * Unload the data for a given language from the object cache.
920 * Reduces memory usage.
923 public function unload( $code ) {
924 unset( $this->data
[$code] );
925 unset( $this->loadedItems
[$code] );
926 unset( $this->loadedSubitems
[$code] );
927 unset( $this->initialisedLangs
[$code] );
929 foreach ( $this->shallowFallbacks
as $shallowCode => $fbCode ) {
930 if ( $fbCode === $code ) {
931 $this->unload( $shallowCode );
939 public function unloadAll() {
940 foreach ( $this->initialisedLangs
as $lang => $unused ) {
941 $this->unload( $lang );
946 * Disable the storage backend
948 public function disableBackend() {
949 $this->store
= new LCStore_Null
;
950 $this->manualRecache
= false;
955 * Interface for the persistence layer of LocalisationCache.
957 * The persistence layer is two-level hierarchical cache. The first level
958 * is the language, the second level is the item or subitem.
960 * Since the data for a whole language is rebuilt in one operation, it needs
961 * to have a fast and atomic method for deleting or replacing all of the
962 * current data for a given language. The interface reflects this bulk update
963 * operation. Callers writing to the cache must first call startWrite(), then
964 * will call set() a couple of thousand times, then will call finishWrite()
965 * to commit the operation. When finishWrite() is called, the cache is
966 * expected to delete all data previously stored for that language.
968 * The values stored are PHP variables suitable for serialize(). Implementations
969 * of LCStore are responsible for serializing and unserializing.
974 * @param string $code Language code
975 * @param string $key Cache key
977 function get( $code, $key );
980 * Start a write transaction.
981 * @param string $code Language code
983 function startWrite( $code );
986 * Finish a write transaction.
988 function finishWrite();
991 * Set a key to a given value. startWrite() must be called before this
992 * is called, and finishWrite() must be called afterwards.
994 * @param mixed $value
996 function set( $key, $value );
1000 * LCStore implementation which uses PHP accelerator to store data.
1001 * This will work if one of XCache, WinCache or APC cacher is configured.
1002 * (See ObjectCache.php)
1004 class LCStore_Accel
implements LCStore
{
1008 public function __construct() {
1009 $this->cache
= wfGetCache( CACHE_ACCEL
);
1012 public function get( $code, $key ) {
1013 $k = wfMemcKey( 'l10n', $code, 'k', $key );
1014 $r = $this->cache
->get( $k );
1015 return $r === false ?
null : $r;
1018 public function startWrite( $code ) {
1019 $k = wfMemcKey( 'l10n', $code, 'l' );
1020 $keys = $this->cache
->get( $k );
1022 foreach ( $keys as $k ) {
1023 $this->cache
->delete( $k );
1026 $this->currentLang
= $code;
1027 $this->keys
= array();
1030 public function finishWrite() {
1031 if ( $this->currentLang
) {
1032 $k = wfMemcKey( 'l10n', $this->currentLang
, 'l' );
1033 $this->cache
->set( $k, array_keys( $this->keys
) );
1035 $this->currentLang
= null;
1036 $this->keys
= array();
1039 public function set( $key, $value ) {
1040 if ( $this->currentLang
) {
1041 $k = wfMemcKey( 'l10n', $this->currentLang
, 'k', $key );
1042 $this->keys
[$k] = true;
1043 $this->cache
->set( $k, $value );
1049 * LCStore implementation which uses the standard DB functions to store data.
1050 * This will work on any MediaWiki installation.
1052 class LCStore_DB
implements LCStore
{
1054 var $writesDone = false;
1061 var $readOnly = false;
1063 public function get( $code, $key ) {
1064 if ( $this->writesDone
) {
1065 $db = wfGetDB( DB_MASTER
);
1067 $db = wfGetDB( DB_SLAVE
);
1069 $row = $db->selectRow( 'l10n_cache', array( 'lc_value' ),
1070 array( 'lc_lang' => $code, 'lc_key' => $key ), __METHOD__
);
1072 return unserialize( $row->lc_value
);
1078 public function startWrite( $code ) {
1079 if ( $this->readOnly
) {
1084 throw new MWException( __METHOD__
. ": Invalid language \"$code\"" );
1087 $this->dbw
= wfGetDB( DB_MASTER
);
1089 $this->dbw
->begin( __METHOD__
);
1090 $this->dbw
->delete( 'l10n_cache', array( 'lc_lang' => $code ), __METHOD__
);
1091 } catch ( DBQueryError
$e ) {
1092 if ( $this->dbw
->wasReadOnlyError() ) {
1093 $this->readOnly
= true;
1094 $this->dbw
->rollback( __METHOD__
);
1101 $this->currentLang
= $code;
1102 $this->batch
= array();
1105 public function finishWrite() {
1106 if ( $this->readOnly
) {
1110 if ( $this->batch
) {
1111 $this->dbw
->insert( 'l10n_cache', $this->batch
, __METHOD__
);
1114 $this->dbw
->commit( __METHOD__
);
1115 $this->currentLang
= null;
1117 $this->batch
= array();
1118 $this->writesDone
= true;
1121 public function set( $key, $value ) {
1122 if ( $this->readOnly
) {
1126 if ( is_null( $this->currentLang
) ) {
1127 throw new MWException( __CLASS__
. ': must call startWrite() before calling set()' );
1130 $this->batch
[] = array(
1131 'lc_lang' => $this->currentLang
,
1133 'lc_value' => serialize( $value ) );
1135 if ( count( $this->batch
) >= 100 ) {
1136 $this->dbw
->insert( 'l10n_cache', $this->batch
, __METHOD__
);
1137 $this->batch
= array();
1143 * LCStore implementation which stores data as a collection of CDB files in the
1144 * directory given by $wgCacheDirectory. If $wgCacheDirectory is not set, this
1145 * will throw an exception.
1147 * Profiling indicates that on Linux, this implementation outperforms MySQL if
1148 * the directory is on a local filesystem and there is ample kernel cache
1149 * space. The performance advantage is greater when the DBA extension is
1150 * available than it is with the PHP port.
1152 * See Cdb.php and http://cr.yp.to/cdb.html
1154 class LCStore_CDB
implements LCStore
{
1155 var $readers, $writer, $currentLang, $directory;
1157 function __construct( $conf = array() ) {
1158 global $wgCacheDirectory;
1160 if ( isset( $conf['directory'] ) ) {
1161 $this->directory
= $conf['directory'];
1163 $this->directory
= $wgCacheDirectory;
1167 public function get( $code, $key ) {
1168 if ( !isset( $this->readers
[$code] ) ) {
1169 $fileName = $this->getFileName( $code );
1171 if ( !file_exists( $fileName ) ) {
1172 $this->readers
[$code] = false;
1174 $this->readers
[$code] = CdbReader
::open( $fileName );
1178 if ( !$this->readers
[$code] ) {
1181 $value = $this->readers
[$code]->get( $key );
1183 if ( $value === false ) {
1186 return unserialize( $value );
1190 public function startWrite( $code ) {
1191 if ( !file_exists( $this->directory
) ) {
1192 if ( !wfMkdirParents( $this->directory
, null, __METHOD__
) ) {
1193 throw new MWException( "Unable to create the localisation store " .
1194 "directory \"{$this->directory}\"" );
1198 // Close reader to stop permission errors on write
1199 if ( !empty( $this->readers
[$code] ) ) {
1200 $this->readers
[$code]->close();
1203 $this->writer
= CdbWriter
::open( $this->getFileName( $code ) );
1204 $this->currentLang
= $code;
1207 public function finishWrite() {
1209 $this->writer
->close();
1210 $this->writer
= null;
1211 unset( $this->readers
[$this->currentLang
] );
1212 $this->currentLang
= null;
1215 public function set( $key, $value ) {
1216 if ( is_null( $this->writer
) ) {
1217 throw new MWException( __CLASS__
. ': must call startWrite() before calling set()' );
1219 $this->writer
->set( $key, serialize( $value ) );
1222 protected function getFileName( $code ) {
1223 if ( strval( $code ) === '' ||
strpos( $code, '/' ) !== false ) {
1224 throw new MWException( __METHOD__
. ": Invalid language \"$code\"" );
1226 return "{$this->directory}/l10n_cache-$code.cdb";
1231 * Null store backend, used to avoid DB errors during install
1233 class LCStore_Null
implements LCStore
{
1234 public function get( $code, $key ) {
1238 public function startWrite( $code ) {}
1239 public function finishWrite() {}
1240 public function set( $key, $value ) {}
1244 * A localisation cache optimised for loading large amounts of data for many
1245 * languages. Used by rebuildLocalisationCache.php.
1247 class LocalisationCache_BulkLoad
extends LocalisationCache
{
1249 * A cache of the contents of data files.
1250 * Core files are serialized to avoid using ~1GB of RAM during a recache.
1252 var $fileCache = array();
1255 * Most recently used languages. Uses the linked-list aspect of PHP hashtables
1256 * to keep the most recently used language codes at the end of the array, and
1257 * the language codes that are ready to be deleted at the beginning.
1259 var $mruLangs = array();
1262 * Maximum number of languages that may be loaded into $this->data
1264 var $maxLoadedLangs = 10;
1269 * @return array|mixed
1271 protected function readPHPFile( $fileName, $fileType ) {
1272 $serialize = $fileType === 'core';
1273 if ( !isset( $this->fileCache
[$fileName][$fileType] ) ) {
1274 $data = parent
::readPHPFile( $fileName, $fileType );
1277 $encData = serialize( $data );
1282 $this->fileCache
[$fileName][$fileType] = $encData;
1285 } elseif ( $serialize ) {
1286 return unserialize( $this->fileCache
[$fileName][$fileType] );
1288 return $this->fileCache
[$fileName][$fileType];
1297 public function getItem( $code, $key ) {
1298 unset( $this->mruLangs
[$code] );
1299 $this->mruLangs
[$code] = true;
1300 return parent
::getItem( $code, $key );
1309 public function getSubitem( $code, $key, $subkey ) {
1310 unset( $this->mruLangs
[$code] );
1311 $this->mruLangs
[$code] = true;
1312 return parent
::getSubitem( $code, $key, $subkey );
1318 public function recache( $code ) {
1319 parent
::recache( $code );
1320 unset( $this->mruLangs
[$code] );
1321 $this->mruLangs
[$code] = true;
1328 public function unload( $code ) {
1329 unset( $this->mruLangs
[$code] );
1330 parent
::unload( $code );
1334 * Unload cached languages until there are less than $this->maxLoadedLangs
1336 protected function trimCache() {
1337 while ( count( $this->data
) > $this->maxLoadedLangs
&& count( $this->mruLangs
) ) {
1338 reset( $this->mruLangs
);
1339 $code = key( $this->mruLangs
);
1340 wfDebug( __METHOD__
. ": unloading $code\n" );
1341 $this->unload( $code );