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LCStoreCDB.php
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LCStoreCDB.php
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<?php
/**
* @license GPL-2.0-or-later
* @file
*/
use Cdb\Exception as CdbException;
use Cdb\Reader;
use Cdb\Writer;
/**
* LCStore implementation which stores data as a collection of CDB files.
*
* Profiling indicates that on Linux, this implementation outperforms MySQL if
* the directory is on a local filesystem and there is ample kernel cache
* space. The performance advantage is greater when the DBA extension is
* available than it is with the PHP port.
*
* See Cdb.php and https://cr.yp.to/cdb.html
*
* @ingroup Language
*/
class LCStoreCDB implements LCStore {
/** @var Reader[]|false[] */
private $readers;
/** @var Writer|null */
private $writer;
/** @var string|null Current language code */
private $currentLang;
/** @var string Cache directory */
private $directory;
public function __construct( array $conf = [] ) {
$this->directory = $conf['directory'];
}
/** @inheritDoc */
public function get( $code, $key ) {
if ( !isset( $this->readers[$code] ) ) {
$fileName = $this->getFileName( $code );
$this->readers[$code] = false;
if ( is_file( $fileName ) ) {
try {
$this->readers[$code] = Reader::open( $fileName );
} catch ( CdbException ) {
wfDebug( __METHOD__ . ": unable to open cdb file for reading" );
}
}
}
if ( !$this->readers[$code] ) {
return null;
} else {
$value = false;
try {
$value = $this->readers[$code]->get( $key );
} catch ( CdbException $e ) {
wfDebug( __METHOD__ . ": \Cdb\Exception caught, error message was "
. $e->getMessage() );
}
if ( $value === false ) {
return null;
}
return unserialize( $value );
}
}
/** @inheritDoc */
public function startWrite( $code ) {
if ( !is_dir( $this->directory ) && !wfMkdirParents( $this->directory, null, __METHOD__ ) ) {
throw new RuntimeException( "Unable to create the localisation store " .
"directory \"{$this->directory}\"" );
}
// Close reader to stop permission errors on write
if ( !empty( $this->readers[$code] ) ) {
$this->readers[$code]->close();
}
$this->writer = Writer::open( $this->getFileName( $code ) );
$this->currentLang = $code;
}
public function finishWrite() {
$this->writer->close();
$this->writer = null;
unset( $this->readers[$this->currentLang] );
$this->currentLang = null;
}
/** @inheritDoc */
public function set( $key, $value ) {
if ( $this->writer === null ) {
throw new LogicException( __CLASS__ . ': must call startWrite() before calling set()' );
}
$this->writer->set( $key, serialize( $value ) );
}
/**
* @param string|null $code
* @return string
*/
protected function getFileName( $code ) {
if ( strval( $code ) === '' || str_contains( $code, '/' ) ) {
throw new InvalidArgumentException( __METHOD__ . ": Invalid language \"$code\"" );
}
return "{$this->directory}/l10n_cache-$code.cdb";
}
}

File Metadata

Mime Type
text/x-php
Expires
Aug 16 2026, 00:46 (12 w, 2 d ago)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
04/a8/e171748edf732884fe9e94217282
Default Alt Text
LCStoreCDB.php (2 KB)

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