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CDBMessageIndex.php
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CDBMessageIndex.php
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<?php
declare( strict_types = 1 );
namespace MediaWiki\Extension\Translate\MessageLoading;
use Cdb\Reader;
use Cdb\Writer;
use MediaWiki\Extension\Translate\Utilities\Utilities;
/**
* Storage on CDB files.
*
* This is improved version of SerializedMessageIndex. It uses CDB files
* for storage, which means it provides random access. The CDB files are
* about double the size of serialized files (~7M for 50000 keys).
*
* Loading the whole index is slower than serialized, but about the same
* as for database. Suitable for single-server setups where
* SerializedMessageIndex is too slow for loading the whole index.
*/
class CDBMessageIndex extends MessageIndexStore {
private ?array $index = null;
private ?Reader $reader = null;
private const FILENAME = 'translate_messageindex.cdb';
public function retrieve( bool $readLatest = false ): array {
$reader = $this->getReader();
if ( $this->index !== null ) {
return $this->index;
}
$this->index = [];
foreach ( $this->getKeys() as $key ) {
$this->index[$key] = $this->unserialize( $reader->get( $key ) );
}
return $this->index;
}
public function getKeys(): array {
$reader = $this->getReader();
$keys = [];
$key = $reader->firstkey();
while ( $key !== false ) {
$keys[] = $key;
$key = $reader->nextkey();
}
return $keys;
}
/** @inheritDoc */
public function get( string $key ) {
$reader = $this->getReader();
// We might have the full cache loaded
if ( $this->index !== null ) {
return $this->index[$key] ?? null;
}
$value = $reader->get( $key );
return is_string( $value ) ? $this->unserialize( $value ) : null;
}
/** @inheritDoc */
public function store( array $array, array $diff ): void {
$this->reader = null;
$file = Utilities::cacheFile( self::FILENAME );
$cache = Writer::open( $file );
foreach ( $array as $key => $value ) {
$value = $this->serialize( $value );
$cache->set( $key, $value );
}
$cache->close();
$this->index = $array;
}
private function getReader() {
if ( $this->reader ) {
return $this->reader;
}
$file = Utilities::cacheFile( self::FILENAME );
if ( !file_exists( $file ) ) {
// Create an empty index
$this->store( [], [] );
}
$this->reader = Reader::open( $file );
return $this->reader;
}
}

File Metadata

Mime Type
text/x-php
Expires
Tue, Aug 18, 16:59 (3 w, 4 d ago)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
cf/d7/2f2e9da21dfc44357be78e81e347
Default Alt Text
CDBMessageIndex.php (2 KB)

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