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<?php
namespace Wikimedia\ObjectCache\Serialized;
use stdClass;
/**
* Helper class for segmenting large cache values without relying
* on serializing classes.
*
* @since 1.34
* @ingroup Cache
*/
class SerializedValueContainer {
private const SCHEMA = '__svc_schema__';
// 64 bit UID
private const SCHEMA_SEGMENTED = 'CAYCDAgCDw4';
public const SEGMENTED_HASHES = '__hashes__';
/**
* @param string[] $segmentHashList Ordered list of hashes for each segment
* @return stdClass
*/
public static function newSegmented( array $segmentHashList ) {
return (object)[
self::SCHEMA => self::SCHEMA_SEGMENTED,
self::SEGMENTED_HASHES => $segmentHashList
];
}
/**
* @param mixed $value
* @return bool
*/
public static function isSegmented( $value ): bool {
return (
$value instanceof stdClass &&
( $value->{self::SCHEMA} ?? null ) === self::SCHEMA_SEGMENTED
);
}
}
/** @deprecated class alias since 1.43 */
class_alias( SerializedValueContainer::class, 'SerializedValueContainer' );
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