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