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<?php namespace Illuminate\Cache; use Illuminate\Redis\Connections\PhpRedisConnection; use Redis; use UnexpectedValueException; class PhpRedisLock extends RedisLock { /** * Create a new phpredis lock instance. * * @param \Illuminate\Redis\Connections\PhpRedisConnection $redis * @param string $name * @param int $seconds * @param string|null $owner * @return void */ public function __construct(PhpRedisConnection $redis, string $name, int $seconds, ?string $owner = null) { parent::__construct($redis, $name, $seconds, $owner); } /** * {@inheritDoc} */ public function release() { return (bool) $this->redis->eval( LuaScripts::releaseLock(), 1, $this->name, $this->serializedAndCompressedOwner() ); } /** * Get the owner key, serialized and compressed. * * @return string * * @throws \UnexpectedValueException */ protected function serializedAndCompressedOwner(): string { $client = $this->redis->client(); $owner = $client->_serialize($this->owner); // https://github.com/phpredis/phpredis/issues/1938 if ($this->compressed()) { if ($this->lzfCompressed()) { $owner = \lzf_compress($owner); } elseif ($this->zstdCompressed()) { $owner = \zstd_compress($owner, $client->getOption(Redis::OPT_COMPRESSION_LEVEL)); } elseif ($this->lz4Compressed()) { $owner = \lz4_compress($owner, $client->getOption(Redis::OPT_COMPRESSION_LEVEL)); } else { throw new UnexpectedValueException(sprintf( 'Unknown phpredis compression in use [%d]. Unable to release lock.', $client->getOption(Redis::OPT_COMPRESSION) )); } } return $owner; } /** * Determine if compression is enabled. * * @return bool */ protected function compressed(): bool { return $this->redis->client()->getOption(Redis::OPT_COMPRESSION) !== Redis::COMPRESSION_NONE; } /** * Determine if LZF compression is enabled. * * @return bool */ protected function lzfCompressed(): bool { return defined('Redis::COMPRESSION_LZF') && $this->redis->client()->getOption(Redis::OPT_COMPRESSION) === Redis::COMPRESSION_LZF; } /** * Determine if ZSTD compression is enabled. * * @return bool */ protected function zstdCompressed(): bool { return defined('Redis::COMPRESSION_ZSTD') && $this->redis->client()->getOption(Redis::OPT_COMPRESSION) === Redis::COMPRESSION_ZSTD; } /** * Determine if LZ4 compression is enabled. * * @return bool */ protected function lz4Compressed(): bool { return defined('Redis::COMPRESSION_LZ4') && $this->redis->client()->getOption(Redis::OPT_COMPRESSION) === Redis::COMPRESSION_LZ4; } }