75 lines
1.5 KiB
PHP
75 lines
1.5 KiB
PHP
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<?php
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namespace App\Cache\Repository;
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use App\Cache\Contracts\LockRedisInterface;
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/**
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* Redis Lock
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*
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* @package App\Cache\Repository
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*/
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class LockRedis implements LockRedisInterface
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{
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use RedisTrait;
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private $prefix = 'rds:lock';
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private $lockValue = 1;
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/**
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* 获取是毫秒时间戳
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*
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* @return int
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*/
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private function time()
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{
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return intval(microtime(true) * 1000);
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}
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/**
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* 获取 Redis 锁
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*
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* @param string $key 锁标识
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* @param int $lockTime 过期时间/秒
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* @param int $timeout 获取超时/毫秒
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* @return bool
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*/
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public function lock(string $key, $lockTime = 1, $timeout = 0)
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{
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$lockName = $this->getCacheKey($key);
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$start = $this->time();
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do {
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$lock = $this->redis()->set($lockName, $this->lockValue, ['nx', 'ex' => $lockTime]);
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if ($lock || $timeout === 0) {
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break;
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}
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// 默认 0.1 秒一次取锁
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usleep(100000);
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} while ($this->time() < $start + $timeout);
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return $lock;
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}
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/**
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* 释放 Redis 锁
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*
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* @param string $key
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* @return mixed
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*/
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public function delete(string $key)
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{
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$script = <<<LAU
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if redis.call("GET", KEYS[1]) == ARGV[1] then
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return redis.call("DEL", KEYS[1])
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else
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return 0
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end
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LAU;
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return $this->redis()->eval($script, [$this->getCacheKey($key), $this->lockValue,], 1);
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}
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}
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