96 lines
2.3 KiB
PHP
96 lines
2.3 KiB
PHP
<?php
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namespace App\Cache\Repository;
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use App\Cache\Contracts\LockRedisInterface;
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use App\Traits\StaticInstance;
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use Swoole\Coroutine;
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use Exception;
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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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final class LockRedis extends AbstractRedis implements LockRedisInterface
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{
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protected $prefix = 'rds-lock';
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protected $value = 1;
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use StaticInstance;
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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 $expired 过期时间/秒
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* @param int $timeout 获取超时/秒，默认每隔 0.1 秒获取一次锁
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* @return bool
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*/
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public function lock(string $key, $expired = 1, int $timeout = 0)
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{
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$lockName = $this->getCacheKey($key);
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// 重复获取次数
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$retry = $timeout > 0 ? intdiv($timeout * 100, 10) : 1;
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do {
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$lock = $this->redis()->set($lockName, $this->value, ['nx', 'ex' => $expired]);
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if ($lock || $timeout === 0) {
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break;
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}
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// 默认 0.1 秒一次取锁
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Coroutine::getCid() ? Coroutine::sleep(0.1) : usleep(100000);
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$retry--;
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} while ($retry);
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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->value], 1);
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}
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/**
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* 获取锁并执行
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*
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* @param \Closure $closure 闭包函数
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* @param string $lock_name 锁名
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* @param int $expired 过期时间/秒
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* @param int $timeout 获取超时/秒
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* @return bool
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* @throws Exception
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*/
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public function try(\Closure $closure, string $lock_name, int $expired = 1, int $timeout = 0)
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{
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if (!$this->lock($lock_name, $expired, $timeout)) return false;
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try {
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call_user_func($closure);
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} catch (Exception $e) {
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throw $e;
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} finally {
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$this->delete($lock_name);
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}
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return true;
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}
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}
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