malkusch\lock\mutex\RedisMutex::acquire PHP Method

    protected function acquire($key, $expire)
    {
        // 1. This differs from the specification to avoid an overflow on 32-Bit systems.
        $time = microtime(true);
        // 2.
        $acquired = 0;
        $errored = 0;
        $this->token = rand();
        $exception = null;
        foreach ($this->redisAPIs as $redis) {
            try {
                if ($this->add($redis, $key, $this->token, $expire)) {
                    $acquired++;
                }
            } catch (LockAcquireException $exception) {
                $context = ["key" => $key, "token" => $this->token, "redis" => $this->getRedisIdentifier($redis), "exception" => $exception];
                $this->logger->warning("Could not set {key} = {token} at {redis}.", $context);
                $errored++;
            }
        }
        // 3.
        $elapsedTime = microtime(true) - $time;
        $isAcquired = $this->isMajority($acquired) && $elapsedTime <= $expire;
        if ($isAcquired) {
            // 4.
            return true;
        } else {
            // 5.
            $this->release($key);
            // In addition to RedLock it's an exception if too many servers fail.
            if (!$this->isMajority(count($this->redisAPIs) - $errored)) {
                assert(!is_null($exception));
                // The last exception for some context.
                throw new LockAcquireException("It's not possible to acquire a lock because at least half of the Redis server are not available.", LockAcquireException::REDIS_NOT_ENOUGH_SERVERS, $exception);
            }
            return false;
        }
    }