基于php的雪花算法(snowflake) PHP

$this->maxWorkerId || $workerId < 0) { throw new Exception("worker Id can't be greater than {$this->maxWorkerId} or less than 0"); }if ($datacenterId > $this->maxDatacenterId || $datacenterId < 0) { throw new Exception("datacenter Id can't be greater than {$this->maxDatacenterId} or less than 0"); }$this->workerId= $workerId; $this->datacenterId = $datacenterId; $this->sequence= $sequence; }public function nextId() { $timestamp = $this->timeGen(); if ($timestamp < $this->lastTimestamp) { $diffTimestamp = bcsub($this->lastTimestamp, $timestamp); throw new Exception("Clock moved backwards.Refusing to generate id for {$diffTimestamp} milliseconds"); }if ($this->lastTimestamp == $timestamp) { $this->sequence = ($this->sequence + 1) & $this->sequenceMask; if (0 == $this->sequence) { $timestamp = $this->tilNextMillis($this->lastTimestamp); } } else { $this->sequence = 0; }$this->lastTimestamp = $timestamp; /*$gmpTimestamp= gmp_init($this->leftShift(bcsub($timestamp, self::TWEPOCH), $this->timestampLeftShift)); $gmpDatacenterId = gmp_init($this->leftShift($this->datacenterId, $this->datacenterIdShift)); $gmpWorkerId= gmp_init($this->leftShift($this->workerId, $this->workerIdShift)); $gmpSequence= gmp_init($this->sequence); return gmp_strval(gmp_or(gmp_or(gmp_or($gmpTimestamp, $gmpDatacenterId), $gmpWorkerId), $gmpSequence)); */return (($timestamp - self::TWEPOCH) << $this->timestampLeftShift) | ($this->datacenterId << $this->datacenterIdShift) | ($this->workerId << $this->workerIdShift) | $this->sequence; }protected function tilNextMillis($lastTimestamp) { $timestamp = $this->timeGen(); while ($timestamp <= $lastTimestamp) { $timestamp = $this->timeGen(); }return $timestamp; }protected function timeGen() { return floor(microtime(true) * 1000); }// 左移 << protected function leftShift($a, $b) { return bcmul($a, bcpow(2, $b)); } }

【基于php的雪花算法(snowflake)】

基于php的雪花算法(snowflake)

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