www.gusucode.com > Aycms自媒体建站系统PHP版 v1.0.1源码程序 > Aycms_v1.0.1/vendor/thinkphp/library/think/cache/Driver.php
<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\cache;
use think\Container;
/**
* 缓存基础类
*/
abstract class Driver
{
/**
* 驱动句柄
* @var object
*/
protected $handler = null;
/**
* 缓存读取次数
* @var integer
*/
protected $readTimes = 0;
/**
* 缓存写入次数
* @var integer
*/
protected $writeTimes = 0;
/**
* 缓存参数
* @var array
*/
protected $options = [];
/**
* 缓存标签
* @var string
*/
protected $tag;
/**
* 序列化方法
* @var array
*/
protected static $serialize = ['serialize', 'unserialize', 'think_serialize:', 16];
/**
* 判断缓存是否存在
* @access public
* @param string $name 缓存变量名
* @return bool
*/
abstract public function has($name);
/**
* 读取缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $default 默认值
* @return mixed
*/
abstract public function get($name, $default = false);
/**
* 写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param int $expire 有效时间 0为永久
* @return boolean
*/
abstract public function set($name, $value, $expire = null);
/**
* 自增缓存（针对数值缓存）
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
abstract public function inc($name, $step = 1);
/**
* 自减缓存（针对数值缓存）
* @access public
* @param string $name 缓存变量名
* @param int $step 步长
* @return false|int
*/
abstract public function dec($name, $step = 1);
/**
* 删除缓存
* @access public
* @param string $name 缓存变量名
* @return boolean
*/
abstract public function rm($name);
/**
* 清除缓存
* @access public
* @param string $tag 标签名
* @return boolean
*/
abstract public function clear($tag = null);
/**
* 获取有效期
* @access protected
* @param integer|\DateTime $expire 有效期
* @return integer
*/
protected function getExpireTime($expire)
{
if ($expire instanceof \DateTime) {
$expire = $expire->getTimestamp() - time();
}
return $expire;
}
/**
* 获取实际的缓存标识
* @access protected
* @param string $name 缓存名
* @return string
*/
protected function getCacheKey($name)
{
return $this->options['prefix'] . $name;
}
/**
* 读取缓存并删除
* @access public
* @param string $name 缓存变量名
* @return mixed
*/
public function pull($name)
{
$result = $this->get($name, false);
if ($result) {
$this->rm($name);
return $result;
} else {
return;
}
}
/**
* 如果不存在则写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param int $expire 有效时间 0为永久
* @return mixed
*/
public function remember($name, $value, $expire = null)
{
if (!$this->has($name)) {
$time = time();
while ($time + 5 > time() && $this->has($name . '_lock')) {
// 存在锁定则等待
usleep(200000);
}
try {
// 锁定
$this->set($name . '_lock', true);
if ($value instanceof \Closure) {
// 获取缓存数据
$value = Container::getInstance()->invokeFunction($value);
}
// 缓存数据
$this->set($name, $value, $expire);
// 解锁
$this->rm($name . '_lock');
} catch (\Exception $e) {
$this->rm($name . '_lock');
throw $e;
} catch (\throwable $e) {
$this->rm($name . '_lock');
throw $e;
}
} else {
$value = $this->get($name);
}
return $value;
}
/**
* 缓存标签
* @access public
* @param string $name 标签名
* @param string|array $keys 缓存标识
* @param bool $overlay 是否覆盖
* @return $this
*/
public function tag($name, $keys = null, $overlay = false)
{
if (is_null($name)) {
} elseif (is_null($keys)) {
$this->tag = $name;
} else {
$key = $this->getTagkey($name);
if (is_string($keys)) {
$keys = explode(',', $keys);
}
$keys = array_map([$this, 'getCacheKey'], $keys);
if ($overlay) {
$value = $keys;
} else {
$value = array_unique(array_merge($this->getTagItem($name), $keys));
}
$this->set($key, implode(',', $value), 0);
}
return $this;
}
/**
* 更新标签
* @access protected
* @param string $name 缓存标识
* @return void
*/
protected function setTagItem($name)
{
if ($this->tag) {
$key = $this->getTagkey($this->tag);
$this->tag = null;
if ($this->has($key)) {
$value = explode(',', $this->get($key));
$value[] = $name;
if (count($value) > 1000) {
array_shift($value);
}
$value = implode(',', array_unique($value));
} else {
$value = $name;
}
$this->set($key, $value, 0);
}
}
/**
* 获取标签包含的缓存标识
* @access protected
* @param string $tag 缓存标签
* @return array
*/
protected function getTagItem($tag)
{
$key = $this->getTagkey($tag);
$value = $this->get($key);
if ($value) {
return array_filter(explode(',', $value));
} else {
return [];
}
}
protected function getTagKey($tag)
{
return 'tag_' . md5($tag);
}
/**
* 序列化数据
* @access protected
* @param mixed $data
* @return string
*/
protected function serialize($data)
{
if (is_scalar($data) || !$this->options['serialize']) {
return $data;
}
$serialize = self::$serialize[0];
return self::$serialize[2] . $serialize($data);
}
/**
* 反序列化数据
* @access protected
* @param string $data
* @return mixed
*/
protected function unserialize($data)
{
if ($this->options['serialize'] && 0 === strpos($data, self::$serialize[2])) {
$unserialize = self::$serialize[1];
return $unserialize(substr($data, self::$serialize[3]));
} else {
return $data;
}
}
/**
* 注册序列化机制
* @access public
* @param callable $serialize 序列化方法
* @param callable $unserialize 反序列化方法
* @param string $prefix 序列化前缀标识
* @return $this
*/
public static function registerSerialize($serialize, $unserialize, $prefix = 'think_serialize:')
{
self::$serialize = [$serialize, $unserialize, $prefix, strlen($prefix)];
}
/**
* 返回句柄对象，可执行其它高级方法
*
* @access public
* @return object
*/
public function handler()
{
return $this->handler;
}
public function getReadTimes()
{
return $this->readTimes;
}
public function getWriteTimes()
{
return $this->writeTimes;
}
public function __call($method, $args)
{
return call_user_func_array([$this->handler, $method], $args);
}
}