1 <?php
  2 /**
  3  * Cross - a micro PHP 5 framework
  4  *
  5  * @link        http://www.crossphp.com
  6  * @license     MIT License
  7  */
  8 
  9 namespace Cross\Cache\Request;
 10 
 11 use Cross\Cache\Driver\FileCacheDriver;
 12 use Cross\Exception\CoreException;
 13 use Cross\I\RequestCacheInterface;
 14 
 15 /**
 16  * @author wonli <wonli@live.com>
 17  *
 18  * Class FileCache
 19  * @package Cross\Cache\Request
 20  */
 21 class FileCache implements RequestCacheInterface
 22 {
 23     /**
 24      * @var string
 25      */
 26     private $cacheKey;
 27 
 28     /**
 29      * @var string
 30      */
 31     private $cachePath;
 32 
 33     /**
 34      * @var array
 35      */
 36     private $config;
 37 
 38     /**
 39      * 缓存过期时间(秒)
 40      *
 41      * @var int
 42      */
 43     private $expireTime = 3600;
 44 
 45     /**
 46      * @var FileCacheDriver
 47      */
 48     private $driver;
 49 
 50     /**
 51      * FileCache constructor.
 52      * 
 53      * @param array $config
 54      * @throws CoreException
 55      */
 56     function __construct(array $config)
 57     {
 58         if (!isset($config['cache_path'])) {
 59             throw new CoreException('请指定缓存目录');
 60         }
 61 
 62         if (!isset($config['key'])) {
 63             throw new CoreException('请指定缓存KEY');
 64         }
 65 
 66         if (isset($config['expire_time'])) {
 67             $this->expireTime = &$config['expire_time'];
 68         }
 69 
 70         $this->cacheKey = &$config['key'];
 71 
 72         $this->cachePath = rtrim($config['cache_path'], DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
 73         $this->driver = new FileCacheDriver($this->cachePath);
 74     }
 75 
 76     /**
 77      * 写入缓存
 78      *
 79      * @param string $value
 80      * @throws CoreException
 81      */
 82     function set($value)
 83     {
 84         $this->driver->set($this->cacheKey, $value);
 85     }
 86 
 87     /**
 88      * 获取缓存内容
 89      *
 90      * @return mixed get cache
 91      */
 92     function get()
 93     {
 94         return $this->driver->get($this->cacheKey);
 95     }
 96 
 97     /**
 98      * 是否有效
 99      *
100      * @return bool
101      */
102     function isValid()
103     {
104         $cacheFile = $this->cachePath . $this->cacheKey;
105         if (!file_exists($cacheFile)) {
106             return false;
107         }
108 
109         if ((time() - filemtime($cacheFile)) < $this->expireTime) {
110             return true;
111         }
112 
113         return false;
114     }
115 
116     /**
117      * 缓存配置
118      *
119      * @param array $config
120      */
121     function setConfig(array $config = array())
122     {
123         $this->config = $config;
124     }
125 
126     /**
127      * 获取缓存配置
128      *
129      * @return mixed
130      */
131     function getConfig()
132     {
133         return $this->config;
134     }
135 }
136 

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