81 lines
1.9 KiB
PHP
81 lines
1.9 KiB
PHP
<?php
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namespace SilverStripe\Core\Config;
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class Config_MemCache
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{
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protected $cache;
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protected $i = 0;
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protected $c = 0;
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protected $tags = array();
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public function __construct()
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{
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$this->cache = array();
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}
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public function set($key, $val, $tags = array())
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{
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foreach ($tags as $t) {
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if (!isset($this->tags[$t])) {
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$this->tags[$t] = array();
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}
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$this->tags[$t][$key] = true;
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}
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$this->cache[$key] = array($val, $tags);
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}
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private $hit = 0;
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private $miss = 0;
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public function stats()
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{
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return $this->miss ? ($this->hit / $this->miss) : 0;
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}
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public function get($key)
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{
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list($hit, $result) = $this->checkAndGet($key);
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return $hit ? $result : false;
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}
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/**
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* Checks for a cache hit and returns the value as a multi-value return
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*
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* @param string $key
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* @return array First element boolean, isHit. Second element the actual result.
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*/
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public function checkAndGet($key)
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{
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if (array_key_exists($key, $this->cache)) {
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++$this->hit;
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return array(true, $this->cache[$key][0]);
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} else {
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++$this->miss;
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return array(false, null);
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}
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}
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public function clean($tag = null)
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{
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if ($tag) {
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if (isset($this->tags[$tag])) {
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foreach ($this->tags[$tag] as $k => $dud) {
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// Remove the key from everywhere else it is tagged
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$ts = $this->cache[$k][1];
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foreach ($ts as $t) {
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unset($this->tags[$t][$k]);
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}
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unset($this->cache[$k]);
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}
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unset($this->tags[$tag]);
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}
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} else {
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$this->cache = array();
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$this->tags = array();
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}
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}
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}
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