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<?php
/**
* Copyright (c) 2012 Bart Visscher <bartv@thisnet.nl>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
class OC_Cache {
/**
* @var OC_Cache $user_cache
*/
static protected $user_cache;
/**
* @var OC_Cache $global_cache
*/
static protected $global_cache;
/**
* @var OC_Cache $global_cache_fast
*/
static protected $global_cache_fast;
/**
* @var OC_Cache $user_cache_fast
*/
static protected $user_cache_fast;
static protected $isFast=null;
/**
* get the global cache
* @return OC_Cache
*/
static public function getGlobalCache($fast=false) {
if (!self::$global_cache) {
self::$global_cache_fast = null;
if (!self::$global_cache_fast && function_exists('xcache_set')) {
self::$global_cache_fast = new OC_Cache_XCache(true);
}
if (!self::$global_cache_fast && function_exists('apc_store')) {
self::$global_cache_fast = new OC_Cache_APC(true);
}
self::$global_cache = new OC_Cache_FileGlobal();
if (self::$global_cache_fast) {
self::$global_cache = new OC_Cache_Broker(self::$global_cache_fast, self::$global_cache);
}
}
if($fast) {
if(self::$global_cache_fast) {
return self::$global_cache_fast;
}else{
return false;
}
}
return self::$global_cache;
}
/**
* get the user cache
* @return OC_Cache
*/
static public function getUserCache($fast=false) {
if (!self::$user_cache) {
self::$user_cache_fast = null;
if (!self::$user_cache_fast && function_exists('xcache_set')) {
self::$user_cache_fast = new OC_Cache_XCache();
}
if (!self::$user_cache_fast && function_exists('apc_store')) {
self::$user_cache_fast = new OC_Cache_APC();
}
self::$user_cache = new OC_Cache_File();
if (self::$user_cache_fast) {
self::$user_cache = new OC_Cache_Broker(self::$user_cache_fast, self::$user_cache);
}
}
if($fast) {
if(self::$user_cache_fast) {
return self::$user_cache_fast;
}else{
return false;
}
}
return self::$user_cache;
}
/**
* get a value from the user cache
* @return mixed
*/
static public function get($key) {
$user_cache = self::getUserCache();
return $user_cache->get($key);
}
/**
* set a value in the user cache
* @return bool
*/
static public function set($key, $value, $ttl=0) {
if (empty($key)) {
return false;
}
$user_cache = self::getUserCache();
return $user_cache->set($key, $value, $ttl);
}
/**
* check if a value is set in the user cache
* @return bool
*/
static public function hasKey($key) {
$user_cache = self::getUserCache();
return $user_cache->hasKey($key);
}
/**
* remove an item from the user cache
* @return bool
*/
static public function remove($key) {
$user_cache = self::getUserCache();
return $user_cache->remove($key);
}
/**
* clear the user cache of all entries starting with a prefix
* @param string prefix (optional)
* @return bool
*/
static public function clear($prefix='') {
$user_cache = self::getUserCache();
return $user_cache->clear($prefix);
}
/**
* check if a fast memory based cache is available
* @return true
*/
static public function isFast() {
if(is_null(self::$isFast)) {
self::$isFast=function_exists('xcache_set') || function_exists('apc_store');
}
return self::$isFast;
}
static public function generateCacheKeyFromFiles($files) {
$key = '';
sort($files);
foreach($files as $file) {
$stat = stat($file);
$key .= $file.$stat['mtime'].$stat['size'];
}
return md5($key);
}
}
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