153 lines
3.2 KiB
PHP
153 lines
3.2 KiB
PHP
<?php
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/**
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* @file src/Core/Cache.php
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*/
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namespace Friendica\Core;
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use Friendica\Core\Cache;
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use Friendica\Core\Config;
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/**
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* @brief Class for storing data for a short time
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*/
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class Cache extends \Friendica\BaseObject
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{
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const MONTH = 0;
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const WEEK = 1;
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const DAY = 2;
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const HOUR = 3;
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const HALF_HOUR = 4;
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const QUARTER_HOUR = 5;
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const FIVE_MINUTES = 6;
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const MINUTE = 7;
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/**
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* @var Cache\ICacheDriver
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*/
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static $driver = null;
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public static function init()
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{
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switch(Config::get('system', 'cache_driver', 'database')) {
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case 'memcache':
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$memcache_host = Config::get('system', 'memcache_host', '127.0.0.1');
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$memcache_port = Config::get('system', 'memcache_port', 11211);
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self::$driver = new Cache\MemcacheCacheDriver($memcache_host, $memcache_port);
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break;
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case 'memcached':
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$memcached_host = Config::get('system', 'memcached_host', '127.0.0.1');
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$memcached_port = Config::get('system', 'memcached_port', 11211);
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self::$driver = new Cache\MemcachedCacheDriver($memcached_host, $memcached_port);
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break;
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default:
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self::$driver = new Cache\DatabaseCacheDriver();
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}
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}
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/**
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* @brief Return the duration for a given cache level
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*
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* @param integer $level Cache level
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*
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* @return integer The cache duration in seconds
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*/
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public static function duration($level)
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{
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switch ($level) {
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case self::MONTH:
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$seconds = 2592000;
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break;
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case self::WEEK:
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$seconds = 604800;
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break;
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case self::DAY:
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$seconds = 86400;
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break;
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case self::HOUR:
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$seconds = 3600;
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break;
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case self::HALF_HOUR:
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$seconds = 1800;
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break;
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case self::QUARTER_HOUR:
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$seconds = 900;
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break;
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case self::FIVE_MINUTES:
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$seconds = 300;
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break;
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case self::MINUTE:
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default:
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$seconds = 60;
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break;
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}
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return $seconds;
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}
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/**
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* Returns the current cache driver
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*
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* @return Cache\ICacheDriver
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*/
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private static function getDriver()
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{
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if (self::$driver === null) {
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self::init();
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}
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return self::$driver;
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}
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/**
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* @brief Fetch cached data according to the key
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*
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* @param string $key The key to the cached data
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*
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* @return mixed Cached $value or "null" if not found
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*/
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public static function get($key)
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{
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$time = microtime(true);
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$return = self::getDriver()->get($key);
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self::getApp()->save_timestamp($time, 'cache');
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return $return;
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}
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/**
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* @brief Put data in the cache according to the key
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*
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* The input $value can have multiple formats.
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*
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* @param string $key The key to the cached data
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* @param mixed $value The value that is about to be stored
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* @param integer $duration The cache lifespan
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*
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* @return bool
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*/
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public static function set($key, $value, $duration = self::MONTH)
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{
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$time = microtime(true);
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$return = self::getDriver()->set($key, $value, $duration);
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self::getApp()->save_timestamp($time, 'cache_write');
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return $return;
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}
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/**
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* @brief Remove outdated data from the cache
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*
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* @param integer $max_level The maximum cache level that is to be cleared
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*
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* @return void
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*/
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public static function clear()
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{
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return self::getDriver()->clear();
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}
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}
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