silverstripe-versionfeed/code/caching/ContentFilter.php
Damian Mooyman 4d278f1695 API Add cache_lifetime config
BUG Fix issue in test caching
Tests for 3.2 and php 5.6
2015-11-02 11:27:14 +13:00

60 lines
1.3 KiB
PHP

<?php
namespace VersionFeed\Filters;
/**
* Conditionally executes a given callback, attempting to return the desired results
* of its execution.
*/
abstract class ContentFilter {
/**
* Nested content filter
*
* @var ContentFilter
*/
protected $nestedContentFilter;
/**
* Cache lifetime
*
* @config
* @var int
*/
private static $cache_lifetime = 300;
public function __construct($nestedContentFilter = null) {
$this->nestedContentFilter = $nestedContentFilter;
}
/**
* Gets the cache to use
*
* @return Zend_Cache_Frontend
*/
protected function getCache() {
$cache = \SS_Cache::factory('VersionFeed_Controller');
$cache->setOption('automatic_serialization', true);
// Map 0 to null for unlimited lifetime
$lifetime = \Config::inst()->get(get_class($this), 'cache_lifetime') ?: null;
$cache->setLifetime($lifetime);
return $cache;
}
/**
* Evaluates the result of the given callback
*
* @param string $key Unique key for this
* @param callable $callback Callback for evaluating the content
* @return mixed Result of $callback()
*/
public function getContent($key, $callback) {
if($this->nestedContentFilter) {
return $this->nestedContentFilter->getContent($key, $callback);
} else {
return call_user_func($callback);
}
}
}