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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Cache
* @subpackage Zend_Cache_Frontend
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Class.php 16541 2009-07-07 06:59:03Z bkarwin $
*/
/**
* @see Zend_Cache_Core
*/
require_once 'Zend/Cache/Core.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Frontend
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Frontend_Class extends Zend_Cache_Core
{
/**
* Available options
*
* ====> (mixed) cached_entity :
* - if set to a class name, we will cache an abstract class and will use only static calls
* - if set to an object, we will cache this object methods
*
* ====> (boolean) cache_by_default :
* - if true, method calls will be cached by default
*
* ====> (array) cached_methods :
* - an array of method names which will be cached (even if cache_by_default = false)
*
* ====> (array) non_cached_methods :
* - an array of method names which won't be cached (even if cache_by_default = true)
*
* @var array available options
*/
protected $_specificOptions = array(
'cached_entity' => null,
'cache_by_default' => true,
'cached_methods' => array(),
'non_cached_methods' => array()
);
/**
* Tags array
*
* @var array
*/
private $_tags = array();
/**
* SpecificLifetime value
*
* false => no specific life time
*
* @var int
*/
private $_specificLifetime = false;
/**
* The cached object or the name of the cached abstract class
*
* @var mixed
*/
private $_cachedEntity = null;
/**
* The class name of the cached object or cached abstract class
*
* Used to differentiate between different classes with the same method calls.
*
* @var string
*/
private $_cachedEntityLabel = '';
/**
* Priority (used by some particular backends)
*
* @var int
*/
private $_priority = 8;
/**
* Constructor
*
* @param array $options Associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
while (list($name, $value) = each($options)) {
$this->setOption($name, $value);
}
if ($this->_specificOptions['cached_entity'] === null) {
Zend_Cache::throwException('cached_entity must be set !');
}
$this->setCachedEntity($this->_specificOptions['cached_entity']);
$this->setOption('automatic_serialization', true);
}
/**
* Set a specific life time
*
* @param int $specificLifetime
* @return void
*/
public function setSpecificLifetime($specificLifetime = false)
{
$this->_specificLifetime = $specificLifetime;
}
/**
* Set the priority (used by some particular backends)
*
* @param int $priority integer between 0 (very low priority) and 10 (maximum priority)
*/
public function setPriority($priority)
{
$this->_priority = $priority;
}
/**
* Public frontend to set an option
*
* Just a wrapper to get a specific behaviour for cached_entity
*
* @param string $name Name of the option
* @param mixed $value Value of the option
* @throws Zend_Cache_Exception
* @return void
*/
public function setOption($name, $value)
{
if ($name == 'cached_entity') {
$this->setCachedEntity($value);
} else {
parent::setOption($name, $value);
}
}
/**
* Specific method to set the cachedEntity
*
* if set to a class name, we will cache an abstract class and will use only static calls
* if set to an object, we will cache this object methods
*
* @param mixed $cachedEntity
*/
public function setCachedEntity($cachedEntity)
{
if (!is_string($cachedEntity) && !is_object($cachedEntity)) {
Zend_Cache::throwException('cached_entity must be an object or a class name');
}
$this->_cachedEntity = $cachedEntity;
$this->_specificOptions['cached_entity'] = $cachedEntity;
if (is_string($this->_cachedEntity)){
$this->_cachedEntityLabel = $this->_cachedEntity;
} else {
$ro = new ReflectionObject($this->_cachedEntity);
$this->_cachedEntityLabel = $ro->getName();
}
}
/**
* Set the cache array
*
* @param array $tags
* @return void
*/
public function setTagsArray($tags = array())
{
$this->_tags = $tags;
}
/**
* Main method : call the specified method or get the result from cache
*
* @param string $name Method name
* @param array $parameters Method parameters
* @return mixed Result
*/
public function __call($name, $parameters)
{
$cacheBool1 = $this->_specificOptions['cache_by_default'];
$cacheBool2 = in_array($name, $this->_specificOptions['cached_methods']);
$cacheBool3 = in_array($name, $this->_specificOptions['non_cached_methods']);
$cache = (($cacheBool1 || $cacheBool2) && (!$cacheBool3));
if (!$cache) {
// We do not have not cache
return call_user_func_array(array($this->_cachedEntity, $name), $parameters);
}
$id = $this->_makeId($name, $parameters);
if ($this->test($id)) {
// A cache is available
$result = $this->load($id);
$output = $result[0];
$return = $result[1];
} else {
// A cache is not available
ob_start();
ob_implicit_flush(false);
$return = call_user_func_array(array($this->_cachedEntity, $name), $parameters);
$output = ob_get_contents();
ob_end_clean();
$data = array($output, $return);
$this->save($data, $id, $this->_tags, $this->_specificLifetime, $this->_priority);
}
echo $output;
return $return;
}
/**
* Make a cache id from the method name and parameters
*
* @param string $name Method name
* @param array $parameters Method parameters
* @return string Cache id
*/
private function _makeId($name, $parameters)
{
return md5($this->_cachedEntityLabel . '__' . $name . '__' . serialize($parameters));
}
}
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