<?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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: File.php 24594 2012-01-05 21:27:01Z matthew $
*/
/**
* @see Zend_Cache_Core
*/
require_once 'Zend/Cache/Core.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Frontend
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Frontend_File extends Zend_Cache_Core
{
/**
* Consts for master_files_mode
*/
const MODE_AND = 'AND';
const MODE_OR = 'OR';
/**
* Available options
*
* ====> (string) master_file :
* - a complete path of the master file
* - deprecated (see master_files)
*
* ====> (array) master_files :
* - an array of complete path of master files
* - this option has to be set !
*
* ====> (string) master_files_mode :
* - Zend_Cache_Frontend_File::MODE_AND or Zend_Cache_Frontend_File::MODE_OR
* - if MODE_AND, then all master files have to be touched to get a cache invalidation
* - if MODE_OR (default), then a single touched master file is enough to get a cache invalidation
*
* ====> (boolean) ignore_missing_master_files
* - if set to true, missing master files are ignored silently
* - if set to false (default), an exception is thrown if there is a missing master file
* @var array available options
*/
protected $_specificOptions = array(
'master_file' => null,
'master_files' => null,
'master_files_mode' => 'OR',
'ignore_missing_master_files' => false
);
/**
* Master file mtimes
*
* Array of int
*
* @var array
*/
private $_masterFile_mtimes = null;
/**
* 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, $value);
}
if (!isset($this->_specificOptions['master_files'])) {
Zend_Cache::throwException('master_files option must be set');
}
}
/**
* Change the master_files option
*
* @param array $masterFiles the complete paths and name of the master files
*/
public function setMasterFiles(array $masterFiles)
{
$this->_specificOptions['master_file'] = null; // to keep a compatibility
$this->_specificOptions['master_files'] = null;
$this->_masterFile_mtimes = array();
clearstatcache();
$i = 0;
foreach ($masterFiles as $masterFile) {
if (file_exists($masterFile)) {
$mtime = filemtime($masterFile);
} else {
$mtime = false;
}
if (!$this->_specificOptions['ignore_missing_master_files'] && !$mtime) {
Zend_Cache::throwException('Unable to read master_file : ' . $masterFile);
}
$this->_masterFile_mtimes[$i] = $mtime;
$this->_specificOptions['master_files'][$i] = $masterFile;
if ($i === 0) { // to keep a compatibility
$this->_specificOptions['master_file'] = $masterFile;
}
$i++;
}
}
/**
* Change the master_file option
*
* To keep the compatibility
*
* @deprecated
* @param string $masterFile the complete path and name of the master file
*/
public function setMasterFile($masterFile)
{
$this->setMasterFiles(array($masterFile));
}
/**
* Public frontend to set an option
*
* Just a wrapper to get a specific behaviour for master_file
*
* @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 == 'master_file') {
$this->setMasterFile($value);
} else if ($name == 'master_files') {
$this->setMasterFiles($value);
} else {
parent::setOption($name, $value);
}
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @param boolean $doNotUnserialize Do not serialize (even if automatic_serialization is true) => for internal use
* @return mixed|false Cached datas
*/
public function load($id, $doNotTestCacheValidity = false, $doNotUnserialize = false)
{
if (!$doNotTestCacheValidity) {
if ($this->test($id)) {
return parent::load($id, true, $doNotUnserialize);
}
return false;
}
return parent::load($id, true, $doNotUnserialize);
}
/**
* Test if a cache is available for the given id
*
* @param string $id Cache id
* @return int|false Last modified time of cache entry if it is available, false otherwise
*/
public function test($id)
{
$lastModified = parent::test($id);
if ($lastModified) {
if ($this->_specificOptions['master_files_mode'] == self::MODE_AND) {
// MODE_AND
foreach($this->_masterFile_mtimes as $masterFileMTime) {
if ($masterFileMTime) {
if ($lastModified > $masterFileMTime) {
return $lastModified;
}
}
}
} else {
// MODE_OR
$res = true;
foreach($this->_masterFile_mtimes as $masterFileMTime) {
if ($masterFileMTime) {
if ($lastModified <= $masterFileMTime) {
return false;
}
}
}
return $lastModified;
}
}
return false;
}
}