import v1.0.0-RC4 | 2009-05-20

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/ExtendedInterface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_Apc extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
{
/**
* Log message
*/
const TAGS_UNSUPPORTED_BY_CLEAN_OF_APC_BACKEND = 'Zend_Cache_Backend_Apc::clean() : tags are unsupported by the Apc backend';
const TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND = 'Zend_Cache_Backend_Apc::save() : tags are unsupported by the Apc backend';
/**
* Constructor
*
* @param array $options associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
if (!extension_loaded('apc')) {
Zend_Cache::throwException('The apc extension must be loaded for using this backend !');
}
parent::__construct($options);
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* WARNING $doNotTestCacheValidity=true is unsupported by the Apc backend
*
* @param string $id cache id
* @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
* @return string cached datas (or false)
*/
public function load($id, $doNotTestCacheValidity = false)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
return $tmp[0];
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
return $tmp[1];
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data datas to cache
* @param string $id cache id
* @param array $tags array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime if != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$lifetime = $this->getLifetime($specificLifetime);
$result = apc_store($id, array($data, time(), $lifetime), $lifetime);
if (count($tags) > 0) {
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND);
}
return $result;
}
/**
* Remove a cache record
*
* @param string $id cache id
* @return boolean true if no problem
*/
public function remove($id)
{
return apc_delete($id);
}
/**
* Clean some cache records
*
* Available modes are :
* 'all' (default) => remove all cache entries ($tags is not used)
* 'old' => unsupported
* 'matchingTag' => unsupported
* 'notMatchingTag' => unsupported
* 'matchingAnyTag' => unsupported
*
* @param string $mode clean mode
* @param array $tags array of tags
* @throws Zend_Cache_Exception
* @return boolean true if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
return apc_clear_cache('user');
break;
case Zend_Cache::CLEANING_MODE_OLD:
$this->_log("Zend_Cache_Backend_Apc::clean() : CLEANING_MODE_OLD is unsupported by the Apc backend");
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$this->_log(self::TAGS_UNSUPPORTED_BY_CLEAN_OF_APC_BACKEND);
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
/**
* Return true if the automatic cleaning is available for the backend
*
* DEPRECATED : use getCapabilities() instead
*
* @deprecated
* @return boolean
*/
public function isAutomaticCleaningAvailable()
{
return false;
}
/**
* Return the filling percentage of the backend storage
*
* @throws Zend_Cache_Exception
* @return int integer between 0 and 100
*/
public function getFillingPercentage()
{
$mem = apc_sma_info(true);
$memSize = $mem['num_seg'] * $mem['seg_size'];
$memAvailable= $mem['avail_mem'];
$memUsed = $memSize - $memAvailable;
if ($memSize == 0) {
Zend_Cache::throwException('can\'t get apc memory size');
}
if ($memUsed > $memSize) {
return 100;
}
return ((int) (100. * ($memUsed / $memSize)));
}
/**
* Return an array of stored tags
*
* @return array array of stored tags (string)
*/
public function getTags()
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which match given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of matching cache ids (string)
*/
public function getIdsMatchingTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which don't match given tags
*
* In case of multiple tags, a logical OR is made between tags
*
* @param array $tags array of tags
* @return array array of not matching cache ids (string)
*/
public function getIdsNotMatchingTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which match any given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of any matching cache ids (string)
*/
public function getIdsMatchingAnyTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_APC_BACKEND);
return array();
}
/**
* Return an array of stored cache ids
*
* @return array array of stored cache ids (string)
*/
public function getIds()
{
$res = array();
$array = apc_cache_info('user', false);
$records = $array['cache_list'];
foreach ($records as $record) {
$res[] = $record['info'];
}
return $res;
}
/**
* Return an array of metadatas for the given cache id
*
* The array must include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
* @return array array of metadatas (false if the cache id is not found)
*/
public function getMetadatas($id)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
$data = $tmp[0];
$mtime = $tmp[1];
if (!isset($tmp[2])) {
// because this record is only with 1.7 release
// if old cache records are still there...
return false;
}
$lifetime = $tmp[2];
return array(
'expire' => $mtime + $lifetime,
'tags' => array(),
'mtime' => $mtime
);
}
return false;
}
/**
* Give (if possible) an extra lifetime to the given cache id
*
* @param string $id cache id
* @param int $extraLifetime
* @return boolean true if ok
*/
public function touch($id, $extraLifetime)
{
$tmp = apc_fetch($id);
if (is_array($tmp)) {
$data = $tmp[0];
$mtime = $tmp[1];
if (!isset($tmp[2])) {
// because this record is only with 1.7 release
// if old cache records are still there...
return false;
}
$lifetime = $tmp[2];
$newLifetime = $lifetime - (time() - $mtime) + $extraLifetime;
if ($newLifetime <=0) {
return false;
}
apc_store($id, array($data, time(), $newLifetime), $newLifetime);
return true;
}
return false;
}
/**
* Return an associative array of capabilities (booleans) of the backend
*
* The array must include these keys :
* - automatic_cleaning (is automating cleaning necessary)
* - tags (are tags supported)
* - expired_read (is it possible to read expired cache records
* (for doNotTestCacheValidity option for example))
* - priority does the backend deal with priority when saving
* - infinite_lifetime (is infinite lifetime can work with this backend)
* - get_list (is it possible to get the list of cache ids and the complete list of tags)
*
* @return array associative of with capabilities
*/
public function getCapabilities()
{
return array(
'automatic_cleaning' => false,
'tags' => false,
'expired_read' => false,
'priority' => false,
'infinite_lifetime' => false,
'get_list' => true
);
}
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/Interface.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
interface Zend_Cache_Backend_ExtendedInterface extends Zend_Cache_Backend_Interface
{
/**
* Return an array of stored cache ids
*
* @return array array of stored cache ids (string)
*/
public function getIds();
/**
* Return an array of stored tags
*
* @return array array of stored tags (string)
*/
public function getTags();
/**
* Return an array of stored cache ids which match given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of matching cache ids (string)
*/
public function getIdsMatchingTags($tags = array());
/**
* Return an array of stored cache ids which don't match given tags
*
* In case of multiple tags, a logical OR is made between tags
*
* @param array $tags array of tags
* @return array array of not matching cache ids (string)
*/
public function getIdsNotMatchingTags($tags = array());
/**
* Return an array of stored cache ids which match any given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of any matching cache ids (string)
*/
public function getIdsMatchingAnyTags($tags = array());
/**
* Return the filling percentage of the backend storage
*
* @return int integer between 0 and 100
*/
public function getFillingPercentage();
/**
* Return an array of metadatas for the given cache id
*
* The array must include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
* @return array array of metadatas (false if the cache id is not found)
*/
public function getMetadatas($id);
/**
* Give (if possible) an extra lifetime to the given cache id
*
* @param string $id cache id
* @param int $extraLifetime
* @return boolean true if ok
*/
public function touch($id, $extraLifetime);
/**
* Return an associative array of capabilities (booleans) of the backend
*
* The array must include these keys :
* - automatic_cleaning (is automating cleaning necessary)
* - tags (are tags supported)
* - expired_read (is it possible to read expired cache records
* (for doNotTestCacheValidity option for example))
* - priority does the backend deal with priority when saving
* - infinite_lifetime (is infinite lifetime can work with this backend)
* - get_list (is it possible to get the list of cache ids and the complete list of tags)
*
* @return array associative of with capabilities
*/
public function getCapabilities();
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
interface Zend_Cache_Backend_Interface
{
/**
* Set the frontend directives
*
* @param array $directives assoc of directives
*/
public function setDirectives($directives);
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* Note : return value is always "string" (unserialization is done by the core not by the backend)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string|false cached datas
*/
public function load($id, $doNotTestCacheValidity = false);
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed|false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id);
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data Datas to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false);
/**
* Remove a cache record
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id);
/**
* Clean some cache records
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @return boolean true if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array());
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/ExtendedInterface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_Memcached extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
{
/**
* Default Host IP Address or DNS
*/
const DEFAULT_HOST = '127.0.0.1';
/**
* Default port
*/
const DEFAULT_PORT = 11211;
/**
* Persistent
*/
const DEFAULT_PERSISTENT = true;
/**
* Log message
*/
const TAGS_UNSUPPORTED_BY_CLEAN_OF_MEMCACHED_BACKEND = 'Zend_Cache_Backend_Memcached::clean() : tags are unsupported by the Memcached backend';
const TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND = 'Zend_Cache_Backend_Memcached::save() : tags are unsupported by the Memcached backend';
/**
* Available options
*
* =====> (array) servers :
* an array of memcached server ; each memcached server is described by an associative array :
* 'host' => (string) : the name of the memcached server
* 'port' => (int) : the port of the memcached server
* 'persistent' => (bool) : use or not persistent connections to this memcached server
*
* =====> (boolean) compression :
* true if you want to use on-the-fly compression
*
* @var array available options
*/
protected $_options = array(
'servers' => array(array(
'host' => Zend_Cache_Backend_Memcached::DEFAULT_HOST,
'port' => Zend_Cache_Backend_Memcached::DEFAULT_PORT,
'persistent' => Zend_Cache_Backend_Memcached::DEFAULT_PERSISTENT
)),
'compression' => false
);
/**
* Memcache object
*
* @var mixed memcache object
*/
protected $_memcache = null;
/**
* Constructor
*
* @param array $options associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
if (!extension_loaded('memcache')) {
Zend_Cache::throwException('The memcache extension must be loaded for using this backend !');
}
parent::__construct($options);
if (isset($this->_options['servers'])) {
$value= $this->_options['servers'];
if (isset($value['host'])) {
// in this case, $value seems to be a simple associative array (one server only)
$value = array(0 => $value); // let's transform it into a classical array of associative arrays
}
$this->setOption('servers', $value);
}
$this->_memcache = new Memcache;
foreach ($this->_options['servers'] as $server) {
if (!array_key_exists('persistent', $server)) {
$server['persistent'] = Zend_Cache_Backend_Memcached::DEFAULT_PERSISTENT;
}
if (!array_key_exists('port', $server)) {
$server['port'] = Zend_Cache_Backend_Memcached::DEFAULT_PORT;
}
$this->_memcache->addServer($server['host'], $server['port'], $server['persistent']);
}
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string|false cached datas
*/
public function load($id, $doNotTestCacheValidity = false)
{
$tmp = $this->_memcache->get($id);
if (is_array($tmp)) {
return $tmp[0];
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id Cache id
* @return mixed|false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$tmp = $this->_memcache->get($id);
if (is_array($tmp)) {
return $tmp[1];
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data Datas to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean True if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$lifetime = $this->getLifetime($specificLifetime);
if ($this->_options['compression']) {
$flag = MEMCACHE_COMPRESSED;
} else {
$flag = 0;
}
if ($this->test($id)) {
// because set and replace seems to have different behaviour
$result = $this->_memcache->replace($id, array($data, time(), $lifetime), $flag, $lifetime);
} else {
$result = $this->_memcache->set($id, array($data, time(), $lifetime), $flag, $lifetime);
}
if (count($tags) > 0) {
$this->_log("Zend_Cache_Backend_Memcached::save() : tags are unsupported by the Memcached backend");
}
return $result;
}
/**
* Remove a cache record
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id)
{
return $this->_memcache->delete($id);
}
/**
* Clean some cache records
*
* Available modes are :
* 'all' (default) => remove all cache entries ($tags is not used)
* 'old' => unsupported
* 'matchingTag' => unsupported
* 'notMatchingTag' => unsupported
* 'matchingAnyTag' => unsupported
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @throws Zend_Cache_Exception
* @return boolean True if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
return $this->_memcache->flush();
break;
case Zend_Cache::CLEANING_MODE_OLD:
$this->_log("Zend_Cache_Backend_Memcached::clean() : CLEANING_MODE_OLD is unsupported by the Memcached backend");
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$this->_log(self::TAGS_UNSUPPORTED_BY_CLEAN_OF_MEMCACHED_BACKEND);
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
/**
* Return true if the automatic cleaning is available for the backend
*
* @return boolean
*/
public function isAutomaticCleaningAvailable()
{
return false;
}
/**
* Set the frontend directives
*
* @param array $directives Assoc of directives
* @throws Zend_Cache_Exception
* @return void
*/
public function setDirectives($directives)
{
parent::setDirectives($directives);
$lifetime = $this->getLifetime(false);
if ($lifetime > 2592000) {
// #ZF-3490 : For the memcached backend, there is a lifetime limit of 30 days (2592000 seconds)
$this->_log('memcached backend has a limit of 30 days (2592000 seconds) for the lifetime');
}
if (is_null($lifetime)) {
// #ZF-4614 : we tranform null to zero to get the maximal lifetime
parent::setDirectives(array('lifetime' => 0));
}
}
/**
* Return an array of stored cache ids
*
* @return array array of stored cache ids (string)
*/
public function getIds()
{
$this->_log("Zend_Cache_Backend_Memcached::save() : getting the list of cache ids is unsupported by the Memcache backend");
return array();
}
/**
* Return an array of stored tags
*
* @return array array of stored tags (string)
*/
public function getTags()
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which match given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of matching cache ids (string)
*/
public function getIdsMatchingTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which don't match given tags
*
* In case of multiple tags, a logical OR is made between tags
*
* @param array $tags array of tags
* @return array array of not matching cache ids (string)
*/
public function getIdsNotMatchingTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND);
return array();
}
/**
* Return an array of stored cache ids which match any given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of any matching cache ids (string)
*/
public function getIdsMatchingAnyTags($tags = array())
{
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND);
return array();
}
/**
* Return the filling percentage of the backend storage
*
* @throws Zend_Cache_Exception
* @return int integer between 0 and 100
*/
public function getFillingPercentage()
{
$mem = $this->_memcache->getStats();
$memSize = $mem['limit_maxbytes'];
$memUsed= $mem['bytes'];
if ($memSize == 0) {
Zend_Cache::throwException('can\'t get memcache memory size');
}
if ($memUsed > $memSize) {
return 100;
}
return ((int) (100. * ($memUsed / $memSize)));
}
/**
* Return an array of metadatas for the given cache id
*
* The array must include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
* @return array array of metadatas (false if the cache id is not found)
*/
public function getMetadatas($id)
{
$tmp = $this->_memcache->get($id);
if (is_array($tmp)) {
$data = $tmp[0];
$mtime = $tmp[1];
if (!isset($tmp[2])) {
// because this record is only with 1.7 release
// if old cache records are still there...
return false;
}
$lifetime = $tmp[2];
return array(
'expire' => $mtime + $lifetime,
'tags' => array(),
'mtime' => $mtime
);
}
return false;
}
/**
* Give (if possible) an extra lifetime to the given cache id
*
* @param string $id cache id
* @param int $extraLifetime
* @return boolean true if ok
*/
public function touch($id, $extraLifetime)
{
if ($this->_options['compression']) {
$flag = MEMCACHE_COMPRESSED;
} else {
$flag = 0;
}
$tmp = $this->_memcache->get($id);
if (is_array($tmp)) {
$data = $tmp[0];
$mtime = $tmp[1];
if (!isset($tmp[2])) {
// because this record is only with 1.7 release
// if old cache records are still there...
return false;
}
$lifetime = $tmp[2];
$newLifetime = $lifetime - (time() - $mtime) + $extraLifetime;
if ($newLifetime <=0) {
return false;
}
if ($this->test($id)) {
// because set and replace seems to have different behaviour
$result = $this->_memcache->replace($id, array($data, time(), $newLifetime), $flag, $newLifetime);
} else {
$result = $this->_memcache->set($id, array($data, time(), $newLifetime), $flag, $newLifetime);
}
return true;
}
return false;
}
/**
* Return an associative array of capabilities (booleans) of the backend
*
* The array must include these keys :
* - automatic_cleaning (is automating cleaning necessary)
* - tags (are tags supported)
* - expired_read (is it possible to read expired cache records
* (for doNotTestCacheValidity option for example))
* - priority does the backend deal with priority when saving
* - infinite_lifetime (is infinite lifetime can work with this backend)
* - get_list (is it possible to get the list of cache ids and the complete list of tags)
*
* @return array associative of with capabilities
*/
public function getCapabilities()
{
return array(
'automatic_cleaning' => false,
'tags' => false,
'expired_read' => false,
'priority' => false,
'infinite_lifetime' => false,
'get_list' => false
);
}
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/ExtendedInterface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_Sqlite extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
{
/**
* Available options
*
* =====> (string) cache_db_complete_path :
* - the complete path (filename included) of the SQLITE database
*
* ====> (int) automatic_vacuum_factor :
* - Disable / Tune the automatic vacuum process
* - The automatic vacuum process defragment the database file (and make it smaller)
* when a clean() or delete() is called
* 0 => no automatic vacuum
* 1 => systematic vacuum (when delete() or clean() methods are called)
* x (integer) > 1 => automatic vacuum randomly 1 times on x clean() or delete()
*
* @var array Available options
*/
protected $_options = array(
'cache_db_complete_path' => null,
'automatic_vacuum_factor' => 10
);
/**
* DB ressource
*
* @var mixed $_db
*/
private $_db = null;
/**
* Boolean to store if the structure has benn checked or not
*
* @var boolean $_structureChecked
*/
private $_structureChecked = false;
/**
* Constructor
*
* @param array $options Associative array of options
* @throws Zend_cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
parent::__construct($options);
if (is_null($this->_options['cache_db_complete_path'])) {
Zend_Cache::throwException('cache_db_complete_path option has to set');
}
if (!extension_loaded('sqlite')) {
Zend_Cache::throwException("Cannot use SQLite storage because the 'sqlite' extension is not loaded in the current PHP environment");
}
$this->_getConnection();
}
/**
* Destructor
*
* @return void
*/
public function __destruct()
{
@sqlite_close($this->_getConnection());
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string|false Cached datas
*/
public function load($id, $doNotTestCacheValidity = false)
{
$this->_checkAndBuildStructure();
$sql = "SELECT content FROM cache WHERE id='$id'";
if (!$doNotTestCacheValidity) {
$sql = $sql . " AND (expire=0 OR expire>" . time() . ')';
}
$result = $this->_query($sql);
$row = @sqlite_fetch_array($result);
if ($row) {
return $row['content'];
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id Cache id
* @return mixed|false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$this->_checkAndBuildStructure();
$sql = "SELECT lastModified FROM cache WHERE id='$id' AND (expire=0 OR expire>" . time() . ')';
$result = $this->_query($sql);
$row = @sqlite_fetch_array($result);
if ($row) {
return ((int) $row['lastModified']);
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data Datas to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @throws Zend_Cache_Exception
* @return boolean True if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$this->_checkAndBuildStructure();
$lifetime = $this->getLifetime($specificLifetime);
$data = @sqlite_escape_string($data);
$mktime = time();
if (is_null($lifetime)) {
$expire = 0;
} else {
$expire = $mktime + $lifetime;
}
$this->_query("DELETE FROM cache WHERE id='$id'");
$sql = "INSERT INTO cache (id, content, lastModified, expire) VALUES ('$id', '$data', $mktime, $expire)";
$res = $this->_query($sql);
if (!$res) {
$this->_log("Zend_Cache_Backend_Sqlite::save() : impossible to store the cache id=$id");
return false;
}
$res = true;
foreach ($tags as $tag) {
$res = $res && $this->_registerTag($id, $tag);
}
return $res;
}
/**
* Remove a cache record
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id)
{
$this->_checkAndBuildStructure();
$res = $this->_query("SELECT COUNT(*) AS nbr FROM cache WHERE id='$id'");
$result1 = @sqlite_fetch_single($res);
$result2 = $this->_query("DELETE FROM cache WHERE id='$id'");
$result3 = $this->_query("DELETE FROM tag WHERE id='$id'");
$this->_automaticVacuum();
return ($result1 && $result2 && $result3);
}
/**
* Clean some cache records
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @return boolean True if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
$this->_checkAndBuildStructure();
$return = $this->_clean($mode, $tags);
$this->_automaticVacuum();
return $return;
}
/**
* Return an array of stored cache ids
*
* @return array array of stored cache ids (string)
*/
public function getIds()
{
$this->_checkAndBuildStructure();
$res = $this->_query("SELECT id FROM cache WHERE (expire=0 OR expire>" . time() . ")");
$result = array();
while ($id = @sqlite_fetch_single($res)) {
$result[] = $id;
}
return $result;
}
/**
* Return an array of stored tags
*
* @return array array of stored tags (string)
*/
public function getTags()
{
$this->_checkAndBuildStructure();
$res = $this->_query("SELECT DISTINCT(name) AS name FROM tag");
$result = array();
while ($id = @sqlite_fetch_single($res)) {
$result[] = $id;
}
return $result;
}
/**
* Return an array of stored cache ids which match given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of matching cache ids (string)
*/
public function getIdsMatchingTags($tags = array())
{
$first = true;
$ids = array();
foreach ($tags as $tag) {
$res = $this->_query("SELECT DISTINCT(id) AS id FROM tag WHERE name='$tag'");
if (!$res) {
return array();
}
$rows = @sqlite_fetch_all($res, SQLITE_ASSOC);
$ids2 = array();
foreach ($rows as $row) {
$ids2[] = $row['id'];
}
if ($first) {
$ids = $ids2;
$first = false;
} else {
$ids = array_intersect($ids, $ids2);
}
}
$result = array();
foreach ($ids as $id) {
$result[] = $id;
}
return $result;
}
/**
* Return an array of stored cache ids which don't match given tags
*
* In case of multiple tags, a logical OR is made between tags
*
* @param array $tags array of tags
* @return array array of not matching cache ids (string)
*/
public function getIdsNotMatchingTags($tags = array())
{
$res = $this->_query("SELECT id FROM cache");
$rows = @sqlite_fetch_all($res, SQLITE_ASSOC);
$result = array();
foreach ($rows as $row) {
$id = $row['id'];
$matching = false;
foreach ($tags as $tag) {
$res = $this->_query("SELECT COUNT(*) AS nbr FROM tag WHERE name='$tag' AND id='$id'");
if (!$res) {
return array();
}
$nbr = (int) @sqlite_fetch_single($res);
if ($nbr > 0) {
$matching = true;
}
}
if (!$matching) {
$result[] = $id;
}
}
return $result;
}
/**
* Return an array of stored cache ids which match any given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of any matching cache ids (string)
*/
public function getIdsMatchingAnyTags($tags = array())
{
$first = true;
$ids = array();
foreach ($tags as $tag) {
$res = $this->_query("SELECT DISTINCT(id) AS id FROM tag WHERE name='$tag'");
if (!$res) {
return array();
}
$rows = @sqlite_fetch_all($res, SQLITE_ASSOC);
$ids2 = array();
foreach ($rows as $row) {
$ids2[] = $row['id'];
}
if ($first) {
$ids = $ids2;
$first = false;
} else {
$ids = array_merge($ids, $ids2);
}
}
$result = array();
foreach ($ids as $id) {
$result[] = $id;
}
return $result;
}
/**
* Return the filling percentage of the backend storage
*
* @throws Zend_Cache_Exception
* @return int integer between 0 and 100
*/
public function getFillingPercentage()
{
$dir = dirname($this->_options['cache_db_complete_path']);
$free = disk_free_space($dir);
$total = disk_total_space($dir);
if ($total == 0) {
Zend_Cache::throwException('can\'t get disk_total_space');
} else {
if ($free >= $total) {
return 100;
}
return ((int) (100. * ($total - $free) / $total));
}
}
/**
* Return an array of metadatas for the given cache id
*
* The array must include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
* @return array array of metadatas (false if the cache id is not found)
*/
public function getMetadatas($id)
{
$tags = array();
$res = $this->_query("SELECT name FROM tag WHERE id='$id'");
if ($res) {
$rows = @sqlite_fetch_all($res, SQLITE_ASSOC);
foreach ($rows as $row) {
$tags[] = $row['name'];
}
}
$this->_query('CREATE TABLE cache (id TEXT PRIMARY KEY, content BLOB, lastModified INTEGER, expire INTEGER)');
$res = $this->_query("SELECT lastModified,expire FROM cache WHERE id='$id'");
if (!$res) {
return false;
}
$row = @sqlite_fetch_array($res, SQLITE_ASSOC);
return array(
'tags' => $tags,
'mtime' => $row['lastModified'],
'expire' => $row['expire']
);
}
/**
* Give (if possible) an extra lifetime to the given cache id
*
* @param string $id cache id
* @param int $extraLifetime
* @return boolean true if ok
*/
public function touch($id, $extraLifetime)
{
$sql = "SELECT expire FROM cache WHERE id='$id' AND (expire=0 OR expire>" . time() . ')';
$res = $this->_query($sql);
if (!$res) {
return false;
}
$expire = @sqlite_fetch_single($res);
$newExpire = $expire + $extraLifetime;
$res = $this->_query("UPDATE cache SET lastModified=" . time() . ", expire=$newExpire WHERE id='$id'");
if ($res) {
return true;
} else {
return false;
}
}
/**
* Return an associative array of capabilities (booleans) of the backend
*
* The array must include these keys :
* - automatic_cleaning (is automating cleaning necessary)
* - tags (are tags supported)
* - expired_read (is it possible to read expired cache records
* (for doNotTestCacheValidity option for example))
* - priority does the backend deal with priority when saving
* - infinite_lifetime (is infinite lifetime can work with this backend)
* - get_list (is it possible to get the list of cache ids and the complete list of tags)
*
* @return array associative of with capabilities
*/
public function getCapabilities()
{
return array(
'automatic_cleaning' => true,
'tags' => true,
'expired_read' => true,
'priority' => false,
'infinite_lifetime' => true,
'get_list' => true
);
}
/**
* PUBLIC METHOD FOR UNIT TESTING ONLY !
*
* Force a cache record to expire
*
* @param string $id Cache id
*/
public function ___expire($id)
{
$time = time() - 1;
$this->_query("UPDATE cache SET lastModified=$time, expire=$time WHERE id='$id'");
}
/**
* Return the connection resource
*
* If we are not connected, the connection is made
*
* @throws Zend_Cache_Exception
* @return resource Connection resource
*/
private function _getConnection()
{
if (is_resource($this->_db)) {
return $this->_db;
} else {
$this->_db = @sqlite_open($this->_options['cache_db_complete_path']);
if (!(is_resource($this->_db))) {
Zend_Cache::throwException("Impossible to open " . $this->_options['cache_db_complete_path'] . " cache DB file");
}
return $this->_db;
}
}
/**
* Execute an SQL query silently
*
* @param string $query SQL query
* @return mixed|false query results
*/
private function _query($query)
{
$db = $this->_getConnection();
if (is_resource($db)) {
$res = @sqlite_query($db, $query);
if ($res === false) {
return false;
} else {
return $res;
}
}
return false;
}
/**
* Deal with the automatic vacuum process
*
* @return void
*/
private function _automaticVacuum()
{
if ($this->_options['automatic_vacuum_factor'] > 0) {
$rand = rand(1, $this->_options['automatic_vacuum_factor']);
if ($rand == 1) {
$this->_query('VACUUM');
@sqlite_close($this->_getConnection());
}
}
}
/**
* Register a cache id with the given tag
*
* @param string $id Cache id
* @param string $tag Tag
* @return boolean True if no problem
*/
private function _registerTag($id, $tag) {
$res = $this->_query("DELETE FROM TAG WHERE name='$tag' AND id='$id'");
$res = $this->_query("INSERT INTO tag (name, id) VALUES ('$tag', '$id')");
if (!$res) {
$this->_log("Zend_Cache_Backend_Sqlite::_registerTag() : impossible to register tag=$tag on id=$id");
return false;
}
return true;
}
/**
* Build the database structure
*
* @return false
*/
private function _buildStructure()
{
$this->_query('DROP INDEX tag_id_index');
$this->_query('DROP INDEX tag_name_index');
$this->_query('DROP INDEX cache_id_expire_index');
$this->_query('DROP TABLE version');
$this->_query('DROP TABLE cache');
$this->_query('DROP TABLE tag');
$this->_query('CREATE TABLE version (num INTEGER PRIMARY KEY)');
$this->_query('CREATE TABLE cache (id TEXT PRIMARY KEY, content BLOB, lastModified INTEGER, expire INTEGER)');
$this->_query('CREATE TABLE tag (name TEXT, id TEXT)');
$this->_query('CREATE INDEX tag_id_index ON tag(id)');
$this->_query('CREATE INDEX tag_name_index ON tag(name)');
$this->_query('CREATE INDEX cache_id_expire_index ON cache(id, expire)');
$this->_query('INSERT INTO version (num) VALUES (1)');
}
/**
* Check if the database structure is ok (with the good version)
*
* @return boolean True if ok
*/
private function _checkStructureVersion()
{
$result = $this->_query("SELECT num FROM version");
if (!$result) return false;
$row = @sqlite_fetch_array($result);
if (!$row) {
return false;
}
if (((int) $row['num']) != 1) {
// old cache structure
$this->_log('Zend_Cache_Backend_Sqlite::_checkStructureVersion() : old cache structure version detected => the cache is going to be dropped');
return false;
}
return true;
}
/**
* Clean some cache records
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @return boolean True if no problem
*/
private function _clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
$res1 = $this->_query('DELETE FROM cache');
$res2 = $this->_query('DELETE FROM tag');
return $res1 && $res2;
break;
case Zend_Cache::CLEANING_MODE_OLD:
$mktime = time();
$res1 = $this->_query("DELETE FROM tag WHERE id IN (SELECT id FROM cache WHERE expire>0 AND expire<=$mktime)");
$res2 = $this->_query("DELETE FROM cache WHERE expire>0 AND expire<=$mktime");
return $res1 && $res2;
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
$ids = $this->getIdsMatchingTags($tags);
$result = true;
foreach ($ids as $id) {
$result = $result && ($this->remove($id));
}
return $result;
break;
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
$ids = $this->getIdsNotMatchingTags($tags);
$result = true;
foreach ($ids as $id) {
$result = $result && ($this->remove($id));
}
return $result;
break;
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$ids = $this->getIdsMatchingAnyTags($tags);
$result = true;
foreach ($ids as $id) {
$result = $result && ($this->remove($id));
}
return $result;
break;
default:
break;
}
return false;
}
/**
* Check if the database structure is ok (with the good version), if no : build it
*
* @throws Zend_Cache_Exception
* @return boolean True if ok
*/
private function _checkAndBuildStructure()
{
if (!($this->_structureChecked)) {
if (!$this->_checkStructureVersion()) {
$this->_buildStructure();
if (!$this->_checkStructureVersion()) {
Zend_Cache::throwException("Impossible to build cache structure in " . $this->_options['cache_db_complete_path']);
}
}
$this->_structureChecked = true;
}
return true;
}
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/Interface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_Test extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
{
/**
* Available options
*
* @var array available options
*/
protected $_options = array();
/**
* Frontend or Core directives
*
* @var array directives
*/
protected $_directives = array();
/**
* Array to log actions
*
* @var array $_log
*/
private $_log = array();
/**
* Current index for log array
*
* @var int $_index
*/
private $_index = 0;
/**
* Constructor
*
* @param array $options associative array of options
* @return void
*/
public function __construct($options = array())
{
$this->_addLog('construct', array($options));
}
/**
* Set the frontend directives
*
* @param array $directives assoc of directives
* @return void
*/
public function setDirectives($directives)
{
$this->_addLog('setDirectives', array($directives));
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* For this test backend only, if $id == 'false', then the method will return false
* if $id == 'serialized', the method will return a serialized array
* ('foo' else)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string Cached datas (or false)
*/
public function load($id, $doNotTestCacheValidity = false)
{
$this->_addLog('get', array($id, $doNotTestCacheValidity));
if ($id=='false') {
return false;
}
if ($id=='serialized') {
return serialize(array('foo'));
}
if ($id=='serialized2') {
return serialize(array('headers' => array(), 'data' => 'foo'));
}
if (($id=='71769f39054f75894288e397df04e445') or ($id=='615d222619fb20b527168340cebd0578')) {
return serialize(array('foo', 'bar'));
}
if (($id=='8a02d218a5165c467e7a5747cc6bd4b6') or ($id=='648aca1366211d17cbf48e65dc570bee')) {
return serialize(array('foo', 'bar'));
}
return 'foo';
}
/**
* Test if a cache is available or not (for the given id)
*
* For this test backend only, if $id == 'false', then the method will return false
* (123456 else)
*
* @param string $id Cache id
* @return mixed|false false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$this->_addLog('test', array($id));
if ($id=='false') {
return false;
}
if (($id=='d8523b3ee441006261eeffa5c3d3a0a7') or ($id=='3c439c922209e2cb0b54d6deffccd75a')) {
return false;
}
if (($id=='40f649b94977c0a6e76902e2a0b43587') or ($id=='e83249ea22178277d5befc2c5e2e9ace')) {
return false;
}
return 123456;
}
/**
* Save some string datas into a cache record
*
* For this test backend only, if $id == 'false', then the method will return false
* (true else)
*
* @param string $data Datas to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean True if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$this->_addLog('save', array($data, $id, $tags));
if ($id=='false') {
return false;
}
return true;
}
/**
* Remove a cache record
*
* For this test backend only, if $id == 'false', then the method will return false
* (true else)
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id)
{
$this->_addLog('remove', array($id));
if ($id=='false') {
return false;
}
return true;
}
/**
* Clean some cache records
*
* For this test backend only, if $mode == 'false', then the method will return false
* (true else)
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @return boolean True if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
$this->_addLog('clean', array($mode, $tags));
if ($mode=='false') {
return false;
}
return true;
}
/**
* Get the last log
*
* @return string The last log
*/
public function getLastLog()
{
return $this->_log[$this->_index - 1];
}
/**
* Get the log index
*
* @return int Log index
*/
public function getLogIndex()
{
return $this->_index;
}
/**
* Get the complete log array
*
* @return array Complete log array
*/
public function getAllLogs()
{
return $this->_log;
}
/**
* Return true if the automatic cleaning is available for the backend
*
* @return boolean
*/
public function isAutomaticCleaningAvailable()
{
return true;
}
/**
* Add an event to the log array
*
* @param string $methodName MethodName
* @param array $args Arguments
* @return void
*/
private function _addLog($methodName, $args)
{
$this->_log[$this->_index] = array(
'methodName' => $methodName,
'args' => $args
);
$this->_index = $this->_index + 1;
}
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_ExtendedInterface
*/
require_once 'Zend/Cache/Backend/ExtendedInterface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_TwoLevels extends Zend_Cache_Backend implements Zend_Cache_Backend_ExtendedInterface
{
/**
* Available options
*
* =====> (string) slow_backend :
* - Slow backend name
* - Must implement the Zend_Cache_Backend_ExtendedInterface
* - Should provide a big storage
*
* =====> (string) fast_backend :
* - Flow backend name
* - Must implement the Zend_Cache_Backend_ExtendedInterface
* - Must be much faster than slow_backend
*
* =====> (array) slow_backend_options :
* - Slow backend options (see corresponding backend)
*
* =====> (array) fast_backend_options :
* - Fast backend options (see corresponding backend)
*
* =====> (int) stats_update_factor :
* - Disable / Tune the computation of the fast backend filling percentage
* - When saving a record into cache :
* 1 => systematic computation of the fast backend filling percentage
* x (integer) > 1 => computation of the fast backend filling percentage randomly 1 times on x cache write
*
* =====> (boolean) slow_backend_custom_naming :
* =====> (boolean) fast_backend_custom_naming :
* =====> (boolean) slow_backend_autoload :
* =====> (boolean) fast_backend_autoload :
* - See Zend_Cache::factory() method
*
* =====> (boolean) auto_refresh_fast_cache
* - If true, auto refresh the fast cache when a cache record is hit
*
* @var array available options
*/
protected $_options = array(
'slow_backend' => 'File',
'fast_backend' => 'Apc',
'slow_backend_options' => array(),
'fast_backend_options' => array(),
'stats_update_factor' => 10,
'slow_backend_custom_naming' => false,
'fast_backend_custom_naming' => false,
'slow_backend_autoload' => false,
'fast_backend_autoload' => false,
'auto_refresh_fast_cache' => true
);
/**
* Slow Backend
*
* @var Zend_Cache_Backend
*/
private $_slowBackend;
/**
* Fast Backend
*
* @var Zend_Cache_Backend
*/
private $_fastBackend;
/**
* Cache for the fast backend filling percentage
*
* @var int
*/
private $_fastBackendFillingPercentage = null;
/**
* Constructor
*
* @param array $options Associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
parent::__construct($options);
if (is_null($this->_options['slow_backend'])) {
Zend_Cache::throwException('slow_backend option has to set');
}
if (is_null($this->_options['fast_backend'])) {
Zend_Cache::throwException('fast_backend option has to set');
}
$this->_slowBackend = Zend_Cache::_makeBackend($this->_options['slow_backend'], $this->_options['slow_backend_options'], $this->_options['slow_backend_custom_naming'], $this->_options['slow_backend_autoload']);
$this->_fastBackend = Zend_Cache::_makeBackend($this->_options['fast_backend'], $this->_options['fast_backend_options'], $this->_options['fast_backend_custom_naming'], $this->_options['fast_backend_autoload']);
if (!in_array('Zend_Cache_Backend_ExtendedInterface', class_implements($this->_slowBackend))) {
Zend_Cache::throwException('slow_backend must implement the Zend_Cache_Backend_ExtendedInterface interface');
}
if (!in_array('Zend_Cache_Backend_ExtendedInterface', class_implements($this->_fastBackend))) {
Zend_Cache::throwException('slow_backend must implement the Zend_Cache_Backend_ExtendedInterface interface');
}
$this->_slowBackend->setDirectives($this->_directives);
$this->_fastBackend->setDirectives($this->_directives);
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed|false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$fastTest = $this->_fastBackend->test($id);
if ($fastTest) {
return $fastTest;
} else {
return $this->_slowBackend->test($id);
}
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data Datas to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @param int $priority integer between 0 (very low priority) and 10 (maximum priority) used by some particular backends
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false, $priority = 8)
{
$usage = $this->_getFastFillingPercentage('saving');
$boolFast = true;
$lifetime = $this->getLifetime($specificLifetime);
$preparedData = $this->_prepareData($data, $lifetime, $priority);
if (($priority > 0) && (10 * $priority >= $usage)) {
$fastLifetime = $this->_getFastLifetime($lifetime, $priority);
$boolFast = $this->_fastBackend->save($preparedData, $id, array(), $fastLifetime);
}
$boolSlow = $this->_slowBackend->save($preparedData, $id, $tags, $lifetime);
return ($boolFast && $boolSlow);
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* Note : return value is always "string" (unserialization is done by the core not by the backend)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string|false cached datas
*/
public function load($id, $doNotTestCacheValidity = false)
{
$res = $this->_fastBackend->load($id, $doNotTestCacheValidity);
if ($res === false) {
$res = $this->_slowBackend->load($id, $doNotTestCacheValidity);
if ($res === false) {
// there is no cache at all for this id
return false;
}
}
$array = unserialize($res);
// maybe, we have to refresh the fast cache ?
if ($this->_options['auto_refresh_fast_cache']) {
if ($array['priority'] == 10) {
// no need to refresh the fast cache with priority = 10
return $array['data'];
}
$newFastLifetime = $this->_getFastLifetime($array['lifetime'], $array['priority'], time() - $array['expire']);
// we have the time to refresh the fast cache
$usage = $this->_getFastFillingPercentage('loading');
if (($array['priority'] > 0) && (10 * $array['priority'] >= $usage)) {
// we can refresh the fast cache
$preparedData = $this->_prepareData($array['data'], $array['lifetime'], $array['priority']);
$this->_fastBackend->save($preparedData, $id, array(), $newFastLifetime);
}
}
return $array['data'];
}
/**
* Remove a cache record
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id)
{
$this->_fastBackend->remove($id);
return $this->_slowBackend->remove($id);
}
/**
* Clean some cache records
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags}
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @throws Zend_Cache_Exception
* @return boolean true if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
$boolFast = $this->_fastBackend->clean(Zend_Cache::CLEANING_MODE_ALL);
$boolSlow = $this->_slowBackend->clean(Zend_Cache::CLEANING_MODE_ALL);
return $boolFast && $boolSlow;
break;
case Zend_Cache::CLEANING_MODE_OLD:
return $this->_slowBackend->clean(Zend_Cache::CLEANING_MODE_OLD);
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
$ids = $this->_slowBackend->getIdsMatchingTags($tags);
$res = true;
foreach ($ids as $id) {
$res = $res && $this->_slowBackend->remove($id) && $this->_fastBackend->remove($id);
}
return $res;
break;
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
$ids = $this->_slowBackend->getIdsNotMatchingTags($tags);
$res = true;
foreach ($ids as $id) {
$res = $res && $this->_slowBackend->remove($id) && $this->_fastBackend->remove($id);
}
return $res;
break;
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$ids = $this->_slowBackend->getIdsMatchingAnyTags($tags);
$res = true;
foreach ($ids as $id) {
$res = $res && $this->_slowBackend->remove($id) && $this->_fastBackend->remove($id);
}
return $res;
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
/**
* Return an array of stored cache ids
*
* @return array array of stored cache ids (string)
*/
public function getIds()
{
return $this->_slowBackend->getIds();
}
/**
* Return an array of stored tags
*
* @return array array of stored tags (string)
*/
public function getTags()
{
return $this->_slowBackend->getTags();
}
/**
* Return an array of stored cache ids which match given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of matching cache ids (string)
*/
public function getIdsMatchingTags($tags = array())
{
return $this->_slowBackend->getIdsMatchingTags($tags);
}
/**
* Return an array of stored cache ids which don't match given tags
*
* In case of multiple tags, a logical OR is made between tags
*
* @param array $tags array of tags
* @return array array of not matching cache ids (string)
*/
public function getIdsNotMatchingTags($tags = array())
{
return $this->_slowBackend->getIdsNotMatchingTags($tags);
}
/**
* Return an array of stored cache ids which match any given tags
*
* In case of multiple tags, a logical AND is made between tags
*
* @param array $tags array of tags
* @return array array of any matching cache ids (string)
*/
public function getIdsMatchingAnyTags($tags = array())
{
return $this->_slowBackend->getIdsMatchingAnyTags($tags);
}
/**
* Return the filling percentage of the backend storage
*
* @return int integer between 0 and 100
*/
public function getFillingPercentage()
{
return $this->_slowBackend->getFillingPercentage();
}
/**
* Return an array of metadatas for the given cache id
*
* The array must include these keys :
* - expire : the expire timestamp
* - tags : a string array of tags
* - mtime : timestamp of last modification time
*
* @param string $id cache id
* @return array array of metadatas (false if the cache id is not found)
*/
public function getMetadatas($id)
{
return $this->_slowBackend->getMetadatas($id);
}
/**
* Give (if possible) an extra lifetime to the given cache id
*
* @param string $id cache id
* @param int $extraLifetime
* @return boolean true if ok
*/
public function touch($id, $extraLifetime)
{
return $this->_slowBackend->touch($id, $extraLifetime);
}
/**
* Return an associative array of capabilities (booleans) of the backend
*
* The array must include these keys :
* - automatic_cleaning (is automating cleaning necessary)
* - tags (are tags supported)
* - expired_read (is it possible to read expired cache records
* (for doNotTestCacheValidity option for example))
* - priority does the backend deal with priority when saving
* - infinite_lifetime (is infinite lifetime can work with this backend)
* - get_list (is it possible to get the list of cache ids and the complete list of tags)
*
* @return array associative of with capabilities
*/
public function getCapabilities()
{
$slowBackendCapabilities = $this->_slowBackend->getCapabilities();
return array(
'automatic_cleaning' => $slowBackendCapabilities['automatic_cleaning'],
'tags' => $slowBackendCapabilities['tags'],
'expired_read' => $slowBackendCapabilities['expired_read'],
'priority' => $slowBackendCapabilities['priority'],
'infinite_lifetime' => $slowBackendCapabilities['infinite_lifetime'],
'get_list' => $slowBackendCapabilities['get_list']
);
}
/**
* Prepare a serialized array to store datas and metadatas informations
*
* @param string $data data to store
* @param int $lifetime original lifetime
* @param int $priority priority
* @return string serialize array to store into cache
*/
private function _prepareData($data, $lifetime, $priority)
{
$lt = $lifetime;
if (is_null($lt)) {
$lt = 9999999999;
}
return serialize(array(
'data' => $data,
'lifetime' => $lifetime,
'expire' => time() + $lt,
'priority' => $priority
));
}
/**
* Compute and return the lifetime for the fast backend
*
* @param int $lifetime original lifetime
* @param int $priority priority
* @param int $maxLifetime maximum lifetime
* @return int lifetime for the fast backend
*/
private function _getFastLifetime($lifetime, $priority, $maxLifetime = null)
{
if (is_null($lifetime)) {
// if lifetime is null, we have an infinite lifetime
// we need to use arbitrary lifetimes
$fastLifetime = (int) (2592000 / (11 - $priority));
} else {
$fastLifetime = (int) ($lifetime / (11 - $priority));
}
if (!is_null($maxLifetime) && ($maxLifetime >= 0)) {
if ($fastLifetime > $maxLifetime) {
return $maxLifetime;
}
}
return $fastLifetime;
}
/**
* PUBLIC METHOD FOR UNIT TESTING ONLY !
*
* Force a cache record to expire
*
* @param string $id cache id
*/
public function ___expire($id)
{
$this->_fastBackend->remove($id);
$this->_slowBackend->___expire($id);
}
private function _getFastFillingPercentage($mode)
{
if ($mode == 'saving') {
// mode saving
if (is_null($this->_fastBackendFillingPercentage)) {
$this->_fastBackendFillingPercentage = $this->_fastBackend->getFillingPercentage();
} else {
$rand = rand(1, $this->_options['stats_update_factor']);
if ($rand == 1) {
// we force a refresh
$this->_fastBackendFillingPercentage = $this->_fastBackend->getFillingPercentage();
}
}
} else {
// mode loading
// we compute the percentage only if it's not available in cache
if (is_null($this->_fastBackendFillingPercentage)) {
$this->_fastBackendFillingPercentage = $this->_fastBackend->getFillingPercentage();
}
}
return $this->_fastBackendFillingPercentage;
}
}

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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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/Interface.php';
/**
* @see Zend_Cache_Backend
*/
require_once 'Zend/Cache/Backend.php';
/**
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_Xcache extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
{
/**
* Log message
*/
const TAGS_UNSUPPORTED_BY_CLEAN_OF_XCACHE_BACKEND = 'Zend_Cache_Backend_Xcache::clean() : tags are unsupported by the Xcache backend';
const TAGS_UNSUPPORTED_BY_SAVE_OF_XCACHE_BACKEND = 'Zend_Cache_Backend_Xcache::save() : tags are unsupported by the Xcache backend';
/**
* Available options
*
* =====> (string) user :
* xcache.admin.user (necessary for the clean() method)
*
* =====> (string) password :
* xcache.admin.pass (clear, not MD5) (necessary for the clean() method)
*
* @var array available options
*/
protected $_options = array(
'user' => null,
'password' => null
);
/**
* Constructor
*
* @param array $options associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
if (!extension_loaded('xcache')) {
Zend_Cache::throwException('The xcache extension must be loaded for using this backend !');
}
parent::__construct($options);
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* WARNING $doNotTestCacheValidity=true is unsupported by the Xcache backend
*
* @param string $id cache id
* @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
* @return string cached datas (or false)
*/
public function load($id, $doNotTestCacheValidity = false)
{
if ($doNotTestCacheValidity) {
$this->_log("Zend_Cache_Backend_Xcache::load() : \$doNotTestCacheValidity=true is unsupported by the Xcache backend");
}
$tmp = xcache_get($id);
if (is_array($tmp)) {
return $tmp[0];
}
return false;
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id cache id
* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
if (xcache_isset($id)) {
$tmp = xcache_get($id);
if (is_array($tmp)) {
return $tmp[1];
}
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data datas to cache
* @param string $id cache id
* @param array $tags array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime if != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
$lifetime = $this->getLifetime($specificLifetime);
$result = xcache_set($id, array($data, time()), $lifetime);
if (count($tags) > 0) {
$this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_XCACHE_BACKEND);
}
return $result;
}
/**
* Remove a cache record
*
* @param string $id cache id
* @return boolean true if no problem
*/
public function remove($id)
{
return xcache_unset($id);
}
/**
* Clean some cache records
*
* Available modes are :
* 'all' (default) => remove all cache entries ($tags is not used)
* 'old' => unsupported
* 'matchingTag' => unsupported
* 'notMatchingTag' => unsupported
* 'matchingAnyTag' => unsupported
*
* @param string $mode clean mode
* @param array $tags array of tags
* @throws Zend_Cache_Exception
* @return boolean true if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
// Necessary because xcache_clear_cache() need basic authentification
$backup = array();
if (isset($_SERVER['PHP_AUTH_USER'])) {
$backup['PHP_AUTH_USER'] = $_SERVER['PHP_AUTH_USER'];
}
if (isset($_SERVER['PHP_AUTH_PW'])) {
$backup['PHP_AUTH_PW'] = $_SERVER['PHP_AUTH_PW'];
}
if ($this->_options['user']) {
$_SERVER['PHP_AUTH_USER'] = $this->_options['user'];
}
if ($this->_options['password']) {
$_SERVER['PHP_AUTH_PW'] = $this->_options['password'];
}
xcache_clear_cache(XC_TYPE_VAR, 0);
if (isset($backup['PHP_AUTH_USER'])) {
$_SERVER['PHP_AUTH_USER'] = $backup['PHP_AUTH_USER'];
$_SERVER['PHP_AUTH_PW'] = $backup['PHP_AUTH_PW'];
}
return true;
break;
case Zend_Cache::CLEANING_MODE_OLD:
$this->_log("Zend_Cache_Backend_Xcache::clean() : CLEANING_MODE_OLD is unsupported by the Xcache backend");
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$this->_log(self::TAGS_UNSUPPORTED_BY_CLEAN_OF_XCACHE_BACKEND);
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
/**
* Return true if the automatic cleaning is available for the backend
*
* @return boolean
*/
public function isAutomaticCleaningAvailable()
{
return false;
}
}

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@ -0,0 +1,316 @@
<?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_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend.php';
/**
* @see Zend_Cache_Backend_Interface
*/
require_once 'Zend/Cache/Backend/Interface.php';
/**
* Impementation of Zend Cache Backend using the Zend Platform (Output Content Caching)
*
* @package Zend_Cache
* @subpackage Zend_Cache_Backend
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Cache_Backend_ZendPlatform extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
{
/**
* internal ZP prefix
*/
const TAGS_PREFIX = "internal_ZPtag:";
/**
* Constructor
* Validate that the Zend Platform is loaded and licensed
*
* @param array $options Associative array of options
* @throws Zend_Cache_Exception
* @return void
*/
public function __construct(array $options = array())
{
if (!function_exists('accelerator_license_info')) {
Zend_Cache::throwException('The Zend Platform extension must be loaded for using this backend !');
}
if (!function_exists('accelerator_get_configuration')) {
$licenseInfo = accelerator_license_info();
Zend_Cache::throwException('The Zend Platform extension is not loaded correctly: '.$licenseInfo['failure_reason']);
}
$accConf = accelerator_get_configuration();
if (@!$accConf['output_cache_licensed']) {
Zend_Cache::throwException('The Zend Platform extension does not have the proper license to use content caching features');
}
if (@!$accConf['output_cache_enabled']) {
Zend_Cache::throwException('The Zend Platform content caching feature must be enabled for using this backend, set the \'zend_accelerator.output_cache_enabled\' directive to On !');
}
if (!is_writable($accConf['output_cache_dir'])) {
Zend_Cache::throwException('The cache copies directory \''. ini_get('zend_accelerator.output_cache_dir') .'\' must be writable !');
}
parent:: __construct($options);
}
/**
* Test if a cache is available for the given id and (if yes) return it (false else)
*
* @param string $id Cache id
* @param boolean $doNotTestCacheValidity If set to true, the cache validity won't be tested
* @return string Cached data (or false)
*/
public function load($id, $doNotTestCacheValidity = false)
{
// doNotTestCacheValidity implemented by giving zero lifetime to the cache
if ($doNotTestCacheValidity) {
$lifetime = 0;
} else {
$lifetime = $this->_directives['lifetime'];
}
$res = output_cache_get($id, $lifetime);
if($res) {
return $res[0];
} else {
return false;
}
}
/**
* Test if a cache is available or not (for the given id)
*
* @param string $id Cache id
* @return mixed|false false (a cache is not available) or "last modified" timestamp (int) of the available cache record
*/
public function test($id)
{
$result = output_cache_get($id, $this->_directives['lifetime']);
if ($result) {
return $result[1];
}
return false;
}
/**
* Save some string datas into a cache record
*
* Note : $data is always "string" (serialization is done by the
* core not by the backend)
*
* @param string $data Data to cache
* @param string $id Cache id
* @param array $tags Array of strings, the cache record will be tagged by each string entry
* @param int $specificLifetime If != false, set a specific lifetime for this cache record (null => infinite lifetime)
* @return boolean true if no problem
*/
public function save($data, $id, $tags = array(), $specificLifetime = false)
{
if (!($specificLifetime === false)) {
$this->_log("Zend_Cache_Backend_ZendPlatform::save() : non false specifc lifetime is unsuported for this backend");
}
$lifetime = $this->_directives['lifetime'];
$result1 = output_cache_put($id, array($data, time()));
$result2 = (count($tags) == 0);
foreach ($tags as $tag) {
$tagid = self::TAGS_PREFIX.$tag;
$old_tags = output_cache_get($tagid, $lifetime);
if ($old_tags === false) {
$old_tags = array();
}
$old_tags[$id] = $id;
output_cache_remove_key($tagid);
$result2 = output_cache_put($tagid, $old_tags);
}
return $result1 && $result2;
}
/**
* Remove a cache record
*
* @param string $id Cache id
* @return boolean True if no problem
*/
public function remove($id)
{
return output_cache_remove_key($id);
}
/**
* Clean some cache records
*
* Available modes are :
* Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used)
* Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used)
* This mode is not supported in this backend
* Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags
* ($tags can be an array of strings or a single string)
* Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => unsupported
* Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags
* ($tags can be an array of strings or a single string)
*
* @param string $mode Clean mode
* @param array $tags Array of tags
* @throws Zend_Cache_Exception
* @return boolean True if no problem
*/
public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
{
switch ($mode) {
case Zend_Cache::CLEANING_MODE_ALL:
case Zend_Cache::CLEANING_MODE_OLD:
$cache_dir = ini_get('zend_accelerator.output_cache_dir');
if (!$cache_dir) {
return false;
}
$cache_dir .= '/.php_cache_api/';
return $this->_clean($cache_dir, $mode);
break;
case Zend_Cache::CLEANING_MODE_MATCHING_TAG:
$idlist = null;
foreach ($tags as $tag) {
$next_idlist = output_cache_get(self::TAGS_PREFIX.$tag, $this->_directives['lifetime']);
if ($idlist) {
$idlist = array_intersect_assoc($idlist, $next_idlist);
} else {
$idlist = $next_idlist;
}
if (count($idlist) == 0) {
// if ID list is already empty - we may skip checking other IDs
$idlist = null;
break;
}
}
if ($idlist) {
foreach ($idlist as $id) {
output_cache_remove_key($id);
}
}
return true;
break;
case Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG:
$this->_log("Zend_Cache_Backend_ZendPlatform::clean() : CLEANING_MODE_NOT_MATCHING_TAG is not supported by the Zend Platform backend");
return false;
break;
case Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG:
$idlist = null;
foreach ($tags as $tag) {
$next_idlist = output_cache_get(self::TAGS_PREFIX.$tag, $this->_directives['lifetime']);
if ($idlist) {
$idlist = array_merge_recursive($idlist, $next_idlist);
} else {
$idlist = $next_idlist;
}
if (count($idlist) == 0) {
// if ID list is already empty - we may skip checking other IDs
$idlist = null;
break;
}
}
if ($idlist) {
foreach ($idlist as $id) {
output_cache_remove_key($id);
}
}
return true;
break;
default:
Zend_Cache::throwException('Invalid mode for clean() method');
break;
}
}
/**
* Clean a directory and recursivly go over it's subdirectories
*
* Remove all the cached files that need to be cleaned (according to mode and files mtime)
*
* @param string $dir Path of directory ot clean
* @param string $mode The same parameter as in Zend_Cache_Backend_ZendPlatform::clean()
* @return boolean True if ok
*/
private function _clean($dir, $mode)
{
$d = @dir($dir);
if (!$d) {
return false;
}
$result = true;
while (false !== ($file = $d->read())) {
if ($file == '.' || $file == '..') {
continue;
}
$file = $d->path . $file;
if (is_dir($file)) {
$result = ($this->_clean($file .'/', $mode)) && ($result);
} else {
if ($mode == Zend_Cache::CLEANING_MODE_ALL) {
$result = ($this->_remove($file)) && ($result);
} else if ($mode == Zend_Cache::CLEANING_MODE_OLD) {
// Files older than lifetime get deleted from cache
if (!is_null($this->_directives['lifetime'])) {
if ((time() - @filemtime($file)) > $this->_directives['lifetime']) {
$result = ($this->_remove($file)) && ($result);
}
}
}
}
}
$d->close();
return $result;
}
/**
* Remove a file
*
* If we can't remove the file (because of locks or any problem), we will touch
* the file to invalidate it
*
* @param string $file Complete file path
* @return boolean True if ok
*/
private function _remove($file)
{
if (!@unlink($file)) {
# If we can't remove the file (because of locks or any problem), we will touch
# the file to invalidate it
$this->_log("Zend_Cache_Backend_ZendPlatform::_remove() : we can't remove $file => we are going to try to invalidate it");
if (is_null($this->_directives['lifetime'])) {
return false;
}
if (!file_exists($file)) {
return false;
}
return @touch($file, time() - 2*abs($this->_directives['lifetime']));
}
return true;
}
}