david
28b02db2ea
git-svn-id: https://192.168.0.254/svn/Proyectos.Incam_SGD/tags/3.7.0.2_original@1 eb19766c-00d9-a042-a3a0-45cb8ec72764
236 lines
8.1 KiB
PHP
236 lines
8.1 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Cache
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* @subpackage Backend
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* @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/**
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* Zend_Cache_Backend_Interface
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*/
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require_once 'Zend/Cache/Backend/Interface.php';
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/**
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* Zend_Cache_Backend
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*/
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require_once 'Zend/Cache/Backend.php';
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/**
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* @package Zend_Cache
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* @subpackage Backend
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* @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Cache_Backend_Memcached extends Zend_Cache_Backend implements Zend_Cache_Backend_Interface
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{
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// -----------------
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// --- Constants ---
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// -----------------
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const DEFAULT_HOST = '127.0.0.1';
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const DEFAULT_PORT = 11211;
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const DEFAULT_PERSISTENT = true;
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// ------------------
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// --- Properties ---
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// ------------------
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/**
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* Available options
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*
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* =====> (array) servers :
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* an array of memcached server ; each memcached server is described by an associative array :
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* 'host' => (string) : the name of the memcached server
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* 'port' => (int) : the port of the memcached server
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* 'persistent' => (bool) : use or not persistent connections to this memcached server
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*
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* =====> (boolean) compression :
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* true if you want to use on-the-fly compression
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*
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* @var array available options
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*/
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protected $_options = array(
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'servers' => array(array(
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'host' => Zend_Cache_Backend_Memcached::DEFAULT_HOST,
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'port' => Zend_Cache_Backend_Memcached::DEFAULT_PORT,
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'persistent' => Zend_Cache_Backend_Memcached::DEFAULT_PERSISTENT
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)),
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'compression' => false
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);
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/**
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* Memcache object
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*
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* @var mixed memcache object
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*/
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private $_memcache = null;
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// ----------------------
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// --- Public methods ---
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// ----------------------
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/**
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* Constructor
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*
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* @param array $options associative array of options
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*/
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public function __construct($options = array())
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{
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if (!extension_loaded('memcache')) {
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Zend_Cache::throwException('The memcache extension must be loaded for using this backend !');
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}
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parent::__construct($options);
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if (isset($options['servers'])) {
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$value= $options['servers'];
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if (isset($value['host'])) {
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// in this case, $value seems to be a simple associative array (one server only)
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$value = array(0 => $value); // let's transform it into a classical array of associative arrays
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}
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$this->setOption('servers', $value);
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}
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$this->_memcache = new Memcache;
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foreach ($this->_options['servers'] as $server) {
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if (!array_key_exists('persistent', $server)) {
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$server['persistent'] = Zend_Cache_Backend_Memcached::DEFAULT_PERSISTENT;
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}
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if (!array_key_exists('port', $server)) {
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$server['port'] = Zend_Cache_Backend_Memcached::DEFAULT_PORT;
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}
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$this->_memcache->addServer($server['host'], $server['port'], $server['persistent']);
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}
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}
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/**
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* Test if a cache is available for the given id and (if yes) return it (false else)
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*
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* @param string $id cache id
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* @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
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* @return string cached datas (or false)
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*/
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public function load($id, $doNotTestCacheValidity = false)
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{
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// WARNING : $doNotTestCacheValidity is not supported !!!
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if ($doNotTestCacheValidity) {
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if ($this->_directives['logging']) {
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Zend_Log::log("Zend_Cache_Backend_Memcached::load() : \$doNotTestCacheValidity=true is unsupported by the Memcached backend", Zend_Log::LEVEL_WARNING);
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}
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}
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$tmp = $this->_memcache->get($id);
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if (is_array($tmp)) {
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return $tmp[0];
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}
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return false;
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}
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/**
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* Test if a cache is available or not (for the given id)
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*
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* @param string $id cache id
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* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
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*/
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public function test($id)
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{
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$tmp = $this->_memcache->get($id);
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if (is_array($tmp)) {
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return $tmp[1];
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}
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return false;
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}
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/**
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* Save some string datas into a cache record
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*
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* Note : $data is always "string" (serialization is done by the
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* core not by the backend)
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*
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* @param string $data datas to cache
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* @param string $id cache id
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* @param array $tags array of strings, the cache record will be tagged by each string entry
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* @param int $specificLifetime if != false, set a specific lifetime for this cache record (null => infinite lifetime)
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* @return boolean true if no problem
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*/
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public function save($data, $id, $tags = array(), $specificLifetime = false)
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{
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$lifetime = $this->getLifetime($specificLifetime);
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if ($this->_options['compression']) {
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$flag = MEMCACHE_COMPRESSED;
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} else {
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$flag = 0;
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}
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$result = $this->_memcache->set($id, array($data, time()), $flag, $lifetime);
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if (count($tags) > 0) {
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if ($this->_directives['logging']) {
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Zend_Log::log("Zend_Cache_Backend_Memcached::save() : tags are unsupported by the Memcached backend", Zend_Log::LEVEL_WARNING);
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}
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}
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return $result;
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}
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/**
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* Remove a cache record
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*
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* @param string $id cache id
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* @return boolean true if no problem
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*/
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public function remove($id)
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{
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return $this->_memcache->delete($id);
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}
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/**
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* Clean some cache records
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*
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* Available modes are :
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* 'all' (default) => remove all cache entries ($tags is not used)
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* 'old' => remove too old cache entries ($tags is not used)
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* 'matchingTag' => remove cache entries matching all given tags
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* ($tags can be an array of strings or a single string)
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* 'notMatchingTag' => remove cache entries not matching one of the given tags
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* ($tags can be an array of strings or a single string)
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*
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* @param string $mode clean mode
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* @param tags array $tags array of tags
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* @return boolean true if no problem
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*/
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public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
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{
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if ($mode==Zend_Cache::CLEANING_MODE_ALL) {
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return $this->_memcache->flush();
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}
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if ($mode==Zend_Cache::CLEANING_MODE_OLD) {
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if ($this->_directives['logging']) {
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Zend_Log::log("Zend_Cache_Backend_Memcached::clean() : CLEANING_MODE_OLD is unsupported by the Memcached backend", Zend_Log::LEVEL_WARNING);
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}
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}
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if ($mode==Zend_Cache::CLEANING_MODE_MATCHING_TAG) {
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if ($this->_directives['logging']) {
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Zend_Log::log("Zend_Cache_Backend_Memcached::clean() : tags are unsupported by the Memcached backend", Zend_Log::LEVEL_WARNING);
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}
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}
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if ($mode==Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG) {
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if ($this->_directives['logging']) {
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Zend_Log::log("Zend_Cache_Backend_Memcached::clean() : tags are unsupported by the Memcached backend", Zend_Log::LEVEL_WARNING);
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}
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}
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}
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}
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