mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
synced 2024-11-15 11:28:25 +00:00
47c7387548
Removing php5 only keywords from test cases. Updating memcache tests, to correctly skip multiple server test when multiple memcached servers cannot be found.
632 lines
No EOL
16 KiB
PHP
632 lines
No EOL
16 KiB
PHP
<?php
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/**
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* Caching for CakePHP.
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*
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2009, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs
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* @since CakePHP(tm) v 1.2.0.4933
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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/**
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* Caching for CakePHP.
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*
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* @package cake
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* @subpackage cake.cake.libs
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*/
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class Cache {
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/**
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* Cache configuration stack
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* Keeps the permanent/default settings for each cache engine.
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* These settings are used to reset the engines after temporary modification.
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*
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* @var array
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* @access private
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*/
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var $__config = array();
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/**
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* Holds name of the current configuration name being used.
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*
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* @var array
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* @access private
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*/
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var $__name = 'default';
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/**
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* Whether to reset the settings with the next call to Cache::set();
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*
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* @var array
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* @access private
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*/
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var $__reset = false;
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/**
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* Engine instances keyed by configuration name.
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*
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* @var array
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*/
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var $_engines = array();
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/**
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* Returns a singleton instance
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*
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* @return object
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* @access public
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* @static
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*/
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function &getInstance() {
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static $instance = array();
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if (!$instance) {
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$instance[0] =& new Cache();
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}
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return $instance[0];
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}
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/**
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* Set the cache configuration to use. config() can
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* both create new configurations, return the settings for already configured
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* configurations. It also sets the 'default' configuration to use for subsequent
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* operations.
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*
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* To create a new configuration:
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*
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* `Cache::config('my_config', array('engine' => 'File', 'path' => TMP));`
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*
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* To get the settings for a configuration, and set it as the currently selected configuration
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*
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* `Cache::config('default');`
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*
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* @see app/config/core.php for configuration settings
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* @param string $name Name of the configuration
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* @param array $settings Optional associative array of settings passed to the engine
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* @return array(engine, settings) on success, false on failure
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* @access public
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* @static
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*/
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function config($name = null, $settings = array()) {
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$self =& Cache::getInstance();
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if (is_array($name)) {
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$settings = $name;
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}
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if ($name === null || !is_string($name)) {
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$name = $self->__name;
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}
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$current = array();
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if (isset($self->__config[$name])) {
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$current = $self->__config[$name];
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}
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if (!empty($settings)) {
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$self->__config[$name] = array_merge($current, $settings);
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}
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if (empty($self->__config[$name]['engine'])) {
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return false;
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}
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$engine = $self->__config[$name]['engine'];
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$self->__name = $name;
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if (!isset($self->_engines[$name])) {
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$self->_buildEngine($name);
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$settings = $self->__config[$name] = $self->settings($name);
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} elseif ($settings = $self->set($self->__config[$name])) {
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$self->__config[$name] = $settings;
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}
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return compact('engine', 'settings');
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}
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/**
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* Finds and builds the instance of the required engine class.
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*
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* @param string $name Name of the config array that needs an engine instance built
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* @return void
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* @access protected
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*/
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function _buildEngine($name) {
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$config = $this->__config[$name];
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list($plugin, $class) = pluginSplit($config['engine']);
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$cacheClass = $class . 'Engine';
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if (!class_exists($cacheClass) && $this->__loadEngine($class, $plugin) === false) {
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return false;
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}
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$cacheClass = $class . 'Engine';
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$this->_engines[$name] =& new $cacheClass();
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if ($this->_engines[$name]->init($config)) {
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if (time() % $this->_engines[$name]->settings['probability'] === 0) {
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$this->_engines[$name]->gc();
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}
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return true;
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}
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return false;
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}
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/**
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* Returns an array containing the currently configured Cache settings.
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*
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* @return array
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*/
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function configured() {
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$self = Cache::getInstance();
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return array_keys($self->__config);
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}
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/**
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* Drops a cache engine. Deletes the cache configuration information
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* If the deleted configuration is the last configuration using an certain engine,
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* the Engine instance is also unset.
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*
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* @param string $name A currently configured cache config you wish to remove.
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* @return boolen success of the removal, returns false when the config does not exist.
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*/
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function drop($name) {
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$self = Cache::getInstance();
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if (!isset($self->__config[$name])) {
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return false;
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}
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unset($self->__config[$name]);
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unset($self->_engines[$name]);
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return true;
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}
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/**
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* Tries to find and include a file for a cache engine and returns object instance
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*
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* @param $name Name of the engine (without 'Engine')
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* @return mixed $engine object or null
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* @access private
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*/
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function __loadEngine($name, $plugin = null) {
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if ($plugin) {
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return App::import('Lib', $plugin . '.cache' . DS . $name, false);
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} else {
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$core = App::core();
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$path = $core['libs'][0] . 'cache' . DS . strtolower($name) . '.php';
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if (file_exists($path)) {
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require $path;
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return true;
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}
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return App::import('Lib', 'cache' . DS . $name, false);
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}
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}
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/**
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* Temporarily change settings to current config options. if no params are passed, resets settings if needed
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* Cache::write() will reset the configuration changes made
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*
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* @param mixed $settings Optional string for simple name-value pair or array
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* @param string $value Optional for a simple name-value pair
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* @return array of settings
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* @access public
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* @static
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*/
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function set($settings = array(), $value = null) {
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$self =& Cache::getInstance();
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if (!isset($self->__config[$self->__name]) || !isset($self->_engines[$self->__name])) {
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return false;
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}
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$name = $self->__name;
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if (!empty($settings)) {
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$self->__reset = true;
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}
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if ($self->__reset === true) {
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if (empty($settings)) {
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$self->__reset = false;
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$settings = $self->__config[$name];
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} else {
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if (is_string($settings) && $value !== null) {
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$settings = array($settings => $value);
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}
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$settings = array_merge($self->__config[$self->__name], $settings);
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if (isset($settings['duration']) && !is_numeric($settings['duration'])) {
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$settings['duration'] = strtotime($settings['duration']) - time();
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}
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}
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$self->_engines[$name]->settings = $settings;
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}
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return $self->settings($name);
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}
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/**
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* Garbage collection
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*
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* Permanently remove all expired and deleted data
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*
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* @return void
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* @access public
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* @static
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*/
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function gc() {
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$self =& Cache::getInstance();
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$self->_engines[$self->__name]->gc();
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}
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/**
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* Write data for key into cache
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*
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* @param string $key Identifier for the data
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* @param mixed $value Data to be cached - anything except a resource
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* @param string $config Optional - string configuration name
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* @return boolean True if the data was successfully cached, false on failure
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* @access public
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* @static
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*/
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function write($key, $value, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$key = $self->_engines[$config]->key($key);
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if (!$key || is_resource($value) || $settings['duration'] < 1) {
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return false;
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}
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$success = $self->_engines[$config]->write($settings['prefix'] . $key, $value, $settings['duration']);
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$self->set();
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return $success;
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}
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/**
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* Read a key from the cache
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*
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* @param string $key Identifier for the data
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* @param string $config name of the configuration to use
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* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
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* @access public
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* @static
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*/
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function read($key, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$key = $self->_engines[$config]->key($key);
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if (!$key) {
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return false;
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}
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$success = $self->_engines[$config]->read($settings['prefix'] . $key);
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if ($config !== null && $config !== $self->__name) {
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$self->set();
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}
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return $success;
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}
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/**
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* Increment a number under the key and return incremented value
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*
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* @param string $key Identifier for the data
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* @param integer $offset How much to add
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* @param string $config Optional - string configuration name
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* @return mixed new value, or false if the data doesn't exist, is not integer, or if there was an error fetching it
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* @access public
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*/
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function increment($key, $offset = 1, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$key = $self->_engines[$config]->key($key);
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if (!$key || !is_integer($offset) || $offset < 0) {
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return false;
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}
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$success = $self->_engines[$config]->increment($settings['prefix'] . $key, $offset);
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$self->set();
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return $success;
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}
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/**
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* Decrement a number under the key and return decremented value
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*
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* @param string $key Identifier for the data
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* @param integer $offset How much to substract
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* @param string $config Optional - string configuration name
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* @return mixed new value, or false if the data doesn't exist, is not integer, or if there was an error fetching it
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* @access public
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*/
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function decrement($key, $offset = 1, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$key = $self->_engines[$config]->key($key);
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if (!$key || !is_integer($offset) || $offset < 0) {
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return false;
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}
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$success = $self->_engines[$config]->decrement($settings['prefix'] . $key, $offset);
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$self->set();
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return $success;
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}
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/**
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* Delete a key from the cache
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*
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* @param string $key Identifier for the data
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* @param string $config name of the configuration to use
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* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
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* @access public
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* @static
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*/
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function delete($key, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$key = $self->_engines[$config]->key($key);
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if (!$key) {
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return false;
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}
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$success = $self->_engines[$config]->delete($settings['prefix'] . $key);
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$self->set();
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return $success;
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}
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/**
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* Delete all keys from the cache
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*
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* @param boolean $check if true will check expiration, otherwise delete all
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* @param string $config name of the configuration to use
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* @return boolean True if the cache was succesfully cleared, false otherwise
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* @access public
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* @static
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*/
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function clear($check = false, $config = null) {
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$self =& Cache::getInstance();
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if (!$config) {
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$config = $self->__name;
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}
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$settings = $self->settings($config);
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if (empty($settings)) {
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return null;
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}
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if (!$self->isInitialized($config)) {
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return false;
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}
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$success = $self->_engines[$config]->clear($check);
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$self->set();
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return $success;
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}
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/**
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* Check if Cache has initialized a working config for the given name.
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*
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* @param string $engine Name of the engine
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* @param string $config Name of the configuration setting
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* @return bool
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* @access public
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* @static
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*/
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function isInitialized($name = null) {
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if (Configure::read('Cache.disable')) {
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return false;
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}
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$self =& Cache::getInstance();
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if (!$name && isset($self->__config[$self->__name])) {
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$name = $self->__name;
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}
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return isset($self->_engines[$name]);
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}
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/**
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* Return the settings for current cache engine. If no name is supplied the settings
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* for the 'active default' configuration will be returned. To set the 'active default'
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* configuration use `Cache::config()`
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*
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* @param string $engine Name of the configuration to get settings for.
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* @return array list of settings for this engine
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* @see Cache::config()
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* @access public
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* @static
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*/
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function settings($name = null) {
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$self =& Cache::getInstance();
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if (!$name && isset($self->__config[$self->__name])) {
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$name = $self->__name;
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}
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if (!empty($self->_engines[$name])) {
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return $self->_engines[$name]->settings();
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}
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return array();
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}
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}
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/**
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* Storage engine for CakePHP caching
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*
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* @package cake
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* @subpackage cake.cake.libs
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*/
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class CacheEngine {
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|
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/**
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* settings of current engine instance
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*
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* @var int
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* @access public
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*/
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var $settings = array();
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/**
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* Initialize the cache engine
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*
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* Called automatically by the cache frontend
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*
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* @param array $params Associative array of parameters for the engine
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* @return boolean True if the engine has been succesfully initialized, false if not
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* @access public
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*/
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function init($settings = array()) {
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$this->settings = array_merge(array('prefix' => 'cake_', 'duration'=> 3600, 'probability'=> 100), $this->settings, $settings);
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if (!is_numeric($this->settings['duration'])) {
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$this->settings['duration'] = strtotime($this->settings['duration']) - time();
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}
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return true;
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}
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/**
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* Garbage collection
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*
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* Permanently remove all expired and deleted data
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*
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* @access public
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*/
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function gc() {
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}
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/**
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* Write value for a key into cache
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*
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* @param string $key Identifier for the data
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* @param mixed $value Data to be cached
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* @param mixed $duration How long to cache the data, in seconds
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* @return boolean True if the data was succesfully cached, false on failure
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* @access public
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*/
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function write($key, &$value, $duration) {
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trigger_error(sprintf(__('Method write() not implemented in %s', true), get_class($this)), E_USER_ERROR);
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}
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/**
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* Read a key from the cache
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*
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* @param string $key Identifier for the data
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* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
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* @access public
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*/
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function read($key) {
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trigger_error(sprintf(__('Method read() not implemented in %s', true), get_class($this)), E_USER_ERROR);
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}
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/**
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* Increment a number under the key and return incremented value
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*
|
|
* @param string $key Identifier for the data
|
|
* @param integer $offset How much to add
|
|
* @return New incremented value, false otherwise
|
|
* @access public
|
|
*/
|
|
function increment($key, $offset = 1) {
|
|
trigger_error(sprintf(__('Method increment() not implemented in %s', true), get_class($this)), E_USER_ERROR);
|
|
}
|
|
/**
|
|
* Decrement a number under the key and return decremented value
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param integer $value How much to substract
|
|
* @return New incremented value, false otherwise
|
|
* @access public
|
|
*/
|
|
function decrement($key, $offset = 1) {
|
|
trigger_error(sprintf(__('Method decrement() not implemented in %s', true), get_class($this)), E_USER_ERROR);
|
|
}
|
|
/**
|
|
* Delete a key from the cache
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @return boolean True if the value was succesfully deleted, false if it didn't exist or couldn't be removed
|
|
* @access public
|
|
*/
|
|
function delete($key) {
|
|
}
|
|
|
|
/**
|
|
* Delete all keys from the cache
|
|
*
|
|
* @param boolean $check if true will check expiration, otherwise delete all
|
|
* @return boolean True if the cache was succesfully cleared, false otherwise
|
|
* @access public
|
|
*/
|
|
function clear($check) {
|
|
}
|
|
|
|
/**
|
|
* Cache Engine settings
|
|
*
|
|
* @return array settings
|
|
* @access public
|
|
*/
|
|
function settings() {
|
|
return $this->settings;
|
|
}
|
|
|
|
/**
|
|
* generates a safe key
|
|
*
|
|
* @param string $key the key passed over
|
|
* @return mixed string $key or false
|
|
* @access public
|
|
*/
|
|
function key($key) {
|
|
if (empty($key)) {
|
|
return false;
|
|
}
|
|
$key = Inflector::underscore(str_replace(array(DS, '/', '.'), '_', strval($key)));
|
|
return $key;
|
|
}
|
|
}
|
|
?>
|