mirror of
https://github.com/kamilwylegala/cakephp2-php8.git
synced 2024-11-15 03:18:26 +00:00
500 lines
16 KiB
PHP
500 lines
16 KiB
PHP
<?php
|
|
/**
|
|
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
|
|
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
|
|
*
|
|
* Licensed under The MIT License
|
|
* Redistributions of files must retain the above copyright notice.
|
|
*
|
|
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
|
|
* @link http://cakephp.org CakePHP(tm) Project
|
|
* @package Cake.Cache
|
|
* @since CakePHP(tm) v 1.2.0.4933
|
|
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
|
|
*/
|
|
|
|
App::uses('Inflector', 'Utility');
|
|
App::uses('CacheEngine', 'Cache');
|
|
|
|
/**
|
|
* Cache provides a consistent interface to Caching in your application. It allows you
|
|
* to use several different Cache engines, without coupling your application to a specific
|
|
* implementation. It also allows you to change out cache storage or configuration without effecting
|
|
* the rest of your application.
|
|
*
|
|
* You can configure Cache engines in your application's `bootstrap.php` file. A sample configuration would
|
|
* be
|
|
*
|
|
* {{{
|
|
* Cache::config('shared', array(
|
|
* 'engine' => 'Apc',
|
|
* 'prefix' => 'my_app_'
|
|
* ));
|
|
* }}}
|
|
*
|
|
* This would configure an APC cache engine to the 'shared' alias. You could then read and write
|
|
* to that cache alias by using it for the `$config` parameter in the various Cache methods. In
|
|
* general all Cache operations are supported by all cache engines. However, Cache::increment() and
|
|
* Cache::decrement() are not supported by File caching.
|
|
*
|
|
* @package Cake.Cache
|
|
*/
|
|
class Cache {
|
|
|
|
/**
|
|
* Cache configuration stack
|
|
* Keeps the permanent/default settings for each cache engine.
|
|
* These settings are used to reset the engines after temporary modification.
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $_config = array();
|
|
|
|
/**
|
|
* Whether to reset the settings with the next call to Cache::set();
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $_reset = false;
|
|
|
|
/**
|
|
* Engine instances keyed by configuration name.
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $_engines = array();
|
|
|
|
/**
|
|
* Set the cache configuration to use. config() can
|
|
* both create new configurations, return the settings for already configured
|
|
* configurations.
|
|
*
|
|
* To create a new configuration, or to modify an existing configuration permanently:
|
|
*
|
|
* `Cache::config('my_config', array('engine' => 'File', 'path' => TMP));`
|
|
*
|
|
* If you need to modify a configuration temporarily, use Cache::set().
|
|
* To get the settings for a configuration:
|
|
*
|
|
* `Cache::config('default');`
|
|
*
|
|
* There are 5 built-in caching engines:
|
|
*
|
|
* - `FileEngine` - Uses simple files to store content. Poor performance, but good for
|
|
* storing large objects, or things that are not IO sensitive.
|
|
* - `ApcEngine` - Uses the APC object cache, one of the fastest caching engines.
|
|
* - `MemcacheEngine` - Uses the PECL::Memcache extension and Memcached for storage.
|
|
* Fast reads/writes, and benefits from memcache being distributed.
|
|
* - `XcacheEngine` - Uses the Xcache extension, an alternative to APC.
|
|
* - `WincacheEngine` - Uses Windows Cache Extension for PHP. Supports wincache 1.1.0 and higher.
|
|
*
|
|
* The following keys are used in core cache engines:
|
|
*
|
|
* - `duration` Specify how long items in this cache configuration last.
|
|
* - `groups` List of groups or 'tags' associated to every key stored in this config.
|
|
* handy for deleting a complete group from cache.
|
|
* - `prefix` Prefix appended to all entries. Good for when you need to share a keyspace
|
|
* with either another cache config or another application.
|
|
* - `probability` Probability of hitting a cache gc cleanup. Setting to 0 will disable
|
|
* cache::gc from ever being called automatically.
|
|
* - `servers' Used by memcache. Give the address of the memcached servers to use.
|
|
* - `compress` Used by memcache. Enables memcache's compressed format.
|
|
* - `serialize` Used by FileCache. Should cache objects be serialized first.
|
|
* - `path` Used by FileCache. Path to where cachefiles should be saved.
|
|
* - `lock` Used by FileCache. Should files be locked before writing to them?
|
|
* - `user` Used by Xcache. Username for XCache
|
|
* - `password` Used by Xcache. Password for XCache
|
|
*
|
|
* @see app/Config/core.php for configuration settings
|
|
* @param string $name Name of the configuration
|
|
* @param array $settings Optional associative array of settings passed to the engine
|
|
* @return array(engine, settings) on success, false on failure
|
|
* @throws CacheException
|
|
*/
|
|
public static function config($name = null, $settings = array()) {
|
|
if (is_array($name)) {
|
|
$settings = $name;
|
|
}
|
|
|
|
$current = array();
|
|
if (isset(self::$_config[$name])) {
|
|
$current = self::$_config[$name];
|
|
}
|
|
|
|
if (!empty($settings)) {
|
|
self::$_config[$name] = array_merge($current, $settings);
|
|
}
|
|
|
|
if (empty(self::$_config[$name]['engine'])) {
|
|
return false;
|
|
}
|
|
|
|
$engine = self::$_config[$name]['engine'];
|
|
|
|
if (!isset(self::$_engines[$name])) {
|
|
self::_buildEngine($name);
|
|
$settings = self::$_config[$name] = self::settings($name);
|
|
} elseif ($settings = self::set(self::$_config[$name], null, $name)) {
|
|
self::$_config[$name] = $settings;
|
|
}
|
|
return compact('engine', 'settings');
|
|
}
|
|
|
|
/**
|
|
* Finds and builds the instance of the required engine class.
|
|
*
|
|
* @param string $name Name of the config array that needs an engine instance built
|
|
* @return boolean
|
|
* @throws CacheException
|
|
*/
|
|
protected static function _buildEngine($name) {
|
|
$config = self::$_config[$name];
|
|
|
|
list($plugin, $class) = pluginSplit($config['engine'], true);
|
|
$cacheClass = $class . 'Engine';
|
|
App::uses($cacheClass, $plugin . 'Cache/Engine');
|
|
if (!class_exists($cacheClass)) {
|
|
return false;
|
|
}
|
|
$cacheClass = $class . 'Engine';
|
|
if (!is_subclass_of($cacheClass, 'CacheEngine')) {
|
|
throw new CacheException(__d('cake_dev', 'Cache engines must use CacheEngine as a base class.'));
|
|
}
|
|
self::$_engines[$name] = new $cacheClass();
|
|
if (self::$_engines[$name]->init($config)) {
|
|
if (self::$_engines[$name]->settings['probability'] && time() % self::$_engines[$name]->settings['probability'] === 0) {
|
|
self::$_engines[$name]->gc();
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the currently configured Cache settings.
|
|
*
|
|
* @return array Array of configured Cache config names.
|
|
*/
|
|
public static function configured() {
|
|
return array_keys(self::$_config);
|
|
}
|
|
|
|
/**
|
|
* Drops a cache engine. Deletes the cache configuration information
|
|
* If the deleted configuration is the last configuration using an certain engine,
|
|
* the Engine instance is also unset.
|
|
*
|
|
* @param string $name A currently configured cache config you wish to remove.
|
|
* @return boolean success of the removal, returns false when the config does not exist.
|
|
*/
|
|
public static function drop($name) {
|
|
if (!isset(self::$_config[$name])) {
|
|
return false;
|
|
}
|
|
unset(self::$_config[$name], self::$_engines[$name]);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Temporarily change the settings on a cache config. The settings will persist for the next write
|
|
* operation (write, decrement, increment, clear). Any reads that are done before the write, will
|
|
* use the modified settings. If `$settings` is empty, the settings will be reset to the
|
|
* original configuration.
|
|
*
|
|
* Can be called with 2 or 3 parameters. To set multiple values at once.
|
|
*
|
|
* `Cache::set(array('duration' => '+30 minutes'), 'my_config');`
|
|
*
|
|
* Or to set one value.
|
|
*
|
|
* `Cache::set('duration', '+30 minutes', 'my_config');`
|
|
*
|
|
* To reset a config back to the originally configured values.
|
|
*
|
|
* `Cache::set(null, 'my_config');`
|
|
*
|
|
* @param mixed $settings Optional string for simple name-value pair or array
|
|
* @param string $value Optional for a simple name-value pair
|
|
* @param string $config The configuration name you are changing. Defaults to 'default'
|
|
* @return array Array of settings.
|
|
*/
|
|
public static function set($settings = array(), $value = null, $config = 'default') {
|
|
if (is_array($settings) && $value !== null) {
|
|
$config = $value;
|
|
}
|
|
if (!isset(self::$_config[$config]) || !isset(self::$_engines[$config])) {
|
|
return false;
|
|
}
|
|
if (!empty($settings)) {
|
|
self::$_reset = true;
|
|
}
|
|
|
|
if (self::$_reset === true) {
|
|
if (empty($settings)) {
|
|
self::$_reset = false;
|
|
$settings = self::$_config[$config];
|
|
} else {
|
|
if (is_string($settings) && $value !== null) {
|
|
$settings = array($settings => $value);
|
|
}
|
|
$settings = array_merge(self::$_config[$config], $settings);
|
|
if (isset($settings['duration']) && !is_numeric($settings['duration'])) {
|
|
$settings['duration'] = strtotime($settings['duration']) - time();
|
|
}
|
|
}
|
|
self::$_engines[$config]->settings = $settings;
|
|
}
|
|
return self::settings($config);
|
|
}
|
|
|
|
/**
|
|
* Garbage collection
|
|
*
|
|
* Permanently remove all expired and deleted data
|
|
*
|
|
* @param string $config The config name you wish to have garbage collected. Defaults to 'default'
|
|
* @return void
|
|
*/
|
|
public static function gc($config = 'default') {
|
|
self::$_engines[$config]->gc();
|
|
}
|
|
|
|
/**
|
|
* Write data for key into cache. Will automatically use the currently
|
|
* active cache configuration. To set the currently active configuration use
|
|
* Cache::config()
|
|
*
|
|
* ### Usage:
|
|
*
|
|
* Writing to the active cache config:
|
|
*
|
|
* `Cache::write('cached_data', $data);`
|
|
*
|
|
* Writing to a specific cache config:
|
|
*
|
|
* `Cache::write('cached_data', $data, 'long_term');`
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param mixed $value Data to be cached - anything except a resource
|
|
* @param string $config Optional string configuration name to write to. Defaults to 'default'
|
|
* @return boolean True if the data was successfully cached, false on failure
|
|
*/
|
|
public static function write($key, $value, $config = 'default') {
|
|
$settings = self::settings($config);
|
|
|
|
if (empty($settings)) {
|
|
return false;
|
|
}
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$key = self::$_engines[$config]->key($key);
|
|
|
|
if (!$key || is_resource($value)) {
|
|
return false;
|
|
}
|
|
|
|
$success = self::$_engines[$config]->write($settings['prefix'] . $key, $value, $settings['duration']);
|
|
self::set(null, $config);
|
|
if ($success === false && $value !== '') {
|
|
trigger_error(
|
|
__d('cake_dev',
|
|
"%s cache was unable to write '%s' to %s cache",
|
|
$config,
|
|
$key,
|
|
self::$_engines[$config]->settings['engine']
|
|
),
|
|
E_USER_WARNING
|
|
);
|
|
}
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Read a key from the cache. Will automatically use the currently
|
|
* active cache configuration. To set the currently active configuration use
|
|
* Cache::config()
|
|
*
|
|
* ### Usage:
|
|
*
|
|
* Reading from the active cache configuration.
|
|
*
|
|
* `Cache::read('my_data');`
|
|
*
|
|
* Reading from a specific cache configuration.
|
|
*
|
|
* `Cache::read('my_data', 'long_term');`
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param string $config optional name of the configuration to use. Defaults to 'default'
|
|
* @return mixed The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it
|
|
*/
|
|
public static function read($key, $config = 'default') {
|
|
$settings = self::settings($config);
|
|
|
|
if (empty($settings)) {
|
|
return false;
|
|
}
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$key = self::$_engines[$config]->key($key);
|
|
if (!$key) {
|
|
return false;
|
|
}
|
|
return self::$_engines[$config]->read($settings['prefix'] . $key);
|
|
}
|
|
|
|
/**
|
|
* Increment a number under the key and return incremented value.
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param integer $offset How much to add
|
|
* @param string $config Optional string configuration name. Defaults to 'default'
|
|
* @return mixed new value, or false if the data doesn't exist, is not integer,
|
|
* or if there was an error fetching it.
|
|
*/
|
|
public static function increment($key, $offset = 1, $config = 'default') {
|
|
$settings = self::settings($config);
|
|
|
|
if (empty($settings)) {
|
|
return false;
|
|
}
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$key = self::$_engines[$config]->key($key);
|
|
|
|
if (!$key || !is_integer($offset) || $offset < 0) {
|
|
return false;
|
|
}
|
|
$success = self::$_engines[$config]->increment($settings['prefix'] . $key, $offset);
|
|
self::set(null, $config);
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Decrement a number under the key and return decremented value.
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param integer $offset How much to subtract
|
|
* @param string $config Optional string configuration name. Defaults to 'default'
|
|
* @return mixed new value, or false if the data doesn't exist, is not integer,
|
|
* or if there was an error fetching it
|
|
*/
|
|
public static function decrement($key, $offset = 1, $config = 'default') {
|
|
$settings = self::settings($config);
|
|
|
|
if (empty($settings)) {
|
|
return false;
|
|
}
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$key = self::$_engines[$config]->key($key);
|
|
|
|
if (!$key || !is_integer($offset) || $offset < 0) {
|
|
return false;
|
|
}
|
|
$success = self::$_engines[$config]->decrement($settings['prefix'] . $key, $offset);
|
|
self::set(null, $config);
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Delete a key from the cache.
|
|
*
|
|
* ### Usage:
|
|
*
|
|
* Deleting from the active cache configuration.
|
|
*
|
|
* `Cache::delete('my_data');`
|
|
*
|
|
* Deleting from a specific cache configuration.
|
|
*
|
|
* `Cache::delete('my_data', 'long_term');`
|
|
*
|
|
* @param string $key Identifier for the data
|
|
* @param string $config name of the configuration to use. Defaults to 'default'
|
|
* @return boolean True if the value was successfully deleted, false if it didn't exist or couldn't be removed
|
|
*/
|
|
public static function delete($key, $config = 'default') {
|
|
$settings = self::settings($config);
|
|
|
|
if (empty($settings)) {
|
|
return false;
|
|
}
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$key = self::$_engines[$config]->key($key);
|
|
if (!$key) {
|
|
return false;
|
|
}
|
|
|
|
$success = self::$_engines[$config]->delete($settings['prefix'] . $key);
|
|
self::set(null, $config);
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Delete all keys from the cache.
|
|
*
|
|
* @param boolean $check if true will check expiration, otherwise delete all
|
|
* @param string $config name of the configuration to use. Defaults to 'default'
|
|
* @return boolean True if the cache was successfully cleared, false otherwise
|
|
*/
|
|
public static function clear($check = false, $config = 'default') {
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$success = self::$_engines[$config]->clear($check);
|
|
self::set(null, $config);
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Delete all keys from the cache belonging to the same group.
|
|
*
|
|
* @param string $group name of the group to be cleared
|
|
* @param string $config name of the configuration to use. Defaults to 'default'
|
|
* @return boolean True if the cache group was successfully cleared, false otherwise
|
|
*/
|
|
public static function clearGroup($group, $config = 'default') {
|
|
if (!self::isInitialized($config)) {
|
|
return false;
|
|
}
|
|
$success = self::$_engines[$config]->clearGroup($group);
|
|
self::set(null, $config);
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* Check if Cache has initialized a working config for the given name.
|
|
*
|
|
* @param string $config name of the configuration to use. Defaults to 'default'
|
|
* @return boolean Whether or not the config name has been initialized.
|
|
*/
|
|
public static function isInitialized($config = 'default') {
|
|
if (Configure::read('Cache.disable')) {
|
|
return false;
|
|
}
|
|
return isset(self::$_engines[$config]);
|
|
}
|
|
|
|
/**
|
|
* Return the settings for the named cache engine.
|
|
*
|
|
* @param string $name Name of the configuration to get settings for. Defaults to 'default'
|
|
* @return array list of settings for this engine
|
|
* @see Cache::config()
|
|
*/
|
|
public static function settings($name = 'default') {
|
|
if (!empty(self::$_engines[$name])) {
|
|
return self::$_engines[$name]->settings();
|
|
}
|
|
return array();
|
|
}
|
|
|
|
}
|
|
|