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  • Committer: galaxyAbstractor
  • Date: 2013-04-10 15:49:32 UTC
  • mto: (19.1.5 lenasys)
  • mto: This revision was merged to the branch mainline in revision 23.
  • Revision ID: galaxyabstractor@gmail.com-20130410154932-4vizlzk0ar5gykvi
* Added an simple admin panel to the codeviewer-cmssy stuff
* Redesigned a bit like the mockups - still stuff to come
* Implemented the codeviewer + admin panel again using the Framework CodeIgniter instead 

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codeigniter/system/libraries/Cache/drivers/Cache_memcached.php
 
1
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 
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/**
 
3
 * CodeIgniter
 
4
 *
 
5
 * An open source application development framework for PHP 4.3.2 or newer
 
6
 *
 
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 * @package             CodeIgniter
 
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 * @author              ExpressionEngine Dev Team
 
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 * @copyright   Copyright (c) 2006 - 2012 EllisLab, Inc.
 
10
 * @license             http://codeigniter.com/user_guide/license.html
 
11
 * @link                http://codeigniter.com
 
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 * @since               Version 2.0
 
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 * @filesource  
 
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 */
 
15
 
 
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// ------------------------------------------------------------------------
 
17
 
 
18
/**
 
19
 * CodeIgniter Memcached Caching Class 
 
20
 *
 
21
 * @package             CodeIgniter
 
22
 * @subpackage  Libraries
 
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 * @category    Core
 
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 * @author              ExpressionEngine Dev Team
 
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 * @link                
 
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 */
 
27
 
 
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class CI_Cache_memcached extends CI_Driver {
 
29
 
 
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        private $_memcached;    // Holds the memcached object
 
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        protected $_memcache_conf       = array(
 
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                                        'default' => array(
 
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                                                'default_host'          => '127.0.0.1',
 
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                                                'default_port'          => 11211,
 
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                                                'default_weight'        => 1
 
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                                        )
 
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                                );
 
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        // ------------------------------------------------------------------------     
 
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        /**
 
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         * Fetch from cache
 
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         *
 
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         * @param       mixed           unique key id
 
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         * @return      mixed           data on success/false on failure
 
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         */     
 
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        public function get($id)
 
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        {       
 
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                $data = $this->_memcached->get($id);
 
51
                
 
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                return (is_array($data)) ? $data[0] : FALSE;
 
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        }
 
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55
        // ------------------------------------------------------------------------
 
56
 
 
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        /**
 
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         * Save
 
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         *
 
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         * @param       string          unique identifier
 
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         * @param       mixed           data being cached
 
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         * @param       int                     time to live
 
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         * @return      boolean         true on success, false on failure
 
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         */
 
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        public function save($id, $data, $ttl = 60)
 
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        {
 
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                if (get_class($this->_memcached) == 'Memcached')
 
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                {
 
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                        return $this->_memcached->set($id, array($data, time(), $ttl), $ttl);
 
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                }
 
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                else if (get_class($this->_memcached) == 'Memcache')
 
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                {
 
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                        return $this->_memcached->set($id, array($data, time(), $ttl), 0, $ttl);
 
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                }
 
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                return FALSE;
 
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        }
 
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        // ------------------------------------------------------------------------
 
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        /**
 
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         * Delete from Cache
 
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         *
 
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         * @param       mixed           key to be deleted.
 
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         * @return      boolean         true on success, false on failure
 
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         */
 
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        public function delete($id)
 
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        {
 
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                return $this->_memcached->delete($id);
 
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        }
 
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        // ------------------------------------------------------------------------
 
93
        
 
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        /**
 
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         * Clean the Cache
 
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         *
 
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         * @return      boolean         false on failure/true on success
 
98
         */
 
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        public function clean()
 
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        {
 
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                return $this->_memcached->flush();
 
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        }
 
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        // ------------------------------------------------------------------------
 
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        /**
 
107
         * Cache Info
 
108
         *
 
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         * @param       null            type not supported in memcached
 
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         * @return      mixed           array on success, false on failure
 
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         */
 
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        public function cache_info($type = NULL)
 
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        {
 
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                return $this->_memcached->getStats();
 
115
        }
 
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        // ------------------------------------------------------------------------
 
118
        
 
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        /**
 
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         * Get Cache Metadata
 
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         *
 
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         * @param       mixed           key to get cache metadata on
 
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         * @return      mixed           FALSE on failure, array on success.
 
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         */
 
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        public function get_metadata($id)
 
126
        {
 
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                $stored = $this->_memcached->get($id);
 
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                if (count($stored) !== 3)
 
130
                {
 
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                        return FALSE;
 
132
                }
 
133
 
 
134
                list($data, $time, $ttl) = $stored;
 
135
 
 
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                return array(
 
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                        'expire'        => $time + $ttl,
 
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                        'mtime'         => $time,
 
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                        'data'          => $data
 
140
                );
 
141
        }
 
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143
        // ------------------------------------------------------------------------
 
144
 
 
145
        /**
 
146
         * Setup memcached.
 
147
         */
 
148
        private function _setup_memcached()
 
149
        {
 
150
                // Try to load memcached server info from the config file.
 
151
                $CI =& get_instance();
 
152
                if ($CI->config->load('memcached', TRUE, TRUE))
 
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                {
 
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                        if (is_array($CI->config->config['memcached']))
 
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                        {
 
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                                $this->_memcache_conf = NULL;
 
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                                foreach ($CI->config->config['memcached'] as $name => $conf)
 
159
                                {
 
160
                                        $this->_memcache_conf[$name] = $conf;
 
161
                                }                               
 
162
                        }                       
 
163
                }
 
164
                
 
165
                $this->_memcached = new Memcached();
 
166
 
 
167
                foreach ($this->_memcache_conf as $name => $cache_server)
 
168
                {
 
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                        if ( ! array_key_exists('hostname', $cache_server))
 
170
                        {
 
171
                                $cache_server['hostname'] = $this->_default_options['default_host'];
 
172
                        }
 
173
        
 
174
                        if ( ! array_key_exists('port', $cache_server))
 
175
                        {
 
176
                                $cache_server['port'] = $this->_default_options['default_port'];
 
177
                        }
 
178
        
 
179
                        if ( ! array_key_exists('weight', $cache_server))
 
180
                        {
 
181
                                $cache_server['weight'] = $this->_default_options['default_weight'];
 
182
                        }
 
183
        
 
184
                        $this->_memcached->addServer(
 
185
                                        $cache_server['hostname'], $cache_server['port'], $cache_server['weight']
 
186
                        );
 
187
                }
 
188
        }
 
189
 
 
190
        // ------------------------------------------------------------------------
 
191
 
 
192
 
 
193
        /**
 
194
         * Is supported
 
195
         *
 
196
         * Returns FALSE if memcached is not supported on the system.
 
197
         * If it is, we setup the memcached object & return TRUE
 
198
         */
 
199
        public function is_supported()
 
200
        {
 
201
                if ( ! extension_loaded('memcached'))
 
202
                {
 
203
                        log_message('error', 'The Memcached Extension must be loaded to use Memcached Cache.');
 
204
                        
 
205
                        return FALSE;
 
206
                }
 
207
                
 
208
                $this->_setup_memcached();
 
209
                return TRUE;
 
210
        }
 
211
 
 
212
        // ------------------------------------------------------------------------
 
213
 
 
214
}
 
215
// End Class
 
216
 
 
217
/* End of file Cache_memcached.php */
 
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/* Location: ./system/libraries/Cache/drivers/Cache_memcached.php */
 
 
b'\\ No newline at end of file'