      1: <?php
      2:
      3: /**
      4:  *
      5:  * An implementation of the AlphaCacheProviderInterface interface that uses Memcache as the
      6:  * target store.
      7:  *
      8:  * @package alpha::util::cache
      9:  * @since 1.1
     10:  * @author John Collins <dev@alphaframework.org>
     11:  * @version $Id: AlphaCacheProviderMemcache.inc 1548 2012-07-29 17:07:07Z alphadevx $
     12:  * @license http://www.opensource.org/licenses/bsd-license.php The BSD License
     13:  * @copyright Copyright (c) 2012, John Collins (founder of Alpha Framework).
     14:  * All rights reserved.
     15:  *
     16:  * <pre>
     17:  * Redistribution and use in source and binary forms, with or
     18:  * without modification, are permitted provided that the
     19:  * following conditions are met:
     20:  *
     21:  * * Redistributions of source code must retain the above
     22:  *   copyright notice, this list of conditions and the
     23:  *   following disclaimer.
     24:  * * Redistributions in binary form must reproduce the above
     25:  *   copyright notice, this list of conditions and the
     26:  *   following disclaimer in the documentation and/or other
     27:  *   materials provided with the distribution.
     28:  * * Neither the name of the Alpha Framework nor the names
     29:  *   of its contributors may be used to endorse or promote
     30:  *   products derived from this software without specific
     31:  *   prior written permission.
     32:  *
     33:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
     34:  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
     35:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     36:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     37:  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
     38:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     39:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     40:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     41:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     42:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     43:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     44:  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     45:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     46:  * </pre>
     47:  *
     48:  */
     49: class AlphaCacheProviderMemcache implements AlphaCacheProviderInterface {
     50:     /**
     51:      * Trace logger
     52:      *
     53:      * @var Logger
     54:      * @since 1.1
     55:      */
     56:     private static $logger = null;
     57:
     58:     /**
     59:      * Constructor
     60:      *
     61:      * @since 1.1
     62:      */
     63:     public function __construct() {
     64:         self::$logger = new Logger('AlphaCacheProviderMemcache');
     65:     }
     66:
     67:     /**
     68:      * (non-PHPdoc)
     69:      * @see alpha/util/cache/AlphaCacheProviderInterface::get()
     70:      * @since 1.1
     71:      */
     72:     public function get($key) {
     73:         self::$logger->debug('>>get(key=['.$key.'])');
     74:
     75:         global $config;
     76:
     77:         try {
     78:             $memcache = new Memcache();
     79:             $memcache->connect($config->get('cache.memcached.host'), 11211);
     80:
     81:             $value = $memcache->get($key);
     82:
     83:             self::$logger->debug('<<get: ['.print_r($value, true).'])');
     84:             return $value;
     85:         }catch(Exception $e) {
     86:             self::$logger->error('Error while attempting to load a business object from Memcached instance: ['.$e->getMessage().']');
     87:             self::$logger->debug('<<get: [false])');
     88:             return false;
     89:         }
     90:     }
     91:
     92:     /**
     93:      * (non-PHPdoc)
     94:      * @see alpha/util/cache/AlphaCacheProviderInterface::set()
     95:      * @since 1.1
     96:      */
     97:     public function set($key, $value, $expiry=0) {
     98:         global $config;
     99:
    100:         try {
    101:             $memcache = new Memcache();
    102:             $memcache->connect($config->get('cache.memcached.host'), 11211);
    103:
    104:             if($expiry > 0)
    105:                 $memcache->set($key, $value, MEMCACHE_COMPRESSED, $expiry);
    106:             else
    107:                 $memcache->set($key, $value, MEMCACHE_COMPRESSED);
    108:
    109:         }catch(Exception $e) {
    110:             self::$logger->error('Error while attempting to store a value to Memcached instance: ['.$e->getMessage().']');
    111:         }
    112:     }
    113:
    114:     /**
    115:      * (non-PHPdoc)
    116:      * @see alpha/util/cache/AlphaCacheProviderInterface::delete()
    117:      * @since 1.1
    118:      */
    119:     public function delete($key) {
    120:         global $config;
    121:
    122:         try {
    123:             $memcache = new Memcache();
    124:             $memcache->connect($config->get('cache.memcached.host'), 11211);
    125:             $memcache->delete($key);
    126:         }catch(Exception $e) {
    127:             self::$logger->error('Error while attempting to remove a value from Memcached instance: ['.$e->getMessage().']');
    128:         }
    129:     }
    130: }