      1: <?php
      2:
      3: /**
      4:  *
      5:  * An implementation of the AlphaCacheProviderInterface interface that uses APC/APCu as the
      6:  * target store.
      7:  *
      8:  * @package alpha::util::cache
      9:  * @since 1.2.4
     10:  * @author John Collins <dev@alphaframework.org>
     11:  * @version $Id: AlphaCacheProviderAPC.inc 1813 2014-08-25 22:22:31Z alphadevx $
     12:  * @license http://www.opensource.org/licenses/bsd-license.php The BSD License
     13:  * @copyright Copyright (c) 2014, 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 AlphaCacheProviderAPC implements AlphaCacheProviderInterface {
     50:     /**
     51:      * Trace logger
     52:      *
     53:      * @var Logger
     54:      * @since 1.2.4
     55:      */
     56:     private static $logger = null;
     57:
     58:
     59:     /**
     60:      * Constructor
     61:      *
     62:      * @since 1.2.4
     63:      */
     64:     public function __construct() {
     65:         self::$logger = new Logger('AlphaCacheProviderAPC');
     66:
     67:         global $config;
     68:
     69:     }
     70:
     71:     /**
     72:      * (non-PHPdoc)
     73:      * @see alpha/util/cache/AlphaCacheProviderInterface::get()
     74:      * @since 1.2.4
     75:      */
     76:     public function get($key) {
     77:         self::$logger->debug('>>get(key=['.$key.'])');
     78:
     79:         try {
     80:             $value = apc_fetch($key);
     81:
     82:             self::$logger->debug('<<get: ['.print_r($value, true).'])');
     83:
     84:             return $value;
     85:         }catch(Exception $e) {
     86:             self::$logger->error('Error while attempting to load a business object from APC cache: ['.$e->getMessage().']');
     87:             self::$logger->debug('<<get: [false])');
     88:             return false;
     89:         }
     90:     }
     91:
     92:     /**
     93:      * (non-PHPdoc)
     94:      * @see alpha/util/cache/AlphaCacheProviderInterface::set()
     95:      * @since 1.2.4
     96:      */
     97:     public function set($key, $value, $expiry=0) {
     98:
     99:         try {
    100:             if($expiry > 0)
    101:                 apc_store($key, $value, $expiry);
    102:             else
    103:                 apc_store($key, $value);
    104:
    105:           }catch(Exception $e) {
    106:               self::$logger->error('Error while attempting to store a value to APC cache: ['.$e->getMessage().']');
    107:           }
    108:     }
    109:
    110:     /**
    111:      * (non-PHPdoc)
    112:      * @see alpha/util/cache/AlphaCacheProviderInterface::delete()
    113:      * @since 1.2.4
    114:      */
    115:     public function delete($key) {
    116:
    117:         try {
    118:             apc_delete($key);
    119:         }catch(Exception $e) {
    120:             self::$logger->error('Error while attempting to remove a value from APC cache: ['.$e->getMessage().']');
    121:         }
    122:     }
    123: }
    124:
    125: ?>