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: }