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 1811 2014-08-21 22:06:59Z 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 AlphaCacheProviderMemcache implements AlphaCacheProviderInterface {
50: /**
51: * Trace logger
52: *
53: * @var Logger
54: * @since 1.1
55: */
56: private static $logger = null;
57:
58: /**
59: * Connection to the cache server
60: *
61: * @var Memcache
62: * @since 1.2.4
63: */
64: private $connection;
65:
66: /**
67: * Constructor
68: *
69: * @since 1.1
70: */
71: public function __construct() {
72: self::$logger = new Logger('AlphaCacheProviderMemcache');
73:
74: global $config;
75:
76: try {
77: $this->connection = new Memcache();
78: $this->connection->connect($config->get('cache.memcached.host'), $config->get('cache.memcached.port'));
79: }catch(Exception $e) {
80: self::$logger->error('Error while attempting to load connect to Memcache cache: ['.$e->getMessage().']');
81: }
82: }
83:
84: /**
85: * (non-PHPdoc)
86: * @see alpha/util/cache/AlphaCacheProviderInterface::get()
87: * @since 1.1
88: */
89: public function get($key) {
90: self::$logger->debug('>>get(key=['.$key.'])');
91:
92: try {
93:
94: $value = $this->connection->get($key);
95:
96: self::$logger->debug('<<get: ['.print_r($value, true).'])');
97: return $value;
98: }catch(Exception $e) {
99: self::$logger->error('Error while attempting to load a business object from Memcache instance: ['.$e->getMessage().']');
100: self::$logger->debug('<<get: [false])');
101: return false;
102: }
103: }
104:
105: /**
106: * (non-PHPdoc)
107: * @see alpha/util/cache/AlphaCacheProviderInterface::set()
108: * @since 1.1
109: */
110: public function set($key, $value, $expiry=0) {
111:
112: try {
113: if($expiry > 0)
114: $this->connection->set($key, $value, MEMCACHE_COMPRESSED, $expiry);
115: else
116: $this->connection->set($key, $value, MEMCACHE_COMPRESSED);
117:
118: }catch(Exception $e) {
119: self::$logger->error('Error while attempting to store a value to Memcached instance: ['.$e->getMessage().']');
120: }
121: }
122:
123: /**
124: * (non-PHPdoc)
125: * @see alpha/util/cache/AlphaCacheProviderInterface::delete()
126: * @since 1.1
127: */
128: public function delete($key) {
129:
130: try {
131: $this->connection->delete($key);
132: }catch(Exception $e) {
133: self::$logger->error('Error while attempting to remove a value from Memcached instance: ['.$e->getMessage().']');
134: }
135: }
136: }
137:
138: ?>