1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
<?php
namespace Alpha\Util\Cache;
use Alpha\Util\Logging\Logger;
use Alpha\Util\Config\ConfigProvider;
use Redis;
/**
* An implementation of the CacheProviderInterface interface that uses Redis as the
* target store.
*
* @since 1.2.4
*
* @author John Collins <dev@alphaframework.org>
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @copyright Copyright (c) 2018, John Collins (founder of Alpha Framework).
* All rights reserved.
*
* <pre>
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the
* following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
* * Neither the name of the Alpha Framework nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* </pre>
*/
class CacheProviderRedis implements CacheProviderInterface
{
/**
* Trace logger.
*
* @var \Alpha\Util\Logging\Logger
*
* @since 1.2.4
*/
private static $logger = null;
/**
* Connection to the cache server.
*
* @var Redis
*
* @since 1.2.4
*/
private $connection;
/**
* Cache key prefix to use, based on the application title, to prevent key clashes between different apps
* using the same cache provider.
*
* @var string
*
* @since 3.0.0
*/
private $appPrefix;
/**
* Constructor.
*
* @since 1.2.4
*/
public function __construct()
{
self::$logger = new Logger('CacheProviderRedis');
$config = ConfigProvider::getInstance();
$this->appPrefix = preg_replace("/[^a-zA-Z0-9]+/", "", $config->get('app.title'));
try {
$this->connection = new Redis();
$this->connection->connect($config->get('cache.redis.host'), $config->get('cache.redis.port'));
$this->connection->setOption(Redis::OPT_SERIALIZER, Redis::SERIALIZER_PHP);
$this->connection->select($config->get('cache.redis.db'));
} catch (\Exception $e) {
self::$logger->error('Error while attempting to connect to Redis cache: ['.$e->getMessage().']');
}
}
/**
* {@inheritdoc}
*/
public function get($key)
{
self::$logger->debug('>>get(key=['.$key.'])');
try {
$value = $this->connection->get($this->appPrefix.'-'.$key);
self::$logger->debug('<<get: ['.print_r($value, true).'])');
return $value;
} catch (\Exception $e) {
self::$logger->error('Error while attempting to load a business object from Redis instance: ['.$e->getMessage().']');
self::$logger->debug('<<get: [false])');
return false;
}
}
/**
* {@inheritdoc}
*/
public function set($key, $value, $expiry = 0)
{
try {
if ($expiry > 0) {
$this->connection->setex($this->appPrefix.'-'.$key, $expiry, $value);
} else {
$this->connection->set($this->appPrefix.'-'.$key, $value);
}
} catch (\Exception $e) {
self::$logger->error('Error while attempting to store a value to Redis instance: ['.$e->getMessage().']');
}
}
/**
* {@inheritdoc}
*/
public function delete($key)
{
try {
$this->connection->delete($this->appPrefix.'-'.$key);
} catch (\Exception $e) {
self::$logger->error('Error while attempting to remove a value from Redis instance: ['.$e->getMessage().']');
}
}
}