| 1 |
<?php |
| 2 |
/* |
| 3 |
* Copyright 2010 Google Inc. |
| 4 |
* |
| 5 |
* Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 |
* you may not use this file except in compliance with the License. |
| 7 |
* You may obtain a copy of the License at |
| 8 |
* |
| 9 |
* http://www.apache.org/licenses/LICENSE-2.0 |
| 10 |
* |
| 11 |
* Unless required by applicable law or agreed to in writing, software |
| 12 |
* distributed under the License is distributed on an "AS IS" BASIS, |
| 13 |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 |
* See the License for the specific language governing permissions and |
| 15 |
* limitations under the License. |
| 16 |
*/ |
| 17 |
|
| 18 |
require_once "Google/Cache/Abstract.php"; |
| 19 |
require_once "Google/Cache/Exception.php"; |
| 20 |
|
| 21 |
/** |
| 22 |
* A persistent storage class based on the APC cache, which is not |
| 23 |
* really very persistent, as soon as you restart your web server |
| 24 |
* the storage will be wiped, however for debugging and/or speed |
| 25 |
* it can be useful, and cache is a lot cheaper then storage. |
| 26 |
* |
| 27 |
* @author Chris Chabot <chabotc@google.com> |
| 28 |
*/ |
| 29 |
class Google_Cache_Apc extends Google_Cache_Abstract |
| 30 |
{ |
| 31 |
public function __construct(Google_Client $client) |
| 32 |
{ |
| 33 |
if (! function_exists('apc_add') ) { |
| 34 |
throw new Google_Cache_Exception("Apc functions not available"); |
| 35 |
} |
| 36 |
} |
| 37 |
|
| 38 |
/** |
| 39 |
* @inheritDoc |
| 40 |
*/ |
| 41 |
public function get($key, $expiration = false) |
| 42 |
{ |
| 43 |
$ret = apc_fetch($key); |
| 44 |
if ($ret === false) { |
| 45 |
return false; |
| 46 |
} |
| 47 |
if (is_numeric($expiration) && (time() - $ret['time'] > $expiration)) { |
| 48 |
$this->delete($key); |
| 49 |
return false; |
| 50 |
} |
| 51 |
return $ret['data']; |
| 52 |
} |
| 53 |
|
| 54 |
/** |
| 55 |
* @inheritDoc |
| 56 |
*/ |
| 57 |
public function set($key, $value) |
| 58 |
{ |
| 59 |
$rc = apc_store($key, array('time' => time(), 'data' => $value)); |
| 60 |
if ($rc == false) { |
| 61 |
throw new Google_Cache_Exception("Couldn't store data"); |
| 62 |
} |
| 63 |
} |
| 64 |
|
| 65 |
/** |
| 66 |
* @inheritDoc |
| 67 |
* @param String $key |
| 68 |
*/ |
| 69 |
public function delete($key) |
| 70 |
{ |
| 71 |
apc_delete($key); |
| 72 |
} |
| 73 |
} |
| 74 |
|
