Viewing file:  CacheStorageMemcache.php (2.55 KB) -rwxr-xr-x
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<?php
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
class CacheStorageMemcache extends CacheStorage {
/**
* @var Memcache
*/
private static $memcache = null;
private $prefix = null;
public function __construct($name) {
$this->prefix = $name;
if (!self::$memcache) {
self::$memcache = new Memcache();
$host = Config::get('cache_host');
$port = Config::get('cache_port');
if (Config::get('cache_memcache_pconnect')) {
if (!@self::$memcache->pconnect($host, $port)) {
throw new CacheException("Couldn't connect to memcache server");
}
} else {
if (!@self::$memcache->connect($host, $port)) {
throw new CacheException("Couldn't connect to memcache server");
}
}
}
}
public function isLocked($key) {
if ((@self::$memcache->get($this->storageKey($key) . '.lock')) === false) {
return false;
}
return true;
}
public function lock($key) {
// the interesting thing is that this could fail if the lock was created in the meantime..
// but we'll ignore that out of convenience
@self::$memcache->add($this->storageKey($key) . '.lock', '', 0, 2);
}
public function unlock($key) {
// suppress all warnings, if some other process removed it that's ok too
@self::$memcache->delete($this->storageKey($key) . '.lock');
}
public function store($key, $value) {
return self::$memcache->set($this->storageKey($key), $value, false, 0);
}
public function fetch($key) {
return self::$memcache->get($this->storageKey($key));
}
public function delete($key) {
if (!@self::$memcache->delete($this->storageKey($key))) {
throw new CacheException("Cache memcache could not be deleted");
}
}
private function storageKey($key) {
return $this->prefix . '_' . $key;
}
}
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