156 lines
3.1 KiB
PHP
156 lines
3.1 KiB
PHP
<?php
|
|
/**
|
|
* @author Joas Schilling <nickvergessen@owncloud.com>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
*
|
|
* @copyright Copyright (c) 2015, ownCloud, Inc.
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
namespace OC\Memcache;
|
|
|
|
use OCP\IMemcache;
|
|
|
|
class ArrayCache extends Cache implements IMemcache {
|
|
/** @var array Array with the cached data */
|
|
protected $cachedData = array();
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public function get($key) {
|
|
if ($this->hasKey($key)) {
|
|
return $this->cachedData[$key];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public function set($key, $value, $ttl = 0) {
|
|
$this->cachedData[$key] = $value;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public function hasKey($key) {
|
|
return isset($this->cachedData[$key]);
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public function remove($key) {
|
|
unset($this->cachedData[$key]);
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
public function clear($prefix = '') {
|
|
if ($prefix === '') {
|
|
$this->cachedData = [];
|
|
return true;
|
|
}
|
|
|
|
foreach ($this->cachedData as $key => $value) {
|
|
if (strpos($key, $prefix) === 0) {
|
|
$this->remove($key);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Set a value in the cache if it's not already stored
|
|
*
|
|
* @param string $key
|
|
* @param mixed $value
|
|
* @param int $ttl Time To Live in seconds. Defaults to 60*60*24
|
|
* @return bool
|
|
*/
|
|
public function add($key, $value, $ttl = 0) {
|
|
// since this cache is not shared race conditions aren't an issue
|
|
if ($this->hasKey($key)) {
|
|
return false;
|
|
} else {
|
|
return $this->set($key, $value, $ttl);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Increase a stored number
|
|
*
|
|
* @param string $key
|
|
* @param int $step
|
|
* @return int | bool
|
|
*/
|
|
public function inc($key, $step = 1) {
|
|
$oldValue = $this->get($key);
|
|
if (is_int($oldValue)) {
|
|
$this->set($key, $oldValue + $step);
|
|
return $oldValue + $step;
|
|
} else {
|
|
$success = $this->add($key, $step);
|
|
return ($success) ? $step : false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Decrease a stored number
|
|
*
|
|
* @param string $key
|
|
* @param int $step
|
|
* @return int | bool
|
|
*/
|
|
public function dec($key, $step = 1) {
|
|
$oldValue = $this->get($key);
|
|
if (is_int($oldValue)) {
|
|
$this->set($key, $oldValue - $step);
|
|
return $oldValue - $step;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Compare and set
|
|
*
|
|
* @param string $key
|
|
* @param mixed $old
|
|
* @param mixed $new
|
|
* @return bool
|
|
*/
|
|
public function cas($key, $old, $new) {
|
|
if ($this->get($key) === $old) {
|
|
return $this->set($key, $new);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* {@inheritDoc}
|
|
*/
|
|
static public function isAvailable() {
|
|
return true;
|
|
}
|
|
}
|