<?php
/*
* 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
* OWNER 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\Common\Cache;
/**
* Array cache driver.
*
* @link www.doctrine-project.org
* @since 2.0
* @author Benjamin Eberlei <kontakt@beberlei.de>
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
* @author Jonathan Wage <jonwage@gmail.com>
* @author Roman Borschel <roman@code-factory.org>
* @author David Abdemoulaie <dave@hobodave.com>
*/
class ArrayCache extends CacheProvider
{
/**
* @var array[] $data each element being a tuple of [$data, $expiration], where the expiration is int|bool
*/
private $data = [];
/**
* @var int
*/
private $hitsCount = 0;
/**
* @var int
*/
private $missesCount = 0;
/**
* @var int
*/
private $upTime;
/**
* {@inheritdoc}
*/
public function __construct()
{
$this->upTime = time();
}
/**
* {@inheritdoc}
*/
protected function doFetch($id)
{
if (! $this->doContains($id)) {
$this->missesCount += 1;
return false;
}
$this->hitsCount += 1;
return $this->data[$id][0];
}
/**
* {@inheritdoc}
*/
protected function doContains($id)
{
if (! isset($this->data[$id])) {
return false;
}
$expiration = $this->data[$id][1];
if ($expiration && $expiration < time()) {
$this->doDelete($id);
return false;
}
return true;
}
/**
* {@inheritdoc}
*/
protected function doSave($id, $data, $lifeTime = 0)
{
$this->data[$id] = [$data, $lifeTime ? time() + $lifeTime : false];
return true;
}
/**
* {@inheritdoc}
*/
protected function doDelete($id)
{
unset($this->data[$id]);
return true;
}
/**
* {@inheritdoc}
*/
protected function doFlush()
{
$this->data = [];
return true;
}
/**
* {@inheritdoc}
*/
protected function doGetStats()
{
return [
Cache::STATS_HITS => $this->hitsCount,
Cache::STATS_MISSES => $this->missesCount,
Cache::STATS_UPTIME => $this->upTime,
Cache::STATS_MEMORY_USAGE => null,
Cache::STATS_MEMORY_AVAILABLE => null,
];
}
}