135 lines
4.5 KiB
PHP
135 lines
4.5 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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/**
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* Doctrine_Cache_Sqlite
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*
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* @package Doctrine
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* @subpackage Doctrine_Cache
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @category Object Relational Mapping
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* @link www.phpdoctrine.com
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* @since 1.0
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* @version $Revision$
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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*/
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class Doctrine_Cache_Db extends Doctrine_Cache_Driver implements Countable
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{
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/**
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* constructor
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*
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* @param array $_options an array of options
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*/
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public function __construct($options)
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{
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if ( ! isset($options['connection']) ||
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! ($options['connection'] instanceof Doctrine_Connection)) {
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throw new Doctrine_Cache_Exception('Connection option not set.');
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}
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$this->_options = $options;
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}
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/**
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* getConnection
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* returns the connection object associated with this cache driver
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*
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* @return Doctrine_Connection connection object
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*/
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public function getConnection()
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{
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return $this->_options['connection'];
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}
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/**
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* Test if a cache is available for the given id and (if yes) return it (false else)
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*
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* Note : return value is always "string" (unserialization is done by the core not by the backend)
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*
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* @param string $id cache id
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* @param boolean $testCacheValidity if set to false, the cache validity won't be tested
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* @return string cached datas (or false)
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*/
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public function fetch($id, $testCacheValidity = true)
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{
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$sql = 'SELECT data, expires FROM cache WHERE id = ?';
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if ($testCacheValidity) {
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$sql .= ' AND (expire=0 OR expire > ' . time() . ')';
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}
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$result = $this->getConnection()->fetchAssoc($sql, array($id));
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return unserialize($result['data']);
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}
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/**
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* Test if a cache is available or not (for the given id)
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*
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* @param string $id cache id
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* @return mixed false (a cache is not available) or "last modified" timestamp (int) of the available cache record
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*/
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public function contains($id)
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{
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$sql = 'SELECT expires FROM cache WHERE id = ? AND (expire=0 OR expire > ' . time() . ')';
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return $this->getConnection()->fetchOne($sql, array($id));
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}
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/**
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* Save some string datas into a cache record
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*
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* Note : $data is always saved as a string
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*
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* @param string $data data to cache
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* @param string $id cache id
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* @param int $lifeTime if != false, set a specific lifetime for this cache record (null => infinite lifeTime)
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* @return boolean true if no problem
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*/
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public function save($data, $id, $lifeTime = false)
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{
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$sql = 'INSERT INTO cache (id, data, expires) VALUES (?, ?, ?)';
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$params = array($id, serialize($data), (time() + $lifeTime));
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return (bool) $this->getConnection()->exec($sql, $params);
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}
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/**
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* Remove a cache record
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*
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* @param string $id cache id
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* @return boolean true if no problem
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*/
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public function delete($id)
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{
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$sql = 'DELETE FROM cache WHERE id = ?';
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return (bool) $this->getConnection()->exec($sql, array($id));
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}
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/**
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* count
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* returns the number of cached elements
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*
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* @return integer
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*/
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public function count()
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{
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return (int) $this->getConnection()->fetchOne('SELECT COUNT(*) FROM cache');
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}
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}
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