ZendDataCache.php

<?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;


/**
 * Zend Data Cache cache driver.
 *
 * @license http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link    www.doctrine-project.org
 * @since   2.0
 * @author  Ralph Schindler <ralph.schindler@zend.com>
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 */
class ZendDataCache extends CacheProvider {

  /**
   * {@inheritdoc}
   */
  protected function doFetch($id) {
    return zend_shm_cache_fetch($id);
  }

  /**
   * {@inheritdoc}
   */
  protected function doContains($id) {
    return false !== zend_shm_cache_fetch($id);
  }

  /**
   * {@inheritdoc}
   */
  protected function doSave($id, $data, $lifeTime = 0) {
    return zend_shm_cache_store($id, $data, $lifeTime);
  }

  /**
   * {@inheritdoc}
   */
  protected function doDelete($id) {
    return zend_shm_cache_delete($id);
  }

  /**
   * {@inheritdoc}
   */
  protected function doFlush() {
    $namespace = $this
      ->getNamespace();
    if (empty($namespace)) {
      return zend_shm_cache_clear();
    }
    return zend_shm_cache_clear($namespace);
  }

  /**
   * {@inheritdoc}
   */
  protected function doGetStats() {
    return null;
  }

}