MemcacheProfilerStorage.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\HttpKernel\Profiler;

use Memcache;

/**
 * Memcache Profiler Storage
 *
 * @author Andrej Hudec <pulzarraider@gmail.com>
 */
class MemcacheProfilerStorage extends BaseMemcacheProfilerStorage {

  /**
   * @var Memcache
   */
  private $memcache;

  /**
   * Internal convenience method that returns the instance of the Memcache
   *
   * @return Memcache
   *
   * @throws \RuntimeException
   */
  protected function getMemcache() {
    if (null === $this->memcache) {
      if (!preg_match('#^memcache://(?(?=\\[.*\\])\\[(.*)\\]|(.*)):(.*)$#', $this->dsn, $matches)) {
        throw new \RuntimeException(sprintf('Please check your configuration. You are trying to use Memcache with an invalid dsn "%s". The expected format is "memcache://[host]:port".', $this->dsn));
      }
      $host = $matches[1] ?: $matches[2];
      $port = $matches[3];
      $memcache = new Memcache();
      $memcache
        ->addServer($host, $port);
      $this->memcache = $memcache;
    }
    return $this->memcache;
  }

  /**
   * Set instance of the Memcache
   *
   * @param Memcache $memcache
   */
  public function setMemcache($memcache) {
    $this->memcache = $memcache;
  }

  /**
   * {@inheritdoc}
   */
  protected function getValue($key) {
    return $this
      ->getMemcache()
      ->get($key);
  }

  /**
   * {@inheritdoc}
   */
  protected function setValue($key, $value, $expiration = 0) {
    return $this
      ->getMemcache()
      ->set($key, $value, false, time() + $expiration);
  }

  /**
   * {@inheritdoc}
   */
  protected function delete($key) {
    return $this
      ->getMemcache()
      ->delete($key);
  }

  /**
   * {@inheritdoc}
   */
  protected function appendValue($key, $value, $expiration = 0) {
    $memcache = $this
      ->getMemcache();
    if (method_exists($memcache, 'append')) {

      //Memcache v3.0
      if (!($result = $memcache
        ->append($key, $value, false, $expiration))) {
        return $memcache
          ->set($key, $value, false, $expiration);
      }
      return $result;
    }

    //simulate append in Memcache <3.0
    $content = $memcache
      ->get($key);
    return $memcache
      ->set($key, $content . $value, false, $expiration);
  }

}