CI框架中redis缓存相关操作文件示例代码

本文实例讲述了CI框架中redis缓存相关操作文件。分享给大家供大家参考，具体如下：

redis缓存类文件位置:

'cisystemlibrariesCachedriversCache_redis.php'

_redis->keys($key);
  }
  
  public function get($key)
  {
    return $this->_redis->get($key);
  }
  
  public function mget($keys)
  {
    return $this->_redis->mget($keys);
  }
  
  public function save($id, $data, $ttl = 60, $raw = FALSE)
  {
    return ($ttl)
      ? $this->_redis->setex($id, $ttl, $data)
      : $this->_redis->set($id, $data);
  }
  
  public function delete($key)
  {
    return ($this->_redis->delete($key) === 1);
  }
  
  public function hincrby($key, $field, $value = 1)
  {
    return $this->_redis->hIncrBy($key, $field, $value);
  }
  
  public function hincrbyfloat($key, $field, $value = 1)
  {
    return $this->_redis->hIncrByFloat($key, $field, $value);
  }
  
  public function lpush($key, $value)
  {
    return $this->_redis->lPush($key, $value);
  }
   
  public function rpush($key, $value)
  {
    return $this->_redis->rPush($key, $value);
  }
  
  public function rpop($key)
  {
    return $this->_redis->rPop($key);
  }
   
  public function brpop($key,$ontime=0)
  {
    return $this->_redis->brPop($key,$ontime);
  }
  
  public function llen($key)
  {
    return $this->_redis->lLen($key);
  }
  
  public function increment($id, $offset = 1)
  {
    return $this->_redis->exists($id)
      ? $this->_redis->incr($id, $offset)
      : FALSE;
  }
  
  public function incrby($key, $value = 1)
  {
    return $this->_redis->incrby($key, $value);
  }
  
  public function expire($key, $seconds)
  {
    return $this->_redis->expire($key, $seconds);
  }
  
  public function hset($alias,$key, $value)
  {
    return $this->_redis->hset($alias,$key, $value);
  }
  
  public function hget($alias,$key)
  {
    return $this->_redis->hget($alias,$key);
  }
  
  public function hkeys($alias)
  {
    return $this->_redis->hkeys($alias);
  }
  
  public function hgetall($alias)
  {
    return $this->_redis->hgetall($alias);
  }
  
  public function hmget($alias,$key)
  {
    return $this->_redis->hmget($alias,$key);
  }
  
  public function hdel($alias,$key)
  {
    return $this->_redis->hdel($alias,$key);
  }
  
  public function hvals($alias)
  {
    return $this->_redis->hvals($alias);
  }
  
  public function hmset($alias,$array)
  {
    return $this->_redis->hmset($alias,$array);
  }
  
  public function decrement($id, $offset = 1)
  {
    return $this->_redis->exists($id)
      ? $this->_redis->decr($id, $offset)
      : FALSE;
  }
  
  public function clean()
  {
    return $this->_redis->flushDB();
  }
  
  public function cache_info($type = NULL)
  {
    return $this->_redis->info();
  }
  
  public function get_metadata($key)
  {
    $value = $this->get($key);
    if ($value)
    {
      return array(
 'expire' => time() + $this->_redis->ttl($key),
 'data' => $value
      );
    }
    return FALSE;
  }
  
  public function is_supported()
  {
    if (extension_loaded('redis'))
    {
      return $this->_setup_redis();
    }
    else
    {
      log_message('debug', 'The Redis extension must be loaded to use Redis cache.');
      return FALSE;
    }
  }
  
  protected function _setup_redis()
  {
    $config = array();
    $CI =& get_instance();
    if ($CI->config->load('redis', TRUE, TRUE))
    {
      $config += $CI->config->item('redis');
    }
    $config = array_merge(self::$_default_config, $config);
    $config = !empty($config['redis'])?$config['redis']:$config;
    $this->_redis = new Redis();
    try
    {
      if ($config['socket_type'] === 'unix')
      {
 $success = $this->_redis->connect($config['socket']);
      }
      else // tcp socket
      {
 $success = $this->_redis->connect($config['host'], $config['port'], $config['timeout']);
      }
      if ( ! $success)
      {
 log_message('debug', 'Cache: Redis connection refused. Check the config.');
 return FALSE;
      }
    }
    catch (RedisException $e)
    {
      log_message('debug', 'Cache: Redis connection refused ('.$e->getMessage().')');
      return FALSE;
    }
    if (isset($config['password']))
    {
      $this->_redis->auth($config['password']);
    }
    return TRUE;
  }
  
  public function __destruct()
  {
    if ($this->_redis)
    {
      $this->_redis->close();
    }
  }
}

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