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[经验分享] Codeigniter的Redis使用

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发表于 2017-12-20 17:25:22 | 显示全部楼层 |阅读模式
<?php  /**
  * CodeIgniter
  *
  * An open source application development framework for PHP
  *

  * This content is>  *
  * Copyright (c) 2014 - 2016, British Columbia Institute of Technology
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  *
  * @package CodeIgniter
  * @author  EllisLab Dev Team
  * @copyright   Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
  * @copyright   Copyright (c) 2014 - 2016, British Columbia Institute of Technology (http://bcit.ca/)
  * @license http://opensource.org/licenses/MIT  MIT License
  * @link    https://codeigniter.com
  * @since   Version 3.0.0
  * @filesource
  */
  defined('BASEPATH') OR exit('No direct script access allowed');
  /**

  * CodeIgniter Redis Caching>  *
  * @package    CodeIgniter
  * @subpackage Libraries
  * @category   Core
  * @author     Anton Lindqvist <anton@qvister.se>
  * @link
  */
  class CI_Cache_redis extends CI_Driver{
  /**
  * Default config
  *
  * @static
  * @var array
  */
  protected static $_default_config = array(
  'host' => '10.19.108.196',
  'password' => 'datu@com',
  'port' => 6379,
  'timeout' => 0
  );
  /**
  * Redis connection
  *
  * @var Redis
  */
  protected $_redis;
  // ------------------------------------------------------------------------
  /**

  *>  *
  * Setup Redis
  *
  * Loads Redis config file if present. Will halt execution
  * if a Redis connection can't be established.
  *
  * @return  void
  * @see     Redis::connect()
  */
  public function __construct(){
  if ( ! $this->is_supported()){
  log_message('error', 'Cache: Failed to create Redis object; extension not loaded?');
  return;
  }
  $CI =& get_instance();
  // 读取配置文件
  $config_all         = get_config();
  $config['host']     = $config_all['redis_host'];
  $config['port']     = $config_all['redis_port'];
  // $config['password'] = $config_all['redis_pwd'];
  $config['timeout']  = 0;
  $this->_redis = new Redis();
  try{
  if ( ! $this->_redis->connect($config['host'], ($config['host'][0] === '/' ? 0 : $config['port']), $config['timeout'])){
  log_message('error', 'Cache: Redis connection failed. Check your configuration.');
  }
  if (isset($config['password']) && ! $this->_redis->auth($config['password'])){
  log_message('error', 'Cache: Redis authentication failed.');
  }
  }
  catch (RedisException $e){
  log_message('error', 'Cache: Redis connection refused ('.$e->getMessage().')');
  }
  }
  // ------------------------------------------------------------------------
  /**
  * Get cache
  *

  * @param   string  $key    Cache>  * @return  mixed
  */
  public function get($key){
  $data = $this->_redis->hMGet($key, array('__ci_type', '__ci_value'));
  if (!$data['__ci_type']) $data['__ci_type'] = 'integer';
  if ( ! isset($data['__ci_type'], $data['__ci_value']) OR $data['__ci_value'] === FALSE){
  return FALSE;
  }
  switch ($data['__ci_type']){
  case 'array':
  case 'object':
  return unserialize($data['__ci_value']);
  case 'boolean':
  case 'integer':
  case 'double': // Yes, 'double' is returned and NOT 'float'
  case 'string':
  case 'NULL':
  return settype($data['__ci_value'], $data['__ci_type'])
  ? $data['__ci_value']
  : FALSE;
  case 'resource':
  default:
  return FALSE;
  }
  }
  // ------------------------------------------------------------------------
  /**
  * Save cache
  *

  * @param   string  $id Cache>  * @param   mixed   $data   Data to save
  * @param   int $ttl    Time to live in seconds
  * @param   bool    $raw    Whether to store the raw value (unused)
  * @return  bool    TRUE on success, FALSE on failure
  */
  public function save($id, $data, $ttl = 60, $raw = FALSE){
  switch ($data_type = gettype($data)){
  case 'array':
  case 'object':
  $data = serialize($data);
  break;
  case 'boolean':
  case 'integer':
  case 'double': // Yes, 'double' is returned and NOT 'float'
  case 'string':
  case 'NULL':
  break;
  case 'resource':
  default:
  return FALSE;
  }
  if ( ! $this->_redis->hMSet($id, array('__ci_type' => $data_type, '__ci_value' => $data))){
  return FALSE;
  }elseif ($ttl){
  $this->_redis->expireAt($id, time() + $ttl);
  }
  return TRUE;
  }
  // ------------------------------------------------------------------------
  /**
  * Delete from cache
  *
  * @param   string  $key    Cache key
  * @return  bool
  */
  public function delete($key){
  return ($this->_redis->delete($key) === 1);
  }
  // ------------------------------------------------------------------------
  /**
  * Increment a raw value
  *

  * @param   string  $id Cache>  * @param   int $offset Step/value to add
  * @return  mixed   New value on success or FALSE on failure
  */
  public function increment($id, $offset = 1){
  return $this->_redis->hIncrBy($id, '__ci_value', $offset);
  }
  // ------------------------------------------------------------------------
  /**
  * Decrement a raw value
  *

  * @param   string  $id Cache>  * @param   int $offset Step/value to reduce by
  * @return  mixed   New value on success or FALSE on failure
  */
  public function decrement($id, $offset = 1){
  return $this->_redis->hIncrBy($id, '__ci_value', -$offset);
  }
  // ------------------------------------------------------------------------
  /**
  * Clean cache
  *
  * @return  bool
  * @see     Redis::flushDB()
  */
  public function clean(){
  return $this->_redis->flushDB();
  }
  // ------------------------------------------------------------------------
  /**
  * Get cache driver info
  *
  * @param   string  $type   Not supported in Redis.
  *              Only included in order to offer a
  *              consistent cache API.
  * @return  array
  * @see     Redis::info()
  */
  public function cache_info($type = NULL){
  return $this->_redis->info();
  }
  // ------------------------------------------------------------------------
  /**
  * Get cache metadata
  *
  * @param   string  $key    Cache key
  * @return  array
  */
  public function get_metadata($key){
  $value = $this->get($key);
  if ($value !== FALSE){
  return array(
  'expire' => time() + $this->_redis->ttl($key),
  'data' => $value
  );
  }
  return FALSE;
  }
  // ------------------------------------------------------------------------
  /**
  * Check if Redis driver is supported
  *
  * @return  bool
  */
  public function is_supported(){
  return extension_loaded('redis');
  }
  // ------------------------------------------------------------------------
  /**
  * return redis
  *
  * @return  redis
  */
  public function get_redis(){
  return $this->_redis;
  }
  // ------------------------------------------------------------------------
  /**

  *>  *
  * Closes the connection to Redis if present.
  *
  * @return  void
  */
  public function __destruct(){
  if ($this->_redis){
  $this->_redis->close();
  }
  }
  }

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所有资源均系网友上传或者通过网络收集,我们仅提供一个展示、介绍、观摩学习的平台,我们不对其承担任何法律责任,如涉及侵犯版权等问题,请您及时通知我们,我们将立即处理,联系人Email:kefu@iyunv.com,QQ:1061981298 本贴地址:https://www.yunweiku.com/thread-426139-1-1.html 上篇帖子: redis设置开机启动 下篇帖子: springboot集成redis
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