CI框架中redis缓存相关操作文件示例代码

时间:2022-09-10 10:41:03

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:

'ci\system\libraries\Cache\drivers\Cache_redis.php'

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.2.4 or newer
 *
 * NOTICE OF LICENSE
 *
 * Licensed under the Open Software License version 3.0
 *
 * This source file is subject to the Open Software License (OSL 3.0) that is
 * bundled with this package in the files license.txt / license.rst. It is
 * also available through the world wide web at this URL:
 * http://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to obtain it
 * through the world wide web, please send an email to
 * licensing@ellislab.com so we can send you a copy immediately.
 *
 * @package   CodeIgniter
 * @author   EllisLab Dev Team
 * @copyright  Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
 * @license   http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * @link    http://codeigniter.com
 * @since    Version 3.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');
/**
 * CodeIgniter Redis Caching Class
 *
 * @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(
    /*
    'socket_type' => 'tcp',
    'host' => '127.0.0.1',
    'password' => NULL,
    'port' => 6379,
    'timeout' => 0
    */
  );
  /**
   * Redis connection
   *
   * @var Redis
   */
  protected $_redis;
  /**
   * Get cache
   *
   * @param  string like *$key*
   * @return array(hash)
   */
  public function keys($key)
  {
    return $this->_redis->keys($key);
  }
  /**
   * Get cache
   *
   * @param  string Cache ID
   * @return mixed
   */
  public function get($key)
  {
    return $this->_redis->get($key);
  }
  /**
   * mGet cache
   *
   * @param  array  Cache ID Array
   * @return mixed
   */
  public function mget($keys)
  {
    return $this->_redis->mget($keys);
  }
  /**
   * Save cache
   *
   * @param  string $id Cache ID
   * @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, $raw = FALSE)
  {
    return ($ttl)
      ? $this->_redis->setex($id, $ttl, $data)
      : $this->_redis->set($id, $data);
  }
  /**
   * Delete from cache
   *
   * @param  string Cache key
   * @return bool
   */
  public function delete($key)
  {
    return ($this->_redis->delete($key) === 1);
  }
  /**
   * hIncrBy a raw value
   *
   * @param  string $id Cache ID
   * @param  string $field Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hincrby($key, $field, $value = 1)
  {
    return $this->_redis->hIncrBy($key, $field, $value);
  }
  /**
   * hIncrByFloat a raw value
   *
   * @param  string $id Cache ID
   * @param  string $field Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hincrbyfloat($key, $field, $value = 1)
  {
    return $this->_redis->hIncrByFloat($key, $field, $value);
  }
  /**
   * lpush a raw value
   *
   * @param  string $key  Cache ID
   * @param  string $value value
   * @return mixed  New value on success or FALSE on failure
   */
  public function lpush($key, $value)
  {
    return $this->_redis->lPush($key, $value);
  }
   /**
   * rpush a raw value
   *
   * @param  string $key  Cache ID
   * @param  string $value value
   * @return mixed  New value on success or FALSE on failure
   */
  public function rpush($key, $value)
  {
    return $this->_redis->rPush($key, $value);
  }
  /**
   * rpop a raw value
   *
   * @param  string $key  Cache ID
   * @param  string $value value
   * @return mixed  New value on success or FALSE on failure
   */
  public function rpop($key)
  {
    return $this->_redis->rPop($key);
  }
   /**
   * brpop a raw value
   *
   * @param  string $key  Cache ID
   * @param  string $ontime 阻塞等待时间
   * @return mixed  New value on success or FALSE on failure
   */
  public function brpop($key,$ontime=0)
  {
    return $this->_redis->brPop($key,$ontime);
  }
  /**
   * lLen a raw value
   *
   * @param  string $key  Cache ID
   * @return mixed  Value on success or FALSE on failure
   */
  public function llen($key)
  {
    return $this->_redis->lLen($key);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function increment($id, $offset = 1)
  {
    return $this->_redis->exists($id)
      ? $this->_redis->incr($id, $offset)
      : FALSE;
  }
  /**
   * incrby a raw value
   *
   * @param  string $key Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function incrby($key, $value = 1)
  {
    return $this->_redis->incrby($key, $value);
  }
  /**
   * set a value expire time
   *
   * @param  string $key Cache ID
   * @param  int $seconds expire seconds
   * @return mixed  New value on success or FALSE on failure
   */
  public function expire($key, $seconds)
  {
    return $this->_redis->expire($key, $seconds);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hset($alias,$key, $value)
  {
    return $this->_redis->hset($alias,$key, $value);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hget($alias,$key)
  {
    return $this->_redis->hget($alias,$key);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @return mixed  New value on success or FALSE on failure
   */
  public function hkeys($alias)
  {
    return $this->_redis->hkeys($alias);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hgetall($alias)
  {
    return $this->_redis->hgetall($alias);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hmget($alias,$key)
  {
    return $this->_redis->hmget($alias,$key);
  }
  /**
   * del a key value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hdel($alias,$key)
  {
    return $this->_redis->hdel($alias,$key);
  }
  /**
   * del a key value
   *
   * @param  string $id Cache ID
   * @return mixed  New value on success or FALSE on failure
   */
  public function hvals($alias)
  {
    return $this->_redis->hvals($alias);
  }
  /**
   * Increment a raw value
   *
   * @param  string $id Cache ID
   * @param  int $offset Step/value to add
   * @return mixed  New value on success or FALSE on failure
   */
  public function hmset($alias,$array)
  {
    return $this->_redis->hmset($alias,$array);
  }
  /**
   * Decrement a raw value
   *
   * @param  string $id Cache ID
   * @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 $this->_redis->exists($id)
      ? $this->_redis->decr($id, $offset)
      : FALSE;
  }
  /**
   * Clean cache
   *
   * @return bool
   * @see   Redis::flushDB()
   */
  public function clean()
  {
    return $this->_redis->flushDB();
  }
  /**
   * Get cache driver info
   *
   * @param  string Not supported in Redis.
   *     Only included in order to offer a
   *     consistent cache API.
   * @return array
   * @see   Redis::info()
   */
  public function cache_info($type = NULL)
  {
    return $this->_redis->info();
  }
  /**
   * Get cache metadata
   *
   * @param  string Cache key
   * @return array
   */
  public function get_metadata($key)
  {
    $value = $this->get($key);
    if ($value)
    {
      return array(
        'expire' => time() + $this->_redis->ttl($key),
        'data' => $value
      );
    }
    return FALSE;
  }
  /**
   * Check if Redis driver is supported
   *
   * @return bool
   */
  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;
    }
  }
  /**
   * Setup Redis config and connection
   *
   * Loads Redis config file if present. Will halt execution
   * if a Redis connection can't be established.
   *
   * @return bool
   * @see   Redis::connect()
   */
  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;
  }
  /**
   * Class destructor
   *
   * Closes the connection to Redis if present.
   *
   * @return void
   */
  public function __destruct()
  {
    if ($this->_redis)
    {
      $this->_redis->close();
    }
  }
}
/* End of file Cache_redis.php */
/* Location: ./system/libraries/Cache/drivers/Cache_redis.php */

希望本文所述对大家基于CodeIgniter框架的PHP程序设计有所帮助。