| 1441 |
ariadna |
1 |
<?php
|
|
|
2 |
// This file is part of Moodle - http://moodle.org/
|
|
|
3 |
//
|
|
|
4 |
// Moodle is free software: you can redistribute it and/or modify
|
|
|
5 |
// it under the terms of the GNU General Public License as published by
|
|
|
6 |
// the Free Software Foundation, either version 3 of the License, or
|
|
|
7 |
// (at your option) any later version.
|
|
|
8 |
//
|
|
|
9 |
// Moodle is distributed in the hope that it will be useful,
|
|
|
10 |
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
11 |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
12 |
// GNU General Public License for more details.
|
|
|
13 |
//
|
|
|
14 |
// You should have received a copy of the GNU General Public License
|
|
|
15 |
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
|
|
|
16 |
|
|
|
17 |
namespace core_cache;
|
|
|
18 |
|
|
|
19 |
/**
|
|
|
20 |
* Cacheable object.
|
|
|
21 |
*
|
|
|
22 |
* This interface can be implemented by any class that is going to be passed into a cache and allows it to take control of the
|
|
|
23 |
* structure and the information about to be cached, as well as how to deal with it when it is retrieved from a cache.
|
|
|
24 |
* Think of it like serialisation and the __sleep and __wakeup methods.
|
|
|
25 |
* This is used because cache stores are responsible for how they interact with data and what they do when storing it. This
|
|
|
26 |
* interface ensures there is always a guaranteed action.
|
|
|
27 |
*
|
|
|
28 |
* @package core_cache
|
|
|
29 |
* @copyright Sam Hemelryk
|
|
|
30 |
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
|
|
|
31 |
*/
|
|
|
32 |
interface cacheable_object_interface {
|
|
|
33 |
/**
|
|
|
34 |
* Prepares the object for caching. Works like the __sleep method.
|
|
|
35 |
*
|
|
|
36 |
* @return mixed The data to cache, can be anything except a class that implements the cacheable_object... that would
|
|
|
37 |
* be dumb.
|
|
|
38 |
*/
|
|
|
39 |
public function prepare_to_cache();
|
|
|
40 |
|
|
|
41 |
/**
|
|
|
42 |
* Takes the data provided by prepare_to_cache and reinitialises an instance of the associated from it.
|
|
|
43 |
*
|
|
|
44 |
* @param mixed $data
|
|
|
45 |
* @return object The instance for the given data.
|
|
|
46 |
*/
|
|
|
47 |
public static function wake_from_cache($data);
|
|
|
48 |
}
|
|
|
49 |
|
|
|
50 |
// Alias this class to the old name.
|
|
|
51 |
// This file will be autoloaded by the legacyclasses autoload system.
|
|
|
52 |
// In future all uses of this class will be corrected and the legacy references will be removed.
|
|
|
53 |
class_alias(cacheable_object_interface::class, \cacheable_object::class);
|