|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* This file is part of the Ariadne Component Library. |
|
5
|
|
|
* |
|
6
|
|
|
* (c) Muze <[email protected]> |
|
7
|
|
|
* |
|
8
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
9
|
|
|
* file that was distributed with this source code. |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
namespace arc\cache; |
|
13
|
|
|
|
|
14
|
|
|
/** |
|
15
|
|
|
* Class Proxy |
|
16
|
|
|
* @package arc\cache |
|
17
|
|
|
*/ |
|
18
|
|
|
final class Proxy |
|
19
|
|
|
{ |
|
20
|
1 |
|
use \arc\traits\Proxy { |
|
21
|
|
|
\arc\traits\Proxy::__construct as private ProxyConstruct; |
|
22
|
|
|
} |
|
23
|
|
|
|
|
24
|
|
|
private $cacheStore = null; |
|
25
|
|
|
private $cacheControl = null; |
|
26
|
|
|
private $targetObject = null; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* Creates a new Caching Proxy object. |
|
30
|
|
|
* @param object $targetObject The object to cache. |
|
31
|
|
|
* @param object $cacheStore The cache store to use, e.g. \arc\cache\FileStore |
|
32
|
|
|
* @param mixed $cacheControl Either an int with the number of seconds to cache results, or a Closure that returns an int. |
|
33
|
|
|
* The Closure is called with a single array with the following entries: |
|
34
|
|
|
* - target The cached object a method was called on. |
|
35
|
|
|
* - method The method called |
|
36
|
|
|
* - arguments The arguments to the method |
|
37
|
|
|
* - output Any output generated by the method |
|
38
|
|
|
* - result The result of the method |
|
39
|
|
|
*/ |
|
40
|
4 |
|
public function __construct($targetObject, $cacheStore, $cacheControl = 7200) |
|
41
|
|
|
{ |
|
42
|
4 |
|
$this->ProxyConstruct( $targetObject ); |
|
43
|
4 |
|
$this->targetObject = $targetObject; |
|
44
|
4 |
|
$this->cacheStore = $cacheStore; |
|
45
|
4 |
|
$this->cacheControl = $cacheControl; |
|
46
|
4 |
|
} |
|
47
|
|
|
|
|
48
|
|
|
/** |
|
49
|
|
|
* Catches output and return values from a method call and returns them. |
|
50
|
|
|
* @param string $method |
|
51
|
|
|
* @param array $args |
|
52
|
|
|
* @return array with keys 'output' and 'result' |
|
53
|
|
|
*/ |
|
54
|
4 |
|
private function __callCatch($method, $args) |
|
55
|
|
|
{ |
|
56
|
|
|
// catch all output and return value, return it |
|
57
|
4 |
|
ob_start(); |
|
58
|
4 |
|
$result = call_user_func_array( array( $this->targetObject, $method ), $args ); |
|
59
|
4 |
|
$output = ob_get_contents(); |
|
60
|
4 |
|
ob_end_clean(); |
|
61
|
|
|
|
|
62
|
|
|
return array( |
|
63
|
4 |
|
'output' => $output, |
|
64
|
4 |
|
'result' => $result |
|
65
|
|
|
); |
|
66
|
|
|
} |
|
67
|
|
|
|
|
68
|
|
|
/** |
|
69
|
|
|
* Checks if a fresh cache image for this method and these arguments is available |
|
70
|
|
|
* and returns those. If not, it lets the call through and caches its output and results. |
|
71
|
|
|
* @param string $method |
|
72
|
|
|
* @param array $args |
|
73
|
|
|
* @param string $path |
|
74
|
|
|
* @return array |
|
75
|
|
|
*/ |
|
76
|
4 |
|
private function __callCached($method, $args, $path) |
|
77
|
|
|
{ |
|
78
|
|
|
// check the cache, if fresh, use the cached version |
|
79
|
4 |
|
$cacheData = $this->cacheStore->getIfFresh( $path ); |
|
80
|
4 |
|
if (!isset( $cacheData )) { |
|
81
|
4 |
|
if ($this->cacheStore->lock( $path )) { |
|
82
|
|
|
// try to get a lock to calculate the value |
|
83
|
4 |
|
$cacheData = $this->__callCatch( $method, $args ); |
|
84
|
4 |
|
if (is_callable( $this->cacheControl )) { |
|
85
|
2 |
|
$cacheTimeout = call_user_func( |
|
86
|
2 |
|
$this->cacheControl, |
|
87
|
|
|
array( |
|
88
|
2 |
|
'target' => $this->targetObject, |
|
89
|
2 |
|
'method' => $method, |
|
90
|
2 |
|
'arguments' => $args, |
|
91
|
2 |
|
'result' => $cacheData['result'], |
|
92
|
2 |
|
'output' => $cacheData['output'] |
|
93
|
|
|
) |
|
94
|
|
|
); |
|
95
|
|
|
} else { |
|
96
|
2 |
|
$cacheTimeout = $this->cacheControl; |
|
97
|
|
|
} |
|
98
|
4 |
|
$this->cacheStore->set( $path, $cacheData, $cacheTimeout ); |
|
99
|
|
|
} else if ($this->cacheStore->wait( $path )) { |
|
100
|
|
|
// couldn't get a lock, so there is another proces writing a cache, wait for that |
|
101
|
|
|
// stampede protection |
|
102
|
|
|
$cacheData = $this->cacheStore->get( $path ); |
|
103
|
|
|
} else { |
|
104
|
|
|
// wait failed, so just do the work without caching |
|
105
|
|
|
$cacheData = $this->__callCatch( $method, $args ); |
|
106
|
|
|
} |
|
107
|
|
|
} |
|
108
|
|
|
|
|
109
|
4 |
|
return $cacheData; |
|
110
|
|
|
} |
|
111
|
|
|
|
|
112
|
|
|
/** |
|
113
|
|
|
* Catches a call to the target object and caches it. If the result is an object, it creates a |
|
114
|
|
|
* cache proxy for that as well. |
|
115
|
|
|
* @param string $method |
|
116
|
|
|
* @param array $args |
|
117
|
|
|
* @return mixed |
|
118
|
|
|
*/ |
|
119
|
4 |
|
public function __call($method, $args) |
|
120
|
|
|
{ |
|
121
|
|
|
// create a usable but unique filename based on the arguments and method name |
|
122
|
4 |
|
$path = $method . '(' . sha1( serialize($args) ) . ')'; |
|
123
|
|
|
|
|
124
|
4 |
|
$cacheData = $this->__callCached( $method, $args, $path ); |
|
125
|
4 |
|
echo $cacheData['output']; |
|
126
|
4 |
|
$result = $cacheData['result']; |
|
127
|
4 |
|
if (is_object( $result )) { // for fluent interface we want to cache the returned object as well |
|
128
|
2 |
|
$result = new static( $result, $this->cacheStore->cd( $path ), $this->cacheControl ); |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
4 |
|
return $result; |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
|
/** |
|
135
|
|
|
* Catches any property access to the target object and caches it. If the property is an object |
|
136
|
|
|
* it creates a cache proxy for that as well. |
|
137
|
|
|
* @param string $name |
|
138
|
|
|
* @return mixed |
|
139
|
|
|
*/ |
|
140
|
|
|
public function __get($name) |
|
141
|
|
|
{ |
|
142
|
|
|
$result = $this->targetObject->{$name}; |
|
143
|
|
|
if (is_object( $result )) { |
|
144
|
|
|
$result = new static( $result, $this->cacheStore->cd( $name ), $this->cacheControl ); |
|
145
|
|
|
} |
|
146
|
|
|
|
|
147
|
|
|
return $result; |
|
148
|
|
|
} |
|
149
|
|
|
} |
|
150
|
|
|
|
Ariadne-CMS /
arc-cache
