|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* @link https://github.com/Izumi-kun/yii2-longpoll |
|
4
|
|
|
* @copyright Copyright (c) 2017 Viktor Khokhryakov |
|
5
|
|
|
* @license http://opensource.org/licenses/BSD-3-Clause |
|
6
|
|
|
*/ |
|
7
|
|
|
|
|
8
|
|
|
namespace izumi\longpoll; |
|
9
|
|
|
|
|
10
|
|
|
use Yii; |
|
11
|
|
|
use yii\base\BaseObject; |
|
12
|
|
|
use yii\base\InvalidCallException; |
|
13
|
|
|
use yii\base\InvalidConfigException; |
|
14
|
|
|
use yii\base\InvalidParamException; |
|
15
|
|
|
use yii\helpers\FileHelper; |
|
16
|
|
|
use yii\helpers\StringHelper; |
|
17
|
|
|
|
|
18
|
|
|
/** |
|
19
|
|
|
* Event uses filesystem for monitoring and triggering events. |
|
20
|
|
|
* @property string $key The event key. |
|
21
|
|
|
* @property int $state The event state. |
|
22
|
|
|
* @author Viktor Khokhryakov <[email protected]> |
|
23
|
|
|
*/ |
|
24
|
|
|
class Event extends BaseObject implements EventInterface |
|
25
|
|
|
{ |
|
26
|
|
|
/** |
|
27
|
|
|
* @var string prefix of the parameter storing the state of event |
|
28
|
|
|
*/ |
|
29
|
|
|
protected $eventParamPrefix = 'event-'; |
|
30
|
|
|
/** |
|
31
|
|
|
* @var string the directory to store state files. You may use path alias here. |
|
32
|
|
|
*/ |
|
33
|
|
|
protected $statesPath = '@runtime/events'; |
|
34
|
|
|
/** |
|
35
|
|
|
* @var string event key |
|
36
|
|
|
*/ |
|
37
|
|
|
private $_key; |
|
38
|
|
|
/** |
|
39
|
|
|
* @var string normalized event key |
|
40
|
|
|
*/ |
|
41
|
|
|
private $_keyNormalized; |
|
42
|
|
|
/** |
|
43
|
|
|
* @var string the state file path |
|
44
|
|
|
*/ |
|
45
|
|
|
private $_filePath; |
|
46
|
|
|
/** |
|
47
|
|
|
* @var int current state |
|
48
|
|
|
*/ |
|
49
|
|
|
private $_state; |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* @inheritdoc |
|
53
|
|
|
*/ |
|
54
|
41 |
|
public function init() |
|
55
|
|
|
{ |
|
56
|
41 |
|
parent::init(); |
|
57
|
41 |
|
if ($this->_key === null) { |
|
58
|
1 |
|
throw new InvalidConfigException("The event key is required."); |
|
59
|
|
|
} |
|
60
|
40 |
|
if (ctype_alnum($this->_key) && StringHelper::byteLength($this->_key) <= 32) { |
|
61
|
33 |
|
$this->_keyNormalized = $this->_key; |
|
62
|
|
|
} else { |
|
63
|
10 |
|
$this->_keyNormalized = md5($this->_key); |
|
64
|
|
|
} |
|
65
|
40 |
|
$this->statesPath = Yii::getAlias($this->statesPath); |
|
66
|
40 |
|
if (!is_dir($this->statesPath)) { |
|
67
|
2 |
|
FileHelper::createDirectory($this->statesPath); |
|
68
|
|
|
} |
|
69
|
40 |
|
$this->_filePath = $this->statesPath . DIRECTORY_SEPARATOR . $this->_keyNormalized; |
|
70
|
40 |
|
} |
|
71
|
|
|
|
|
72
|
|
|
/** |
|
73
|
|
|
* @inheritdoc |
|
74
|
|
|
*/ |
|
75
|
45 |
|
public function setKey($key) |
|
76
|
|
|
{ |
|
77
|
45 |
|
if ($this->_key !== null) { |
|
78
|
1 |
|
throw new InvalidCallException("The key can't be changed."); |
|
79
|
|
|
} |
|
80
|
45 |
|
if (!is_string($key)) { |
|
81
|
5 |
|
throw new InvalidParamException("The event key must be a string."); |
|
82
|
|
|
} |
|
83
|
40 |
|
$this->_key = $key; |
|
84
|
40 |
|
} |
|
85
|
|
|
|
|
86
|
|
|
/** |
|
87
|
|
|
* @inheritdoc |
|
88
|
|
|
*/ |
|
89
|
27 |
|
public function getKey() |
|
90
|
|
|
{ |
|
91
|
27 |
|
return $this->_key; |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
|
|
/** |
|
95
|
|
|
* @inheritdoc |
|
96
|
|
|
*/ |
|
97
|
6 |
|
public function trigger() |
|
98
|
|
|
{ |
|
99
|
6 |
|
$filePath = $this->_filePath; |
|
100
|
6 |
|
$tries = 4; |
|
101
|
6 |
|
$lastError = null; |
|
102
|
6 |
|
$state = null; |
|
103
|
6 |
|
set_error_handler(function () use (&$lastError) { |
|
104
|
1 |
|
$lastError = func_get_arg(1); |
|
105
|
6 |
|
}); |
|
106
|
6 |
|
while ($tries > 0) { |
|
107
|
6 |
|
$tries--; |
|
108
|
|
|
|
|
109
|
6 |
|
$file = fopen($filePath, 'c+'); |
|
110
|
|
|
|
|
111
|
6 |
|
if ($file === false) { |
|
112
|
1 |
|
break; |
|
113
|
|
|
} |
|
114
|
|
|
|
|
115
|
5 |
|
if (!flock($file, LOCK_EX | LOCK_NB)) { |
|
116
|
1 |
|
fclose($file); |
|
117
|
1 |
|
usleep(250000); |
|
118
|
1 |
|
continue; |
|
119
|
|
|
} |
|
120
|
|
|
|
|
121
|
5 |
|
$state = (int) stream_get_contents($file) ?: 0; |
|
122
|
5 |
|
if ($state >= time() + 1000000) { |
|
123
|
1 |
|
$state = 0; |
|
124
|
|
|
} |
|
125
|
5 |
|
$state++; |
|
126
|
|
|
|
|
127
|
5 |
|
ftruncate($file, 0); |
|
128
|
5 |
|
rewind($file); |
|
129
|
5 |
|
fwrite($file, (string) $state); |
|
130
|
5 |
|
flock($file, LOCK_UN); |
|
131
|
5 |
|
fclose($file); |
|
132
|
|
|
|
|
133
|
5 |
|
if (touch($filePath, $state)) { |
|
134
|
5 |
|
$this->_state = $state; |
|
135
|
5 |
|
$lastError = null; |
|
136
|
5 |
|
break; |
|
137
|
|
|
} |
|
138
|
|
|
} |
|
139
|
6 |
|
restore_error_handler(); |
|
140
|
|
|
|
|
141
|
6 |
|
if ($lastError === null) { |
|
142
|
5 |
|
return $state; |
|
143
|
|
|
} |
|
144
|
|
|
|
|
145
|
1 |
|
Yii::warning("Unable to trigger event '{$this->_key}': {$lastError}", __METHOD__); |
|
146
|
|
|
|
|
147
|
1 |
|
return null; |
|
148
|
|
|
} |
|
149
|
|
|
|
|
150
|
|
|
/** |
|
151
|
|
|
* Trigger an event given the event key. |
|
152
|
|
|
* @param string $key event key |
|
153
|
|
|
* @return int|null new state or null on failure |
|
154
|
|
|
*/ |
|
155
|
3 |
|
public static function triggerByKey($key) |
|
156
|
|
|
{ |
|
157
|
3 |
|
return (new static(['key' => $key]))->trigger(); |
|
158
|
|
|
} |
|
159
|
|
|
|
|
160
|
|
|
/** |
|
161
|
|
|
* @inheritdoc |
|
162
|
|
|
*/ |
|
163
|
13 |
|
public function updateState() |
|
164
|
|
|
{ |
|
165
|
13 |
|
clearstatcache(true, $this->_filePath); |
|
166
|
|
|
|
|
167
|
13 |
|
$this->_state = @filemtime($this->_filePath) ?: 0; |
|
168
|
13 |
|
} |
|
169
|
|
|
|
|
170
|
|
|
/** |
|
171
|
|
|
* @inheritdoc |
|
172
|
|
|
*/ |
|
173
|
13 |
|
public function getState() |
|
174
|
|
|
{ |
|
175
|
13 |
|
if ($this->_state === null) { |
|
176
|
12 |
|
$this->updateState(); |
|
177
|
|
|
} |
|
178
|
|
|
|
|
179
|
13 |
|
return $this->_state; |
|
180
|
|
|
} |
|
181
|
|
|
|
|
182
|
|
|
/** |
|
183
|
|
|
* @inheritdoc |
|
184
|
|
|
*/ |
|
185
|
14 |
|
public function getParamName() |
|
186
|
|
|
{ |
|
187
|
14 |
|
return $this->eventParamPrefix . $this->_keyNormalized; |
|
188
|
|
|
} |
|
189
|
|
|
} |
|
190
|
|
|
|
Izumi-kun /
yii2-longpoll
