|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* GpsLab component. |
|
5
|
|
|
* |
|
6
|
|
|
* @author Peter Gribanov <[email protected]> |
|
7
|
|
|
* @copyright Copyright (c) 2011, Peter Gribanov |
|
8
|
|
|
* @license http://opensource.org/licenses/MIT |
|
9
|
|
|
*/ |
|
10
|
|
|
|
|
11
|
|
|
namespace GpsLab\Component\Command\Queue\PullPush; |
|
12
|
|
|
|
|
13
|
|
|
use GpsLab\Component\Command\Command; |
|
14
|
|
|
use Predis\Client; |
|
15
|
|
|
use Psr\Log\LoggerInterface; |
|
16
|
|
|
use Symfony\Component\Serializer\SerializerInterface; |
|
17
|
|
|
|
|
18
|
|
|
class PredisUniqueCommandQueue implements CommandQueue |
|
19
|
|
|
{ |
|
20
|
|
|
const FORMAT = PredisCommandQueue::FORMAT; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* @var Client |
|
24
|
|
|
*/ |
|
25
|
|
|
private $client; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* @var SerializerInterface |
|
29
|
|
|
*/ |
|
30
|
|
|
private $serializer; |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @var LoggerInterface |
|
34
|
|
|
*/ |
|
35
|
|
|
private $logger; |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* @var string |
|
39
|
|
|
*/ |
|
40
|
|
|
private $queue_name = ''; |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* @param Client $client |
|
44
|
|
|
* @param SerializerInterface $serializer |
|
45
|
|
|
* @param LoggerInterface $logger |
|
46
|
|
|
* @param string $queue_name |
|
47
|
|
|
*/ |
|
48
|
3 |
|
public function __construct(Client $client, SerializerInterface $serializer, LoggerInterface $logger, $queue_name) |
|
49
|
|
|
{ |
|
50
|
3 |
|
$this->client = $client; |
|
51
|
3 |
|
$this->serializer = $serializer; |
|
52
|
3 |
|
$this->logger = $logger; |
|
53
|
3 |
|
$this->queue_name = $queue_name; |
|
54
|
3 |
|
} |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* Push command to queue. |
|
58
|
|
|
* |
|
59
|
|
|
* @param Command $command |
|
60
|
|
|
* |
|
61
|
|
|
* @return bool |
|
62
|
|
|
*/ |
|
63
|
1 |
|
public function push(Command $command) |
|
64
|
|
|
{ |
|
65
|
1 |
|
$value = $this->serializer->serialize($command, self::FORMAT); |
|
66
|
|
|
|
|
67
|
|
|
// remove exists command and push it again |
|
68
|
1 |
|
$this->client->lrem($this->queue_name, 0, $value); |
|
69
|
|
|
|
|
70
|
1 |
|
return (bool) $this->client->rpush($this->queue_name, [$value]); |
|
71
|
|
|
} |
|
72
|
|
|
|
|
73
|
|
|
/** |
|
74
|
|
|
* Pop command from queue. Return NULL if queue is empty. |
|
75
|
|
|
* |
|
76
|
|
|
* @return Command|null |
|
77
|
|
|
*/ |
|
78
|
2 |
|
public function pull() |
|
79
|
|
|
{ |
|
80
|
2 |
|
$value = $this->client->lpop($this->queue_name); |
|
81
|
|
|
|
|
82
|
2 |
|
if (!$value) { |
|
83
|
1 |
|
return null; |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
try { |
|
87
|
2 |
|
return $this->serializer->deserialize($value, Command::class, self::FORMAT); |
|
88
|
1 |
|
} catch (\Exception $e) { |
|
89
|
|
|
// it's a critical error |
|
90
|
|
|
// it is necessary to react quickly to it |
|
91
|
1 |
|
$this->logger->critical('Failed denormalize a command in the Redis queue', [$value, $e->getMessage()]); |
|
92
|
|
|
|
|
93
|
|
|
// try denormalize in later |
|
94
|
1 |
|
$this->client->rpush($this->queue_name, [$value]); |
|
95
|
|
|
|
|
96
|
1 |
|
return null; |
|
97
|
|
|
} |
|
98
|
|
|
} |
|
99
|
|
|
} |
|
100
|
|
|
|
gpslab /
cqrs
