|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Blixit\EventSourcing\Stream; |
|
6
|
|
|
|
|
7
|
|
|
use Blixit\EventSourcing\Event\EventAccessor; |
|
8
|
|
|
use Blixit\EventSourcing\Event\EventInterface; |
|
9
|
|
|
use Countable; |
|
10
|
|
|
use SplQueue; |
|
11
|
|
|
use function call_user_func; |
|
12
|
|
|
|
|
13
|
|
|
class Stream implements Countable |
|
14
|
|
|
{ |
|
15
|
|
|
/** @var StreamName $streamName */ |
|
16
|
|
|
private $streamName; |
|
17
|
|
|
|
|
18
|
|
|
/** @var SplQueue $queue */ |
|
19
|
|
|
private $queue; |
|
20
|
|
|
|
|
21
|
|
|
/** @var int $lastEnqueuedSequenceNumber */ |
|
22
|
|
|
private $lastEnqueuedSequenceNumber; |
|
23
|
|
|
|
|
24
|
|
|
/** @var callable $beforeEnqueue */ |
|
25
|
|
|
private $beforeEnqueue; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* Event accessor doesnt require to create many instances if |
|
29
|
|
|
* many instances of stream are created. The same accessor will be used. |
|
30
|
|
|
* |
|
31
|
|
|
* @var EventAccessor $eventAccessor |
|
32
|
|
|
*/ |
|
33
|
|
|
private static $eventAccessor; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @param EventInterface[] $events |
|
37
|
|
|
*/ |
|
38
|
|
|
public function __construct( |
|
39
|
|
|
StreamName $streamName, |
|
40
|
|
|
?array $events = [], |
|
41
|
|
|
?callable $beforeEnqueue = null |
|
42
|
|
|
) { |
|
43
|
|
|
if (empty(self::$eventAccessor)) { |
|
44
|
|
|
// only one item of the event accessor should be instantiated |
|
45
|
|
|
self::$eventAccessor = EventAccessor::getInstance(); |
|
46
|
|
|
} |
|
47
|
|
|
|
|
48
|
|
|
if (empty($beforeEnqueue)) { |
|
49
|
|
|
$beforeEnqueue = static function (EventInterface $event) : void {}; // phpcs:ignore |
|
|
|
|
|
|
50
|
|
|
} |
|
51
|
|
|
|
|
52
|
|
|
$this->queue = new SplQueue(); |
|
53
|
|
|
$this->streamName = $streamName; |
|
54
|
|
|
$this->beforeEnqueue = $beforeEnqueue; |
|
55
|
|
|
|
|
56
|
|
|
foreach ($events as $event) { |
|
57
|
|
|
$this->enqueue($event); |
|
58
|
|
|
} |
|
59
|
|
|
} |
|
60
|
|
|
|
|
61
|
|
|
public function getStreamName() : ?StreamName |
|
62
|
|
|
{ |
|
63
|
|
|
return $this->streamName; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
public function setStreamName(StreamName $streamName) : void |
|
67
|
|
|
{ |
|
68
|
|
|
$this->streamName = $streamName; |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
public function dequeue() : EventInterface |
|
72
|
|
|
{ |
|
73
|
|
|
return $this->queue->dequeue(); |
|
74
|
|
|
} |
|
75
|
|
|
|
|
76
|
|
|
/** |
|
77
|
|
|
* @throws StreamNotOrderedFailure |
|
78
|
|
|
*/ |
|
79
|
|
|
public function enqueue(EventInterface $event) : void |
|
80
|
|
|
{ |
|
81
|
|
|
call_user_func($this->beforeEnqueue, $event); |
|
82
|
|
|
self::$eventAccessor->setStreamName($event, (string) $this->streamName); |
|
83
|
|
|
|
|
84
|
|
|
if (! isset($this->lastEnqueuedSequenceNumber)) { |
|
85
|
|
|
$this->lastEnqueuedSequenceNumber = $event->getSequence(); |
|
86
|
|
|
} |
|
87
|
|
|
|
|
88
|
|
|
// check sequence order integrity |
|
89
|
|
|
if ($event->getSequence() < $this->lastEnqueuedSequenceNumber) { |
|
90
|
|
|
throw new StreamNotOrderedFailure($this->streamName); |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
$this->queue->enqueue($event); |
|
94
|
|
|
} |
|
95
|
|
|
|
|
96
|
|
|
/** |
|
97
|
|
|
* Count elements of an object |
|
98
|
|
|
*/ |
|
99
|
|
|
public function count() : int |
|
100
|
|
|
{ |
|
101
|
|
|
return $this->queue->count(); |
|
102
|
|
|
} |
|
103
|
|
|
|
|
104
|
|
|
public function getIterator() : SplQueue |
|
105
|
|
|
{ |
|
106
|
|
|
return $this->queue; |
|
107
|
|
|
} |
|
108
|
|
|
} |
|
109
|
|
|
|
blixit /
event-sourcing
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.