|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace DDDominio\EventSourcing\EventStore\Projection; |
|
4
|
|
|
|
|
5
|
|
|
use DDDominio\Common\EventInterface; |
|
6
|
|
|
use DDDominio\EventSourcing\Common\EventStreamInterface; |
|
7
|
|
|
use DDDominio\EventSourcing\EventStore\EventStoreInterface; |
|
8
|
|
|
|
|
9
|
|
|
class ProjectionBuilder |
|
10
|
|
|
{ |
|
11
|
|
|
/** |
|
12
|
|
|
* @var EventStoreInterface |
|
13
|
|
|
*/ |
|
14
|
|
|
private $eventStore; |
|
15
|
|
|
|
|
16
|
|
|
/** |
|
17
|
|
|
* @var callable |
|
18
|
|
|
*/ |
|
19
|
|
|
private $stateInitializer; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* @var string |
|
23
|
|
|
*/ |
|
24
|
|
|
private $from; |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @var bool |
|
28
|
|
|
*/ |
|
29
|
|
|
private $forEachStream; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* @var array |
|
33
|
|
|
*/ |
|
34
|
|
|
private $eventHandlers; |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* @var Projector |
|
38
|
|
|
*/ |
|
39
|
|
|
private $projector; |
|
40
|
|
|
|
|
41
|
|
|
/** |
|
42
|
|
|
* @param EventStoreInterface $eventStore |
|
43
|
|
|
*/ |
|
44
|
8 |
|
public function __construct(EventStoreInterface $eventStore) |
|
45
|
|
|
{ |
|
46
|
8 |
|
$this->eventStore = $eventStore; |
|
47
|
4 |
|
$this->stateInitializer = function() { |
|
48
|
4 |
|
return new \stdClass(); |
|
49
|
|
|
}; |
|
50
|
8 |
|
$this->forEachStream = false; |
|
51
|
8 |
|
$this->projector = new Projector(); |
|
52
|
8 |
|
} |
|
53
|
|
|
|
|
54
|
|
|
/** |
|
55
|
|
|
* @param callable $stateInitializer |
|
56
|
|
|
* @return $this |
|
57
|
|
|
*/ |
|
58
|
4 |
|
public function init(callable $stateInitializer) |
|
59
|
|
|
{ |
|
60
|
4 |
|
$this->stateInitializer = $stateInitializer; |
|
61
|
4 |
|
return $this; |
|
62
|
|
|
} |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* @param string $streamId |
|
66
|
|
|
* @return $this |
|
67
|
|
|
*/ |
|
68
|
8 |
|
public function from($streamId) |
|
69
|
|
|
{ |
|
70
|
8 |
|
$this->from = $streamId; |
|
71
|
8 |
|
return $this; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
/** |
|
75
|
|
|
* @return $this |
|
76
|
|
|
*/ |
|
77
|
2 |
|
public function fromAll() |
|
78
|
|
|
{ |
|
79
|
2 |
|
$this->from(''); |
|
80
|
2 |
|
return $this; |
|
81
|
|
|
} |
|
82
|
|
|
|
|
83
|
|
|
/** |
|
84
|
|
|
* @return $this |
|
85
|
|
|
*/ |
|
86
|
2 |
|
public function forEachStream() |
|
87
|
|
|
{ |
|
88
|
2 |
|
$this->forEachStream = true; |
|
89
|
2 |
|
return $this; |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
/** |
|
93
|
|
|
* @param string $eventClass |
|
94
|
|
|
* @param callable $eventHandler |
|
95
|
|
|
* @return $this |
|
96
|
|
|
*/ |
|
97
|
6 |
|
public function when($eventClass, callable $eventHandler) |
|
98
|
|
|
{ |
|
99
|
6 |
|
$this->eventHandlers[$eventClass] = $eventHandler; |
|
100
|
6 |
|
return $this; |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
/** |
|
104
|
|
|
* @return \stdClass |
|
105
|
|
|
*/ |
|
106
|
8 |
|
public function execute() |
|
107
|
|
|
{ |
|
108
|
8 |
|
$state = $this->initState(); |
|
109
|
8 |
|
if ($this->forEachStream) { |
|
110
|
2 |
|
$streams = $this->eventStore->readAllStreams(); |
|
111
|
2 |
|
foreach ($streams as $stream) { |
|
112
|
2 |
|
$state = $this->runStreamProjection($stream); |
|
113
|
|
|
} |
|
114
|
|
|
} else { |
|
115
|
6 |
|
$stream = $this->executeStreamEventsQuery(); |
|
116
|
6 |
|
$state = $this->runStreamProjection($stream); |
|
117
|
|
|
} |
|
118
|
8 |
|
foreach ($this->projector->emittedEventsByStream() as $streamId => $events) { |
|
119
|
3 |
|
$this->eventStore->appendToStream($streamId, $events); |
|
120
|
|
|
} |
|
121
|
8 |
|
return $state; |
|
122
|
|
|
} |
|
123
|
|
|
|
|
124
|
|
|
/** |
|
125
|
|
|
* @return \DDDominio\EventSourcing\Common\EventStreamInterface |
|
126
|
|
|
*/ |
|
127
|
6 |
|
private function executeStreamEventsQuery() |
|
128
|
|
|
{ |
|
129
|
6 |
|
return empty($this->from) ? |
|
130
|
1 |
|
$stream = $this->eventStore->readAllEvents() : |
|
131
|
6 |
|
$stream = $this->eventStore->readFullStream($this->from); |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
|
/** |
|
135
|
|
|
* @param EventStreamInterface $stream |
|
136
|
|
|
* @return \stdClass |
|
137
|
|
|
*/ |
|
138
|
7 |
|
private function runStreamProjection($stream) |
|
139
|
|
|
{ |
|
140
|
7 |
|
$state = $this->initState(); |
|
141
|
7 |
|
foreach ($stream as $event) { |
|
142
|
|
|
/** @var EventInterface $event */ |
|
143
|
5 |
|
if (isset($this->eventHandlers[get_class($event->data())])) { |
|
144
|
5 |
|
$this->eventHandlers[get_class($event->data())]($event->data(), $state, $this->projector); |
|
145
|
|
|
} |
|
146
|
|
|
} |
|
147
|
7 |
|
return $state; |
|
148
|
|
|
} |
|
149
|
|
|
|
|
150
|
|
|
/** |
|
151
|
|
|
* @return \stdClass |
|
152
|
|
|
*/ |
|
153
|
8 |
|
private function initState() |
|
154
|
|
|
{ |
|
155
|
8 |
|
$stateInitializer = $this->stateInitializer; |
|
156
|
8 |
|
return $stateInitializer(new \stdClass()); |
|
157
|
|
|
} |
|
158
|
|
|
} |
|
159
|
|
|
|
DDDominio /
event-sourcing
