|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* event-sourcing (https://github.com/phpgears/event-sourcing). |
|
5
|
|
|
* Event Sourcing base. |
|
6
|
|
|
* |
|
7
|
|
|
* @license MIT |
|
8
|
|
|
* @link https://github.com/phpgears/event-sourcing |
|
9
|
|
|
* @author Julián Gutiérrez <[email protected]> |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
declare(strict_types=1); |
|
13
|
|
|
|
|
14
|
|
|
namespace Gears\EventSourcing\Store\Event; |
|
15
|
|
|
|
|
16
|
|
|
use Gears\EventSourcing\Aggregate\AggregateVersion; |
|
17
|
|
|
use Gears\EventSourcing\Event\AggregateEventEmptyStream; |
|
18
|
|
|
use Gears\EventSourcing\Event\AggregateEventStream; |
|
19
|
|
|
use Gears\EventSourcing\Store\Event\Exception\ConcurrencyException; |
|
20
|
|
|
use Gears\EventSourcing\Store\Event\Exception\EventStoreException; |
|
21
|
|
|
use Gears\EventSourcing\Store\StoreStream; |
|
22
|
|
|
|
|
23
|
|
|
/** |
|
24
|
|
|
* In memory Event Store implementation. |
|
25
|
|
|
*/ |
|
26
|
|
|
abstract class AbstractEventStore implements EventStore |
|
27
|
|
|
{ |
|
28
|
|
|
/** |
|
29
|
|
|
* {@inheritdoc} |
|
30
|
|
|
*/ |
|
31
|
|
|
public function loadFrom( |
|
32
|
|
|
StoreStream $stream, |
|
33
|
|
|
AggregateVersion $fromVersion, |
|
34
|
|
|
?int $count = null |
|
35
|
|
|
): AggregateEventStream { |
|
36
|
|
|
if ($fromVersion->isEqualTo(new AggregateVersion(0))) { |
|
37
|
|
|
throw new EventStoreException( |
|
38
|
|
|
\sprintf('Event store load from version must be at least 1, "%s" given', $fromVersion->getValue()) |
|
39
|
|
|
); |
|
40
|
|
|
} |
|
41
|
|
|
if ($count !== null && $count < 1) { |
|
42
|
|
|
throw new EventStoreException(\sprintf('Event store load count must be at least 1, "%s" given', $count)); |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
if (!$this->streamExists($stream)) { |
|
46
|
|
|
return new AggregateEventEmptyStream(); |
|
47
|
|
|
} |
|
48
|
|
|
|
|
49
|
|
|
$toVersion = $count !== null |
|
50
|
|
|
? new AggregateVersion($fromVersion->getValue() + $count - 1) |
|
51
|
|
|
: null; |
|
52
|
|
|
|
|
53
|
|
|
return $this->loadEvents($stream, $fromVersion, $toVersion); |
|
54
|
|
|
} |
|
55
|
|
|
|
|
56
|
|
|
/** |
|
57
|
|
|
* {@inheritdoc} |
|
58
|
|
|
*/ |
|
59
|
|
|
public function loadTo( |
|
60
|
|
|
StoreStream $stream, |
|
61
|
|
|
AggregateVersion $toVersion, |
|
62
|
|
|
?AggregateVersion $fromVersion = null |
|
63
|
|
|
): AggregateEventStream { |
|
64
|
|
|
if ($toVersion->isEqualTo(new AggregateVersion(0))) { |
|
65
|
|
|
throw new EventStoreException( |
|
66
|
|
|
\sprintf('Event store load to version must be at least 1, "%s" given', $toVersion->getValue()) |
|
67
|
|
|
); |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
$fromVersion = $fromVersion ?? new AggregateVersion(1); |
|
71
|
|
|
if ($fromVersion->isEqualTo(new AggregateVersion(0))) { |
|
72
|
|
|
throw new EventStoreException( |
|
73
|
|
|
\sprintf('Event store load from version must be at least 1, "%s" given', $fromVersion->getValue()) |
|
74
|
|
|
); |
|
75
|
|
|
} |
|
76
|
|
|
if ($fromVersion->getValue() > $toVersion->getValue()) { |
|
77
|
|
|
throw new EventStoreException(\sprintf( |
|
78
|
|
|
'Event store load to version "%s" must be greater than from version "%s"', |
|
79
|
|
|
$toVersion->getValue(), |
|
80
|
|
|
$fromVersion->getValue() |
|
81
|
|
|
)); |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
if (!$this->streamExists($stream)) { |
|
85
|
|
|
return new AggregateEventEmptyStream(); |
|
86
|
|
|
} |
|
87
|
|
|
|
|
88
|
|
|
return $this->loadEvents($stream, $fromVersion, $toVersion); |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* Get aggregate event stream. |
|
93
|
|
|
* |
|
94
|
|
|
* @param StoreStream $stream |
|
95
|
|
|
* @param AggregateVersion $fromVersion |
|
96
|
|
|
* @param AggregateVersion|null $toVersion |
|
97
|
|
|
* |
|
98
|
|
|
* @return AggregateEventStream |
|
99
|
|
|
*/ |
|
100
|
|
|
abstract protected function loadEvents( |
|
101
|
|
|
StoreStream $stream, |
|
102
|
|
|
AggregateVersion $fromVersion, |
|
103
|
|
|
?AggregateVersion $toVersion = null |
|
104
|
|
|
): AggregateEventStream; |
|
105
|
|
|
|
|
106
|
|
|
/** |
|
107
|
|
|
* {@inheritdoc} |
|
108
|
|
|
*/ |
|
109
|
|
|
public function store(StoreStream $stream, AggregateEventStream $eventStream): void |
|
110
|
|
|
{ |
|
111
|
|
|
if ($eventStream->count() === 0) { |
|
112
|
|
|
return; |
|
113
|
|
|
} |
|
114
|
|
|
|
|
115
|
|
|
if (!$this->streamExists($stream)) { |
|
116
|
|
|
$this->createStream($stream); |
|
117
|
|
|
} |
|
118
|
|
|
|
|
119
|
|
|
$eventStream->rewind(); |
|
120
|
|
|
$expectedVersion = $eventStream->current()->getAggregateVersion()->getPrevious(); |
|
121
|
|
|
|
|
122
|
|
|
$currentVersion = $this->getStreamVersion($stream); |
|
123
|
|
|
if (!$currentVersion->isEqualTo($expectedVersion)) { |
|
124
|
|
|
throw new ConcurrencyException(\sprintf( |
|
125
|
|
|
'Expected stream version "%s" does not match current version "%s"', |
|
126
|
|
|
$expectedVersion->getValue(), |
|
127
|
|
|
$currentVersion->getValue() |
|
128
|
|
|
)); |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
foreach ($eventStream as $aggregateEvent) { |
|
132
|
|
|
$aggregateVersion = $aggregateEvent->getAggregateVersion(); |
|
133
|
|
|
|
|
134
|
|
|
if (!$aggregateVersion->getPrevious()->isEqualTo($currentVersion)) { |
|
135
|
|
|
throw new ConcurrencyException('Event stream cannot be stored due to versions mismatch'); |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
|
|
$currentVersion = $currentVersion->getNext(); |
|
139
|
|
|
} |
|
140
|
|
|
|
|
141
|
|
|
$eventStream->rewind(); |
|
142
|
|
|
$this->storeEvents($stream, $eventStream); |
|
143
|
|
|
} |
|
144
|
|
|
|
|
145
|
|
|
/** |
|
146
|
|
|
* Append events to store. |
|
147
|
|
|
* |
|
148
|
|
|
* @param StoreStream $stream |
|
149
|
|
|
* @param AggregateEventStream $eventStream |
|
150
|
|
|
*/ |
|
151
|
|
|
abstract protected function storeEvents(StoreStream $stream, AggregateEventStream $eventStream): void; |
|
152
|
|
|
|
|
153
|
|
|
/** |
|
154
|
|
|
* Check stream existence. |
|
155
|
|
|
* |
|
156
|
|
|
* @param StoreStream $stream |
|
157
|
|
|
* |
|
158
|
|
|
* @return bool |
|
159
|
|
|
*/ |
|
160
|
|
|
abstract protected function streamExists(StoreStream $stream): bool; |
|
161
|
|
|
|
|
162
|
|
|
/** |
|
163
|
|
|
* Create stream. |
|
164
|
|
|
* |
|
165
|
|
|
* @param StoreStream $stream |
|
166
|
|
|
*/ |
|
167
|
|
|
abstract protected function createStream(StoreStream $stream): void; |
|
168
|
|
|
|
|
169
|
|
|
/** |
|
170
|
|
|
* Get current stream version. |
|
171
|
|
|
* |
|
172
|
|
|
* @param StoreStream $stream |
|
173
|
|
|
* |
|
174
|
|
|
* @return AggregateVersion |
|
175
|
|
|
*/ |
|
176
|
|
|
abstract protected function getStreamVersion(StoreStream $stream): AggregateVersion; |
|
177
|
|
|
} |
|
178
|
|
|
|
phpgears /
event-sourcing
