AbstractEventStore::streamExists() - Code Metrics - DDDominio/event-sourcing - Measure and Improve Code Quality continuously with Scrutinizer

AbstractEventStore::streamExists()
last analyzed 2020-12-19 16:20 UTC

↳ Parent: AbstractEventStore

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Ratio	0 %

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dl	0
loc	1
ccs	0
cts	0
cp	0
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nc	1

<?php

namespace DDDominio\EventSourcing\EventStore;

use DDDominio\EventSourcing\Common\DomainEvent;
use DDDominio\EventSourcing\Common\EventStreamInterface;
use DDDominio\EventSourcing\Serialization\SerializerInterface;
use DDDominio\EventSourcing\Versioning\EventUpgraderInterface;
use DDDominio\EventSourcing\Versioning\UpgradableEventStoreInterface;
use DDDominio\EventSourcing\Versioning\Version;
use Ramsey\Uuid\Uuid;

abstract class AbstractEventStore implements EventStoreInterface, UpgradableEventStoreInterface
{
    /**
     * @var SerializerInterface
     */
    private $serializer;

    /**
     * @var EventUpgraderInterface
     */
    private $eventUpgrader;

    /**
     * @var EventStoreListenerInterface[]|callable[]
     */
    private $eventListeners;

    /**
     * @param SerializerInterface $serializer
     * @param EventUpgraderInterface $eventUpgrader
     */
    public function __construct(
        SerializerInterface $serializer,
        EventUpgraderInterface $eventUpgrader
    ) {
        $this->serializer = $serializer;
        $this->eventUpgrader = $eventUpgrader;
    }

    /**
     * @param string $streamId
     * @param DomainEvent[] $events
     * @param int $expectedVersion
     * @throws ConcurrencyException
     * @throws EventStreamDoesNotExistException
     */
    public function appendToStream($streamId, $events, $expectedVersion = self::EXPECTED_VERSION_EMPTY_STREAM)
    {
        if ($this->streamExists($streamId)) {
            $this->assertOptimisticConcurrency($streamId, $expectedVersion);
        } else {
            $this->assertEventStreamExistence($streamId, $expectedVersion);
        }
        $this->executeEventListeners($events, EventStoreEvents::PRE_APPEND);
        $this->appendStoredEvents(
            $streamId,
            $this->storedEventsFromEvents($streamId, $events),
            $expectedVersion
        );
        $this->executeEventListeners($events, EventStoreEvents::POST_APPEND);
    }

    /**
     * @param EventStreamInterface $eventStream
     * @return EventStreamInterface
     */
    protected function domainEventStreamFromStoredEvents($eventStream)
    {
        return $eventStream->map(function (StoredEvent $storedEvent) {
            $this->eventUpgrader->migrate($storedEvent);
            return new DomainEvent(
                $this->serializer->deserialize($storedEvent->data(), $storedEvent->type()),
                json_decode($storedEvent->metadata(), true),
                $storedEvent->occurredOn(),
                $storedEvent->version()
            );
        });
    }

    /**
     * @param string $streamId
     * @param int $expectedVersion
     * @throws ConcurrencyException
     */
    private function assertOptimisticConcurrency($streamId, $expectedVersion)
    {
        if ($expectedVersion !== self::EXPECTED_VERSION_ANY
            && $expectedVersion !== $this->streamVersion($streamId)) {
            throw ConcurrencyException::fromVersions(
                $this->streamVersion($streamId),
                $expectedVersion
            );
        }
    }

    /**
     * @param string $streamId
     * @param int $expectedVersion
     * @throws EventStreamDoesNotExistException
     */
    private function assertEventStreamExistence($streamId, $expectedVersion)
    {
        if ($expectedVersion > 0) {
            throw EventStreamDoesNotExistException::fromStreamId($streamId);
        }
    }

    /**
     * @param string $streamId
     * @param DomainEvent[] $events
     * @return array
     */
    private function storedEventsFromEvents($streamId, $events)
    {
        return array_map(function (DomainEvent $event) use ($streamId) {
            return new StoredEvent(
                $this->nextStoredEventId(),
                $streamId,
                get_class($event->data()),
                $this->serializer->serialize($event->data()),
                json_encode($event->metadata()->all(), JSON_FORCE_OBJECT),
                $event->occurredOn(),
                is_null($event->version()) ? Version::fromString('1.0') : $event->version()
            );
        }, $events);
    }

    /**
     * @return string
     */
    protected function nextStoredEventId()
    {
        return Uuid::uuid4()->toString();
    }

    /**
     * @param string $type
     * @param Version $from
     * @param Version $to
     */
    public function migrate($type, $from, $to)
    {
        foreach ($this->readStoredEventsOfTypeAndVersion($type, $from) as $event) {
            $this->eventUpgrader->migrate($event, $to);
        }
    }

    /**
     * @param $eventStoreEvent
     * @param EventStoreListenerInterface|callable $eventStoreListener
     */
    public function addEventListener($eventStoreEvent, $eventStoreListener)
    {
        $this->eventListeners[$eventStoreEvent][] = $eventStoreListener;
    }

    /**
     * @param string $streamId
     * @param StoredEvent[] $storedEvents
     * @param int $expectedVersion
     */
    abstract protected function appendStoredEvents($streamId, $storedEvents, $expectedVersion);

    /**
     * @param string $streamId
     * @return bool
     */
    abstract protected function streamExists($streamId);

    /**
     * @param string $streamId
     * @return int
     */
    abstract protected function streamVersion($streamId);

    /**
     * @param string $type
     * @param Version $version
     * @return EventStreamInterface
     */
    abstract protected function readStoredEventsOfTypeAndVersion($type, $version);

    /**
     * @param DomainEvent[] $events
     * @param string $eventStoreEvent
     */
    protected function executeEventListeners($events, $eventStoreEvent)
    {
        if (isset($this->eventListeners[$eventStoreEvent])) {
            foreach ($this->eventListeners[$eventStoreEvent] as $eventListener) {

                if ($eventListener instanceof EventStoreListenerInterface) {
                    $eventListener->handle($events);
                } else {
                    $eventListener($events);
                }
            }
        }
    }
}


1		<?php
2
3		namespace DDDominio\EventSourcing\EventStore;
4
5		use DDDominio\EventSourcing\Common\DomainEvent;
6		use DDDominio\EventSourcing\Common\EventStreamInterface;
7		use DDDominio\EventSourcing\Serialization\SerializerInterface;
8		use DDDominio\EventSourcing\Versioning\EventUpgraderInterface;
9		use DDDominio\EventSourcing\Versioning\UpgradableEventStoreInterface;
10		use DDDominio\EventSourcing\Versioning\Version;
11		use Ramsey\Uuid\Uuid;
12
13		abstract class AbstractEventStore implements EventStoreInterface, UpgradableEventStoreInterface
14		{
15		/**
16		* @var SerializerInterface
17		*/
18		private $serializer;
19
20		/**
21		* @var EventUpgraderInterface
22		*/
23		private $eventUpgrader;
24
25		/**
26		* @var EventStoreListenerInterface[]\|callable[]
27		*/
28		private $eventListeners;
29
30		/**
31		* @param SerializerInterface $serializer
32		* @param EventUpgraderInterface $eventUpgrader
33		*/
34	79	public function __construct(
35		SerializerInterface $serializer,
36		EventUpgraderInterface $eventUpgrader
37		) {
38	79	$this->serializer = $serializer;
39	79	$this->eventUpgrader = $eventUpgrader;
40	79	}
41
42		/**
43		* @param string $streamId
44		* @param DomainEvent[] $events
45		* @param int $expectedVersion
46		* @throws ConcurrencyException
47		* @throws EventStreamDoesNotExistException
48		*/
49	44	public function appendToStream($streamId, $events, $expectedVersion = self::EXPECTED_VERSION_EMPTY_STREAM)
50		{
51	44	if ($this->streamExists($streamId)) {
52	9	$this->assertOptimisticConcurrency($streamId, $expectedVersion);
53		} else {
54	40	$this->assertEventStreamExistence($streamId, $expectedVersion);
55		}
56	40	$this->executeEventListeners($events, EventStoreEvents::PRE_APPEND);
57	40	$this->appendStoredEvents(
58		$streamId,
59	40	$this->storedEventsFromEvents($streamId, $events),
60		$expectedVersion
61		);
62	38	$this->executeEventListeners($events, EventStoreEvents::POST_APPEND);
63	38	}
64
65		/**
66		* @param EventStreamInterface $eventStream
67		* @return EventStreamInterface
68		*/
69		protected function domainEventStreamFromStoredEvents($eventStream)
70		{
71	43	return $eventStream->map(function (StoredEvent $storedEvent) {
72	38	$this->eventUpgrader->migrate($storedEvent);
73	38	return new DomainEvent(
74	38	$this->serializer->deserialize($storedEvent->data(), $storedEvent->type()),
75	38	json_decode($storedEvent->metadata(), true),
76	38	$storedEvent->occurredOn(),
77	38	$storedEvent->version()
78		);
79	43	});
80		}
81
82		/**
83		* @param string $streamId
84		* @param int $expectedVersion
85		* @throws ConcurrencyException
86		*/
87	9	private function assertOptimisticConcurrency($streamId, $expectedVersion)
88		{
89	9	if ($expectedVersion !== self::EXPECTED_VERSION_ANY
90	9	&& $expectedVersion !== $this->streamVersion($streamId)) {
91	3	throw ConcurrencyException::fromVersions(
92	3	$this->streamVersion($streamId),
93		$expectedVersion
94		);
95		}
96	6	}
97
98		/**
99		* @param string $streamId
100		* @param int $expectedVersion
101		* @throws EventStreamDoesNotExistException
102		*/
103	40	private function assertEventStreamExistence($streamId, $expectedVersion)
104		{
105	40	if ($expectedVersion > 0) {
106	3	throw EventStreamDoesNotExistException::fromStreamId($streamId);
107		}
108	37	}
109
110		/**
111		* @param string $streamId
112		* @param DomainEvent[] $events
113		* @return array
114		*/
115		private function storedEventsFromEvents($streamId, $events)
116		{
117	40	return array_map(function (DomainEvent $event) use ($streamId) {
118	40	return new StoredEvent(
119	40	$this->nextStoredEventId(),
120		$streamId,
121	40	get_class($event->data()),
122	40	$this->serializer->serialize($event->data()),
123	40	json_encode($event->metadata()->all(), JSON_FORCE_OBJECT),
124	40	$event->occurredOn(),
125	40	is_null($event->version()) ? Version::fromString('1.0') : $event->version()
126		);
127	40	}, $events);
128		}
129
130		/**
131		* @return string
132		*/
133	40	protected function nextStoredEventId()
134		{
135	40	return Uuid::uuid4()->toString();
136		}
137
138		/**
139		* @param string $type
140		* @param Version $from
141		* @param Version $to
142		*/
143	3	public function migrate($type, $from, $to)
144		{
145	3	foreach ($this->readStoredEventsOfTypeAndVersion($type, $from) as $event) {
146	3	$this->eventUpgrader->migrate($event, $to);
147		}
148	3	}
149
150		/**
151		* @param $eventStoreEvent
152		* @param EventStoreListenerInterface\|callable $eventStoreListener
153		*/
154	4	public function addEventListener($eventStoreEvent, $eventStoreListener)
155		{
156	4	$this->eventListeners[$eventStoreEvent][] = $eventStoreListener;
157	4	}
158
159		/**
160		* @param string $streamId
161		* @param StoredEvent[] $storedEvents
162		* @param int $expectedVersion
163		*/
164		abstract protected function appendStoredEvents($streamId, $storedEvents, $expectedVersion);
165
166		/**
167		* @param string $streamId
168		* @return bool
169		*/
170		abstract protected function streamExists($streamId);
171
172		/**
173		* @param string $streamId
174		* @return int
175		*/
176		abstract protected function streamVersion($streamId);
177
178		/**
179		* @param string $type
180		* @param Version $version
181		* @return EventStreamInterface
182		*/
183		abstract protected function readStoredEventsOfTypeAndVersion($type, $version);
184
185		/**
186		* @param DomainEvent[] $events
187		* @param string $eventStoreEvent
188		*/
189	40	protected function executeEventListeners($events, $eventStoreEvent)
190		{
191	40	if (isset($this->eventListeners[$eventStoreEvent])) {
192	4	foreach ($this->eventListeners[$eventStoreEvent] as $eventListener) {
		0 ignored issues – show Bug introduced 2017-02-11 16:14 UTC by Report Bug Copy Issue Report The expression `$this->eventListeners[$eventStoreEvent]` of type `callable` is not traversable. Loading history...
193	4	if ($eventListener instanceof EventStoreListenerInterface) {
194	1	$eventListener->handle($events);
195		} else {
196	4	$eventListener($events);
197		}
198		}
199		}
200	40	}
201		}
202

DDDominio / event-sourcing

AbstractEventStore::streamExists() last analyzed 2020-12-19 16:20 UTC

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AbstractEventStore::streamExists()
last analyzed 2020-12-19 16:20 UTC