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<?php |
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/* |
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* Copyright (c) 2012-2014 Janos Szurovecz |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy of |
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* this software and associated documentation files (the "Software"), to deal in |
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* the Software without restriction, including without limitation the rights to |
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies |
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* of the Software, and to permit persons to whom the Software is furnished to do |
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* so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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namespace predaddy\inmemory; |
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use ArrayIterator; |
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use Countable; |
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use Iterator; |
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use predaddy\domain\AggregateId; |
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use predaddy\domain\DomainEvent; |
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use predaddy\domain\eventsourcing\AbstractSnapshotEventStore; |
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use predaddy\domain\eventsourcing\EventSourcedAggregateRoot; |
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/** |
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* @author Janos Szurovecz <[email protected]> |
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*/ |
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final class InMemoryEventStore extends AbstractSnapshotEventStore |
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{ |
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private $events = []; |
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private $snapshots = []; |
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/** |
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* @param EventSourcedAggregateRoot $aggregateRoot |
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* @return void |
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*/ |
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protected function doCreateSnapshot(EventSourcedAggregateRoot $aggregateRoot) |
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{ |
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$this->snapshots[$this->createKey($aggregateRoot->getId())] = $aggregateRoot; |
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} |
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/** |
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* @param DomainEvent $event |
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* @return int version number |
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*/ |
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protected function doPersist(DomainEvent $event) |
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{ |
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self::getLogger()->debug('Persisting event into inmemory event store [{}]...', [$event]); |
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$key = $this->createKey($event->aggregateId()); |
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$this->events[$key][] = $event; |
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return count($this->events[$key]); |
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} |
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/** |
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* Must be return all events stored to aggregate identified by $aggregateId and $type. |
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* Events must be ordered by theirs persistent time. |
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* |
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* If the $stateHash parameter is set, the result will contain only the newer DomainEvents. |
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* |
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* @param AggregateId $aggregateId |
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* @param string $stateHash State hash |
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* @return Iterator|Countable |
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*/ |
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public function getEventsFor(AggregateId $aggregateId, $stateHash = null) |
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{ |
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$result = []; |
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$add = false; |
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$key = $this->createKey($aggregateId); |
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$events = array_key_exists($key, $this->events) ? $this->events[$key] : []; |
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/* @var $event DomainEvent */ |
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foreach ($events as $event) { |
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if ($add || $stateHash === null) { |
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$result[] = $event; |
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} elseif ($event->stateHash() === $stateHash) { |
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$add = true; |
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} |
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} |
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self::getLogger()->debug( |
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'Events for aggregate [{}] with state hash [{}] has been loaded', |
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[$aggregateId, $stateHash] |
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); |
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return new ArrayIterator($result); |
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} |
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/** |
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* @param AggregateId $aggregateId |
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* @return EventSourcedAggregateRoot|null |
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*/ |
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public function loadSnapshot(AggregateId $aggregateId) |
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{ |
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self::getLogger()->debug('Loading snapshot for aggregate [{}]...', [$aggregateId]); |
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$key = $this->createKey($aggregateId); |
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return array_key_exists($key, $this->snapshots) |
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? $this->snapshots[$key] |
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: null; |
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} |
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public function clean() |
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{ |
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$this->events = []; |
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$this->snapshots = []; |
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self::getLogger()->debug('Inmemory event store has been cleared'); |
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} |
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private function createKey(AggregateId $aggregateId) |
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{ |
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return $aggregateId->aggregateClass() . $aggregateId->value(); |
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} |
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} |
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szjani /
predaddy
