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<?php declare(strict_types=1); |
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/** |
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* This file is part of the daikon-cqrs/boot project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Daikon\Boot\Service\Provisioner; |
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use Auryn\Injector; |
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use Daikon\Config\ConfigProviderInterface; |
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use Daikon\Boot\Service\ServiceDefinitionInterface; |
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use Daikon\Boot\Service\ServiceDefinitionMap; |
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use Daikon\Dbal\Connector\ConnectorMap; |
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use Daikon\Interop\Assertion; |
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use Daikon\Interop\RuntimeException; |
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use Daikon\MessageBus\EnvelopeInterface; |
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use Daikon\MessageBus\Channel\Channel; |
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use Daikon\MessageBus\Channel\ChannelMap; |
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use Daikon\MessageBus\Channel\Subscription\LazySubscription; |
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use Daikon\MessageBus\Channel\Subscription\MessageHandler\MessageHandlerList; |
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use Daikon\MessageBus\Channel\Subscription\SubscriptionMap; |
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use Daikon\MessageBus\Channel\Subscription\Transport\TransportInterface; |
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use Daikon\MessageBus\Channel\Subscription\Transport\TransportMap; |
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use Daikon\MessageBus\MessageBusInterface; |
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use Daikon\Metadata\MetadataEnricherList; |
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final class MessageBusProvisioner implements ProvisionerInterface |
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{ |
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public const COMMANDS_CHANNEL = 'commands'; |
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public const COMMITS_CHANNEL = 'commits'; |
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public const EVENTS_CHANNEL = 'events'; |
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public function provision( |
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Injector $injector, |
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ConfigProviderInterface $configProvider, |
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ServiceDefinitionInterface $serviceDefinition |
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): void { |
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$serviceClass = $serviceDefinition->getServiceClass(); |
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$settings = $serviceDefinition->getSettings(); |
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if (!isset($settings['transports'])) { |
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throw new RuntimeException('Message bus transports configuration is required.'); |
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} |
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$injector |
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->delegate($serviceClass, $this->factory($injector, $serviceDefinition)) |
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->share($serviceClass) |
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->alias(MessageBusInterface::class, $serviceClass); |
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} |
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private function factory(Injector $injector, ServiceDefinitionInterface $serviceDefinition): callable |
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{ |
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return function ( |
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ConnectorMap $connectorMap, |
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ServiceDefinitionMap $serviceDefinitionMap |
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) use ( |
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$injector, |
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$serviceDefinition |
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): object { |
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$transportMap = $this->buildTransportMap($injector, $serviceDefinition, $connectorMap); |
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$channelSubs = $this->collectChannelSubscriptions($injector, $serviceDefinitionMap, $transportMap); |
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$channels = []; |
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foreach ($channelSubs as $channelKey => $subscriptions) { |
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Assertion::keyNotExists($channels, $channelKey, "Channel '$channelKey' is already defined."); |
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$channels[$channelKey] = new Channel($channelKey, new SubscriptionMap($subscriptions)); |
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} |
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$serviceClass = $serviceDefinition->getServiceClass(); |
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return new $serviceClass(new ChannelMap($channels)); |
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}; |
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} |
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private function buildTransportMap( |
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Injector $injector, |
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ServiceDefinitionInterface $serviceDefinition, |
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ConnectorMap $connectorMap |
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): TransportMap { |
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$transports = []; |
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$settings = $serviceDefinition->getSettings(); |
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foreach ($settings['transports'] as $transportKey => $transportConfig) { |
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Assertion::keyNotExists($transports, $transportKey, "Transport '$transportKey' is already defined."); |
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$arguments = [':key' => $transportKey]; |
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if (isset($transportConfig['dependencies']['connector'])) { |
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$arguments[':connector'] = $connectorMap->get($transportConfig['dependencies']['connector']); |
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} |
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$transports[$transportKey] = $injector->make($transportConfig['class'], $arguments); |
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} |
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return new TransportMap($transports); |
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} |
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private function collectChannelSubscriptions( |
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Injector $injector, |
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ServiceDefinitionMap $serviceDefinitionMap, |
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TransportMap $transportMap |
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): array { |
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$channelSubs = [self::COMMANDS_CHANNEL => [], self::COMMITS_CHANNEL => [], self::EVENTS_CHANNEL => []]; |
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foreach ($serviceDefinitionMap as $serviceDefinition) { |
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$this->registerServiceSubs($injector, $serviceDefinition, $transportMap, $channelSubs); |
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} |
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return $channelSubs; |
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} |
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private function registerServiceSubs( |
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Injector $injector, |
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ServiceDefinitionInterface $serviceDefinition, |
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TransportMap $transportMap, |
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array &$channelSubs |
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): void { |
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foreach ($serviceDefinition->getSubscriptions() as $subscriptionKey => $subscriptionConfig) { |
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$channelKey = $subscriptionConfig['channel']; |
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Assertion::keyNotExists( |
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$channelSubs[$channelKey], |
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$subscriptionKey, |
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"Subscription '$subscriptionKey' is already defined on channel '$channelKey'." |
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); |
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$transportKey = $subscriptionConfig['transport']; |
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if (!$transportMap->has($transportKey)) { |
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throw new RuntimeException("Message bus transport '$transportKey' has not been configured."); |
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} |
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$channelSubs[$channelKey][$subscriptionKey] = $this->buildLazySubscription( |
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$injector, |
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$serviceDefinition->getServiceClass(), |
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$subscriptionKey, |
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$subscriptionConfig, |
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$transportMap |
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); |
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} |
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} |
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private function buildLazySubscription( |
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Injector $injector, |
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string $serviceFqcn, |
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string $subscriptionKey, |
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array $subscriptionConfig, |
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TransportMap $transportMap |
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): LazySubscription { |
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$transportKey = $subscriptionConfig['transport']; |
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$guards = (array)($subscriptionConfig['guards'] ?? []); |
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return new LazySubscription( |
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$subscriptionKey, |
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/** |
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* @psalm-suppress InvalidNullableReturnType |
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* @psalm-suppress NullableReturnStatement |
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*/ |
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fn(): TransportInterface => $transportMap->get($transportKey), |
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fn(): MessageHandlerList => new MessageHandlerList([$injector->make($serviceFqcn)]), |
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function (EnvelopeInterface $envelope) use ($guards): bool { |
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$message = $envelope->getMessage(); |
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$interfaces = class_implements($message); |
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foreach ($guards as $guard) { |
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if ($message instanceof $guard || isset($interfaces[$guard])) { |
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return true; |
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} |
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} |
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return false; |
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}, |
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function () use ($injector, $subscriptionConfig): MetadataEnricherList { |
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$enrichers = []; |
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foreach ($subscriptionConfig['enrichers'] ?? [] as $enricherConfig) { |
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$enrichers[] = $injector->make( |
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$enricherConfig['class'], |
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[':settings' => $enricherConfig['settings'] ?? []] |
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); |
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} |
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return new MetadataEnricherList($enrichers); |
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} |
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); |
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} |
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} |
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daikon-cqrs /
boot
