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# config/packages/messenger.yaml
framework:
    messenger:
        # Serializzatore personalizzato per gestire entità Pimcore
        default_serializer: App\Messenger\Serializer\PimcoreMessageSerializer
        
        # Configurazione failure transport globale
        failure_transport: failed
        
        transports:
            # Transport ad alta priorità per operazioni critiche
            # Usa Redis Streams per bassa latenza
            async_high:
                dsn: '%env(REDIS_MESSENGER_DSN)%'
                options:
                    stream: pimcore_high_priority
                    group: pimcore_workers
                    consumer: '%env(HOSTNAME)%'
                    auto_setup: true
                    # Claim messaggi orfani dopo 5 minuti
                    claim_interval: 300000
                retry_strategy:
                    max_retries: 3
                    delay: 1000
                    multiplier: 2
                    max_delay: 30000
            
            # Transport per operazioni bulk (importazioni massive)
            # Usa RabbitMQ per migliore gestione della backpressure
            async_bulk:
                dsn: '%env(RABBITMQ_MESSENGER_DSN)%'
                options:
                    exchange:
                        name: pimcore_bulk
                        type: direct
                    queues:
                        pimcore_bulk_queue:
                            binding_keys: [bulk]
                    # Prefetch basso per distribuire il carico
                    prefetch_count: 5
                retry_strategy:
                    max_retries: 5
                    delay: 5000
                    multiplier: 3
                    max_delay: 3600000 # 1 ora max tra retry
            
            # Transport per elaborazione asset (thumbnail, video encoding)
            asset_processing:
                dsn: '%env(REDIS_MESSENGER_DSN)%'
                options:
                    stream: pimcore_assets
                    group: asset_workers
                    consumer: '%env(HOSTNAME)%'
                retry_strategy:
                    max_retries: 2
                    delay: 10000
                    multiplier: 2
            
            # Transport per sincronizzazione con sistemi esterni
            sync_external:
                dsn: '%env(RABBITMQ_MESSENGER_DSN)%'
                options:
                    exchange:
                        name: pimcore_sync
                        type: topic
                    queues:
                        erp_sync:
                            binding_keys: ['sync.erp.*']
                        ecommerce_sync:
                            binding_keys: ['sync.ecommerce.*']
                retry_strategy:
                    max_retries: 10
                    delay: 60000
                    multiplier: 2
                    max_delay: 7200000 # 2 ore max
            
            # Dead letter queue per messaggi falliti
            failed:
                dsn: 'doctrine://default?queue_name=failed_messages'
            
            # Transport sincrono per test
            sync:
                dsn: 'sync://'
        
        routing:
            # Routing basato sulla classe del messaggio
            'App\Message\HighPriority\*': async_high
            'App\Message\Bulk\*': async_bulk
            'App\Message\Asset\*': asset_processing
            'App\Message\Sync\*': sync_external
            # Default per messaggi non categorizzati
            '*': async_high

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# .env.local
REDIS_MESSENGER_DSN=redis://localhost:6379/messages?serializer=1
RABBITMQ_MESSENGER_DSN=amqp://guest:guest@localhost:5672/%2f/messages

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<?php
// src/EventSubscriber/DataObjectEventSubscriber.php

declare(strict_types=1);

namespace App\EventSubscriber;

use App\Message\Bulk\ReindexProductMessage;
use App\Message\Bulk\ResyncCategoryProductsMessage;
use App\Message\HighPriority\InvalidateCacheMessage;
use App\Message\Sync\SyncToErpMessage;
use App\Message\Sync\SyncToEcommerceMessage;
use Pimcore\Event\DataObjectEvents;
use Pimcore\Event\Model\DataObjectEvent;
use Pimcore\Model\DataObject\AbstractObject;
use Pimcore\Model\DataObject\Product;
use Pimcore\Model\DataObject\Category;
use Psr\Log\LoggerInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Messenger\MessageBusInterface;
use Symfony\Component\Messenger\Stamp\DelayStamp;
use Symfony\Component\Messenger\Stamp\TransportNamesStamp;

final class DataObjectEventSubscriber implements EventSubscriberInterface
{
    // Flag per prevenire loop infiniti durante operazioni batch
    private static bool $processingBatch = false;
    
    public function __construct(
        private readonly MessageBusInterface $messageBus,
        private readonly LoggerInterface $logger,
    ) {}
    
    public static function getSubscribedEvents(): array
    {
        return [
            DataObjectEvents::POST_UPDATE => ['onPostUpdate', 0],
            DataObjectEvents::POST_ADD => ['onPostAdd', 0],
            DataObjectEvents::POST_DELETE => ['onPostDelete', 0],
            // Evento custom per fine batch
            'pimcore.dataobject.batch.complete' => ['onBatchComplete', -100],
        ];
    }
    
    public function onPostUpdate(DataObjectEvent $event): void
    {
        $object = $event->getObject();
        
        // Ignora se siamo dentro un'operazione batch o se è una versione draft
        if (self::$processingBatch || !$object->isPublished()) {
            return;
        }
        
        // Ignora modifiche automatiche da Pimcore (es. saveVersion internals)
        if ($this->isInternalUpdate($event)) {
            return;
        }
        
        $this->dispatchForObject($object, 'update');
    }
    
    public function onPostAdd(DataObjectEvent $event): void
    {
        $object = $event->getObject();
        
        if (self::$processingBatch || !$object->isPublished()) {
            return;
        }
        
        $this->dispatchForObject($object, 'create');
    }
    
    public function onPostDelete(DataObjectEvent $event): void
    {
        $object = $event->getObject();
        
        // Per delete processiamo anche se siamo in batch,
        // ma con priorità diversa
        $this->dispatchForObject($object, 'delete', self::$processingBatch);
    }
    
    public function onBatchComplete(): void
    {
        self::$processingBatch = false;
    }
    
    private function dispatchForObject(
        AbstractObject $object, 
        string $operation,
        bool $lowPriority = false
    ): void {
        $objectId = $object->getId();
        $className = $object->getClassName();
        
        $this->logger->info('Dispatching messages for object', [
            'id' => $objectId,
            'class' => $className,
            'operation' => $operation,
        ]);
        
        // Strategia di dispatch basata sul tipo di oggetto
        match (true) {
            $object instanceof Product => $this->handleProductChange($object, $operation, $lowPriority),
            $object instanceof Category => $this->handleCategoryChange($object, $operation, $lowPriority),
            default => $this->handleGenericChange($object, $operation),
        };
    }
    
    private function handleProductChange(
        Product $product, 
        string $operation,
        bool $lowPriority
    ): void {
        $stamps = [];
        
        // In low priority (durante batch), aggiungiamo delay per non sovraccaricare
        if ($lowPriority) {
            $stamps[] = new DelayStamp(5000); // 5 secondi di delay
        }
        
        // 1. Invalida cache immediatamente (alta priorità)
        $this->messageBus->dispatch(
            new InvalidateCacheMessage(
                objectId: $product->getId(),
                objectType: 'Product',
                cacheKeys: $this->buildCacheKeys($product),
            ),
            [new TransportNamesStamp(['async_high'])]
        );
        
        // 2. Reindicizza per search (può aspettare)
        $this->messageBus->dispatch(
            new ReindexProductMessage(
                productId: $product->getId(),
                operation: $operation,
                changedFields: $this->detectChangedFields($product),
            ),
            array_merge($stamps, [new TransportNamesStamp(['async_bulk'])])
        );
        
        // 3. Sincronizza con ERP (se configurato e non in delete)
        if ($operation !== 'delete' && $product->getSyncToErp()) {
            $this->messageBus->dispatch(
                new SyncToErpMessage(
                    productId: $product->getId(),
                    sku: $product->getSku(),
                    operation: $operation,
                ),
                [new TransportNamesStamp(['sync_external'])]
            );
        }
        
        // 4. Sincronizza con e-commerce
        if ($product->getPublishToWeb()) {
            $this->messageBus->dispatch(
                new SyncToEcommerceMessage(
                    productId: $product->getId(),
                    channels: $product->getSalesChannels() ?? ['default'],
                    operation: $operation,
                ),
                [
                    new TransportNamesStamp(['sync_external']),
                    // Delay per dare tempo alla cache di invalidarsi
                    new DelayStamp(2000),
                ]
            );
        }
    }
    
    private function handleCategoryChange(
        Category $category, 
        string $operation, 
        bool $lowPriority
    ): void {
        // Una modifica categoria impatta tutti i prodotti figli
        $this->messageBus->dispatch(
            new InvalidateCacheMessage(
                objectId: $category->getId(),
                objectType: 'Category',
                cacheKeys: ["category_{$category->getId()}", "category_tree"],
                propagateToChildren: true,
            )
        );
        
        // Per operazioni su categorie, schedula re-sync di tutti i prodotti
        // con delay significativo per evitare thundering herd
        if ($operation === 'update') {
            $this->messageBus->dispatch(
                new ResyncCategoryProductsMessage(
                    categoryId: $category->getId(),
                    recursive: true,
                ),
                [
                    new TransportNamesStamp(['async_bulk']),
                    new DelayStamp(30000), // 30 secondi
                ]
            );
        }
    }
    
    private function handleGenericChange(AbstractObject $object, string $operation): void
    {
        // Fallback per altri tipi di oggetto
        $this->messageBus->dispatch(
            new InvalidateCacheMessage(
                objectId: $object->getId(),
                objectType: $object->getClassName(),
                cacheKeys: [strtolower($object->getClassName()) . "_{$object->getId()}"],
            )
        );
    }
    
    /**
     * Abilita modalità batch per importazioni massive.
     * Chiamato esternamente prima di operazioni bulk.
     */
    public static function enableBatchMode(): void
    {
        self::$processingBatch = true;
    }
    
    public static function disableBatchMode(): void
    {
        self::$processingBatch = false;
    }
    
    private function isInternalUpdate(DataObjectEvent $event): bool
    {
        $arguments = $event->getArguments();
        return isset($arguments['isAutoSave']) && $arguments['isAutoSave'] === true;
    }
    
    private function buildCacheKeys(Product $product): array
    {
        $keys = [
            "product_{$product->getId()}",
            "product_sku_{$product->getSku()}",
        ];
        
        // Aggiungi chiavi per categorie associate
        foreach ($product->getCategories() ?? [] as $category) {
            $keys[] = "category_{$category->getId()}_products";
        }
        
        return $keys;
    }
    
    private function detectChangedFields(Product $product): array
    {
        // Pimcore mantiene i valori originali in memoria.
        // In produzione useresti un servizio dedicato che traccia le modifiche.
        return [];
    }
}

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<?php
// src/Message/Sync/SyncToErpMessage.php

declare(strict_types=1);

namespace App\Message\Sync;

use DateTimeImmutable;

/**
 * Messaggio per sincronizzazione prodotto verso ERP.
 * 
 * Immutabile e serializzabile. Contiene solo ID e dati
 * necessari per identificare l'operazione, non l'intero oggetto.
 */
final readonly class SyncToErpMessage
{
    public function __construct(
        public int $productId,
        public string $sku,
        public string $operation, // 'create', 'update', 'delete'
        public ?string $correlationId = null, // Per tracciare saga
        public int $retryCount = 0,
        public ?DateTimeImmutable $originalTimestamp = null,
    ) {}
    
    /**
     * Factory per creare messaggio di retry con contesto preservato.
     */
    public function forRetry(): self
    {
        return new self(
            productId: $this->productId,
            sku: $this->sku,
            operation: $this->operation,
            correlationId: $this->correlationId,
            retryCount: $this->retryCount + 1,
            originalTimestamp: $this->originalTimestamp ?? new DateTimeImmutable(),
        );
    }
    
    /**
     * Identifica univocamente questa operazione per deduplicazione.
     */
    public function getDeduplicationKey(): string
    {
        return sprintf('erp_sync_%s_%s', $this->sku, $this->operation);
    }
}

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<?php
// src/Saga/ProductPublishSaga.php

declare(strict_types=1);

namespace App\Saga;

use App\Message\Asset\GenerateThumbnailsMessage;
use App\Message\Bulk\ReindexProductMessage;
use App\Message\Sync\SyncToEcommerceMessage;
use App\Saga\State\ProductPublishState;
use Psr\Log\LoggerInterface;
use Symfony