Doctrine Cache Bundle Laravel Package

Getting Started

Minimal Setup

1. Installation (if still needed for legacy projects):

   composer require doctrine/doctrine-cache-bundle
   

   Note: For new projects, skip this and use Symfony’s native symfony/cache instead.

2. Configuration (if using legacy bundle): Add to config/packages/doctrine_cache.yaml:

   doctrine_cache:
       providers:
           my_provider:
               namespace: my_app.cache
               type: file_system
               directory: '%kernel.cache_dir%/doctrine'
   

3. First Use Case: Inject the cache provider into a service:

   use Doctrine\Common\Cache\CacheProvider;
   
   class MyService
   {
       private $cache;
   
       public function __construct(CacheProvider $cache)
       {
           $this->cache = $cache;
       }
   
       public function fetchData()
       {
           $key = 'my_key';
           if (!$this->cache->contains($key)) {
               $this->cache->save($key, $this->generateExpensiveData());
           }
           return $this->cache->fetch($key);
       }
   }
   

Implementation Patterns

Common Workflows

1. Cache Layer for Doctrine Queries: Use Doctrine\Common\Cache\CacheProvider to cache DQL queries:

   $cache = $this->cacheProvider->getItem('query_result');
   if (!$cache->isHit()) {
       $query = $entityManager->createQuery('SELECT u FROM User u');
       $cache->set($query->getResult());
   }
   return $cache->get();
   

2. Metadata Cache: Configure metadata_cache in config/packages/doctrine.yaml:

   doctrine:
       orm:
           metadata_cache_driver: doctrine_cache
   

3. Query Cache: Enable query caching in config/packages/doctrine.yaml:

   doctrine:
       orm:
           query_cache_driver: doctrine_cache
   

Integration Tips

• Symfony Cache Adapter: Bridge Doctrine Cache with Symfony’s CacheInterface:

  use Symfony\Component\Cache\Adapter\DoctrineProviderAdapter;
  
  $doctrineCache = $this->cacheProvider;
  $symfonyCache = new DoctrineProviderAdapter($doctrineCache);
  

• Autowiring: Define custom cache providers in services.yaml:

  services:
      App\Cache\MyCacheProvider:
          arguments:
              $provider: '@doctrine.cache.provider.my_provider'
  

• Environment-Specific Config: Use %env% for cache directory:

  doctrine_cache:
      providers:
          my_provider:
              directory: '%env(CACHE_DIR)%/doctrine'
  

Gotchas and Tips

Pitfalls

1. Deprecation Warning:

   • The bundle is abandoned; prefer Symfony’s symfony/cache or manual Doctrine Cache setup.
   • Example migration:

     # Old (deprecated)
     doctrine_cache: ~
     
     # New (recommended)
     framework:
         cache:
             app: cache.adapter.doctrine
     services:
         cache.adapter.doctrine:
             class: Symfony\Component\Cache\Adapter\DoctrineProviderAdapter
             arguments:
                 - '@doctrine.cache.provider.default'
     

2. Namespace Collisions:

   • Ensure namespace in doctrine_cache.yaml is unique (e.g., app.cache).
   • Avoid conflicts with other bundles using Doctrine Cache.

3. File Permissions:

   • If using file_system provider, ensure %kernel.cache_dir% is writable:

     chmod -R 775 %kernel.cache_dir%
     

4. Serialization Issues:

   • Doctrine Cache requires objects to be serializable. Use __serializeMagicMethods() or implement Serializable.

Debugging

• Cache Misses: Enable debug logging for Doctrine\Common\Cache:

  monolog:
      handlers:
          main:
              level: debug
              channels: ['doctrine']
  

• Clear Cache: Clear Doctrine Cache manually:

  $this->cacheProvider->deleteAll();
  

Extension Points

1. Custom Providers: Extend Doctrine\Common\Cache\CacheProvider for specialized storage (e.g., Redis):

   use Doctrine\Common\Cache\RedisCache;
   
   class RedisProvider extends RedisCache
   {
       public function __construct(\Redis $client, array $options = [])
       {
           parent::__construct($client, $options);
       }
   }
   

2. Event Listeners: Listen to cache.clear events (Symfony 4+):

   use Symfony\Component\Cache\CacheEvents;
   
   $cache->on(CacheEvents::CLEAR, function () {
       // Custom logic on cache clear
   });
   

3. Tag-Based Invalidation: Use Doctrine\Common\Cache\CacheProvider::delete() with tags (if supported by the provider):

   $this->cacheProvider->delete('tag:user_123');