Add array cache repository to reduce load on cache backend

lib/Alchemy/Phrasea/Core/Provider/RepositoriesServiceProvider.php

@@ -22,6 +22,7 @@ use Alchemy\Phrasea\Collection\Reference\DbalCollectionReferenceRepository;
 use Alchemy\Phrasea\Collection\Repository\ArrayCacheCollectionRepository;
 use Alchemy\Phrasea\Collection\Repository\CachedCollectionRepository;
 use Alchemy\Phrasea\Collection\Repository\DbalCollectionRepository;
+use Alchemy\Phrasea\Databox\ArrayCacheDataboxRepository;
 use Alchemy\Phrasea\Databox\CachingDataboxRepositoryDecorator;
 use Alchemy\Phrasea\Databox\DataboxConnectionProvider;
 use Alchemy\Phrasea\Databox\DataboxFactory;
@@ -156,7 +157,7 @@ class RepositoriesServiceProvider implements ServiceProviderInterface
 
             $factory->setDataboxRepository($repository);
 
-            return $repository;
+            return new ArrayCacheDataboxRepository($repository);
         });
 
         $app['repo.fields.factory'] = $app->protect(function (\databox $databox) use ($app) {

lib/Alchemy/Phrasea/Databox/ArrayCacheDataboxRepository.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace Alchemy\Phrasea\Databox;
+
+class ArrayCacheDataboxRepository implements DataboxRepository
+{
+    /**
+     * @var DataboxRepository
+     */
+    private $repository;
+
+    /**
+     * @var bool
+     */
+    private $loaded = false;
+
+    /**
+     * @var \databox[]
+     */
+    private $databoxes = [];
+
+    /**
+     * @param DataboxRepository $repository
+     */
+    public function __construct(DataboxRepository $repository)
+    {
+        $this->repository = $repository;
+    }
+
+    /**
+     * @param int $id
+     * @return \databox
+     */
+    public function find($id)
+    {
+        $this->load();
+
+        if (! isset($this->databoxes[$id])) {
+            return null;
+        }
+
+        return $this->databoxes[$id];
+    }
+
+    /**
+     * @return \databox[]
+     */
+    public function findAll()
+    {
+        $this->load();
+
+        return $this->databoxes;
+    }
+
+    /**
+     * @param \databox $databox
+     */
+    public function save(\databox $databox)
+    {
+        $this->loaded = false;
+        $this->databoxes = [];
+
+        return $this->repository->save($databox);
+    }
+
+    private function load()
+    {
+        if (! $this->loaded) {
+            $this->databoxes = $this->repository->findAll();
+            $this->loaded = true;
+        }
+    }
+}

lib/Alchemy/Phrasea/Databox/CachingDataboxRepositoryDecorator.php

@@ -22,11 +22,17 @@ final class CachingDataboxRepositoryDecorator implements DataboxRepository
     /** @var DataboxFactory */
     private $factory;
 
+    /**
+     * @param DataboxRepository $repository
+     * @param Cache $cache
+     * @param string $cacheKey
+     * @param DataboxFactory $factory
+     */
     public function __construct(DataboxRepository $repository, Cache $cache, $cacheKey, DataboxFactory $factory)
     {
         $this->repository = $repository;
         $this->cache = $cache;
-        $this->cacheKey = $cacheKey;
+        $this->cacheKey = 'databoxes:' . hash('sha256', $cacheKey);
         $this->factory = $factory;
     }
 
@@ -60,7 +66,7 @@ final class CachingDataboxRepositoryDecorator implements DataboxRepository
     {
         $this->cache->delete($this->cacheKey);
 
-        $this->repository->save($databox);
+        return $this->repository->save($databox);
     }
 
     /**