Investigate low performance

models/classes/resources/RdfClass.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version 2
+ * of the License (non-upgradable).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
+ *
+ */
+
+declare(strict_types=1);
+
+namespace oat\tao\model\resources;
+
+class RdfClass extends RdfResource implements RdfClassInterface
+{
+
+}

models/classes/resources/RdfClassInterface.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version 2
+ * of the License (non-upgradable).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
+ *
+ */
+
+declare(strict_types=1);
+
+namespace oat\tao\model\resources;
+
+interface RdfClassInterface extends ResourceInterface
+{
+
+}

models/classes/resources/RdfResource.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version 2
+ * of the License (non-upgradable).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
+ *
+ */
+
+declare(strict_types=1);
+
+namespace oat\tao\model\resources;
+
+class RdfResource implements ResourceInterface
+{
+    /** @var string */
+    private $uri;
+    /** @var string */
+    private $label;
+
+    public function __construct(
+        string $uri,
+        string $label
+    )
+    {
+        $this->uri = $uri;
+        $this->label = $label;
+    }
+
+    public function getUri(): string
+    {
+        return $this->uri;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+}

models/classes/resources/ResourceCacheRepository.php

@@ -0,0 +1,203 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version 2
+ * of the License (non-upgradable).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
+ *
+ */
+
+declare(strict_types=1);
+
+namespace oat\tao\model\resources;
+
+use common_persistence_KeyValuePersistence;
+use core_kernel_classes_Class;
+use core_kernel_classes_Resource;
+use oat\generis\persistence\PersistenceManager;
+use oat\tao\model\service\InjectionAwareService;
+use RuntimeException;
+
+// TODO: warm up script is needed
+class ResourceCacheRepository extends InjectionAwareService implements ResourceRepositoryInterface
+{
+    /** @var ResourceRepository */
+    private $repository;
+    /** @var PersistenceManager */
+    private $persistenceManager;
+    /** @var string */
+    private $persistenceName;
+    /** @var common_persistence_KeyValuePersistence */
+    private $cache;
+
+    /**
+     * @noinspection MagicMethodsValidityInspection
+     * @noinspection PhpMissingParentConstructorInspection
+     *
+     * @param ResourceRepository $repository
+     * @param PersistenceManager $persistenceManager
+     * @param string             $persistenceName
+     */
+    public function __construct(
+        ResourceRepository $repository,
+        PersistenceManager $persistenceManager,
+        string $persistenceName
+    ) {
+        $this->repository = $repository;
+        $this->persistenceManager = $persistenceManager;
+        $this->persistenceName = $persistenceName;
+    }
+
+    public function find(string $uri): ResourceInterface
+    {
+        $cache = $this->getCache();
+
+        $key = $this->getResourceKey($uri);
+
+        $value = $cache->get($key);
+
+        if (false !== $value) {
+            return $this->unserializeResource($value);
+        }
+
+        $resource = $this->repository->find($uri);
+
+        $cache->set(
+            $key,
+            $this->serializeResource($resource)
+        );
+
+        return $resource;
+    }
+
+    public function findChildren(RdfClassInterface $class, bool $recursive): array
+    {
+        // TODO: move to factory
+        $key = sprintf('children:%s:%s', $class->getUri(), var_export($recursive, true));
+
+        $cache = $this->getCache();
+
+        $childrenUris = $cache->get($key);
+
+        if (false !== $childrenUris) {
+            $cachedChildren = [];
+
+            foreach (json_decode($childrenUris, true) as $uri) {
+                $cachedChildren[] = $this->find($uri);
+            }
+
+            return $cachedChildren;
+        }
+
+        $children = $this->repository->findChildren($class, $recursive);
+
+        $childrenUris = array_map(
+            static function (RdfClassInterface $child) {
+                return $child->getUri();
+            },
+            $children
+        );
+
+        $cache->set($key, json_encode($childrenUris));
+
+        return $children;
+    }
+
+    public function findInstances(RdfClassInterface $class, bool $recursive = false): array
+    {
+        $key = sprintf('instances:%s:%s', $class->getUri(), var_export($recursive, true));
+
+        $cache = $this->getCache();
+
+        $instancesUris = $cache->get($key);
+
+        if (false !== $instancesUris) {
+            $instances = [];
+
+            foreach (json_decode($instancesUris, true) as $uri) {
+                $instances[] = $this->find($uri);
+            }
+
+            return $instances;
+        }
+
+        $instances = $this->repository->findInstances($class, $recursive);
+
+        $instancesUrl = array_map(
+            static function (ResourceInterface $child) {
+                return $child->getUri();
+            },
+            $instances
+        );
+
+        $cache->set($key, json_encode($instancesUrl));
+
+        return $instances;
+    }
+
+    private function unserializeResource(string $serializedResource): ResourceInterface
+    {
+        //TODO: move to serializer
+
+        $json = json_decode($serializedResource, true);
+
+        switch ($json['type']) {
+            case core_kernel_classes_Class::class:
+                return new RdfClass(
+                    $json['payload']['uri'], $json['payload']['label']
+                );
+                break;
+            case core_kernel_classes_Resource::class:
+                return new RdfResource(
+                    $json['payload']['uri'], $json['payload']['label']
+                );
+                break;
+        }
+
+        throw new RuntimeException(sprintf('Type %s is not supported', $json['type']));
+    }
+
+    private function serializeResource(ResourceInterface $resource): string
+    {
+        //TODO: move to serializer
+
+        return json_encode(
+            [
+                'type'    => get_class($resource),
+                'payload' => [
+                    'uri'   => $resource->getUri(),
+                    'label' => $resource->getLabel()
+                ]
+            ]
+        );
+    }
+
+    private function getResourceKey(string $uri): string
+    {
+        //TODO: move to factory
+
+        return 'resource:' . $uri;
+    }
+
+    private function getCache(): common_persistence_KeyValuePersistence
+    {
+        if ($this->cache) {
+            return $this->cache;
+        }
+
+        $this->cache = $this->persistenceManager->getPersistenceById($this->persistenceName);
+
+        return $this->cache;
+    }
+}

models/classes/resources/ResourceInterface.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; under version 2
+ * of the License (non-upgradable).
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * Copyright (c) 2020 (original work) Open Assessment Technologies SA;
+ *
+ */
+
+declare(strict_types=1);
+
+namespace oat\tao\model\resources;
+
+interface ResourceInterface
+{
+    public function getUri();
+    public function getLabel();
+}