change architecture from inheritance to composition

7 files changed, 130 insertions, 64 deletions

diff --git a/lib/private/files/filesystem.php b/lib/private/files/filesystem.php
index 71d70bbf2a5..4774d25ad9e 100644
--- a/lib/private/files/filesystem.php
+++ b/lib/private/files/filesystem.php
@@ -325,32 +325,36 @@ class Filesystem {
 		$userObject = \OC_User::getManager()->get($user);
 
 		if (!is_null($userObject)) {
-			$homeStorage = \OC_Config::getValue( 'objectstore', array(
-				//default home storage configuration:
-				'class' => '\OC\Files\Storage\Home',
-				'arguments' => array()
-			));
-			// sanity checks
-			if (empty($homeStorage['class'])) {
-				\OCP\Util::writeLog('files', 'No class given for objectstore', \OCP\Util::ERROR);
-			}
-			if (!isset($homeStorage['arguments'])) {
-				$homeStorage['arguments'] = array();
+			$homeStorage = \OC_Config::getValue( 'objectstore' );
+			if (!empty($homeStorage)) {
+				// sanity checks
+				if (empty($homeStorage['class'])) {
+					\OCP\Util::writeLog('files', 'No class given for objectstore', \OCP\Util::ERROR);
+				}
+				if (!isset($homeStorage['arguments'])) {
+					$homeStorage['arguments'] = array();
+				}
+				// instantiate object store implementation
+				$homeStorage['arguments']['objectstore'] = new $homeStorage['class']($homeStorage['arguments']);
+				// mount with home object store implementation
+				$homeStorage['class'] = '\OC\Files\ObjectStore\HomeObjectStoreStorage';
+			} else {
+				$homeStorage = array(
+					//default home storage configuration:
+					'class' => '\OC\Files\Storage\Home',
+					'arguments' => array()
+				);
 			}
 			$homeStorage['arguments']['user'] = $userObject;
+
 			// check for legacy home id (<= 5.0.12)
 			if (\OC\Files\Cache\Storage::exists('local::' . $root . '/')) {
 				$homeStorage['arguments']['legacy'] = true;
 			}
+
 			self::mount($homeStorage['class'], $homeStorage['arguments'], $user);
 
 			$home = \OC\Files\Filesystem::getStorage($user);
-			if ( $home->instanceOfStorage('\OC\Files\ObjectStore\AbstractObjectStore') ) {
-				//create the files folder in the cache when mounting the objectstore for a user
-				if ( ! $home->is_dir('files') ) {
-					$home->mkdir('files');
-				}
-			}
 		}
 		else {
 			self::mount('\OC\Files\Storage\Local', array('datadir' => $root), $user);
diff --git a/lib/private/files/objectstore/homeobjectstorestorage.php b/lib/private/files/objectstore/homeobjectstorestorage.php
new file mode 100644
index 00000000000..0c889725828
--- /dev/null
+++ b/lib/private/files/objectstore/homeobjectstorestorage.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * @author Jörn Friedrich Dreyer
+ * @copyright (c) 2014 Jörn Friedrich Dreyer <jfd@owncloud.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\Files\ObjectStore;
+
+class HomeObjectStoreStorage extends ObjectStoreStorage {
+
+	public function __construct($params) {
+		parent::__construct($params);
+
+		//initialize cache with root directory in cache
+		if ( ! $this->is_dir('files') ) {
+			$this->mkdir('files');
+		}
+	}
+
+}
\ No newline at end of file
diff --git a/lib/private/files/objectstore/abstractobjectstore.php b/lib/private/files/objectstore/objectstorestorage.php
index de82003f0e8..6b48e2d78dd 100644
--- a/lib/private/files/objectstore/abstractobjectstore.php
+++ b/lib/private/files/objectstore/objectstorestorage.php
@@ -20,32 +20,14 @@
 
 namespace OC\Files\ObjectStore;
 
-abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
+use OCP\Files\ObjectStore\IObjectStore;
 
-	/**
-	 * @param string $urn the unified resource name used to identify the object
-	 * @param string $tmpFile path to the local temporary file that the object
-	 *        should be loaded from
-	 * @return void
-	 * @throws Exception when something goes wrong, message will be logged
-	 */
-	abstract protected function createObject($urn, $tmpFile = null);
+class ObjectStoreStorage extends \OC\Files\Storage\Common {
 
 	/**
-	 * @param string $urn the unified resource name used to identify the object
-	 * @param string $tmpFile path to the local temporary file that should be
-	 *        used to store the object
-	 * @return void
-	 * @throws Exception when something goes wrong, message will be logged
+	 * @var \OCP\Files\ObjectStore\IObjectStore $objectStore
 	 */
-	abstract protected function getObject($urn, $tmpFile);
-
-	/**
-	 * @param string $urn the unified resource name used to identify the object
-	 * @return void
-	 * @throws Exception when something goes wrong, message will be logged
-	 */
-	abstract protected function deleteObject($urn);
+	protected $objectStore;
 
 	/**
 	 * @var \OC\User\User $user
@@ -58,11 +40,16 @@ abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
 	private static $tmpFiles = array();
 
 	public function __construct($params) {
-		if (isset($params['user']) && is_object($params['user'])) {
+		if (isset($params['user']) && $params['user'] instanceof \OC\User\User) {
 			$this->user = $params['user'];
 		} else {
 			$this->user = null;
 		}
+		if (isset($params['objectstore']) && $params['objectstore'] instanceof IObjectStore) {
+			$this->objectStore = $params['objectstore'];
+		} else {
+			throw new \Exception('missing IObjectStore instance');
+		}
 		//initialize cache with root directory in cache
 		if ( ! $this->is_dir('/') ) {
 			$this->mkdir('/');
@@ -243,7 +230,7 @@ abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
 				return $this->rmdir($path);
 			}
 			try {
-				$this->deleteObject($this->getURN($stat['fileid']));
+				$this->objectStore->deleteObject($this->getURN($stat['fileid']));
 			} catch (\Exception $ex) {
 				if ($ex->getCode() !== 404) {
 					\OCP\Util::writeLog('objectstore', 'Could not delete object: '.$ex->getMessage(), \OCP\Util::ERROR);
@@ -269,7 +256,7 @@ abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
 					$tmpFile = \OC_Helper::tmpFile();
 					self::$tmpFiles[$tmpFile] = $path;
 					try {
-						$this->getObject($this->getURN($stat['fileid']), $tmpFile);
+						$this->objectStore->getObject($this->getURN($stat['fileid']), $tmpFile);
 					} catch (\Exception $ex) {
 						\OCP\Util::writeLog('objectstore', 'Could not get object: '.$ex->getMessage(), \OCP\Util::ERROR);
 						return false;
@@ -376,7 +363,7 @@ abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
 			);
 			$fileId = $this->getCache()->put($path, $stat);
 			try {
-				$this->createObject($this->getURN($fileId));
+				$this->objectStore->updateObject($this->getURN($fileId));
 			} catch (\Exception $ex) {
 				$this->getCache()->remove($path);
 				\OCP\Util::writeLog('objectstore', 'Could not create object: '.$ex->getMessage(), \OCP\Util::ERROR);
@@ -424,7 +411,7 @@ abstract class AbstractObjectStore extends \OC\Files\Storage\Common {
 		$fileId = $this->getCache()->put($path, $stat);
 		try {
 			//upload to object storage
-			$this->createObject($this->getURN($fileId), $tmpFile);
+			$this->objectStore->updateObject($this->getURN($fileId), $tmpFile);
 		} catch (\Exception $ex) {
 			$this->getCache()->remove($path);
 			\OCP\Util::writeLog('objectstore', 'Could not create object: '.$ex->getMessage(), \OCP\Util::ERROR);
diff --git a/lib/private/files/objectstore/swift.php b/lib/private/files/objectstore/swift.php
index 53367367af0..f66b03889d2 100644
--- a/lib/private/files/objectstore/swift.php
+++ b/lib/private/files/objectstore/swift.php
@@ -23,7 +23,7 @@ namespace OC\Files\ObjectStore;
 use Guzzle\Http\Exception\ClientErrorResponseException;
 use OpenCloud\OpenStack;
 
-class Swift extends AbstractObjectStore {
+class Swift implements \OCP\Files\ObjectStore\IObjectStore {
 
 	/**
 	 * @var \OpenCloud\ObjectStore\Service
@@ -78,19 +78,22 @@ class Swift extends AbstractObjectStore {
 				throw $ex;
 			}
 		}
-
-		//set the user via parent constructor, also initializes the root of the filecache
-		parent::__construct($params);
 	}
 
+
 	/**
 	 * @param string $urn Unified Resource Name
+	 * @param string $tmpFile
 	 * @return void
 	 * @throws Exception from openstack lib when something goes wrong
 	 */
-	protected function deleteObject($urn) {
-		$object = $this->container->getObject($urn);
-		$object->delete();
+	public function updateObject($urn, $tmpFile = null) {
+		$fileData = '';
+		if ($tmpFile) {
+			$fileData = fopen($tmpFile, 'r');
+		}
+
+		$this->container->uploadObject($urn, $fileData);
 	}
 
 	/**
@@ -99,7 +102,7 @@ class Swift extends AbstractObjectStore {
 	 * @return void
 	 * @throws Exception from openstack lib when something goes wrong
 	 */
-	protected function getObject($urn, $tmpFile) {
+	public function getObject($urn, $tmpFile) {
 		$object = $this->container->getObject($urn);
 
 		/** @var $objectContent \Guzzle\Http\EntityBody **/
@@ -112,17 +115,12 @@ class Swift extends AbstractObjectStore {
 
 	/**
 	 * @param string $urn Unified Resource Name
-	 * @param string $tmpFile
 	 * @return void
 	 * @throws Exception from openstack lib when something goes wrong
 	 */
-	protected function createObject($urn, $tmpFile = null) {
-		$fileData = '';
-		if ($tmpFile) {
-			$fileData = fopen($tmpFile, 'r');
-		}
-
-		$this->container->uploadObject($urn, $fileData);
+	public function deleteObject($urn) {
+		$object = $this->container->getObject($urn);
+		$object->delete();
 	}
 
 	public function deleteContainer($recursive = false) {
diff --git a/lib/private/util.php b/lib/private/util.php
index f2ecdcbded6..d384eda5f7f 100755
--- a/lib/private/util.php
+++ b/lib/private/util.php
@@ -32,11 +32,17 @@ class OC_Util {
 	private static function initObjectStoreRootFS($config) {
 		// check misconfiguration
 		if (empty($config['class'])) {
-			//FIXME log error?
+			\OCP\Util::writeLog('files', 'No class given for objectstore', \OCP\Util::ERROR);
 		}
 		if (!isset($config['arguments'])) {
 			$config['arguments'] = array();
 		}
+
+		// instantiate object store implementation
+		$config['arguments']['objectstore'] = new $config['class']($config['arguments']);
+		// mount with plain / root object store implementation
+		$config['class'] = '\OC\Files\ObjectStore\ObjectStoreStorage';
+
 		// mount object storage as root
 		\OC\Files\Filesystem::initMounts();
 		if(!self::$rootMounted) {
@@ -94,7 +100,7 @@ class OC_Util {
 				 * @var \OC\Files\Storage\Storage $storage
 				 */
 				if ($storage->instanceOfStorage('\OC\Files\Storage\Home')
-					|| $storage->instanceOfStorage('\OC\Files\ObjectStore\AbstractObjectStore')
+					|| $storage->instanceOfStorage('\OC\Files\ObjectStore\HomeObjectStoreStorage')
 				) {
 					if (is_object($storage->getUser())) {
 						$user = $storage->getUser()->getUID();
diff --git a/lib/public/files/objectstore/iobjectstore.php b/lib/public/files/objectstore/iobjectstore.php
new file mode 100644
index 00000000000..ecc35faf34a
--- /dev/null
+++ b/lib/public/files/objectstore/iobjectstore.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace OCP\Files\ObjectStore;
+
+interface IObjectStore {
+
+	/**
+	 * @param string $urn the unified resource name used to identify the object
+	 * @param string $tmpFile path to the local temporary file that should be
+	 *        used to store the object
+	 * @return void
+	 * @throws Exception when something goes wrong, message will be logged
+	 */
+	function getObject($urn, $tmpFile);
+	/**
+	 * @param string $urn the unified resource name used to identify the object
+	 * @param string $tmpFile path to the local temporary file that the object
+	 *        should be loaded from
+	 * @return void
+	 * @throws Exception when something goes wrong, message will be logged
+	 */
+	function updateObject($urn, $tmpFile = null);
+
+
+	/**
+	 * @param string $urn the unified resource name used to identify the object
+	 * @return void
+	 * @throws Exception when something goes wrong, message will be logged
+	 */
+	 function deleteObject($urn);
+
+}
\ No newline at end of file
diff --git a/tests/lib/files/objectstore/swift.php b/tests/lib/files/objectstore/swift.php
index 497ea7f241c..d05af4d6587 100644
--- a/tests/lib/files/objectstore/swift.php
+++ b/tests/lib/files/objectstore/swift.php
@@ -20,6 +20,7 @@
 
 namespace OCA\ObjectStore\Tests\Unit;
 
+use OC\Files\ObjectStore\ObjectStoreStorage;
 use OC\Files\ObjectStore\Swift as ObjectStoreToTest;
 
 use PHPUnit_Framework_TestCase;
@@ -30,6 +31,8 @@ class Swift extends PHPUnit_Framework_TestCase {
 	 * @var \OC\Files\ObjectStore\Swift $storage
 	 */
 	private $storage;
+
+	private $objectStorage;
 	
 	public function setUp() {
 		
@@ -67,14 +70,16 @@ class Swift extends PHPUnit_Framework_TestCase {
 			'serviceName' => 'swift', //trystack uses swift by default, the lib defaults to 'cloudFiles' if omitted
 			'user' => \OC_User::getManager()->get($userName)
 		);
-		$this->storage = new ObjectStoreToTest($params);
+		$this->objectStorage = new ObjectStoreToTest($params);
+		$params['objectstore'] = $this->objectStorage;
+		$this->storage = new ObjectStoreStorage($params);
 	}
 
 	public function tearDown() {
 		if (is_null($this->storage)) {
 			return;
 		}
-		$this->storage->deleteContainer(true);
+		$this->objectStorage->deleteContainer(true);
 		$this->storage->getCache()->clear();
 		//TODO how do I clear hooks?
 	}