Introduce background repair steps

3 files changed, 136 insertions, 0 deletions

diff --git a/lib/private/App/InfoParser.php b/lib/private/App/InfoParser.php
index e763364e148..b7540c04248 100644
--- a/lib/private/App/InfoParser.php
+++ b/lib/private/App/InfoParser.php
@@ -80,6 +80,9 @@ class InfoParser {
 		if (!array_key_exists('post-migration', $array['repair-steps'])) {
 			$array['repair-steps']['post-migration'] = [];
 		}
+		if (!array_key_exists('live-migration', $array['repair-steps'])) {
+			$array['repair-steps']['live-migration'] = [];
+		}
 
 		if (array_key_exists('documentation', $array) && is_array($array['documentation'])) {
 			foreach ($array['documentation'] as $key => $url) {
@@ -110,6 +113,9 @@ class InfoParser {
 		if (isset($array['repair-steps']['post-migration']['step']) && is_array($array['repair-steps']['post-migration']['step'])) {
 			$array['repair-steps']['post-migration'] = $array['repair-steps']['post-migration']['step'];
 		}
+		if (isset($array['repair-steps']['live-migration']['step']) && is_array($array['repair-steps']['live-migration']['step'])) {
+			$array['repair-steps']['live-migration'] = $array['repair-steps']['live-migration']['step'];
+		}
 		return $array;
 	}
 
diff --git a/lib/private/Migration/BackgroundRepair.php b/lib/private/Migration/BackgroundRepair.php
new file mode 100644
index 00000000000..d85c8550d5d
--- /dev/null
+++ b/lib/private/Migration/BackgroundRepair.php
@@ -0,0 +1,116 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace OC\Migration;
+
+use OC\BackgroundJob\JobList;
+use OC\BackgroundJob\TimedJob;
+use OC\NeedsUpdateException;
+use OC\Repair;
+use OC_App;
+use OCP\BackgroundJob\IJobList;
+use OCP\ILogger;
+use Symfony\Component\EventDispatcher\EventDispatcher;
+
+/**
+ * Class BackgroundRepair
+ *
+ * @package OC\Migration
+ */
+class BackgroundRepair extends TimedJob {
+
+	/** @var IJobList */
+	private $jobList;
+
+	/** @var ILogger */
+	private $logger;
+
+	/** @var EventDispatcher */
+	private $dispatcher;
+
+	public function setDispatcher(EventDispatcher $dispatcher) {
+		$this->dispatcher = $dispatcher;
+	}
+	/**
+	 * run the job, then remove it from the job list
+	 *
+	 * @param JobList $jobList
+	 * @param ILogger $logger
+	 */
+	public function execute($jobList, ILogger $logger = null) {
+		// add an interval of 15 mins
+		$this->setInterval(15*60);
+
+		$this->jobList = $jobList;
+		$this->logger = $logger;
+		parent::execute($jobList, $logger);
+	}
+
+	/**
+	 * @param array $argument
+	 * @throws \Exception
+	 * @throws \OC\NeedsUpdateException
+	 */
+	protected function run($argument) {
+		if (!isset($argument['app']) || !isset($argument['step'])) {
+			// remove the job - we can never execute it
+			$this->jobList->remove($this, $this->argument);
+			return;
+		}
+		$app = $argument['app'];
+
+		try {
+			$this->loadApp($app);
+		} catch (NeedsUpdateException $ex) {
+			// as long as the app is not yet done with it's offline migration
+			// we better not start with the live migration
+			return;
+		}
+
+		$step = $argument['step'];
+		$repair = new Repair([], $this->dispatcher);
+		try {
+			$repair->addStep($step);
+		} catch (\Exception $ex) {
+			$this->logger->logException($ex,[
+				'app' => 'migration'
+			]);
+
+			// remove the job - we can never execute it
+			$this->jobList->remove($this, $this->argument);
+			return;
+		}
+
+		// execute the repair step
+		$repair->run();
+
+		// remove the job once executed successfully
+		$this->jobList->remove($this, $this->argument);
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 * @param $app
+	 * @throws NeedsUpdateException
+	 */
+	protected function loadApp($app) {
+		OC_App::loadApp($app);
+	}
+}
diff --git a/lib/private/app.php b/lib/private/app.php
index 7bcbef32531..246bf97ee91 100644
--- a/lib/private/app.php
+++ b/lib/private/app.php
@@ -1153,6 +1153,7 @@ class OC_App {
 			OC_DB::updateDbFromStructure($appPath . '/appinfo/database.xml');
 		}
 		self::executeRepairSteps($appId, $appData['repair-steps']['post-migration']);
+		self::setupLiveMigrations($appId, $appData['repair-steps']['live-migration']);
 		unset(self::$appVersion[$appId]);
 		// run upgrade code
 		if (file_exists($appPath . '/appinfo/update.php')) {
@@ -1211,6 +1212,19 @@ class OC_App {
 
 	/**
 	 * @param string $appId
+	 * @param string[] $steps
+	 */
+	private static function setupLiveMigrations($appId, array $steps) {
+		$queue = \OC::$server->getJobList();
+		foreach ($steps as $step) {
+			$queue->add('OC\Migration\BackgroundRepair', [
+				'app' => $appId,
+				'step' => $step]);
+		}
+	}
+
+	/**
+	 * @param string $appId
 	 * @return \OC\Files\View|false
 	 */
 	public static function getStorage($appId) {