Add LockManager and Backend to Framework functionalities

Author: paveq

app/etc/di.xml

@@ -37,6 +37,7 @@
     <preference for="Magento\Framework\Locale\ListsInterface" type="Magento\Framework\Locale\TranslatedLists" />
     <preference for="Magento\Framework\Locale\AvailableLocalesInterface" type="Magento\Framework\Locale\Deployed\Codes" />
     <preference for="Magento\Framework\Locale\OptionInterface" type="Magento\Framework\Locale\Deployed\Options" />
+    <preference for="Magento\Framework\Lock\LockManagerInterface" type="Magento\Framework\Lock\Backend\Database" />
     <preference for="Magento\Framework\Api\AttributeTypeResolverInterface" type="Magento\Framework\Reflection\AttributeTypeResolver" />
     <preference for="Magento\Framework\Api\Search\SearchResultInterface" type="Magento\Framework\Api\Search\SearchResult" />
     <preference for="Magento\Framework\Api\Search\SearchCriteriaInterface" type="Magento\Framework\Api\Search\SearchCriteria"/>

lib/internal/Magento/Framework/Lock/Backend/Database.php

@@ -0,0 +1,54 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Framework\lock\Backend;
+
+class Database implements \Magento\Framework\Lock\LockManagerInterface
+{
+    /** @var \Magento\Framework\DB\Adapter\AdapterInterface */
+    private $adapter;
+
+    public function __construct(
+        \Magento\Framework\DB\Adapter\AdapterInterface $adapter
+    )
+    {
+        $this->adapter = $adapter;
+    }
+
+    /**
+     * Sets a lock for name
+     *
+     * @param string $name lock name
+     * @return bool
+     */
+    public function setLock($name, $timeout = -1)
+    {
+        return (bool) $this->adapter->query("SELECT GET_LOCK(?, ?);", array((string)$name, (int)$timeout))
+            ->fetchColumn();
+    }
+
+    /**
+     * Releases a lock for name
+     *
+     * @param string $name lock name
+     * @return bool
+     */
+    public function releaseLock($name)
+    {
+        return (bool) $this->adapter->query("SELECT RELEASE_LOCK(?);", array((string)$name))->fetchColumn();
+    }
+
+    /**
+     * Tests of lock is set for name
+     *
+     * @param string $name lock name
+     * @return bool
+     */
+    public function isLocked($name)
+    {
+        return (bool) $this->adapter->query("SELECT IS_USED_LOCK(?);", array((string)$name))->fetchColumn();
+    }
+}

lib/internal/Magento/Framework/Lock/LockManagerInterface.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Framework\Lock;
+
+/**
+ * Interface of a lock manager
+ *
+ * @api
+ */
+interface LockManagerInterface
+{
+    /**
+     * Sets a lock for name
+     *
+     * @param string $name lock name
+     * @param int $timeout Timeout in seconds, negative value means infinite timeout
+     * @return bool
+     */
+    public function setLock($name, $timeout = -1);
+
+    /**
+     * Releases a lock for name
+     *
+     * @param string $name lock name
+     * @return bool
+     * @api
+     */
+    public function releaseLock($name);
+
+    /**
+     * Tests of lock is set for name
+     *
+     * @param string $name lock name
+     * @return bool
+     * @api
+     */
+    public function isLocked($name);
+}