Sqlite: Add session support

Session are captured by hooking in the sqlite changes. They are saved in blobs and containing inserts, update and deletes. Because the are semantically coupled to translactions we add a Change-Id: Ie095558ebc50601fcaae32958ebeeb98b72d73b9 Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
2020-05-27 23:48:03 +02:00
parent d6b1281a65
commit a61eff0079
29 changed files with 1253 additions and 48 deletions
--- a/src/libs/sqlite/sqlitesessions.h
+++ b/src/libs/sqlite/sqlitesessions.h
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "sqlitedatabase.h"
+#include "sqlitewritestatement.h"
+
+extern "C" {
+typedef struct sqlite3_session sqlite3_session;
+void sqlite3session_delete(sqlite3_session *pSession);
+};
+
+namespace Sqlite {
+
+namespace Internal {
+
+class SQLITE_EXPORT SessionsBase
+{
+public:
+    SessionsBase(Database &database, Utils::SmallStringView sessionsTableName)
+        : sessionsTableName(sessionsTableName)
+    {
+        createSessionTable(database);
+    }
+
+    void createSessionTable(Database &database);
+
+public:
+    Utils::SmallString sessionsTableName;
+};
+} // namespace Internal
+
+class SQLITE_EXPORT Sessions : public Internal::SessionsBase
+{
+public:
+    Sessions(Database &database,
+             Utils::SmallStringView databaseName,
+             Utils::SmallStringView sessionsTableName)
+        : SessionsBase(database, sessionsTableName)
+        , database(database)
+        , insertSession{Utils::PathString{"INSERT INTO ",
+                                          sessionsTableName,
+                                          "(changeset) VALUES(?)"},
+                        database}
+        , databaseName(databaseName)
+        , session{nullptr, sqlite3session_delete}
+    {}
+    ~Sessions();
+
+    void setAttachedTables(Utils::SmallStringVector tables);
+
+    void create();
+    void commit();
+    void rollback();
+
+    void revert();
+    void apply();
+    void applyAndUpdateSessions();
+    void deleteAll();
+
+private:
+    void attachTables(const Utils::SmallStringVector &tables);
+
+public:
+    Database &database;
+    WriteStatement insertSession;
+    Utils::SmallString databaseName;
+    Utils::SmallStringVector tableNames;
+    std::unique_ptr<sqlite3_session, decltype(&sqlite3session_delete)> session;
+};
+
+} // namespace Sqlite