--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db;\r
+\r
+\r
+/**\r
+ * A single session with a database.\r
+ * Should be replaced with RequestProcessor\r
+ *\r
+ * A session is created for a particular database revision and also for a\r
+ * particular time.\r
+ *\r
+ * @author Tuukka Lehtonen\r
+ * @see SessionManager\r
+ * @see Session\r
+ */\r
+public interface Session extends RequestProcessor { \r
+ /**\r
+ * Marks the current database state or the beginning of the current ongoing\r
+ * write transaction as an undo point. Calling this method several times\r
+ * before or during the same write transaction has no effect.\r
+ */\r
+ void markUndoPoint();\r
+}\r