--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/viewer_swing/java/com/glavsoft/viewer/ConnectionWorker.java	Sun Dec 15 18:04:03 2013 +0900
@@ -0,0 +1,47 @@
+// Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC.
+// All rights reserved.
+//
+//-------------------------------------------------------------------------
+// This file is part of the TightVNC software.  Please visit our Web site:
+//
+//                       http://www.tightvnc.com/
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, write to the Free Software Foundation, Inc.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//-------------------------------------------------------------------------
+//
+
+package com.glavsoft.viewer;
+
+/**
+ * @author dime at tightvnc.com
+ */
+public interface ConnectionWorker<T> {
+    /**
+     * The same as in {@link javax.swing.SwingWorker}
+     */
+    T doInBackground() throws Exception;
+
+    /**
+     * The same as in {@link javax.swing.SwingWorker}
+     */
+    void execute();
+
+    /**
+     * Should cancel worker.
+     *
+     * @return true if cancelled successful, false if not (ex. worker is already cancelled)
+     */
+    boolean cancel();
+}