diff -r a07253cf2ca4 -r d382dacfd73f rt/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/Launcher.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/launcher/src/main/java/org/apidesign/bck2brwsr/launcher/Launcher.java	Tue Feb 26 16:54:16 2013 +0100
@@ -0,0 +1,115 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * 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, version 2 of the License.
+ *
+ * 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. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.launcher;
+
+import java.io.Closeable;
+import java.io.File;
+import java.io.IOException;
+import java.net.URLClassLoader;
+import org.apidesign.vm4brwsr.Bck2Brwsr;
+
+/** An abstraction for executing tests in a Bck2Brwsr virtual machine.
+ * Either in {@linkm Launcher#createJavaScript JavaScript engine}, 
+ * or in {@linkm Launcher#createBrowser external browser}.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public abstract class Launcher {
+
+    Launcher() {
+    }
+
+    /** Initializes the launcher. This may mean starting a web browser or
+     * initializing execution engine.
+     * @throws IOException if something goes wrong
+     */
+    public abstract void initialize() throws IOException;
+    
+    /** Shuts down the launcher.
+     * @throws IOException if something goes wrong
+     */
+    public abstract void shutdown() throws IOException;
+    
+    
+    /** Builds an invocation context. The context can later be customized
+     * and {@link InvocationContext#invoke() invoked}.
+     * 
+     * @param clazz the class to execute method from
+     * @param method the method to execute
+     * @return the context pointing to the selected method
+     */
+    public InvocationContext createInvocation(Class<?> clazz, String method) {
+        return new InvocationContext(this, clazz, method);
+    }
+    
+
+    /** Creates launcher that uses internal JavaScript engine (Rhino).
+     * @return the launcher
+     */
+    public static Launcher createJavaScript() {
+        final JSLauncher l = new JSLauncher();
+        l.addClassLoader(Bck2Brwsr.class.getClassLoader());
+        return l;
+    }
+    
+    /** Creates launcher that is using external browser.
+     * 
+     * @param cmd <code>null</code> to use <code>java.awt.Desktop</code> to show the launcher
+     *    or a string to execute in an external process (with a parameter to the URL)
+     * @return launcher executing in external browser.
+     */
+    public static Launcher createBrowser(String cmd) {
+        final Bck2BrwsrLauncher l = new Bck2BrwsrLauncher(cmd);
+        l.addClassLoader(Bck2Brwsr.class.getClassLoader());
+        l.setTimeout(180000);
+        return l;
+    }
+    
+    /** Starts an HTTP server which provides access to classes and resources
+     * available in the <code>classes</code> URL and shows a start page
+     * available as {@link ClassLoader#getResource(java.lang.String)} from the
+     * provide classloader. Opens a browser with URL showing the start page.
+     * 
+     * @param classes classloader offering access to classes and resources
+     * @param startpage page to show in the browser
+     * @return interface that allows one to stop the server
+     * @throws IOException if something goes wrong
+     */
+    public static Closeable showURL(URLClassLoader classes, String startpage) throws IOException {
+        Bck2BrwsrLauncher l = new Bck2BrwsrLauncher(null);
+        l.addClassLoader(classes);
+        l.showURL(startpage);
+        return l;
+    }
+    /** Starts an HTTP server which provides access to certain directory.
+     * The <code>startpage</code> should be relative location inside the root 
+     * driecotry
+     * Opens a browser with URL showing the start page.
+     * 
+     * @param directory the root directory on disk
+     * @praam startpage relative path from the root to the page
+     * @exception IOException if something goes wrong.
+     */
+    public static Closeable showDir(File directory, String startpage) throws IOException {
+        Bck2BrwsrLauncher l = new Bck2BrwsrLauncher(null);
+        l.showDirectory(directory, startpage);
+        return l;
+    }
+
+    abstract InvocationContext runMethod(InvocationContext c) throws IOException; 
+}