Adding smaller example of the WebSocketCreator use

jetty-websocket/websocket-server/src/test/java/org/eclipse/jetty/websocket/server/examples/MyCustomCreationServlet.java

@@ -0,0 +1,79 @@
+//
+//  ========================================================================
+//  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
+//  ------------------------------------------------------------------------
+//  All rights reserved. This program and the accompanying materials
+//  are made available under the terms of the Eclipse Public License v1.0
+//  and Apache License v2.0 which accompanies this distribution.
+//
+//      The Eclipse Public License is available at
+//      http://www.eclipse.org/legal/epl-v10.html
+//
+//      The Apache License v2.0 is available at
+//      http://www.opensource.org/licenses/apache2.0.php
+//
+//  You may elect to redistribute this code under either of these licenses.
+//  ========================================================================
+//
+
+package org.eclipse.jetty.websocket.server.examples;
+
+import java.io.IOException;
+
+import org.eclipse.jetty.websocket.api.UpgradeRequest;
+import org.eclipse.jetty.websocket.api.UpgradeResponse;
+import org.eclipse.jetty.websocket.server.examples.echo.BigEchoSocket;
+import org.eclipse.jetty.websocket.servlet.WebSocketCreator;
+import org.eclipse.jetty.websocket.servlet.WebSocketServlet;
+import org.eclipse.jetty.websocket.servlet.WebSocketServletFactory;
+
+@SuppressWarnings("serial")
+public class MyCustomCreationServlet extends WebSocketServlet
+{
+    public static class MyCustomCreator implements WebSocketCreator
+    {
+        @Override
+        public Object createWebSocket(UpgradeRequest req, UpgradeResponse resp)
+        {
+            String query = req.getQueryString();
+
+            // Start looking at the UpgradeRequest to determine what you want to do
+            if ((query == null) || (query.length() <= 0))
+            {
+                try
+                {
+                    // Let UPGRADE request for websocket fail with
+                    // status code 403 (FORBIDDEN) [per RFC-6455]
+                    resp.sendForbidden("Unspecified query");
+                }
+                catch (IOException e)
+                {
+                    // An input or output exception occurs
+                    e.printStackTrace();
+                }
+
+                // No UPGRADE
+                return null;
+            }
+
+            // Create the websocket we want to
+            if (query.contains("bigecho"))
+            {
+                return new BigEchoSocket();
+            }
+            else if (query.contains("echo"))
+            {
+                return new MyEchoSocket();
+            }
+
+            // Let UPGRADE fail with 503 (UNAVAILABLE)
+            return null;
+        }
+    }
+
+    @Override
+    public void configure(WebSocketServletFactory factory)
+    {
+        factory.setCreator(new MyCustomCreator());
+    }
+}