Adding example of websocket streaming read/write

jetty-websocket/javax-websocket-server-impl/src/test/java/examples/StreamingEchoSocket.java

@@ -0,0 +1,46 @@
+//
+//  ========================================================================
+//  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 examples;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.Writer;
+
+import javax.websocket.OnMessage;
+import javax.websocket.Session;
+import javax.websocket.server.ServerEndpoint;
+
+import org.eclipse.jetty.toolchain.test.IO;
+
+@ServerEndpoint("/echo")
+public class StreamingEchoSocket
+{
+    @OnMessage
+    public void onMessage(Session session, Reader reader)
+    {
+        try (Writer writer = session.getBasicRemote().getSendWriter())
+        {
+            IO.copy(reader,writer);
+        }
+        catch (IOException e)
+        {
+            e.printStackTrace();
+        }
+    }
+}