--- /dev/null
+//
+// ========================================================================
+// Copyright (c) 1995-2014 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.io;
+
+import java.net.Socket;
+import java.nio.ByteBuffer;
+
+/**
+ * <p>A listener for raw network traffic within Jetty.</p>
+ * <p>{@link NetworkTrafficListener}s can be installed in a
+ * <code>org.eclipse.jetty.server.nio.NetworkTrafficSelectChannelConnector</code>,
+ * and are notified of the following network traffic events:</p>
+ * <ul>
+ * <li>Connection opened, when the server has accepted the connection from a remote client</li>
+ * <li>Incoming bytes, when the server receives bytes sent from a remote client</li>
+ * <li>Outgoing bytes, when the server sends bytes to a remote client</li>
+ * <li>Connection closed, when the server has closed the connection to a remote client</li>
+ * </ul>
+ * <p>{@link NetworkTrafficListener}s can be used to log the network traffic viewed by
+ * a Jetty server (for example logging to filesystem) for activities such as debugging
+ * or request/response cycles or for replaying request/response cycles to other servers.</p>
+ */
+public interface NetworkTrafficListener
+{
+ /**
+ * <p>Callback method invoked when a connection from a remote client has been accepted.</p>
+ * <p>The {@code socket} parameter can be used to extract socket address information of
+ * the remote client.</p>
+ *
+ * @param socket the socket associated with the remote client
+ */
+ public void opened(Socket socket);
+
+ /**
+ * <p>Callback method invoked when bytes sent by a remote client arrived on the server.</p>
+ *
+ * @param socket the socket associated with the remote client
+ * @param bytes the read-only buffer containing the incoming bytes
+ */
+ public void incoming(Socket socket, ByteBuffer bytes);
+
+ /**
+ * <p>Callback method invoked when bytes are sent to a remote client from the server.</p>
+ * <p>This method is invoked after the bytes have been actually written to the remote client.</p>
+ *
+ * @param socket the socket associated with the remote client
+ * @param bytes the read-only buffer containing the outgoing bytes
+ */
+ public void outgoing(Socket socket, ByteBuffer bytes);
+
+ /**
+ * <p>Callback method invoked when a connection to a remote client has been closed.</p>
+ * <p>The {@code socket} parameter is already closed when this method is called, so it
+ * cannot be queried for socket address information of the remote client.<br />
+ * However, the {@code socket} parameter is the same object passed to {@link #opened(Socket)},
+ * so it is possible to map socket information in {@link #opened(Socket)} and retrieve it
+ * in this method.
+ *
+ * @param socket the (closed) socket associated with the remote client
+ */
+ public void closed(Socket socket);
+
+ /**
+ * <p>A commodity class that implements {@link NetworkTrafficListener} with empty methods.</p>
+ */
+ public static class Adapter implements NetworkTrafficListener
+ {
+ public void opened(Socket socket)
+ {
+ }
+
+ public void incoming(Socket socket, ByteBuffer bytes)
+ {
+ }
+
+ public void outgoing(Socket socket, ByteBuffer bytes)
+ {
+ }
+
+ public void closed(Socket socket)
+ {
+ }
+ }
+}