1 //
2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.websocket.common;
20
21 /**
22 * Connection states as outlined in <a href="https://tools.ietf.org/html/rfc6455">RFC6455</a>.
23 */
24 public enum ConnectionState
25 {
26 /** [RFC] Initial state of a connection, the upgrade request / response is in progress */
27 CONNECTING,
28 /**
29 * [Impl] Intermediate state between CONNECTING and OPEN, used to indicate that a upgrade request/response is successful, but the end-user provided socket's
30 * onOpen code has yet to run.
31 * <p>
32 * This state is to allow the local socket to initiate messages and frames, but to NOT start reading yet.
33 */
34 CONNECTED,
35 /**
36 * [RFC] The websocket connection is established and open.
37 * <p>
38 * This indicates that the Upgrade has succeed, and the end-user provided socket's onOpen code has completed.
39 * <p>
40 * It is now time to start reading from the remote endpoint.
41 */
42 OPEN,
43 /**
44 * [RFC] The websocket closing handshake is started.
45 * <p>
46 * This can be considered a half-closed state.
47 * <p>
48 * When receiving this as an event on {@link ConnectionStateListener#onConnectionStateChange(ConnectionState)} a close frame should be sent using
49 * the {@link CloseInfo} available from {@link IOState#getCloseInfo()}
50 */
51 CLOSING,
52 /**
53 * [RFC] The websocket connection is closed.
54 * <p>
55 * Connection should be disconnected and no further reads or writes should occur.
56 */
57 CLOSED;
58 }