1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.proxy;
21
22 import org.apache.mina.core.buffer.IoBuffer;
23 import org.apache.mina.core.filterchain.IoFilter.NextFilter;
24 import org.apache.mina.core.write.WriteRequest;
25 import org.apache.mina.proxy.session.ProxyIoSession;
26
27 /**
28 * ProxyLogicHandler.java - Interface implemented by classes containing proxy type specific logic.
29 *
30 * @author The Apache MINA Project (dev@mina.apache.org)
31 * @since MINA 2.0.0-M3
32 */
33 public interface ProxyLogicHandler {
34 /**
35 * Tests if handshake process is complete.
36 *
37 * @return <code>true</code> if handshaking is complete and
38 * data can be sent through the proxy, false otherwise.
39 */
40 public abstract boolean isHandshakeComplete();
41
42 /**
43 * Handle incoming data during the handshake process. Should consume only the
44 * handshake data from the buffer, leaving any extra data in place.
45 *
46 * @param nextFilter the next filter in the filter chain
47 * @param buf the buffer holding the received data
48 * @throws ProxyAuthException if authentication fails
49 */
50 public abstract void messageReceived(NextFilter nextFilter, IoBuffer buf)
51 throws ProxyAuthException;
52
53 /**
54 * Called at each step of the handshake procedure.
55 *
56 * @param nextFilter the next filter in filter chain
57 * @throws ProxyAuthException if authentication fails
58 */
59 public abstract void doHandshake(NextFilter nextFilter)
60 throws ProxyAuthException;
61
62 /**
63 * Returns the {@link ProxyIoSession}.
64 *
65 * @return the proxy session object
66 */
67 public abstract ProxyIoSession getProxyIoSession();
68
69 /**
70 * Enqueue a message to be written once handshaking is complete.
71 *
72 * @param nextFilter the next filter in filter chain
73 * @param writeRequest the data to be written
74 */
75 public abstract void enqueueWriteRequest(final NextFilter nextFilter,
76 final WriteRequest writeRequest);
77 }