|
|||||||||||||||||||
30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
OnePortAsynchChannelServer.java | 62.5% | 73.6% | 66.7% | 70.1% |
|
1 |
/**
|
|
2 |
*
|
|
3 |
* Copyright 2004 Hiram Chirino
|
|
4 |
*
|
|
5 |
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
6 |
* you may not use this file except in compliance with the License.
|
|
7 |
* You may obtain a copy of the License at
|
|
8 |
*
|
|
9 |
* http://www.apache.org/licenses/LICENSE-2.0
|
|
10 |
*
|
|
11 |
* Unless required by applicable law or agreed to in writing, software
|
|
12 |
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
13 |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
14 |
* See the License for the specific language governing permissions and
|
|
15 |
* limitations under the License.
|
|
16 |
*
|
|
17 |
**/
|
|
18 |
package org.activeio.oneport;
|
|
19 |
|
|
20 |
import java.io.IOException;
|
|
21 |
import java.net.URI;
|
|
22 |
import java.util.Iterator;
|
|
23 |
|
|
24 |
import org.activeio.AcceptListener;
|
|
25 |
import org.activeio.AsynchChannel;
|
|
26 |
import org.activeio.AsynchChannelListener;
|
|
27 |
import org.activeio.AsynchChannelServer;
|
|
28 |
import org.activeio.Channel;
|
|
29 |
import org.activeio.FilterAsynchChannel;
|
|
30 |
import org.activeio.FilterAsynchChannelServer;
|
|
31 |
import org.activeio.Packet;
|
|
32 |
import org.activeio.SynchChannel;
|
|
33 |
import org.activeio.adapter.AsynchToSynchChannelAdapter;
|
|
34 |
import org.activeio.adapter.SynchToAsynchChannelAdapter;
|
|
35 |
import org.activeio.filter.PushbackSynchChannel;
|
|
36 |
import org.activeio.packet.AppendedPacket;
|
|
37 |
|
|
38 |
import EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap;
|
|
39 |
|
|
40 |
/**
|
|
41 |
* Allows multiple protocols share a single ChannelServer. All protocols sharing the server
|
|
42 |
* must have a distinct magic number at the beging of the client's request.
|
|
43 |
*
|
|
44 |
* TODO: handle the case where a client opens a connection but sends no data down the stream. We need
|
|
45 |
* to timeout that client.
|
|
46 |
*
|
|
47 |
* @version $Revision$
|
|
48 |
*/
|
|
49 |
final public class OnePortAsynchChannelServer extends FilterAsynchChannelServer { |
|
50 |
|
|
51 |
/**
|
|
52 |
* The OnePortAsynchChannelServer listens for incoming connection
|
|
53 |
* from a normal AsynchChannelServer. This s the listner used
|
|
54 |
* to receive the accepted channels.
|
|
55 |
*/
|
|
56 |
final private class OnePortAcceptListener implements AcceptListener { |
|
57 |
|
|
58 | 24 |
public void onAccept(Channel channel) { |
59 | 24 |
try {
|
60 | 24 |
AsynchChannel asynchChannel = SynchToAsynchChannelAdapter.adapt(channel); |
61 | 24 |
ProtocolInspectingAsynchChannel inspector = new ProtocolInspectingAsynchChannel(asynchChannel);
|
62 | 24 |
inspector.start(); |
63 |
} catch (IOException e) {
|
|
64 | 0 |
onAcceptError(e); |
65 |
} |
|
66 |
} |
|
67 |
|
|
68 | 0 |
public void onAcceptError(IOException error) { |
69 | 0 |
dispose(); |
70 |
} |
|
71 |
} |
|
72 |
|
|
73 |
/**
|
|
74 |
* This channel filter sniffs the first few bytes of the byte stream
|
|
75 |
* to see if a ProtocolRecognizer recognizes the protocol. If it does not
|
|
76 |
* it just closes the channel, otherwise the associated SubPortAsynchChannelServer
|
|
77 |
* is notified that it accepted a channel.
|
|
78 |
*
|
|
79 |
*/
|
|
80 |
final private class ProtocolInspectingAsynchChannel extends FilterAsynchChannel { |
|
81 |
private Packet buffer;
|
|
82 |
|
|
83 | 24 |
public ProtocolInspectingAsynchChannel(AsynchChannel next) throws IOException { |
84 | 24 |
super(next);
|
85 | 24 |
setAsynchChannelListener(new AsynchChannelListener() {
|
86 | 30 |
public void onPacket(Packet packet) { |
87 | 30 |
if (buffer == null) { |
88 | 24 |
buffer = packet; |
89 |
} else {
|
|
90 | 6 |
buffer = AppendedPacket.join(buffer, packet); |
91 |
} |
|
92 | 30 |
findMagicNumber(); |
93 |
} |
|
94 |
|
|
95 | 0 |
public void onPacketError(IOException error) { |
96 | 0 |
dispose(); |
97 |
} |
|
98 |
}); |
|
99 |
} |
|
100 |
|
|
101 | 30 |
private void findMagicNumber() { |
102 | 30 |
for (Iterator iter = recognizerMap.keySet().iterator(); iter.hasNext();) {
|
103 | 32 |
ProtocolRecognizer recognizer = (ProtocolRecognizer) iter.next(); |
104 | 32 |
if (recognizer.recognizes(buffer.duplicate())) {
|
105 |
|
|
106 | 12 |
if( UnknownRecognizer.UNKNOWN_RECOGNIZER == recognizer ) {
|
107 |
// Dispose the channel.. don't know what to do with it.
|
|
108 | 0 |
dispose(); |
109 |
} |
|
110 |
|
|
111 | 12 |
SubPortAsynchChannelServer onePort = (SubPortAsynchChannelServer) recognizerMap.get(recognizer); |
112 | 12 |
if( onePort == null ) { |
113 |
// Dispose the channel.. don't know what to do with it.
|
|
114 | 0 |
dispose(); |
115 |
} |
|
116 |
|
|
117 |
// Once the magic number is found:
|
|
118 |
// Stop the channel so that a decision can be taken on what to
|
|
119 |
// do with the
|
|
120 |
// channel. When the channel is restarted, the buffered up
|
|
121 |
// packets wiil get
|
|
122 |
// delivered.
|
|
123 | 12 |
try {
|
124 | 12 |
stop(NO_WAIT_TIMEOUT); |
125 | 12 |
setAsynchChannelListener(null);
|
126 |
} catch (IOException e) {
|
|
127 | 0 |
getAsynchChannelListener().onPacketError(e); |
128 |
} |
|
129 |
|
|
130 | 12 |
Channel channel = getNext(); |
131 | 12 |
channel = AsynchToSynchChannelAdapter.adapt(channel); |
132 | 12 |
channel = new PushbackSynchChannel((SynchChannel) channel, buffer);
|
133 | 12 |
channel = SynchToAsynchChannelAdapter.adapt(channel); |
134 |
|
|
135 | 12 |
onePort.onAccept(channel); |
136 | 12 |
break;
|
137 |
} |
|
138 |
} |
|
139 |
} |
|
140 |
} |
|
141 |
|
|
142 |
/**
|
|
143 |
* Clients bind against the OnePortAsynchChannelServer and get
|
|
144 |
* SubPortAsynchChannelServer which can be used to accept connections.
|
|
145 |
*/
|
|
146 |
final private class SubPortAsynchChannelServer implements AsynchChannelServer { |
|
147 |
|
|
148 |
private final ProtocolRecognizer recognizer;
|
|
149 |
private AcceptListener acceptListener;
|
|
150 |
private boolean started; |
|
151 |
|
|
152 |
/**
|
|
153 |
* @param recognizer
|
|
154 |
*/
|
|
155 | 36 |
public SubPortAsynchChannelServer(ProtocolRecognizer recognizer) {
|
156 | 36 |
this.recognizer = recognizer;
|
157 |
} |
|
158 |
|
|
159 | 36 |
public void setAcceptListener(AcceptListener acceptListener) { |
160 | 36 |
this.acceptListener = acceptListener;
|
161 |
} |
|
162 |
|
|
163 | 0 |
public URI getBindURI() {
|
164 | 0 |
return next.getBindURI();
|
165 |
} |
|
166 |
|
|
167 | 12 |
public URI getConnectURI() {
|
168 | 12 |
return next.getConnectURI();
|
169 |
} |
|
170 |
|
|
171 | 36 |
public void dispose() { |
172 | 36 |
started = false;
|
173 | 36 |
recognizerMap.remove(recognizer); |
174 |
} |
|
175 |
|
|
176 | 36 |
public void start() throws IOException { |
177 | 36 |
started = true;
|
178 |
} |
|
179 | 0 |
public void stop(long timeout) throws IOException { |
180 | 0 |
started = false;
|
181 |
} |
|
182 |
|
|
183 | 12 |
void onAccept(Channel channel) {
|
184 | 12 |
if( started && acceptListener!=null ) { |
185 | 12 |
acceptListener.onAccept(channel); |
186 |
} else {
|
|
187 |
// Dispose the channel.. don't know what to do with it.
|
|
188 | 0 |
channel.dispose(); |
189 |
} |
|
190 |
} |
|
191 |
|
|
192 | 0 |
public Object narrow(Class target) {
|
193 | 0 |
if( target.isAssignableFrom(getClass()) ) {
|
194 | 0 |
return this; |
195 |
} |
|
196 | 0 |
return OnePortAsynchChannelServer.this.narrow(target); |
197 |
} |
|
198 |
|
|
199 |
} |
|
200 |
|
|
201 |
|
|
202 |
private final ConcurrentHashMap recognizerMap = new ConcurrentHashMap(); |
|
203 |
|
|
204 | 18 |
public OnePortAsynchChannelServer(AsynchChannelServer server) throws IOException { |
205 | 18 |
super(server);
|
206 | 18 |
super.setAcceptListener(new OnePortAcceptListener()); |
207 |
} |
|
208 |
|
|
209 | 0 |
public void setAcceptListener(AcceptListener acceptListener) { |
210 | 0 |
throw new IllegalAccessError("Not supported"); |
211 |
} |
|
212 |
|
|
213 | 36 |
public AsynchChannelServer bindAsynchChannel(ProtocolRecognizer recognizer) throws IOException { |
214 |
|
|
215 | 36 |
if( recognizerMap.contains(recognizer) )
|
216 | 0 |
throw new IOException("That recognizer is allredy bound."); |
217 |
|
|
218 | 36 |
SubPortAsynchChannelServer server = new SubPortAsynchChannelServer(recognizer);
|
219 | 36 |
Object old = recognizerMap.put(recognizer, server); |
220 | 36 |
return server;
|
221 |
} |
|
222 |
|
|
223 |
|
|
224 |
} |
|
225 |
|
|