1 |
ajm |
1.6 |
//---PACKAGE DECLARATION--- |
2 |
ajm |
1.10 |
package uk.ac.ukc.iscream.conient; |
3 |
ajm |
1.6 |
|
4 |
|
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//---IMPORTS--- |
5 |
ajm |
1.1 |
import uk.ac.ukc.iscream.util.*; |
6 |
ajm |
1.2 |
import java.io.*; |
7 |
ajm |
1.1 |
import java.net.*; |
8 |
ajm |
1.2 |
import javax.swing.JOptionPane; |
9 |
ajm |
1.1 |
|
10 |
ajm |
1.6 |
/** |
11 |
|
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* This is the main thread for the client. |
12 |
|
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* Once started i continually checks it actionQueue |
13 |
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* for actions that other areas of the system have placed |
14 |
|
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* there, it then performs those actions. |
15 |
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* |
16 |
|
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* Currently this is the main thread where all non-GUI events |
17 |
|
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* are dispatched to. |
18 |
|
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* |
19 |
ajm |
1.11 |
* @author $Author: ajm4 $ |
20 |
ajm |
1.20 |
* @version $Id: ConnectionHandler.java,v 1.19 2001/02/27 03:09:58 ajm4 Exp $ |
21 |
ajm |
1.6 |
*/ |
22 |
ajm |
1.1 |
public class ConnectionHandler extends Thread { |
23 |
ajm |
1.2 |
|
24 |
ajm |
1.6 |
//---FINAL ATTRIBUTES--- |
25 |
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26 |
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/** |
27 |
|
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* The current CVS revision of this class |
28 |
|
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*/ |
29 |
ajm |
1.20 |
public final String REVISION = "$Revision: 1.19 $"; |
30 |
ajm |
1.6 |
|
31 |
tdb |
1.7 |
|
32 |
|
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/** |
33 |
|
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* The hardcoded protocol version that we are using. |
34 |
|
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* Used when handshaking with the server |
35 |
|
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*/ |
36 |
ajm |
1.20 |
public final double PROTOCOL_VERSION = 1.1; |
37 |
ajm |
1.2 |
|
38 |
tdb |
1.7 |
/** |
39 |
|
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* Thread action DONOTHING. |
40 |
|
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* This is an invalid action, but here for completeness |
41 |
|
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* if anything sends this action it will warn appropriately |
42 |
|
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* but do what it says, ie, nothing ;) |
43 |
|
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*/ |
44 |
ajm |
1.1 |
public static final int DONOTHING = 0; |
45 |
tdb |
1.7 |
|
46 |
|
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/** |
47 |
|
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* Thread action CONNECT. |
48 |
|
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* Opens the control link to the i-scream server. |
49 |
|
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*/ |
50 |
ajm |
1.1 |
public static final int CONNECT = 1; |
51 |
tdb |
1.7 |
|
52 |
|
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/** |
53 |
|
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* Thread action STARTDATA. |
54 |
|
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* Opens the data link to the i-scream server |
55 |
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* and prepares all gui data components for data |
56 |
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* it then starts all relavant threads going. |
57 |
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*/ |
58 |
ajm |
1.2 |
public static final int STARTDATA = 2; |
59 |
tdb |
1.7 |
|
60 |
|
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/** |
61 |
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* Thread action STOPDATA. |
62 |
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* Closes the data link and shuts down all components |
63 |
|
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* that update gui for various things. |
64 |
|
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*/ |
65 |
ajm |
1.2 |
public static final int STOPDATA = 3; |
66 |
tdb |
1.7 |
|
67 |
|
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/** |
68 |
|
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* Thread action DISCONNECT. |
69 |
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* Checks to see if STOPDATA has been called if not, |
70 |
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* it will add STOPDATA and then DISCONNECT to |
71 |
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* the action queue and return. If STOPDATA has been |
72 |
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* called it closes down the Control Link and tidies up |
73 |
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* all relevant threads |
74 |
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*/ |
75 |
ajm |
1.2 |
public static final int DISCONNECT = 4; |
76 |
tdb |
1.7 |
|
77 |
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/** |
78 |
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* Thread action QUIT. |
79 |
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* Checks the status of the two links, if either |
80 |
|
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* are still up, it queues the appropriate commands |
81 |
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* to close them down. It then System.exit(0)'s! |
82 |
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*/ |
83 |
ajm |
1.4 |
public static final int QUIT = 5; |
84 |
ajm |
1.6 |
|
85 |
ajm |
1.12 |
/** |
86 |
ajm |
1.14 |
* Thread action GETCONFIGURATION |
87 |
|
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* Starts the command to obtain the configuration |
88 |
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* from the server. |
89 |
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* It then passes the IO to the Configuration object |
90 |
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* so it can obtain any specific configuration |
91 |
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*/ |
92 |
|
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public static final int GETCONFIGURATION = 6; |
93 |
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|
94 |
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/** |
95 |
ajm |
1.12 |
* This is the time in seconds that this class |
96 |
|
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* should wait on the DataReader class to fully |
97 |
|
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* shutdown after calling shutdown() before |
98 |
|
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* forcing a shutdown |
99 |
|
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*/ |
100 |
|
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public static final int DATAREADER_SHUTDOWN_TIMEOUT = 5; |
101 |
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|
102 |
ajm |
1.13 |
/** |
103 |
|
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* The default local server to connect to when a |
104 |
|
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* firewall is in use if one is not specified in the server |
105 |
|
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*/ |
106 |
|
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public static final String DEFAULT_FIREWALL_SERVER = "localhost"; |
107 |
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108 |
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/** |
109 |
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* The default time in seconds to wait for the |
110 |
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* firewall setup command to execute |
111 |
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*/ |
112 |
|
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public static final int DEFAULT_FIREWALL_COMMANDWAIT = 5; |
113 |
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|
114 |
ajm |
1.6 |
//---STATIC METHODS--- |
115 |
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116 |
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//---CONSTRUCTORS--- |
117 |
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|
118 |
tdb |
1.7 |
/** |
119 |
|
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* Constructs new data handler. |
120 |
|
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* Needs a reference to the data panel so that |
121 |
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* it can set it processing inBound data |
122 |
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* Also gets a reference to the queue that will be |
123 |
|
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* used by other areas of the system to send it actions |
124 |
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* |
125 |
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* @param data the DataPanel in use |
126 |
|
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* @param actionQueue the actionQueue for this class |
127 |
|
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*/ |
128 |
ajm |
1.1 |
public ConnectionHandler(DataPanel data, Queue actionQueue) { |
129 |
|
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_data = data; |
130 |
|
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_actionQueue = actionQueue; |
131 |
|
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_myQueue = _actionQueue.getQueue(); |
132 |
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} |
133 |
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|
134 |
ajm |
1.6 |
//---PUBLIC METHODS--- |
135 |
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|
136 |
tdb |
1.7 |
|
137 |
|
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/** |
138 |
|
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* Starts this ConnectionHandler running. |
139 |
|
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* This basically runs until told to stop, it gets "actions" |
140 |
|
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* from its actionQueue and switch's on them do determine |
141 |
|
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* what it should do it then carries out the action |
142 |
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* |
143 |
|
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* For details on what each action does see the action |
144 |
|
|
* types. |
145 |
|
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*/ |
146 |
ajm |
1.1 |
public void run() { |
147 |
ajm |
1.20 |
if(_configuration.getProperty("control.onstartconnect").equals("1")) { |
148 |
ajm |
1.13 |
_actionQueue.add(new Integer(CONNECT)); |
149 |
|
|
} |
150 |
ajm |
1.20 |
if(_configuration.getProperty("data.onstartconnect").equals("1")) { |
151 |
ajm |
1.13 |
_actionQueue.add(new Integer(STARTDATA)); |
152 |
|
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} |
153 |
tdb |
1.7 |
while(_running) { |
154 |
ajm |
1.1 |
// we wait for a call... |
155 |
|
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int action = 0; |
156 |
|
|
try { |
157 |
|
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action = ((Integer) _actionQueue.get(_myQueue)).intValue(); |
158 |
|
|
} catch (InvalidQueueException e) { |
159 |
ajm |
1.12 |
// we 're never going to get this |
160 |
|
|
// but if we do we should do something nasty |
161 |
|
|
throw new RuntimeException("unable to retrieve events from actionQueue!"); |
162 |
ajm |
1.1 |
} |
163 |
|
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|
164 |
|
|
// examine our action... |
165 |
|
|
// if it was to connect...then we connect... |
166 |
ajm |
1.2 |
switch(action) { |
167 |
|
|
case CONNECT: |
168 |
ajm |
1.12 |
if (_controlLink == null) { |
169 |
ajm |
1.13 |
try { |
170 |
|
|
// get the server name from the config |
171 |
|
|
_configuredServer = _configuration.getProperty("control.server"); |
172 |
|
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|
173 |
|
|
if (_configuredServer == null) { |
174 |
|
|
throw new IOException("no i-scream server in current configuration"); |
175 |
|
|
} |
176 |
|
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|
177 |
|
|
// open the socket to the server and bind the IO |
178 |
|
|
// get the port from the config |
179 |
|
|
String portString = _configuration.getProperty("control.port"); |
180 |
|
|
if (portString == null) { |
181 |
|
|
throw new IOException("no i-scream server port in current configuration"); |
182 |
|
|
} |
183 |
|
|
int port = 0; |
184 |
ajm |
1.12 |
try { |
185 |
ajm |
1.13 |
port = Integer.parseInt(portString); |
186 |
|
|
} catch (NumberFormatException e) { |
187 |
|
|
throw new IOException("no valid i-scream server port in current configuration"); |
188 |
|
|
} |
189 |
|
|
|
190 |
|
|
// start firewall if needed |
191 |
|
|
_server = handleFirewall(_configuredServer, port, _controlFirewallProcess); |
192 |
|
|
|
193 |
|
|
Conient.setControlStatus("Connecting to - " + _server); |
194 |
|
|
_controlLink = new Socket(_server, port); |
195 |
|
|
_inBound = new BufferedReader(new InputStreamReader(_controlLink.getInputStream())); |
196 |
|
|
_outBound = new PrintWriter(_controlLink.getOutputStream()); |
197 |
|
|
Conient.setControlStatus("Connection Established - " + _server); |
198 |
|
|
|
199 |
|
|
String response; |
200 |
|
|
response = _inBound.readLine(); |
201 |
|
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|
202 |
|
|
// check the servers Protocol Identity against our own |
203 |
|
|
// we SHOULD be backwards compatible, so we can continue if |
204 |
|
|
// they are using a newer protocol, anything else then we die |
205 |
|
|
if (!(Double.parseDouble(response.substring(10, response.length())) > PROTOCOL_VERSION)) { |
206 |
|
|
Conient.addMessage("WARNING{control link}: server is using a newer protocol (" + response + "), please update your client, continuing with old protocol (PROTOCOL " + PROTOCOL_VERSION + ")" ); |
207 |
|
|
} else if (!(Double.parseDouble(response.substring(10, response.length())) < PROTOCOL_VERSION)) { |
208 |
|
|
// tidy up |
209 |
|
|
throw new IOException("incompatible protocol version"); |
210 |
|
|
} |
211 |
|
|
|
212 |
|
|
// send the name of the client |
213 |
|
|
_outBound.println(_configuration.getProperty("clientname")); |
214 |
|
|
_outBound.flush(); |
215 |
|
|
response = _inBound.readLine(); |
216 |
|
|
if (!response.equals("OK")) { |
217 |
|
|
// tidy up |
218 |
ajm |
1.12 |
|
219 |
ajm |
1.13 |
throw new IOException("client name rejected - " + _configuration.getProperty("clientname")); |
220 |
|
|
} |
221 |
ajm |
1.14 |
// get the config...we are connected now! |
222 |
ajm |
1.18 |
getConfigFromServer(); |
223 |
ajm |
1.20 |
// set our host list if we know we have one we need to set |
224 |
|
|
String hostList = _configuration.getProperty("hostList"); |
225 |
|
|
boolean hostListSet = false; |
226 |
|
|
// send our hostList if we have |
227 |
|
|
if (_configuration.getProperty("useHostList").equals("1")) { |
228 |
|
|
if (hostList.equals("")) { |
229 |
|
|
Conient.addMessage("WARNING{control link}: your host list is empty, the server will send ALL hosts"); |
230 |
|
|
} |
231 |
|
|
hostListSet = setHostList(hostList); |
232 |
|
|
// if not, indicate we want the lot |
233 |
|
|
} else { |
234 |
|
|
hostListSet = setHostList(""); |
235 |
|
|
} |
236 |
|
|
// warn if there was a problem, it will have already error'd |
237 |
|
|
if (!hostListSet) { |
238 |
|
|
Conient.addMessage("WARNING{control link}: unable to set host list"); |
239 |
|
|
} |
240 |
ajm |
1.13 |
} catch (IOException e) { |
241 |
|
|
// print the error and tidy up what's left |
242 |
|
|
Conient.addMessage("ERROR{control link}: " + e); |
243 |
|
|
_controlLink = null; |
244 |
|
|
// and the firewall handler if there is one |
245 |
ajm |
1.16 |
closeFirewall(_controlFirewallProcess); |
246 |
ajm |
1.13 |
_actionQueue.clearQueue(_myQueue); |
247 |
|
|
Conient.setControlStatus("Disconnected"); |
248 |
ajm |
1.2 |
} |
249 |
ajm |
1.12 |
} else { |
250 |
|
|
Conient.addMessage("WARNING{control link}: already established"); |
251 |
ajm |
1.2 |
} |
252 |
|
|
break; |
253 |
|
|
case STARTDATA: |
254 |
ajm |
1.12 |
// as long as the data link hasn't been established |
255 |
|
|
// we want to establish it |
256 |
|
|
if (_dataLink == null) { |
257 |
|
|
// check that the control link is open, if it isn't we |
258 |
|
|
// might want to sort that problemo out |
259 |
|
|
// we do this by simply queueing the event to occour, then |
260 |
|
|
// this event to run again ;-) |
261 |
tdb |
1.7 |
if(_controlLink == null) { |
262 |
ajm |
1.12 |
Conient.addMessage("WARNING{data link}: control link not established - queueing start events"); |
263 |
tdb |
1.7 |
_actionQueue.add(new Integer(CONNECT)); |
264 |
|
|
_actionQueue.add(new Integer(STARTDATA)); |
265 |
ajm |
1.12 |
} else { |
266 |
|
|
try { |
267 |
|
|
|
268 |
|
|
// ask the server to start the data link |
269 |
|
|
String response; |
270 |
|
|
_outBound.println("STARTDATA"); |
271 |
|
|
_outBound.flush(); |
272 |
|
|
response = _inBound.readLine(); |
273 |
|
|
|
274 |
|
|
// see if the server suggested a good port |
275 |
|
|
if (response.equals("ERROR")) { |
276 |
|
|
throw new IOException("server unable to start data link at this time"); |
277 |
|
|
} |
278 |
ajm |
1.13 |
int port = 0; |
279 |
ajm |
1.12 |
try { |
280 |
ajm |
1.13 |
port = Integer.parseInt(response); |
281 |
ajm |
1.12 |
} catch (NumberFormatException e) { |
282 |
|
|
throw new IOException("invalid data port suggested by server - " + response); |
283 |
|
|
} |
284 |
|
|
|
285 |
ajm |
1.13 |
// start firewall if needed |
286 |
|
|
_server = handleFirewall(_configuredServer, port, _dataFirewallProcess); |
287 |
|
|
Conient.setDataStatus("Connecting to - " + _server + ":" + response); |
288 |
|
|
|
289 |
|
|
_dataLink = new Socket(_server, port); |
290 |
|
|
|
291 |
ajm |
1.12 |
response = _inBound.readLine(); |
292 |
|
|
if (!response.equals("OK")) { |
293 |
|
|
throw new IOException("server reported error establishing data channel"); |
294 |
|
|
} |
295 |
|
|
|
296 |
|
|
// if the socket was ok, then we attack our IO hooks |
297 |
|
|
_dataInBound = new BufferedReader(new InputStreamReader(_dataLink.getInputStream())); |
298 |
|
|
_dataOutBound = new PrintWriter(_dataLink.getOutputStream()); |
299 |
|
|
Conient.setDataStatus("Connection Established - " + _server); |
300 |
ajm |
1.15 |
// now we want to start reading the data in |
301 |
|
|
// so we start the appropriate components on their way |
302 |
|
|
// we create a queue to give to both the reader and the |
303 |
|
|
// displayer |
304 |
|
|
Queue theQueue = new Queue(); |
305 |
|
|
_dataReader = new DataReader(_dataInBound, theQueue); |
306 |
|
|
_data.setQueue(theQueue); |
307 |
|
|
_data.cleanUpTabs(); |
308 |
|
|
|
309 |
|
|
// start the data rocking |
310 |
|
|
new Thread(_data).start(); |
311 |
|
|
_dataReader.start(); |
312 |
|
|
// finished for us.... |
313 |
ajm |
1.12 |
} catch (IOException e) { |
314 |
|
|
// print the error and tidy up what's left |
315 |
|
|
Conient.addMessage("ERROR{data link}: " + e); |
316 |
|
|
_dataLink = null; |
317 |
ajm |
1.16 |
// and the firewall handler if there is one |
318 |
|
|
closeFirewall(_dataFirewallProcess); |
319 |
ajm |
1.13 |
_actionQueue.clearQueue(_myQueue); |
320 |
ajm |
1.12 |
Conient.setDataStatus("Disconnected"); |
321 |
|
|
} |
322 |
ajm |
1.2 |
} |
323 |
ajm |
1.12 |
} else { |
324 |
|
|
Conient.addMessage("WARNING{data link}: already established"); |
325 |
ajm |
1.2 |
} |
326 |
|
|
break; |
327 |
|
|
case STOPDATA: |
328 |
ajm |
1.12 |
if(_dataLink != null) { |
329 |
|
|
try { |
330 |
|
|
String response; |
331 |
|
|
// shut down the data link |
332 |
|
|
Conient.setDataStatus("Disconnecting - " + _server); |
333 |
|
|
|
334 |
|
|
// close the reader |
335 |
|
|
_dataReader.shutdown(); |
336 |
|
|
// wait for it to close |
337 |
|
|
boolean dirtyShutdown = true; |
338 |
|
|
long startTime = System.currentTimeMillis(); |
339 |
|
|
while((System.currentTimeMillis() - startTime) < (DATAREADER_SHUTDOWN_TIMEOUT * 1000)) { |
340 |
|
|
if (!_dataReader.isAlive()) { |
341 |
|
|
dirtyShutdown = false; |
342 |
|
|
break; |
343 |
|
|
} |
344 |
|
|
} |
345 |
|
|
// warn if it didn't shutdown in time |
346 |
|
|
if (dirtyShutdown) { |
347 |
|
|
Conient.addMessage("WARNING{data link}: data reader thread did not close within timeout, killing its IO anyway!"); |
348 |
|
|
} |
349 |
|
|
|
350 |
|
|
// tell the server |
351 |
|
|
_outBound.println("STOPDATA"); |
352 |
|
|
_outBound.flush(); |
353 |
|
|
response = _inBound.readLine(); |
354 |
|
|
|
355 |
|
|
// check the server was ok with our request... |
356 |
|
|
// even if it wasn't we will go anyway! |
357 |
|
|
if (!response.equals("OK")) { |
358 |
|
|
throw new IOException("server didn't OK request to stop data channel - stopping anyway"); |
359 |
|
|
} |
360 |
|
|
|
361 |
|
|
|
362 |
|
|
// close the lot down |
363 |
|
|
_dataInBound.close(); |
364 |
|
|
_dataOutBound.close(); |
365 |
|
|
_dataLink.close(); |
366 |
|
|
// get rid of the socket |
367 |
|
|
_dataLink = null; |
368 |
ajm |
1.13 |
|
369 |
|
|
// and the firewall handler if there is one |
370 |
ajm |
1.16 |
closeFirewall(_dataFirewallProcess); |
371 |
ajm |
1.13 |
|
372 |
ajm |
1.12 |
Conient.setDataStatus("Disconnected"); |
373 |
|
|
} catch (IOException e) { |
374 |
|
|
// print the error and tidy up what's left |
375 |
|
|
Conient.addMessage("ERROR{data link}: " + e); |
376 |
|
|
try { |
377 |
|
|
_dataOutBound.close(); |
378 |
|
|
_dataInBound.close(); |
379 |
|
|
_dataLink.close(); |
380 |
ajm |
1.13 |
// and the firewall handler if there is one |
381 |
ajm |
1.16 |
closeFirewall(_dataFirewallProcess); |
382 |
ajm |
1.12 |
} catch (IOException e2) { |
383 |
|
|
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
384 |
|
|
} |
385 |
|
|
_dataLink = null; |
386 |
ajm |
1.13 |
_actionQueue.clearQueue(_myQueue); |
387 |
ajm |
1.12 |
Conient.setDataStatus("Disconnected"); |
388 |
ajm |
1.2 |
} |
389 |
ajm |
1.12 |
} else { |
390 |
|
|
Conient.addMessage("WARNING{data link}: already disconnected"); |
391 |
ajm |
1.2 |
} |
392 |
|
|
break; |
393 |
|
|
case DISCONNECT: |
394 |
ajm |
1.12 |
if (_controlLink != null) { |
395 |
ajm |
1.2 |
if (_dataLink != null) { |
396 |
ajm |
1.12 |
// we want to tell ourselves to stop it |
397 |
|
|
Conient.addMessage("WARNING{control link}: data link not disconnected - queueing stop events"); |
398 |
|
|
_actionQueue.add(new Integer(STOPDATA)); |
399 |
|
|
_actionQueue.add(new Integer(DISCONNECT)); |
400 |
|
|
} else { |
401 |
|
|
try { |
402 |
|
|
// request the server to disconnect |
403 |
|
|
String response; |
404 |
|
|
_outBound.println("DISCONNECT"); |
405 |
|
|
_outBound.flush(); |
406 |
|
|
response = _inBound.readLine(); |
407 |
|
|
|
408 |
|
|
// check the server was ok with our request... |
409 |
|
|
// even if it wasn't we will go anyway! |
410 |
|
|
if (!response.equals("OK")) { |
411 |
|
|
throw new IOException("server didn't OK request to stop control channel - stopping anyway"); |
412 |
|
|
} |
413 |
|
|
|
414 |
|
|
// then lets shutdown the link |
415 |
|
|
Conient.setControlStatus("Disconnecting - " + _server); |
416 |
|
|
_inBound.close(); |
417 |
|
|
_outBound.close(); |
418 |
|
|
_controlLink.close(); |
419 |
|
|
// for good measure |
420 |
|
|
_controlLink = null; |
421 |
ajm |
1.13 |
|
422 |
|
|
// and the firewall handler if there is one |
423 |
ajm |
1.16 |
closeFirewall(_controlFirewallProcess); |
424 |
ajm |
1.13 |
|
425 |
ajm |
1.12 |
Conient.setControlStatus("Disconnected"); |
426 |
|
|
} catch (IOException e) { |
427 |
ajm |
1.14 |
Conient.addMessage("ERROR{control link}: " + e); |
428 |
ajm |
1.12 |
try { |
429 |
|
|
_inBound.close(); |
430 |
|
|
_outBound.close(); |
431 |
|
|
_controlLink.close(); |
432 |
ajm |
1.13 |
// and the firewall handler if there is one |
433 |
ajm |
1.16 |
closeFirewall(_controlFirewallProcess); |
434 |
ajm |
1.12 |
} catch (IOException e2) { |
435 |
|
|
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
436 |
|
|
} |
437 |
|
|
_controlLink = null; |
438 |
ajm |
1.13 |
_actionQueue.clearQueue(_myQueue); |
439 |
ajm |
1.12 |
Conient.setControlStatus("Disconnected"); |
440 |
|
|
} |
441 |
ajm |
1.2 |
} |
442 |
ajm |
1.12 |
} else { |
443 |
|
|
Conient.addMessage("WARNING{control link}: already disconnected"); |
444 |
ajm |
1.1 |
} |
445 |
ajm |
1.2 |
break; |
446 |
ajm |
1.4 |
case QUIT: |
447 |
ajm |
1.12 |
Conient.addMessage("Exiting."); |
448 |
ajm |
1.5 |
try { |
449 |
|
|
// stop data and control if data up |
450 |
|
|
if (_dataLink != null) { |
451 |
|
|
_actionQueue.add(new Integer(STOPDATA)); |
452 |
|
|
_actionQueue.add(new Integer(DISCONNECT)); |
453 |
|
|
_actionQueue.add(new Integer(QUIT)); |
454 |
|
|
throw new IOException(); |
455 |
|
|
} |
456 |
|
|
// stop control |
457 |
|
|
if (_controlLink != null) { |
458 |
|
|
_actionQueue.add(new Integer(DISCONNECT)); |
459 |
|
|
_actionQueue.add(new Integer(QUIT)); |
460 |
|
|
throw new IOException(); |
461 |
|
|
} |
462 |
ajm |
1.11 |
Conient.addMessage("Finished."); |
463 |
ajm |
1.5 |
// go! |
464 |
|
|
System.exit(0); |
465 |
|
|
} catch (IOException e) { |
466 |
ajm |
1.12 |
Conient.addMessage("WARNING: open connections detected - queueing stop events"); |
467 |
ajm |
1.4 |
} |
468 |
|
|
break; |
469 |
ajm |
1.14 |
case GETCONFIGURATION: |
470 |
ajm |
1.18 |
getConfigFromServer(); |
471 |
ajm |
1.14 |
break; |
472 |
ajm |
1.1 |
} |
473 |
|
|
} |
474 |
|
|
} |
475 |
|
|
|
476 |
ajm |
1.12 |
/** |
477 |
|
|
* This method allows other classes |
478 |
|
|
* to shutdown this connection handler. |
479 |
|
|
*/ |
480 |
|
|
public void shutdown() { |
481 |
|
|
_running = false; |
482 |
|
|
} |
483 |
|
|
|
484 |
ajm |
1.6 |
//---PRIVATE METHODS--- |
485 |
ajm |
1.18 |
|
486 |
|
|
/** |
487 |
ajm |
1.20 |
* This method performs the SETHOSTLIST command. |
488 |
|
|
* This is run by the CONNECT command. |
489 |
|
|
* It tells the server which hosts we are interested |
490 |
|
|
* in, if "" is sent, this indicates we want ALL hosts. |
491 |
|
|
* |
492 |
|
|
* @param hostList the list of hosts as gained from the config |
493 |
|
|
* @return if we succeeded in setting the host list |
494 |
|
|
*/ |
495 |
|
|
private boolean setHostList(String hostList) { |
496 |
|
|
boolean success = false; |
497 |
|
|
// must have a control link open |
498 |
|
|
if (_controlLink != null) { |
499 |
|
|
// data link must be closed (according to 1.1 PROTOCOL) |
500 |
|
|
if(_dataLink == null) { |
501 |
|
|
try { |
502 |
|
|
String response = null; |
503 |
|
|
_outBound.println("SETHOSTLIST"); |
504 |
|
|
_outBound.flush(); |
505 |
|
|
response = _inBound.readLine(); |
506 |
|
|
if (!response.equals("OK")) { |
507 |
|
|
throw new IOException("server refused - data link possibly still open?"); |
508 |
|
|
} |
509 |
|
|
_outBound.println(hostList); |
510 |
|
|
_outBound.flush(); |
511 |
|
|
response = _inBound.readLine(); |
512 |
|
|
if (!response.equals("OK")) { |
513 |
|
|
throw new IOException("server had trouble with our request"); |
514 |
|
|
} |
515 |
|
|
success = true; |
516 |
|
|
} catch (IOException e) { |
517 |
|
|
Conient.addMessage("ERROR{control link}: when setting hostlist - " + e); |
518 |
|
|
} |
519 |
|
|
} |
520 |
|
|
} |
521 |
|
|
return success; |
522 |
|
|
} |
523 |
|
|
|
524 |
|
|
|
525 |
|
|
/** |
526 |
ajm |
1.18 |
* This method performs the STARTCONFIG command on |
527 |
|
|
* the server. this method is called after a CONNECT, |
528 |
|
|
* and when a GETCONFIGURATION command is called. |
529 |
|
|
*/ |
530 |
|
|
private void getConfigFromServer() { |
531 |
|
|
if(_controlLink != null) { |
532 |
|
|
try { |
533 |
|
|
String response = null; |
534 |
|
|
_outBound.println("STARTCONFIG"); |
535 |
|
|
_outBound.flush(); |
536 |
|
|
response = _inBound.readLine(); |
537 |
|
|
if (!response.equals("OK")) { |
538 |
|
|
throw new IOException("server refused (" + response + ")"); |
539 |
|
|
} |
540 |
|
|
_configuration.readServerConfiguration(_inBound, _outBound); |
541 |
|
|
_outBound.println("ENDCONFIG"); |
542 |
|
|
_outBound.flush(); |
543 |
|
|
response = _inBound.readLine(); |
544 |
|
|
if (!response.equals("OK")) { |
545 |
|
|
throw new IOException("server reported error when finishing configuration"); |
546 |
|
|
} |
547 |
|
|
} catch (IOException e) { |
548 |
|
|
Conient.addMessage("ERROR{control link}: when getting configuration - " + e); |
549 |
|
|
} |
550 |
|
|
} |
551 |
|
|
} |
552 |
ajm |
1.6 |
|
553 |
ajm |
1.13 |
/** |
554 |
|
|
* Handles opening pipes through firewalls. |
555 |
|
|
* It checks the configuration for various entries |
556 |
|
|
* to set up the link or not. |
557 |
|
|
* |
558 |
|
|
* If a link is setup it will return the name of the |
559 |
|
|
* new server to connect to, if a link is NOT setup, |
560 |
|
|
* it will simply return the original server name. |
561 |
|
|
* |
562 |
|
|
* The name of the machine that the pipe is setup on |
563 |
|
|
* defaults to "localhost", unless the configuration |
564 |
|
|
* specifies otherwise. |
565 |
|
|
* |
566 |
|
|
* Once it has run the firewall command it then waits |
567 |
|
|
* a set period according to the config for the firewall |
568 |
|
|
* pipe to be set up. |
569 |
|
|
* |
570 |
|
|
* The firewall process should be destroyed when the |
571 |
|
|
* link is finished with. |
572 |
|
|
* |
573 |
|
|
* @param server the name of the server to open up the pipe to |
574 |
|
|
* @param port the port number to open up the pipe to |
575 |
|
|
* @param firewallProcess the holder for the new firewall process |
576 |
|
|
* @return the server to connect to, as determined by this routine |
577 |
|
|
*/ |
578 |
|
|
private String handleFirewall(String server, int port, Process firewallProcess) { |
579 |
|
|
String firewallCommand = _configuration.getProperty("firewall.command"); |
580 |
ajm |
1.19 |
String useFirewall = _configuration.getProperty("useFirewall"); |
581 |
ajm |
1.13 |
String firewallCommandWait = _configuration.getProperty("firewall.commandwait"); |
582 |
|
|
String firewallServer = _configuration.getProperty("firewall.server"); |
583 |
|
|
// if we are running firewall support...then lets start it |
584 |
ajm |
1.20 |
if (useFirewall.equals("1")) { |
585 |
ajm |
1.13 |
// clean up the command with what we want |
586 |
|
|
firewallCommand = replaceText(firewallCommand, "%PORT%", new Integer(port).toString()); |
587 |
|
|
firewallCommand = replaceText(firewallCommand, "%SERVER%", server); |
588 |
|
|
Conient.addMessage("WARNING{firewall}: firewall pipes requested, running pipe setup command \"" + firewallCommand + "\""); |
589 |
|
|
try { |
590 |
|
|
// run the command |
591 |
|
|
firewallProcess = Runtime.getRuntime().exec(firewallCommand); |
592 |
|
|
|
593 |
|
|
// work out how long we should wait before carrying on |
594 |
|
|
int time = 0; |
595 |
|
|
try { |
596 |
|
|
time = Integer.parseInt(firewallCommandWait); |
597 |
|
|
} catch (NumberFormatException e) { |
598 |
|
|
time = 0; |
599 |
|
|
} |
600 |
|
|
if (time == 0) { |
601 |
|
|
time = DEFAULT_FIREWALL_COMMANDWAIT; |
602 |
|
|
} |
603 |
|
|
Conient.addMessage("WARNING{firewall}: waiting " + time + " seconds for command to complete!"); |
604 |
|
|
// wait for the command to finish |
605 |
|
|
try { |
606 |
|
|
Thread.sleep(time * 1000); |
607 |
|
|
} catch (InterruptedException e) { |
608 |
|
|
} |
609 |
|
|
|
610 |
|
|
// set the server we want to return |
611 |
|
|
server = firewallServer; |
612 |
ajm |
1.19 |
if (server.equals("")) { |
613 |
ajm |
1.13 |
server = DEFAULT_FIREWALL_SERVER; |
614 |
|
|
} |
615 |
|
|
} catch (IOException e) { |
616 |
|
|
Conient.addMessage("ERROR{firewall}: unable to start pipe to i-scream server"); |
617 |
|
|
} |
618 |
|
|
} |
619 |
|
|
return server; |
620 |
ajm |
1.16 |
} |
621 |
|
|
|
622 |
|
|
/** |
623 |
|
|
* Checks to see if the given firewall process |
624 |
|
|
* has been created. If it has it calls destroy() |
625 |
|
|
* on it. |
626 |
|
|
* |
627 |
|
|
* @param firewallProcess the process to check |
628 |
|
|
*/ |
629 |
|
|
private void closeFirewall(Process firewallProcess) { |
630 |
|
|
if (firewallProcess != null) { |
631 |
ajm |
1.17 |
firewallProcess.destroy(); |
632 |
|
|
firewallProcess = null; |
633 |
ajm |
1.16 |
Conient.addMessage("WARNING{firewall}: firewall process destroyed"); |
634 |
|
|
} |
635 |
ajm |
1.13 |
} |
636 |
|
|
|
637 |
|
|
/** |
638 |
|
|
* Searches a string and replaces all occurences |
639 |
|
|
* of the given search text with the given replacement |
640 |
|
|
* text. |
641 |
|
|
* |
642 |
|
|
* @param text the text to search and replace in |
643 |
|
|
* @param search the string to look for and replace |
644 |
|
|
* @param replace the text to replace with |
645 |
|
|
* @return the updated version of text |
646 |
|
|
*/ |
647 |
|
|
private String replaceText(String text, String search, String replace) { |
648 |
|
|
StringBuffer textBuffer = new StringBuffer(text); |
649 |
|
|
int currIndex = 0; |
650 |
|
|
currIndex = text.indexOf(search, currIndex); |
651 |
|
|
while(currIndex != -1) { |
652 |
|
|
if (currIndex != -1) { |
653 |
|
|
textBuffer.delete(currIndex, currIndex + search.length()); |
654 |
|
|
textBuffer.insert(currIndex, replace); |
655 |
|
|
} |
656 |
|
|
text = textBuffer.toString(); |
657 |
|
|
currIndex = text.indexOf(search, currIndex + search.length()); |
658 |
|
|
} |
659 |
|
|
return new String(textBuffer); |
660 |
|
|
} |
661 |
ajm |
1.6 |
//---ACCESSOR/MUTATOR METHODS--- |
662 |
|
|
|
663 |
|
|
//---ATTRIBUTES--- |
664 |
|
|
|
665 |
ajm |
1.12 |
/** |
666 |
|
|
* The state if this thread |
667 |
|
|
*/ |
668 |
ajm |
1.13 |
private boolean _running = true; |
669 |
ajm |
1.12 |
|
670 |
|
|
/** |
671 |
|
|
* A reference to the displaying class DataPanel |
672 |
|
|
*/ |
673 |
ajm |
1.13 |
private DataPanel _data; |
674 |
ajm |
1.12 |
|
675 |
|
|
/** |
676 |
|
|
* The queue that actions are added to by other parts of the system |
677 |
|
|
*/ |
678 |
ajm |
1.13 |
private Queue _actionQueue; |
679 |
ajm |
1.12 |
|
680 |
|
|
/** |
681 |
|
|
* The queue number that we are reading from on the action queue |
682 |
|
|
*/ |
683 |
ajm |
1.13 |
private int _myQueue; |
684 |
ajm |
1.12 |
|
685 |
|
|
/** |
686 |
|
|
* The control link socket |
687 |
|
|
*/ |
688 |
ajm |
1.13 |
private Socket _controlLink; |
689 |
ajm |
1.12 |
|
690 |
|
|
/** |
691 |
|
|
* The data link socket |
692 |
|
|
*/ |
693 |
ajm |
1.13 |
private Socket _dataLink; |
694 |
ajm |
1.12 |
|
695 |
|
|
/** |
696 |
|
|
* The input for the control link |
697 |
|
|
*/ |
698 |
ajm |
1.13 |
private BufferedReader _inBound; |
699 |
ajm |
1.12 |
|
700 |
|
|
/** |
701 |
|
|
* The output for the control link |
702 |
|
|
*/ |
703 |
ajm |
1.13 |
private PrintWriter _outBound; |
704 |
ajm |
1.12 |
|
705 |
|
|
/** |
706 |
|
|
* The input for the data link |
707 |
|
|
*/ |
708 |
ajm |
1.13 |
private BufferedReader _dataInBound; |
709 |
ajm |
1.12 |
|
710 |
|
|
/** |
711 |
|
|
* The output for the data link |
712 |
|
|
*/ |
713 |
ajm |
1.13 |
private PrintWriter _dataOutBound; |
714 |
ajm |
1.12 |
|
715 |
|
|
/** |
716 |
|
|
* A reference to the DataReader in use |
717 |
|
|
*/ |
718 |
ajm |
1.13 |
private DataReader _dataReader; |
719 |
|
|
|
720 |
|
|
/** |
721 |
|
|
* A reference to the system configuration component |
722 |
|
|
*/ |
723 |
|
|
private Configuration _configuration = Configuration.getInstance(); |
724 |
|
|
|
725 |
|
|
/** |
726 |
|
|
* The server we will be connecting to |
727 |
|
|
*/ |
728 |
|
|
private String _server = null; |
729 |
ajm |
1.12 |
|
730 |
|
|
/** |
731 |
ajm |
1.13 |
* The server that the config says we should connect to |
732 |
ajm |
1.12 |
*/ |
733 |
ajm |
1.13 |
private String _configuredServer = null; |
734 |
ajm |
1.6 |
|
735 |
ajm |
1.13 |
/** |
736 |
|
|
* The process used to start the firewall pipe |
737 |
|
|
* for the control link. |
738 |
|
|
*/ |
739 |
|
|
private Process _controlFirewallProcess = null; |
740 |
|
|
|
741 |
|
|
/** |
742 |
|
|
* The process used to start the firewall pipe |
743 |
|
|
* for the data link. |
744 |
|
|
*/ |
745 |
|
|
private Process _dataFirewallProcess = null; |
746 |
|
|
|
747 |
ajm |
1.6 |
//---STATIC ATTRIBUTES--- |
748 |
|
|
|
749 |
ajm |
1.1 |
} |