1 |
//---PACKAGE DECLARATION--- |
2 |
package uk.ac.ukc.iscream.conient; |
3 |
|
4 |
//---IMPORTS--- |
5 |
import uk.ac.ukc.iscream.util.*; |
6 |
import java.io.*; |
7 |
import java.net.*; |
8 |
import javax.swing.JOptionPane; |
9 |
|
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/** |
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* This is the main thread for the client. |
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* Once started i continually checks it actionQueue |
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* for actions that other areas of the system have placed |
14 |
* there, it then performs those actions. |
15 |
* |
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* Currently this is the main thread where all non-GUI events |
17 |
* are dispatched to. |
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* |
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* @author $Author: ajm4 $ |
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* @version $Id: ConnectionHandler.java,v 1.17 2001/02/05 01:44:01 ajm4 Exp $ |
21 |
*/ |
22 |
public class ConnectionHandler extends Thread { |
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|
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//---FINAL ATTRIBUTES--- |
25 |
|
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/** |
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* The current CVS revision of this class |
28 |
*/ |
29 |
public final String REVISION = "$Revision: 1.17 $"; |
30 |
|
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|
32 |
/** |
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* The hardcoded protocol version that we are using. |
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* Used when handshaking with the server |
35 |
*/ |
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public final double PROTOCOL_VERSION = 1.0; |
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|
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/** |
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* Thread action DONOTHING. |
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* This is an invalid action, but here for completeness |
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* if anything sends this action it will warn appropriately |
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* but do what it says, ie, nothing ;) |
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*/ |
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public static final int DONOTHING = 0; |
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|
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/** |
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* Thread action CONNECT. |
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* Opens the control link to the i-scream server. |
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*/ |
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public static final int CONNECT = 1; |
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|
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/** |
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* Thread action STARTDATA. |
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* Opens the data link to the i-scream server |
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* and prepares all gui data components for data |
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* it then starts all relavant threads going. |
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*/ |
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public static final int STARTDATA = 2; |
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|
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/** |
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* Thread action STOPDATA. |
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* Closes the data link and shuts down all components |
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* that update gui for various things. |
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*/ |
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public static final int STOPDATA = 3; |
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|
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/** |
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* Thread action DISCONNECT. |
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* Checks to see if STOPDATA has been called if not, |
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* it will add STOPDATA and then DISCONNECT to |
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* the action queue and return. If STOPDATA has been |
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* called it closes down the Control Link and tidies up |
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* all relevant threads |
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*/ |
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public static final int DISCONNECT = 4; |
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|
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/** |
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* Thread action QUIT. |
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* Checks the status of the two links, if either |
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* are still up, it queues the appropriate commands |
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* to close them down. It then System.exit(0)'s! |
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*/ |
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public static final int QUIT = 5; |
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|
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/** |
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* Thread action GETCONFIGURATION |
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* Starts the command to obtain the configuration |
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* from the server. |
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* It then passes the IO to the Configuration object |
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* so it can obtain any specific configuration |
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*/ |
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public static final int GETCONFIGURATION = 6; |
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|
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/** |
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* This is the time in seconds that this class |
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* should wait on the DataReader class to fully |
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* shutdown after calling shutdown() before |
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* forcing a shutdown |
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*/ |
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public static final int DATAREADER_SHUTDOWN_TIMEOUT = 5; |
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|
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/** |
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* The default local server to connect to when a |
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* firewall is in use if one is not specified in the server |
105 |
*/ |
106 |
public static final String DEFAULT_FIREWALL_SERVER = "localhost"; |
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|
108 |
/** |
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* The default time in seconds to wait for the |
110 |
* firewall setup command to execute |
111 |
*/ |
112 |
public static final int DEFAULT_FIREWALL_COMMANDWAIT = 5; |
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|
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//---STATIC METHODS--- |
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|
116 |
//---CONSTRUCTORS--- |
117 |
|
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/** |
119 |
* Constructs new data handler. |
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* Needs a reference to the data panel so that |
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* it can set it processing inBound data |
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* Also gets a reference to the queue that will be |
123 |
* used by other areas of the system to send it actions |
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* |
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* @param data the DataPanel in use |
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* @param actionQueue the actionQueue for this class |
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*/ |
128 |
public ConnectionHandler(DataPanel data, Queue actionQueue) { |
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_data = data; |
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_actionQueue = actionQueue; |
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_myQueue = _actionQueue.getQueue(); |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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|
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/** |
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* Starts this ConnectionHandler running. |
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* This basically runs until told to stop, it gets "actions" |
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* from its actionQueue and switch's on them do determine |
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* what it should do it then carries out the action |
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* |
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* For details on what each action does see the action |
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* types. |
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*/ |
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public void run() { |
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if(_configuration.getProperty("control.onstartconnect") != null) { |
148 |
_actionQueue.add(new Integer(CONNECT)); |
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} |
150 |
if(_configuration.getProperty("data.onstartconnect") != null) { |
151 |
_actionQueue.add(new Integer(STARTDATA)); |
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} |
153 |
while(_running) { |
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// we wait for a call... |
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int action = 0; |
156 |
try { |
157 |
action = ((Integer) _actionQueue.get(_myQueue)).intValue(); |
158 |
} catch (InvalidQueueException e) { |
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// we 're never going to get this |
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// but if we do we should do something nasty |
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throw new RuntimeException("unable to retrieve events from actionQueue!"); |
162 |
} |
163 |
|
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// examine our action... |
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// if it was to connect...then we connect... |
166 |
switch(action) { |
167 |
case CONNECT: |
168 |
if (_controlLink == null) { |
169 |
try { |
170 |
// get the server name from the config |
171 |
_configuredServer = _configuration.getProperty("control.server"); |
172 |
|
173 |
if (_configuredServer == null) { |
174 |
throw new IOException("no i-scream server in current configuration"); |
175 |
} |
176 |
|
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 |
try { |
185 |
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(); |
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|
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// check the servers Protocol Identity against our own |
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// we SHOULD be backwards compatible, so we can continue if |
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// 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)) { |
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// 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 |
|
219 |
throw new IOException("client name rejected - " + _configuration.getProperty("clientname")); |
220 |
} |
221 |
// get the config...we are connected now! |
222 |
getConfigFromServer(); |
223 |
} catch (IOException e) { |
224 |
// print the error and tidy up what's left |
225 |
Conient.addMessage("ERROR{control link}: " + e); |
226 |
_controlLink = null; |
227 |
// and the firewall handler if there is one |
228 |
closeFirewall(_controlFirewallProcess); |
229 |
_actionQueue.clearQueue(_myQueue); |
230 |
Conient.setControlStatus("Disconnected"); |
231 |
} |
232 |
} else { |
233 |
Conient.addMessage("WARNING{control link}: already established"); |
234 |
} |
235 |
break; |
236 |
case STARTDATA: |
237 |
// as long as the data link hasn't been established |
238 |
// we want to establish it |
239 |
if (_dataLink == null) { |
240 |
// check that the control link is open, if it isn't we |
241 |
// might want to sort that problemo out |
242 |
// we do this by simply queueing the event to occour, then |
243 |
// this event to run again ;-) |
244 |
if(_controlLink == null) { |
245 |
Conient.addMessage("WARNING{data link}: control link not established - queueing start events"); |
246 |
_actionQueue.add(new Integer(CONNECT)); |
247 |
_actionQueue.add(new Integer(STARTDATA)); |
248 |
} else { |
249 |
try { |
250 |
|
251 |
// ask the server to start the data link |
252 |
String response; |
253 |
_outBound.println("STARTDATA"); |
254 |
_outBound.flush(); |
255 |
response = _inBound.readLine(); |
256 |
|
257 |
// see if the server suggested a good port |
258 |
if (response.equals("ERROR")) { |
259 |
throw new IOException("server unable to start data link at this time"); |
260 |
} |
261 |
int port = 0; |
262 |
try { |
263 |
port = Integer.parseInt(response); |
264 |
} catch (NumberFormatException e) { |
265 |
throw new IOException("invalid data port suggested by server - " + response); |
266 |
} |
267 |
|
268 |
// start firewall if needed |
269 |
_server = handleFirewall(_configuredServer, port, _dataFirewallProcess); |
270 |
Conient.setDataStatus("Connecting to - " + _server + ":" + response); |
271 |
|
272 |
_dataLink = new Socket(_server, port); |
273 |
|
274 |
response = _inBound.readLine(); |
275 |
if (!response.equals("OK")) { |
276 |
throw new IOException("server reported error establishing data channel"); |
277 |
} |
278 |
|
279 |
// if the socket was ok, then we attack our IO hooks |
280 |
_dataInBound = new BufferedReader(new InputStreamReader(_dataLink.getInputStream())); |
281 |
_dataOutBound = new PrintWriter(_dataLink.getOutputStream()); |
282 |
Conient.setDataStatus("Connection Established - " + _server); |
283 |
// now we want to start reading the data in |
284 |
// so we start the appropriate components on their way |
285 |
// we create a queue to give to both the reader and the |
286 |
// displayer |
287 |
Queue theQueue = new Queue(); |
288 |
_dataReader = new DataReader(_dataInBound, theQueue); |
289 |
_data.setQueue(theQueue); |
290 |
_data.cleanUpTabs(); |
291 |
|
292 |
// start the data rocking |
293 |
new Thread(_data).start(); |
294 |
_dataReader.start(); |
295 |
// finished for us.... |
296 |
} catch (IOException e) { |
297 |
// print the error and tidy up what's left |
298 |
Conient.addMessage("ERROR{data link}: " + e); |
299 |
_dataLink = null; |
300 |
// and the firewall handler if there is one |
301 |
closeFirewall(_dataFirewallProcess); |
302 |
_actionQueue.clearQueue(_myQueue); |
303 |
Conient.setDataStatus("Disconnected"); |
304 |
} |
305 |
} |
306 |
} else { |
307 |
Conient.addMessage("WARNING{data link}: already established"); |
308 |
} |
309 |
break; |
310 |
case STOPDATA: |
311 |
if(_dataLink != null) { |
312 |
try { |
313 |
String response; |
314 |
// shut down the data link |
315 |
Conient.setDataStatus("Disconnecting - " + _server); |
316 |
|
317 |
// close the reader |
318 |
_dataReader.shutdown(); |
319 |
// wait for it to close |
320 |
boolean dirtyShutdown = true; |
321 |
long startTime = System.currentTimeMillis(); |
322 |
while((System.currentTimeMillis() - startTime) < (DATAREADER_SHUTDOWN_TIMEOUT * 1000)) { |
323 |
if (!_dataReader.isAlive()) { |
324 |
dirtyShutdown = false; |
325 |
break; |
326 |
} |
327 |
} |
328 |
// warn if it didn't shutdown in time |
329 |
if (dirtyShutdown) { |
330 |
Conient.addMessage("WARNING{data link}: data reader thread did not close within timeout, killing its IO anyway!"); |
331 |
} |
332 |
|
333 |
// tell the server |
334 |
_outBound.println("STOPDATA"); |
335 |
_outBound.flush(); |
336 |
response = _inBound.readLine(); |
337 |
|
338 |
// check the server was ok with our request... |
339 |
// even if it wasn't we will go anyway! |
340 |
if (!response.equals("OK")) { |
341 |
throw new IOException("server didn't OK request to stop data channel - stopping anyway"); |
342 |
} |
343 |
|
344 |
|
345 |
// close the lot down |
346 |
_dataInBound.close(); |
347 |
_dataOutBound.close(); |
348 |
_dataLink.close(); |
349 |
// get rid of the socket |
350 |
_dataLink = null; |
351 |
|
352 |
// and the firewall handler if there is one |
353 |
closeFirewall(_dataFirewallProcess); |
354 |
|
355 |
Conient.setDataStatus("Disconnected"); |
356 |
} catch (IOException e) { |
357 |
// print the error and tidy up what's left |
358 |
Conient.addMessage("ERROR{data link}: " + e); |
359 |
try { |
360 |
_dataOutBound.close(); |
361 |
_dataInBound.close(); |
362 |
_dataLink.close(); |
363 |
// and the firewall handler if there is one |
364 |
closeFirewall(_dataFirewallProcess); |
365 |
} catch (IOException e2) { |
366 |
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
367 |
} |
368 |
_dataLink = null; |
369 |
_actionQueue.clearQueue(_myQueue); |
370 |
Conient.setDataStatus("Disconnected"); |
371 |
} |
372 |
} else { |
373 |
Conient.addMessage("WARNING{data link}: already disconnected"); |
374 |
} |
375 |
break; |
376 |
case DISCONNECT: |
377 |
if (_controlLink != null) { |
378 |
if (_dataLink != null) { |
379 |
// we want to tell ourselves to stop it |
380 |
Conient.addMessage("WARNING{control link}: data link not disconnected - queueing stop events"); |
381 |
_actionQueue.add(new Integer(STOPDATA)); |
382 |
_actionQueue.add(new Integer(DISCONNECT)); |
383 |
} else { |
384 |
try { |
385 |
// request the server to disconnect |
386 |
String response; |
387 |
_outBound.println("DISCONNECT"); |
388 |
_outBound.flush(); |
389 |
response = _inBound.readLine(); |
390 |
|
391 |
// check the server was ok with our request... |
392 |
// even if it wasn't we will go anyway! |
393 |
if (!response.equals("OK")) { |
394 |
throw new IOException("server didn't OK request to stop control channel - stopping anyway"); |
395 |
} |
396 |
|
397 |
// then lets shutdown the link |
398 |
Conient.setControlStatus("Disconnecting - " + _server); |
399 |
_inBound.close(); |
400 |
_outBound.close(); |
401 |
_controlLink.close(); |
402 |
// for good measure |
403 |
_controlLink = null; |
404 |
|
405 |
// and the firewall handler if there is one |
406 |
closeFirewall(_controlFirewallProcess); |
407 |
|
408 |
Conient.setControlStatus("Disconnected"); |
409 |
} catch (IOException e) { |
410 |
Conient.addMessage("ERROR{control link}: " + e); |
411 |
try { |
412 |
_inBound.close(); |
413 |
_outBound.close(); |
414 |
_controlLink.close(); |
415 |
// and the firewall handler if there is one |
416 |
closeFirewall(_controlFirewallProcess); |
417 |
} catch (IOException e2) { |
418 |
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
419 |
} |
420 |
_controlLink = null; |
421 |
_actionQueue.clearQueue(_myQueue); |
422 |
Conient.setControlStatus("Disconnected"); |
423 |
} |
424 |
} |
425 |
} else { |
426 |
Conient.addMessage("WARNING{control link}: already disconnected"); |
427 |
} |
428 |
break; |
429 |
case QUIT: |
430 |
Conient.addMessage("Exiting."); |
431 |
try { |
432 |
// stop data and control if data up |
433 |
if (_dataLink != null) { |
434 |
_actionQueue.add(new Integer(STOPDATA)); |
435 |
_actionQueue.add(new Integer(DISCONNECT)); |
436 |
_actionQueue.add(new Integer(QUIT)); |
437 |
throw new IOException(); |
438 |
} |
439 |
// stop control |
440 |
if (_controlLink != null) { |
441 |
_actionQueue.add(new Integer(DISCONNECT)); |
442 |
_actionQueue.add(new Integer(QUIT)); |
443 |
throw new IOException(); |
444 |
} |
445 |
Conient.addMessage("Finished."); |
446 |
// go! |
447 |
System.exit(0); |
448 |
} catch (IOException e) { |
449 |
Conient.addMessage("WARNING: open connections detected - queueing stop events"); |
450 |
} |
451 |
break; |
452 |
case GETCONFIGURATION: |
453 |
getConfigFromServer(); |
454 |
break; |
455 |
} |
456 |
} |
457 |
} |
458 |
|
459 |
/** |
460 |
* This method allows other classes |
461 |
* to shutdown this connection handler. |
462 |
*/ |
463 |
public void shutdown() { |
464 |
_running = false; |
465 |
} |
466 |
|
467 |
//---PRIVATE METHODS--- |
468 |
|
469 |
/** |
470 |
* This method performs the STARTCONFIG command on |
471 |
* the server. this method is called after a CONNECT, |
472 |
* and when a GETCONFIGURATION command is called. |
473 |
*/ |
474 |
private void getConfigFromServer() { |
475 |
if(_controlLink != null) { |
476 |
try { |
477 |
String response = null; |
478 |
_outBound.println("STARTCONFIG"); |
479 |
_outBound.flush(); |
480 |
response = _inBound.readLine(); |
481 |
if (!response.equals("OK")) { |
482 |
throw new IOException("server refused (" + response + ")"); |
483 |
} |
484 |
_configuration.readServerConfiguration(_inBound, _outBound); |
485 |
_outBound.println("ENDCONFIG"); |
486 |
_outBound.flush(); |
487 |
response = _inBound.readLine(); |
488 |
if (!response.equals("OK")) { |
489 |
throw new IOException("server reported error when finishing configuration"); |
490 |
} |
491 |
} catch (IOException e) { |
492 |
Conient.addMessage("ERROR{control link}: when getting configuration - " + e); |
493 |
} |
494 |
} |
495 |
} |
496 |
|
497 |
/** |
498 |
* Handles opening pipes through firewalls. |
499 |
* It checks the configuration for various entries |
500 |
* to set up the link or not. |
501 |
* |
502 |
* If a link is setup it will return the name of the |
503 |
* new server to connect to, if a link is NOT setup, |
504 |
* it will simply return the original server name. |
505 |
* |
506 |
* The name of the machine that the pipe is setup on |
507 |
* defaults to "localhost", unless the configuration |
508 |
* specifies otherwise. |
509 |
* |
510 |
* Once it has run the firewall command it then waits |
511 |
* a set period according to the config for the firewall |
512 |
* pipe to be set up. |
513 |
* |
514 |
* The firewall process should be destroyed when the |
515 |
* link is finished with. |
516 |
* |
517 |
* @param server the name of the server to open up the pipe to |
518 |
* @param port the port number to open up the pipe to |
519 |
* @param firewallProcess the holder for the new firewall process |
520 |
* @return the server to connect to, as determined by this routine |
521 |
*/ |
522 |
private String handleFirewall(String server, int port, Process firewallProcess) { |
523 |
String firewallCommand = _configuration.getProperty("firewall.command"); |
524 |
String firewallCommandWait = _configuration.getProperty("firewall.commandwait"); |
525 |
String firewallServer = _configuration.getProperty("firewall.server"); |
526 |
// if we are running firewall support...then lets start it |
527 |
if (firewallCommand != null) { |
528 |
// clean up the command with what we want |
529 |
firewallCommand = replaceText(firewallCommand, "%PORT%", new Integer(port).toString()); |
530 |
firewallCommand = replaceText(firewallCommand, "%SERVER%", server); |
531 |
Conient.addMessage("WARNING{firewall}: firewall pipes requested, running pipe setup command \"" + firewallCommand + "\""); |
532 |
try { |
533 |
// run the command |
534 |
firewallProcess = Runtime.getRuntime().exec(firewallCommand); |
535 |
|
536 |
// work out how long we should wait before carrying on |
537 |
int time = 0; |
538 |
try { |
539 |
time = Integer.parseInt(firewallCommandWait); |
540 |
} catch (NumberFormatException e) { |
541 |
time = 0; |
542 |
} |
543 |
if (time == 0) { |
544 |
time = DEFAULT_FIREWALL_COMMANDWAIT; |
545 |
} |
546 |
Conient.addMessage("WARNING{firewall}: waiting " + time + " seconds for command to complete!"); |
547 |
// wait for the command to finish |
548 |
try { |
549 |
Thread.sleep(time * 1000); |
550 |
} catch (InterruptedException e) { |
551 |
} |
552 |
|
553 |
// set the server we want to return |
554 |
server = firewallServer; |
555 |
if (server == null) { |
556 |
server = DEFAULT_FIREWALL_SERVER; |
557 |
} |
558 |
} catch (IOException e) { |
559 |
Conient.addMessage("ERROR{firewall}: unable to start pipe to i-scream server"); |
560 |
} |
561 |
} |
562 |
return server; |
563 |
} |
564 |
|
565 |
/** |
566 |
* Checks to see if the given firewall process |
567 |
* has been created. If it has it calls destroy() |
568 |
* on it. |
569 |
* |
570 |
* @param firewallProcess the process to check |
571 |
*/ |
572 |
private void closeFirewall(Process firewallProcess) { |
573 |
if (firewallProcess != null) { |
574 |
firewallProcess.destroy(); |
575 |
firewallProcess = null; |
576 |
Conient.addMessage("WARNING{firewall}: firewall process destroyed"); |
577 |
} |
578 |
} |
579 |
|
580 |
/** |
581 |
* Searches a string and replaces all occurences |
582 |
* of the given search text with the given replacement |
583 |
* text. |
584 |
* |
585 |
* @param text the text to search and replace in |
586 |
* @param search the string to look for and replace |
587 |
* @param replace the text to replace with |
588 |
* @return the updated version of text |
589 |
*/ |
590 |
private String replaceText(String text, String search, String replace) { |
591 |
StringBuffer textBuffer = new StringBuffer(text); |
592 |
int currIndex = 0; |
593 |
currIndex = text.indexOf(search, currIndex); |
594 |
while(currIndex != -1) { |
595 |
if (currIndex != -1) { |
596 |
textBuffer.delete(currIndex, currIndex + search.length()); |
597 |
textBuffer.insert(currIndex, replace); |
598 |
} |
599 |
text = textBuffer.toString(); |
600 |
currIndex = text.indexOf(search, currIndex + search.length()); |
601 |
} |
602 |
return new String(textBuffer); |
603 |
} |
604 |
//---ACCESSOR/MUTATOR METHODS--- |
605 |
|
606 |
//---ATTRIBUTES--- |
607 |
|
608 |
/** |
609 |
* The state if this thread |
610 |
*/ |
611 |
private boolean _running = true; |
612 |
|
613 |
/** |
614 |
* A reference to the displaying class DataPanel |
615 |
*/ |
616 |
private DataPanel _data; |
617 |
|
618 |
/** |
619 |
* The queue that actions are added to by other parts of the system |
620 |
*/ |
621 |
private Queue _actionQueue; |
622 |
|
623 |
/** |
624 |
* The queue number that we are reading from on the action queue |
625 |
*/ |
626 |
private int _myQueue; |
627 |
|
628 |
/** |
629 |
* The control link socket |
630 |
*/ |
631 |
private Socket _controlLink; |
632 |
|
633 |
/** |
634 |
* The data link socket |
635 |
*/ |
636 |
private Socket _dataLink; |
637 |
|
638 |
/** |
639 |
* The input for the control link |
640 |
*/ |
641 |
private BufferedReader _inBound; |
642 |
|
643 |
/** |
644 |
* The output for the control link |
645 |
*/ |
646 |
private PrintWriter _outBound; |
647 |
|
648 |
/** |
649 |
* The input for the data link |
650 |
*/ |
651 |
private BufferedReader _dataInBound; |
652 |
|
653 |
/** |
654 |
* The output for the data link |
655 |
*/ |
656 |
private PrintWriter _dataOutBound; |
657 |
|
658 |
/** |
659 |
* A reference to the DataReader in use |
660 |
*/ |
661 |
private DataReader _dataReader; |
662 |
|
663 |
/** |
664 |
* A reference to the system configuration component |
665 |
*/ |
666 |
private Configuration _configuration = Configuration.getInstance(); |
667 |
|
668 |
/** |
669 |
* The server we will be connecting to |
670 |
*/ |
671 |
private String _server = null; |
672 |
|
673 |
/** |
674 |
* The server that the config says we should connect to |
675 |
*/ |
676 |
private String _configuredServer = null; |
677 |
|
678 |
/** |
679 |
* The process used to start the firewall pipe |
680 |
* for the control link. |
681 |
*/ |
682 |
private Process _controlFirewallProcess = null; |
683 |
|
684 |
/** |
685 |
* The process used to start the firewall pipe |
686 |
* for the data link. |
687 |
*/ |
688 |
private Process _dataFirewallProcess = null; |
689 |
|
690 |
//---STATIC ATTRIBUTES--- |
691 |
|
692 |
} |