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.*; |
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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 |
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* there, it then performs those actions. |
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* |
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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 1.13 2001/01/30 02:12:51 ajm4 Exp $ |
21 |
*/ |
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public class ConnectionHandler extends Thread { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
29 |
public final String REVISION = "$Revision: 1.13 $"; |
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 |
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*/ |
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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 |
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*/ |
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public static final String DEFAULT_FIREWALL_SERVER = "localhost"; |
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|
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/** |
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* The default time in seconds to wait for the |
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* 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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|
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//---CONSTRUCTORS--- |
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|
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/** |
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* 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 |
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* 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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*/ |
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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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} |
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if(_configuration.getProperty("data.onstartconnect") != null) { |
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_actionQueue.add(new Integer(STARTDATA)); |
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} |
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while(_running) { |
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// we wait for a call... |
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int action = 0; |
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try { |
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action = ((Integer) _actionQueue.get(_myQueue)).intValue(); |
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} 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!"); |
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} |
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|
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// examine our action... |
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// if it was to connect...then we connect... |
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switch(action) { |
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case CONNECT: |
168 |
if (_controlLink == null) { |
169 |
try { |
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// get the server name from the config |
171 |
_configuredServer = _configuration.getProperty("control.server"); |
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|
173 |
if (_configuredServer == null) { |
174 |
throw new IOException("no i-scream server in current configuration"); |
175 |
} |
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|
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// open the socket to the server and bind the IO |
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// get the port from the config |
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String portString = _configuration.getProperty("control.port"); |
180 |
if (portString == null) { |
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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 |
} |
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|
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// start firewall if needed |
191 |
_server = handleFirewall(_configuredServer, port, _controlFirewallProcess); |
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|
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); |
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|
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String response; |
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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 |
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if (!(Double.parseDouble(response.substring(10, response.length())) > PROTOCOL_VERSION)) { |
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Conient.addMessage("WARNING{control link}: server is using a newer protocol (" + response + "), please update your client, continuing with old protocol (PROTOCOL " + PROTOCOL_VERSION + ")" ); |
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} 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 |
} |
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|
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// 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")); |
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} |
221 |
// get the config...we are connected now! |
222 |
_actionQueue.add(new Integer(GETCONFIGURATION)); |
223 |
} catch (IOException e) { |
224 |
// print the error and tidy up what's left |
225 |
Conient.addMessage("ERROR{control link}: " + e); |
226 |
_controlLink = null; |
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// and the firewall handler if there is one |
228 |
if (_controlFirewallProcess != null) { |
229 |
_controlFirewallProcess.destroy(); |
230 |
_controlFirewallProcess = null; |
231 |
} |
232 |
_actionQueue.clearQueue(_myQueue); |
233 |
Conient.setControlStatus("Disconnected"); |
234 |
} |
235 |
} else { |
236 |
Conient.addMessage("WARNING{control link}: already established"); |
237 |
} |
238 |
break; |
239 |
case STARTDATA: |
240 |
// as long as the data link hasn't been established |
241 |
// we want to establish it |
242 |
if (_dataLink == null) { |
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// check that the control link is open, if it isn't we |
244 |
// might want to sort that problemo out |
245 |
// we do this by simply queueing the event to occour, then |
246 |
// this event to run again ;-) |
247 |
if(_controlLink == null) { |
248 |
Conient.addMessage("WARNING{data link}: control link not established - queueing start events"); |
249 |
_actionQueue.add(new Integer(CONNECT)); |
250 |
_actionQueue.add(new Integer(STARTDATA)); |
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} else { |
252 |
try { |
253 |
|
254 |
// ask the server to start the data link |
255 |
String response; |
256 |
_outBound.println("STARTDATA"); |
257 |
_outBound.flush(); |
258 |
response = _inBound.readLine(); |
259 |
|
260 |
// see if the server suggested a good port |
261 |
if (response.equals("ERROR")) { |
262 |
throw new IOException("server unable to start data link at this time"); |
263 |
} |
264 |
int port = 0; |
265 |
try { |
266 |
port = Integer.parseInt(response); |
267 |
} catch (NumberFormatException e) { |
268 |
throw new IOException("invalid data port suggested by server - " + response); |
269 |
} |
270 |
|
271 |
// start firewall if needed |
272 |
_server = handleFirewall(_configuredServer, port, _dataFirewallProcess); |
273 |
Conient.setDataStatus("Connecting to - " + _server + ":" + response); |
274 |
|
275 |
_dataLink = new Socket(_server, port); |
276 |
|
277 |
response = _inBound.readLine(); |
278 |
if (!response.equals("OK")) { |
279 |
throw new IOException("server reported error establishing data channel"); |
280 |
} |
281 |
|
282 |
// if the socket was ok, then we attack our IO hooks |
283 |
_dataInBound = new BufferedReader(new InputStreamReader(_dataLink.getInputStream())); |
284 |
_dataOutBound = new PrintWriter(_dataLink.getOutputStream()); |
285 |
Conient.setDataStatus("Connection Established - " + _server); |
286 |
} catch (IOException e) { |
287 |
// print the error and tidy up what's left |
288 |
Conient.addMessage("ERROR{data link}: " + e); |
289 |
_dataLink = null; |
290 |
_actionQueue.clearQueue(_myQueue); |
291 |
// and the firewall handler if there is one |
292 |
if (_dataFirewallProcess != null) { |
293 |
_dataFirewallProcess.destroy(); |
294 |
_dataFirewallProcess = null; |
295 |
} |
296 |
Conient.setDataStatus("Disconnected"); |
297 |
} |
298 |
// now we want to start reading the data in |
299 |
// so we start the appropriate components on their way |
300 |
// we create a queue to give to both the reader and the |
301 |
// displayer |
302 |
Queue theQueue = new Queue(); |
303 |
_dataReader = new DataReader(_dataInBound, theQueue); |
304 |
_data.setQueue(theQueue); |
305 |
_data.cleanUpTabs(); |
306 |
|
307 |
// start the data rocking |
308 |
new Thread(_data).start(); |
309 |
_dataReader.start(); |
310 |
// finished for us.... |
311 |
} |
312 |
} else { |
313 |
Conient.addMessage("WARNING{data link}: already established"); |
314 |
} |
315 |
break; |
316 |
case STOPDATA: |
317 |
if(_dataLink != null) { |
318 |
try { |
319 |
String response; |
320 |
// shut down the data link |
321 |
Conient.setDataStatus("Disconnecting - " + _server); |
322 |
|
323 |
// close the reader |
324 |
_dataReader.shutdown(); |
325 |
// wait for it to close |
326 |
boolean dirtyShutdown = true; |
327 |
long startTime = System.currentTimeMillis(); |
328 |
while((System.currentTimeMillis() - startTime) < (DATAREADER_SHUTDOWN_TIMEOUT * 1000)) { |
329 |
if (!_dataReader.isAlive()) { |
330 |
dirtyShutdown = false; |
331 |
break; |
332 |
} |
333 |
} |
334 |
// warn if it didn't shutdown in time |
335 |
if (dirtyShutdown) { |
336 |
Conient.addMessage("WARNING{data link}: data reader thread did not close within timeout, killing its IO anyway!"); |
337 |
} |
338 |
|
339 |
// tell the server |
340 |
_outBound.println("STOPDATA"); |
341 |
_outBound.flush(); |
342 |
response = _inBound.readLine(); |
343 |
|
344 |
// check the server was ok with our request... |
345 |
// even if it wasn't we will go anyway! |
346 |
if (!response.equals("OK")) { |
347 |
throw new IOException("server didn't OK request to stop data channel - stopping anyway"); |
348 |
} |
349 |
|
350 |
|
351 |
// close the lot down |
352 |
_dataInBound.close(); |
353 |
_dataOutBound.close(); |
354 |
_dataLink.close(); |
355 |
// get rid of the socket |
356 |
_dataLink = null; |
357 |
|
358 |
// and the firewall handler if there is one |
359 |
if (_dataFirewallProcess != null) { |
360 |
_dataFirewallProcess.destroy(); |
361 |
_dataFirewallProcess = null; |
362 |
} |
363 |
|
364 |
Conient.setDataStatus("Disconnected"); |
365 |
} catch (IOException e) { |
366 |
// print the error and tidy up what's left |
367 |
Conient.addMessage("ERROR{data link}: " + e); |
368 |
try { |
369 |
_dataOutBound.close(); |
370 |
_dataInBound.close(); |
371 |
_dataLink.close(); |
372 |
// and the firewall handler if there is one |
373 |
if (_dataFirewallProcess != null) { |
374 |
_dataFirewallProcess.destroy(); |
375 |
_dataFirewallProcess = null; |
376 |
} |
377 |
} catch (IOException e2) { |
378 |
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
379 |
} |
380 |
_dataLink = null; |
381 |
_actionQueue.clearQueue(_myQueue); |
382 |
Conient.setDataStatus("Disconnected"); |
383 |
} |
384 |
} else { |
385 |
Conient.addMessage("WARNING{data link}: already disconnected"); |
386 |
} |
387 |
break; |
388 |
case DISCONNECT: |
389 |
if (_controlLink != null) { |
390 |
if (_dataLink != null) { |
391 |
// we want to tell ourselves to stop it |
392 |
Conient.addMessage("WARNING{control link}: data link not disconnected - queueing stop events"); |
393 |
_actionQueue.add(new Integer(STOPDATA)); |
394 |
_actionQueue.add(new Integer(DISCONNECT)); |
395 |
} else { |
396 |
try { |
397 |
// request the server to disconnect |
398 |
String response; |
399 |
_outBound.println("DISCONNECT"); |
400 |
_outBound.flush(); |
401 |
response = _inBound.readLine(); |
402 |
|
403 |
// check the server was ok with our request... |
404 |
// even if it wasn't we will go anyway! |
405 |
if (!response.equals("OK")) { |
406 |
throw new IOException("server didn't OK request to stop control channel - stopping anyway"); |
407 |
} |
408 |
|
409 |
// then lets shutdown the link |
410 |
Conient.setControlStatus("Disconnecting - " + _server); |
411 |
_inBound.close(); |
412 |
_outBound.close(); |
413 |
_controlLink.close(); |
414 |
// for good measure |
415 |
_controlLink = null; |
416 |
|
417 |
// and the firewall handler if there is one |
418 |
if (_controlFirewallProcess != null) { |
419 |
_controlFirewallProcess.destroy(); |
420 |
_controlFirewallProcess = null; |
421 |
} |
422 |
|
423 |
Conient.setControlStatus("Disconnected"); |
424 |
} catch (IOException e) { |
425 |
Conient.addMessage("ERROR{control link}: " + e); |
426 |
try { |
427 |
_inBound.close(); |
428 |
_outBound.close(); |
429 |
_controlLink.close(); |
430 |
// and the firewall handler if there is one |
431 |
if (_controlFirewallProcess != null) { |
432 |
_controlFirewallProcess.destroy(); |
433 |
_controlFirewallProcess = null; |
434 |
} |
435 |
} catch (IOException e2) { |
436 |
Conient.addMessage("CRITICAL{control link}: unable to close socket - " + e2); |
437 |
} |
438 |
_controlLink = null; |
439 |
_actionQueue.clearQueue(_myQueue); |
440 |
Conient.setControlStatus("Disconnected"); |
441 |
} |
442 |
} |
443 |
} else { |
444 |
Conient.addMessage("WARNING{control link}: already disconnected"); |
445 |
} |
446 |
break; |
447 |
case QUIT: |
448 |
Conient.addMessage("Exiting."); |
449 |
try { |
450 |
// stop data and control if data up |
451 |
if (_dataLink != null) { |
452 |
_actionQueue.add(new Integer(STOPDATA)); |
453 |
_actionQueue.add(new Integer(DISCONNECT)); |
454 |
_actionQueue.add(new Integer(QUIT)); |
455 |
throw new IOException(); |
456 |
} |
457 |
// stop control |
458 |
if (_controlLink != null) { |
459 |
_actionQueue.add(new Integer(DISCONNECT)); |
460 |
_actionQueue.add(new Integer(QUIT)); |
461 |
throw new IOException(); |
462 |
} |
463 |
Conient.addMessage("Finished."); |
464 |
// go! |
465 |
System.exit(0); |
466 |
} catch (IOException e) { |
467 |
Conient.addMessage("WARNING: open connections detected - queueing stop events"); |
468 |
} |
469 |
break; |
470 |
case GETCONFIGURATION: |
471 |
if(_controlLink != null) { |
472 |
try { |
473 |
String response = null; |
474 |
_outBound.println("STARTCONFIG"); |
475 |
_outBound.flush(); |
476 |
response = _inBound.readLine(); |
477 |
if (!response.equals("OK")) { |
478 |
throw new IOException("server refused (" + response + ")"); |
479 |
} |
480 |
_configuration.readServerConfiguration(_inBound, _outBound); |
481 |
_outBound.println("ENDCONFIG"); |
482 |
_outBound.flush(); |
483 |
response = _inBound.readLine(); |
484 |
if (!response.equals("OK")) { |
485 |
throw new IOException("server reported error when finishing configuration"); |
486 |
} |
487 |
} catch (IOException e) { |
488 |
Conient.addMessage("ERROR{control link}: when getting configuration - " + e); |
489 |
} |
490 |
} |
491 |
break; |
492 |
} |
493 |
} |
494 |
} |
495 |
|
496 |
/** |
497 |
* This method allows other classes |
498 |
* to shutdown this connection handler. |
499 |
*/ |
500 |
public void shutdown() { |
501 |
_running = false; |
502 |
} |
503 |
|
504 |
//---PRIVATE METHODS--- |
505 |
|
506 |
/** |
507 |
* Handles opening pipes through firewalls. |
508 |
* It checks the configuration for various entries |
509 |
* to set up the link or not. |
510 |
* |
511 |
* If a link is setup it will return the name of the |
512 |
* new server to connect to, if a link is NOT setup, |
513 |
* it will simply return the original server name. |
514 |
* |
515 |
* The name of the machine that the pipe is setup on |
516 |
* defaults to "localhost", unless the configuration |
517 |
* specifies otherwise. |
518 |
* |
519 |
* Once it has run the firewall command it then waits |
520 |
* a set period according to the config for the firewall |
521 |
* pipe to be set up. |
522 |
* |
523 |
* The firewall process should be destroyed when the |
524 |
* link is finished with. |
525 |
* |
526 |
* @param server the name of the server to open up the pipe to |
527 |
* @param port the port number to open up the pipe to |
528 |
* @param firewallProcess the holder for the new firewall process |
529 |
* @return the server to connect to, as determined by this routine |
530 |
*/ |
531 |
private String handleFirewall(String server, int port, Process firewallProcess) { |
532 |
String firewallCommand = _configuration.getProperty("firewall.command"); |
533 |
String firewallCommandWait = _configuration.getProperty("firewall.commandwait"); |
534 |
String firewallServer = _configuration.getProperty("firewall.server"); |
535 |
// if we are running firewall support...then lets start it |
536 |
if (firewallCommand != null) { |
537 |
// clean up the command with what we want |
538 |
firewallCommand = replaceText(firewallCommand, "%PORT%", new Integer(port).toString()); |
539 |
firewallCommand = replaceText(firewallCommand, "%SERVER%", server); |
540 |
Conient.addMessage("WARNING{firewall}: firewall pipes requested, running pipe setup command \"" + firewallCommand + "\""); |
541 |
try { |
542 |
// run the command |
543 |
firewallProcess = Runtime.getRuntime().exec(firewallCommand); |
544 |
|
545 |
// work out how long we should wait before carrying on |
546 |
int time = 0; |
547 |
try { |
548 |
time = Integer.parseInt(firewallCommandWait); |
549 |
} catch (NumberFormatException e) { |
550 |
time = 0; |
551 |
} |
552 |
if (time == 0) { |
553 |
time = DEFAULT_FIREWALL_COMMANDWAIT; |
554 |
} |
555 |
Conient.addMessage("WARNING{firewall}: waiting " + time + " seconds for command to complete!"); |
556 |
// wait for the command to finish |
557 |
try { |
558 |
Thread.sleep(time * 1000); |
559 |
} catch (InterruptedException e) { |
560 |
} |
561 |
|
562 |
// set the server we want to return |
563 |
server = firewallServer; |
564 |
if (server == null) { |
565 |
server = DEFAULT_FIREWALL_SERVER; |
566 |
} |
567 |
} catch (IOException e) { |
568 |
Conient.addMessage("ERROR{firewall}: unable to start pipe to i-scream server"); |
569 |
} |
570 |
} |
571 |
return server; |
572 |
} |
573 |
|
574 |
/** |
575 |
* Searches a string and replaces all occurences |
576 |
* of the given search text with the given replacement |
577 |
* text. |
578 |
* |
579 |
* @param text the text to search and replace in |
580 |
* @param search the string to look for and replace |
581 |
* @param replace the text to replace with |
582 |
* @return the updated version of text |
583 |
*/ |
584 |
private String replaceText(String text, String search, String replace) { |
585 |
StringBuffer textBuffer = new StringBuffer(text); |
586 |
int currIndex = 0; |
587 |
currIndex = text.indexOf(search, currIndex); |
588 |
while(currIndex != -1) { |
589 |
if (currIndex != -1) { |
590 |
textBuffer.delete(currIndex, currIndex + search.length()); |
591 |
textBuffer.insert(currIndex, replace); |
592 |
} |
593 |
text = textBuffer.toString(); |
594 |
currIndex = text.indexOf(search, currIndex + search.length()); |
595 |
} |
596 |
return new String(textBuffer); |
597 |
} |
598 |
//---ACCESSOR/MUTATOR METHODS--- |
599 |
|
600 |
//---ATTRIBUTES--- |
601 |
|
602 |
/** |
603 |
* The state if this thread |
604 |
*/ |
605 |
private boolean _running = true; |
606 |
|
607 |
/** |
608 |
* A reference to the displaying class DataPanel |
609 |
*/ |
610 |
private DataPanel _data; |
611 |
|
612 |
/** |
613 |
* The queue that actions are added to by other parts of the system |
614 |
*/ |
615 |
private Queue _actionQueue; |
616 |
|
617 |
/** |
618 |
* The queue number that we are reading from on the action queue |
619 |
*/ |
620 |
private int _myQueue; |
621 |
|
622 |
/** |
623 |
* The control link socket |
624 |
*/ |
625 |
private Socket _controlLink; |
626 |
|
627 |
/** |
628 |
* The data link socket |
629 |
*/ |
630 |
private Socket _dataLink; |
631 |
|
632 |
/** |
633 |
* The input for the control link |
634 |
*/ |
635 |
private BufferedReader _inBound; |
636 |
|
637 |
/** |
638 |
* The output for the control link |
639 |
*/ |
640 |
private PrintWriter _outBound; |
641 |
|
642 |
/** |
643 |
* The input for the data link |
644 |
*/ |
645 |
private BufferedReader _dataInBound; |
646 |
|
647 |
/** |
648 |
* The output for the data link |
649 |
*/ |
650 |
private PrintWriter _dataOutBound; |
651 |
|
652 |
/** |
653 |
* A reference to the DataReader in use |
654 |
*/ |
655 |
private DataReader _dataReader; |
656 |
|
657 |
/** |
658 |
* A reference to the system configuration component |
659 |
*/ |
660 |
private Configuration _configuration = Configuration.getInstance(); |
661 |
|
662 |
/** |
663 |
* The server we will be connecting to |
664 |
*/ |
665 |
private String _server = null; |
666 |
|
667 |
/** |
668 |
* The server that the config says we should connect to |
669 |
*/ |
670 |
private String _configuredServer = null; |
671 |
|
672 |
/** |
673 |
* The process used to start the firewall pipe |
674 |
* for the control link. |
675 |
*/ |
676 |
private Process _controlFirewallProcess = null; |
677 |
|
678 |
/** |
679 |
* The process used to start the firewall pipe |
680 |
* for the data link. |
681 |
*/ |
682 |
private Process _dataFirewallProcess = null; |
683 |
|
684 |
//---STATIC ATTRIBUTES--- |
685 |
|
686 |
} |