| 9 |
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| 10 |
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| 11 |
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/** |
| 12 |
< |
* Acts as a Handler to a CORBA based client. |
| 12 |
> |
* Acts as a Control Handler to a CORBA based client. |
| 13 |
|
* |
| 14 |
|
* !!! FUNDAMENTAL DESIGN PROBLEM !!! |
| 15 |
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* !!! Need a way to "shutdown" this class !!! |
| 17 |
|
* @author $Author$ |
| 18 |
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* @version $Id$ |
| 19 |
|
*/ |
| 20 |
< |
class CorbaHandlerServant extends Thread implements CorbaHandlerOperations { |
| 20 |
> |
class CorbaControlHandlerServant extends CorbaControlHandlerPOA { |
| 21 |
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|
| 22 |
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//---FINAL ATTRIBUTES--- |
| 23 |
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|
| 31 |
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//---CONSTRUCTORS--- |
| 32 |
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| 33 |
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/** |
| 34 |
< |
* Construct a new CorbaHandlerServant. |
| 34 |
> |
* Construct a new CorbaControlHandlerServant. |
| 35 |
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* |
| 36 |
|
* @param packetSorter A reference to the PacketSorter in the component |
| 37 |
– |
* @param name The name of the client |
| 37 |
|
* @param client A reference to the "servant" part of the connecting client. |
| 38 |
+ |
* @param queueMonitorInterval The interval at which to monitor our Queue. |
| 39 |
+ |
* @param clientname A name to identify the client. |
| 40 |
|
*/ |
| 41 |
< |
public CorbaHandlerServant(PacketSorter packetSorter, String name, Client client) { |
| 41 |
> |
public CorbaControlHandlerServant(PacketSorter packetSorter, Client client, int queueMonitorInterval, String clientname) { |
| 42 |
|
_packetSorter = packetSorter; |
| 43 |
< |
_clientName = name; |
| 43 |
> |
_queueMonitorInterval = queueMonitorInterval; |
| 44 |
|
_hostList = ""; |
| 44 |
– |
_queue = new Queue(); |
| 45 |
|
_client = client; |
| 46 |
+ |
_clientname = clientname; |
| 47 |
+ |
_dataHandler = null; |
| 48 |
|
_logger.write(toString(), Logger.SYSINIT, "created"); |
| 49 |
|
} |
| 50 |
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|
| 51 |
|
//---PUBLIC METHODS--- |
| 52 |
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|
| 53 |
|
/** |
| 52 |
– |
* This method loops round until we "shutdown" (not implemented yet). Inside |
| 53 |
– |
* the main loop we will first wait until the startData() method is called, |
| 54 |
– |
* then we'll send data constantly until stopData() is called. |
| 55 |
– |
*/ |
| 56 |
– |
public void run() { |
| 57 |
– |
// !!! OUGHT TO CHECK QUEUE START OF USE !!! |
| 58 |
– |
// get a queue |
| 59 |
– |
_queueID = _queue.getQueue(); |
| 60 |
– |
// we'll keep going until someone implements a "shutdown" :) |
| 61 |
– |
run = true; |
| 62 |
– |
while(run) { |
| 63 |
– |
// initially lock until someone tells us to start |
| 64 |
– |
synchronized(this) { |
| 65 |
– |
try { wait(); } catch(Exception e) {} |
| 66 |
– |
} |
| 67 |
– |
// loop sending data |
| 68 |
– |
while(_sendingData) { |
| 69 |
– |
try { |
| 70 |
– |
String xml = (String) _queue.get(_queueID); |
| 71 |
– |
// if it's not null (which could happen if we're "released") |
| 72 |
– |
// send it on to the client that we're connected to. |
| 73 |
– |
if(xml != null) { |
| 74 |
– |
_client.receiveXML(xml); |
| 75 |
– |
} |
| 76 |
– |
} |
| 77 |
– |
catch(InvalidQueueException e) { |
| 78 |
– |
// lets stop sending - maybe stop altogether ? |
| 79 |
– |
stopData(); |
| 80 |
– |
_logger.write(toString(), Logger.ERROR, "Queue failure: "+e); |
| 81 |
– |
} |
| 82 |
– |
} |
| 83 |
– |
// now, we've obviously been stopped, so we'll head back round this |
| 84 |
– |
// while loop until someone starts us again. |
| 85 |
– |
} |
| 86 |
– |
// if we get here we've been told to stop |
| 87 |
– |
_logger.write(toString(), Logger.SYSMSG, "Shutting Down"); |
| 88 |
– |
// remove ourselves from the queue |
| 89 |
– |
_queue.removeQueue(_queueID); |
| 90 |
– |
} |
| 91 |
– |
|
| 92 |
– |
/** |
| 54 |
|
* Start sending data to the client. |
| 55 |
|
* |
| 56 |
|
* @return a boolean stating whether the attempt to start succeeded |
| 57 |
|
*/ |
| 58 |
|
public boolean startData() { |
| 59 |
< |
if(!_sendingData) { |
| 59 |
> |
if(_dataHandler == null) { |
| 60 |
> |
// create a new DataHandler |
| 61 |
> |
CorbaDataHandler dh = new CorbaDataHandler(_client); |
| 62 |
|
// register the Queue |
| 63 |
< |
_packetSorter.register(_queue, _hostList); |
| 64 |
< |
// mark the running flag |
| 65 |
< |
_sendingData = true; |
| 66 |
< |
// bump the loop |
| 67 |
< |
synchronized(this) { |
| 68 |
< |
try { notifyAll(); } catch(Exception e) {} |
| 69 |
< |
} |
| 63 |
> |
_packetSorter.register(dh.getQueue(), _hostList); |
| 64 |
> |
// startup a monitor on the DataHandler's queue, every minute |
| 65 |
> |
String queueName = _name + " CorbaHandler:"+_clientname; |
| 66 |
> |
dh.getQueue().startMonitor(_queueMonitorInterval*1000, _packetSorter.getQueue(), queueName); |
| 67 |
> |
// start the DataHandler running |
| 68 |
> |
dh.start(); |
| 69 |
> |
// keep a reference |
| 70 |
> |
_dataHandler = dh; |
| 71 |
|
return true; |
| 72 |
|
} |
| 73 |
|
else { |
| 81 |
|
* @return a boolean stating whether the attempt to stop succeeded |
| 82 |
|
*/ |
| 83 |
|
public boolean stopData() { |
| 84 |
< |
if(_sendingData) { |
| 84 |
> |
if(_dataHandler != null) { |
| 85 |
|
// deregister the Queue |
| 86 |
< |
_packetSorter.deregister(_queue, _hostList); |
| 87 |
< |
// stop ourselves running |
| 88 |
< |
_sendingData = false; |
| 89 |
< |
// if the main loop is waiting for data it won't notice the |
| 90 |
< |
// above flag to stop. This bumps it out of the blocked get(). |
| 127 |
< |
_queue.releaseQueue(_queueID); |
| 86 |
> |
_packetSorter.deregister(_dataHandler.getQueue(), _hostList); |
| 87 |
> |
// stop the DataHandler |
| 88 |
> |
_dataHandler.shutdown(); |
| 89 |
> |
// destroy the reference |
| 90 |
> |
_dataHandler = null; |
| 91 |
|
return true; |
| 92 |
|
} |
| 93 |
|
else { |
| 103 |
|
* @return Whether the request succeeded. |
| 104 |
|
*/ |
| 105 |
|
public boolean setHostList(String hostList) { |
| 106 |
< |
if(!_sendingData) { |
| 106 |
> |
if(_dataHandler == null) { |
| 107 |
|
_hostList = hostList; |
| 108 |
|
return true; |
| 109 |
|
} |
| 152 |
|
private Logger _logger = ReferenceManager.getInstance().getLogger(); |
| 153 |
|
|
| 154 |
|
/** |
| 192 |
– |
* A reference to the Configuration Manager the system is using |
| 193 |
– |
*/ |
| 194 |
– |
private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM(); |
| 195 |
– |
|
| 196 |
– |
/** |
| 155 |
|
* A reference to the PacketSorter. |
| 156 |
|
*/ |
| 157 |
|
private PacketSorter _packetSorter; |
| 162 |
|
private String _hostList; |
| 163 |
|
|
| 164 |
|
/** |
| 165 |
< |
* The name of the connected client. |
| 165 |
> |
* The "servant" part of the client we're connected to. |
| 166 |
|
*/ |
| 167 |
< |
private String _clientName; |
| 167 |
> |
private Client _client; |
| 168 |
|
|
| 169 |
|
/** |
| 170 |
< |
* Whether we are active and sending data. |
| 170 |
> |
* A reference to our DataHandler, if we have one |
| 171 |
|
*/ |
| 172 |
< |
private boolean _sendingData; |
| 172 |
> |
private CorbaDataHandler _dataHandler; |
| 173 |
|
|
| 174 |
|
/** |
| 175 |
< |
* The Queue we'll use for buffering data to the client. |
| 175 |
> |
* The interval at which to monitor our Queue |
| 176 |
|
*/ |
| 177 |
< |
private Queue _queue; |
| 177 |
> |
private int _queueMonitorInterval; |
| 178 |
|
|
| 179 |
|
/** |
| 180 |
< |
* The "servant" part of the client we're connected to. |
| 180 |
> |
* A name to identify the client |
| 181 |
|
*/ |
| 182 |
< |
private Client _client; |
| 225 |
< |
|
| 226 |
< |
/** |
| 227 |
< |
* Our queue number within our Queue |
| 228 |
< |
*/ |
| 229 |
< |
private int _queueID; |
| 230 |
< |
|
| 231 |
< |
/** |
| 232 |
< |
* The flag that dictates whether the main loop should *completely* exit |
| 233 |
< |
*/ |
| 234 |
< |
private boolean run; |
| 182 |
> |
private String _clientname; |
| 183 |
|
|
| 184 |
|
//---STATIC ATTRIBUTES--- |
| 185 |
|
|
