| 7 |
|
import java.util.*; |
| 8 |
|
import uk.ac.ukc.iscream.core.*; |
| 9 |
|
import uk.ac.ukc.iscream.filter.*; |
| 10 |
< |
import uk.ac.ukc.iscream.xml.*; |
| 11 |
< |
import uk.ac.ukc.iscream.refman.*; |
| 10 |
> |
import uk.ac.ukc.iscream.util.*; |
| 11 |
|
|
| 12 |
|
/** |
| 13 |
< |
* Handle an incoming UDP packet as a separate thread. |
| 13 |
> |
* Handle an incoming packet as a separate thread. |
| 14 |
> |
* Passes the data through various plugins, then |
| 15 |
> |
* passes it on to the parent filter. |
| 16 |
|
* |
| 17 |
+ |
* Now grabs data from a single queue, rather than |
| 18 |
+ |
* waiting to be contacted. |
| 19 |
+ |
* |
| 20 |
|
* @author $Author$ |
| 21 |
|
* @version $Id$ |
| 22 |
|
*/ |
| 32 |
|
//---STATIC METHODS--- |
| 33 |
|
|
| 34 |
|
//---CONSTRUCTORS--- |
| 35 |
< |
|
| 36 |
< |
// Class constructor. Obtains the byte[] from a DatagramPacket. |
| 37 |
< |
public FilterThread(DatagramPacket packet, Filter parent){ |
| 35 |
> |
|
| 36 |
> |
/** |
| 37 |
> |
* Class constructor. |
| 38 |
> |
*/ |
| 39 |
> |
public FilterThread(Queue queue, Filter parent){ |
| 40 |
|
_parent = parent; |
| 41 |
< |
_rawPacket = packet.getData(); |
| 42 |
< |
_logger.write(this.toString(), Logger.DEBUG, "created"); |
| 37 |
< |
|
| 41 |
> |
_queue = queue; |
| 42 |
> |
_logger.write(toString(), Logger.DEBUG, "created"); |
| 43 |
|
} |
| 39 |
– |
|
| 40 |
– |
// Class constructor for passing XML Strings. |
| 41 |
– |
public FilterThread(String xml, Filter parent){ |
| 42 |
– |
_parent = parent; |
| 43 |
– |
_rawPacket = xml.getBytes(); |
| 44 |
– |
_logger.write(this.toString(), Logger.DEBUG, "created"); |
| 45 |
– |
} |
| 44 |
|
|
| 45 |
|
//---PUBLIC METHODS--- |
| 46 |
|
|
| 47 |
+ |
/** |
| 48 |
+ |
* Runs the thread |
| 49 |
+ |
*/ |
| 50 |
|
public void run(){ |
| 51 |
< |
|
| 52 |
< |
// Get a string without any null characters in it. |
| 53 |
< |
// -- maybe String.trim() would be better here ? |
| 54 |
< |
String xml = new String(_rawPacket); |
| 55 |
< |
if (xml.indexOf(0) != -1) { |
| 56 |
< |
xml = xml.substring(0, xml.indexOf(0)); |
| 51 |
> |
// get a queue for ourselves |
| 52 |
> |
int n = _queue.getQueue(); |
| 53 |
> |
// keep these out here, saves recreating the object |
| 54 |
> |
String xml = null; |
| 55 |
> |
while(true) { |
| 56 |
> |
// get a String of xml |
| 57 |
> |
try { |
| 58 |
> |
xml = (String) _queue.get(n); |
| 59 |
> |
} |
| 60 |
> |
catch (InvalidQueueException e) { |
| 61 |
> |
_logger.write(toString(), Logger.ERROR, "Queue error: "+e); |
| 62 |
> |
} |
| 63 |
> |
|
| 64 |
> |
// Get a string without any null characters in it. |
| 65 |
> |
// -- maybe String.trim() would be better here ? |
| 66 |
> |
if (xml.indexOf(0) != -1) { |
| 67 |
> |
xml = xml.substring(0, xml.indexOf(0)); |
| 68 |
> |
} |
| 69 |
> |
else { |
| 70 |
> |
xml = xml.substring(0, xml.length()); |
| 71 |
> |
} |
| 72 |
> |
|
| 73 |
> |
|
| 74 |
> |
// Bundle the XML all on one line (saves space and simplifies |
| 75 |
> |
// the protocol between clientinterface and client. |
| 76 |
> |
StringTokenizer tokenizer = new StringTokenizer(new String(xml), "\n"); |
| 77 |
> |
xml = ""; |
| 78 |
> |
while (tokenizer.hasMoreTokens()) { |
| 79 |
> |
xml += tokenizer.nextToken(); |
| 80 |
> |
} |
| 81 |
> |
|
| 82 |
> |
|
| 83 |
> |
// Use XMLPacketMaker to make an XMLPacket object. |
| 84 |
> |
XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml); |
| 85 |
> |
XMLPacket packet = xmlPacketMaker.createXMLPacket(); |
| 86 |
> |
|
| 87 |
> |
if(packet != null && PluginFilterManager.getInstance().runFilters(packet)) { |
| 88 |
> |
// packet is not null |
| 89 |
> |
// packet was not dropped by a plugin |
| 90 |
> |
// ... best pass it on ! |
| 91 |
> |
_parent.receiveXML(xml); |
| 92 |
> |
} |
| 93 |
> |
else { |
| 94 |
> |
// either we had a null, or a plugin dropped it |
| 95 |
> |
_logger.write(toString(), Logger.DEBUG, "An XML packet was sucessfully filtered from the system."); |
| 96 |
> |
} |
| 97 |
|
} |
| 57 |
– |
else { |
| 58 |
– |
xml = xml.substring(0, xml.length()); |
| 59 |
– |
} |
| 60 |
– |
|
| 61 |
– |
// Use my XMLPacketMaker to make an XMLPacket object. |
| 62 |
– |
XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml); |
| 63 |
– |
XMLPacket packet = xmlPacketMaker.createXMLPacket(); |
| 64 |
– |
|
| 65 |
– |
_logger.write(this.toString(), Logger.DEBUG, "got data, filtering and passing to parent - " + packet.printAll()); |
| 66 |
– |
|
| 67 |
– |
if (packet == null){ |
| 68 |
– |
// A null XML packet was returned - don't pass it on. |
| 69 |
– |
_logger.write(this.toString(), Logger.SYSMSG, "An XML UDP packet was sucessfully filtered from the system."); |
| 70 |
– |
return; |
| 71 |
– |
} |
| 72 |
– |
|
| 73 |
– |
// Now do something with this XMLPacket!!! |
| 74 |
– |
// .... let's try this... |
| 75 |
– |
_parent.receiveXML(xml); |
| 76 |
– |
|
| 98 |
|
} |
| 99 |
|
|
| 100 |
|
/** |
| 101 |
|
* Overrides the {@link java.lang.Object#toString() Object.toString()} |
| 102 |
|
* method to provide clean logging (every class should have this). |
| 103 |
|
* |
| 104 |
+ |
* This uses the uk.ac.ukc.iscream.util.NameFormat class |
| 105 |
+ |
* to format the toString() |
| 106 |
+ |
* |
| 107 |
|
* @return the name of this class and its CVS revision |
| 108 |
|
*/ |
| 109 |
|
public String toString() { |
| 110 |
< |
return this.getClass().getName() + "{" + _name + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
| 110 |
> |
return FormatName.getName( |
| 111 |
> |
_name, |
| 112 |
> |
getClass().getName(), |
| 113 |
> |
REVISION); |
| 114 |
|
} |
| 115 |
|
|
| 116 |
|
//---PRIVATE METHODS--- |
| 119 |
|
|
| 120 |
|
//---ATTRIBUTES--- |
| 121 |
|
|
| 122 |
+ |
/** |
| 123 |
+ |
* Our parent filter |
| 124 |
+ |
*/ |
| 125 |
|
Filter _parent; |
| 126 |
< |
byte[] _rawPacket; |
| 127 |
< |
Logger _logger = ReferenceManager.getInstance().getLogger(); |
| 128 |
< |
String _name = ReferenceManager.getInstance().getName(); |
| 126 |
> |
|
| 127 |
> |
/** |
| 128 |
> |
* The Queue object |
| 129 |
> |
*/ |
| 130 |
> |
Queue _queue; |
| 131 |
> |
|
| 132 |
> |
/** |
| 133 |
> |
* This is the friendly identifier of the |
| 134 |
> |
* component this class is running in. |
| 135 |
> |
* eg, a Filter may be called "filter1", |
| 136 |
> |
* If this class does not have an owning |
| 137 |
> |
* component, a name from the configuration |
| 138 |
> |
* can be placed here. This name could also |
| 139 |
> |
* be changed to null for utility classes. |
| 140 |
> |
*/ |
| 141 |
> |
private String _name = FilterMain.NAME; |
| 142 |
> |
|
| 143 |
> |
/** |
| 144 |
> |
* This holds a reference to the |
| 145 |
> |
* system logger that is being used. |
| 146 |
> |
*/ |
| 147 |
> |
private Logger _logger = ReferenceManager.getInstance().getLogger(); |
| 148 |
|
|
| 149 |
|
//---STATIC ATTRIBUTES--- |
| 150 |
|
|
