1 |
|
//---PACKAGE DECLARATION--- |
2 |
< |
package uk.ac.ukc.iscream.filter; |
2 |
> |
package uk.org.iscream.cms.server.filter; |
3 |
|
|
4 |
|
//---IMPORTS--- |
5 |
|
import java.io.*; |
6 |
|
import java.net.*; |
7 |
|
import java.util.*; |
8 |
< |
import uk.ac.ukc.iscream.core.*; |
9 |
< |
import uk.ac.ukc.iscream.componentmanager.*; |
10 |
< |
import uk.ac.ukc.iscream.filter.*; |
11 |
< |
import uk.ac.ukc.iscream.util.*; |
8 |
> |
import uk.org.iscream.cms.server.core.*; |
9 |
> |
import uk.org.iscream.cms.server.componentmanager.*; |
10 |
> |
import uk.org.iscream.cms.server.filter.*; |
11 |
> |
import uk.org.iscream.cms.server.util.*; |
12 |
|
|
13 |
|
/** |
14 |
|
* This class contains the main method to be run by |
15 |
< |
* the filter children. It harvests UDP traffic. |
15 |
> |
* the filterd. It harvests UDP traffic, and queues it. |
16 |
|
* |
17 |
|
* @author $Author$ |
18 |
|
* @version $Id$ |
25 |
|
* The current CVS revision of this class |
26 |
|
*/ |
27 |
|
public final String REVISION = "$Revision$"; |
28 |
< |
|
28 |
> |
|
29 |
|
/** |
30 |
|
* The maximum size of a packet |
31 |
|
*/ |
36 |
|
//---CONSTRUCTORS--- |
37 |
|
|
38 |
|
/** |
39 |
< |
* It is normal to use this constructor in preference |
40 |
< |
* to any other in this class. |
39 |
> |
* Constructs a new UDPReader. |
40 |
> |
* |
41 |
> |
* @param port The port on which we listen for UDP data |
42 |
> |
* @param queue The queue which we are using |
43 |
|
*/ |
44 |
|
public UDPReader(int port, Queue queue){ |
45 |
+ |
// set the Thread name |
46 |
+ |
setName("filter.UDPReader"); |
47 |
+ |
|
48 |
|
_port = port; |
49 |
|
_queue = queue; |
50 |
+ |
_logger.write(toString(), Logger.SYSINIT, "started"); |
51 |
|
} |
52 |
|
|
53 |
|
//---PUBLIC METHODS--- |
54 |
< |
|
54 |
> |
|
55 |
> |
/** |
56 |
> |
* The main method in the class. Reads and queues XML sent |
57 |
> |
* over UDP. |
58 |
> |
*/ |
59 |
|
public void run() { |
60 |
< |
|
60 |
> |
|
61 |
> |
// setup a Datagram socket |
62 |
|
DatagramSocket socket = null; |
63 |
|
try { |
64 |
|
socket = new DatagramSocket(_port); |
73 |
|
} |
74 |
|
|
75 |
|
_logger.write(this.toString(), Logger.SYSMSG, "UDPReader thread ready and listening for UDP packets on port "+_port); |
76 |
< |
|
76 |
> |
|
77 |
|
byte[] buf; |
78 |
|
|
79 |
+ |
// read UDP packets and queue them |
80 |
|
boolean running = true; |
81 |
|
while (running){ |
82 |
|
try { |
83 |
< |
|
84 |
< |
// receive request and put it in the Queue |
83 |
> |
|
84 |
> |
// receive request and put it in the Queue |
85 |
|
buf = new byte[packetSizeLimit]; |
86 |
|
DatagramPacket packet = new DatagramPacket(buf, buf.length); |
87 |
|
socket.receive(packet); |
90 |
|
} |
91 |
|
catch (IOException e) { |
92 |
|
_logger.write(this.toString(), Logger.WARNING, "This UDPReader thread has been shut down as an exception occured: "+e); |
93 |
< |
return; |
93 |
> |
running = false; |
94 |
|
} |
95 |
|
} |
96 |
|
socket.close(); |
97 |
|
} |
98 |
< |
|
98 |
> |
|
99 |
|
/** |
100 |
|
* Overrides the {@link java.lang.Object#toString() Object.toString()} |
101 |
|
* method to provide clean logging (every class should have this). |
102 |
|
* |
103 |
< |
* This uses the uk.ac.ukc.iscream.util.NameFormat class |
103 |
> |
* This uses the uk.org.iscream.cms.server.util.NameFormat class |
104 |
|
* to format the toString() |
105 |
|
* |
106 |
|
* @return the name of this class and its CVS revision |
128 |
|
* be changed to null for utility classes. |
129 |
|
*/ |
130 |
|
private String _name = FilterMain.NAME; |
131 |
< |
|
131 |
> |
|
132 |
|
/** |
133 |
|
* This holds a reference to the |
134 |
|
* system logger that is being used. |
143 |
|
/** |
144 |
|
* The Queue object |
145 |
|
*/ |
146 |
< |
Queue _queue; |
146 |
> |
Queue _queue; |
147 |
|
|
148 |
|
//---STATIC ATTRIBUTES--- |
149 |
|
|