| 1 |
+ |
/* |
| 2 |
+ |
* i-scream central monitoring system |
| 3 |
+ |
* http://www.i-scream.org.uk |
| 4 |
+ |
* Copyright (C) 2000-2002 i-scream |
| 5 |
+ |
* |
| 6 |
+ |
* This program is free software; you can redistribute it and/or |
| 7 |
+ |
* modify it under the terms of the GNU General Public License |
| 8 |
+ |
* as published by the Free Software Foundation; either version 2 |
| 9 |
+ |
* of the License, or (at your option) any later version. |
| 10 |
+ |
* |
| 11 |
+ |
* This program is distributed in the hope that it will be useful, |
| 12 |
+ |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
+ |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
+ |
* GNU General Public License for more details. |
| 15 |
+ |
* |
| 16 |
+ |
* You should have received a copy of the GNU General Public License |
| 17 |
+ |
* along with this program; if not, write to the Free Software |
| 18 |
+ |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 |
+ |
*/ |
| 20 |
+ |
|
| 21 |
|
//---PACKAGE DECLARATION--- |
| 22 |
+ |
package uk.org.iscream.cms.conient; |
| 23 |
|
|
| 24 |
|
//---IMPORTS--- |
| 25 |
|
import java.io.*; |
| 26 |
< |
import uk.ac.ukc.iscream.util.*; |
| 26 |
> |
import uk.org.iscream.cms.util.*; |
| 27 |
|
|
| 28 |
|
/** |
| 29 |
< |
* Reads in bound data and presents it as it comes |
| 30 |
< |
* in for anything that wants it. |
| 29 |
> |
* The class reads in data from a BufferedReader, |
| 30 |
> |
* it then converts it to an XMLPacket and adds |
| 31 |
> |
* it to its Queue for anything that wants it. |
| 32 |
|
* |
| 33 |
|
* @author $Author$ |
| 34 |
|
* @version $Id$ |
| 46 |
|
|
| 47 |
|
//---CONSTRUCTORS--- |
| 48 |
|
|
| 49 |
< |
public DataReader(BufferedReader inBound, Queue dataQueue) { |
| 49 |
> |
/** |
| 50 |
> |
* Constructs a new data reader, giving it its BufferedReader |
| 51 |
> |
* and Queue. |
| 52 |
> |
* |
| 53 |
> |
* @param inBound the BufferedReader this class should use |
| 54 |
> |
* @param dataQueue the queue new data should be placed on |
| 55 |
> |
* @param ch the connection handler in use |
| 56 |
> |
*/ |
| 57 |
> |
public DataReader(BufferedReader inBound, Queue dataQueue, ConnectionHandler ch) { |
| 58 |
> |
_ch = ch; |
| 59 |
|
_inBound = inBound; |
| 60 |
|
_dataQueue = dataQueue; |
| 61 |
|
} |
| 62 |
|
|
| 63 |
|
//---PUBLIC METHODS--- |
| 64 |
|
|
| 65 |
+ |
/** |
| 66 |
+ |
* This thread reads data from the BufferedReader. |
| 67 |
+ |
* It does this until either there is a problem |
| 68 |
+ |
* or it is told to stop. |
| 69 |
+ |
* |
| 70 |
+ |
* If there is a problem it calls shutdownLinks in the |
| 71 |
+ |
* ConnectionHandler. |
| 72 |
+ |
* |
| 73 |
+ |
* Any data it reads it converts to XML and then |
| 74 |
+ |
* adds to its queue. |
| 75 |
+ |
*/ |
| 76 |
|
public void run() { |
| 35 |
– |
boolean running = true; |
| 77 |
|
try { |
| 78 |
< |
while (true) { |
| 79 |
< |
_dataQueue.add(_inBound.readLine()); |
| 80 |
< |
} |
| 78 |
> |
String line; |
| 79 |
> |
|
| 80 |
> |
// continue until we are told to stop |
| 81 |
> |
while (_running) { |
| 82 |
> |
line = _inBound.readLine(); |
| 83 |
> |
if (line == null) { |
| 84 |
> |
throw new IOException("unexpected loss of connection to server"); |
| 85 |
> |
} |
| 86 |
> |
_dataQueue.add(line); |
| 87 |
> |
} |
| 88 |
> |
|
| 89 |
> |
// close the BufferedReader |
| 90 |
> |
_inBound.close(); |
| 91 |
> |
|
| 92 |
|
} catch (IOException e) { |
| 93 |
< |
System.err.println("This DataReader thread has been shut down as an exception occured: "+e); |
| 94 |
< |
running = false; |
| 95 |
< |
return; |
| 93 |
> |
Conient.addMessage("WARNING{data reader}: inbound data stopped - "+e); |
| 94 |
> |
_running = false; |
| 95 |
> |
// tell the ConnectionHandler to shut down the links |
| 96 |
> |
_ch.shutdownDataLink(); |
| 97 |
|
} |
| 98 |
|
} |
| 99 |
|
|
| 100 |
+ |
/** |
| 101 |
+ |
* This method allows other classes |
| 102 |
+ |
* to shutdown this data reader. |
| 103 |
+ |
*/ |
| 104 |
+ |
public void shutdown() { |
| 105 |
+ |
_running = false; |
| 106 |
+ |
} |
| 107 |
+ |
|
| 108 |
|
//---PRIVATE METHODS--- |
| 109 |
|
|
| 110 |
|
//---ACCESSOR/MUTATOR METHODS--- |
| 111 |
|
|
| 112 |
|
//---ATTRIBUTES--- |
| 113 |
|
|
| 114 |
< |
BufferedReader _inBound; |
| 115 |
< |
Queue _dataQueue; |
| 116 |
< |
|
| 114 |
> |
/** |
| 115 |
> |
* The reader we are reading from. |
| 116 |
> |
*/ |
| 117 |
> |
private BufferedReader _inBound; |
| 118 |
> |
|
| 119 |
> |
/** |
| 120 |
> |
* The Queue we place data on. |
| 121 |
> |
*/ |
| 122 |
> |
private Queue _dataQueue; |
| 123 |
> |
|
| 124 |
> |
/** |
| 125 |
> |
* The state of this thread. |
| 126 |
> |
*/ |
| 127 |
> |
private boolean _running = true; |
| 128 |
> |
|
| 129 |
> |
/** |
| 130 |
> |
* A reference to the ConnectionHandler in use |
| 131 |
> |
*/ |
| 132 |
> |
private ConnectionHandler _ch; |
| 133 |
> |
|
| 134 |
|
//---STATIC ATTRIBUTES--- |
| 135 |
|
|
| 136 |
|
} |
