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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.conient; |
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//---IMPORTS--- |
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import java.io.*; |
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import uk.ac.ukc.iscream.util.*; |
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/** |
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* Reads in bound data and presents it as it comes |
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* in for anything that wants it. |
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* The class reads in data from a BufferedReader, |
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* it then converts it to an XMLPacket and adds |
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* it to its Queue for anything that wants it. |
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* |
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* @author $Author$ |
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* @version $Id$ |
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//---CONSTRUCTORS--- |
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public DataReader(BufferedReader inBound) { |
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/** |
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* Constructs a new data reader, giving it its BufferedReader |
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* and Queue. |
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* |
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* @param inBound the BufferedReader this class should use |
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* @param dataQueue the queue new data should be placed on |
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*/ |
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public DataReader(BufferedReader inBound, Queue dataQueue) { |
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_inBound = inBound; |
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_dataQueue = dataQueue; |
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} |
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//---PUBLIC METHODS--- |
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/** |
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* This thread reads data from the BufferedReader. |
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* It does this until either there is a problem |
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* or it is told to stop. |
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* |
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* Any data it reads it converts to XML and then |
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* adds to its queue. |
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*/ |
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public void run() { |
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boolean running = true; |
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while (running){ |
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try { |
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_xml = _inBound.readLine(); |
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synchronized (this) { |
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notifyAll(); |
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try { |
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String line; |
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// continue until we are told to stop |
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while (_running) { |
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line = _inBound.readLine(); |
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if (line == null) { |
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throw new IOException("unexpected loss of connection to server"); |
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} |
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_dataQueue.add(line); |
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} |
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catch (IOException e) { |
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System.err.println("This DataReader thread has been shut down as an exception occured: "+e); |
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running = false; |
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return; |
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} |
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// close the BufferedReader |
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_inBound.close(); |
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} catch (IOException e) { |
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Conient.addMessage("Data Channel Shutdown: reason - "+e); |
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_running = false; |
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} |
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} |
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/** |
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* This method allows other classes |
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* to shutdown this data reader. |
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*/ |
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public void shutdown() { |
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_running = false; |
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} |
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//---PRIVATE METHODS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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public String getXML() { |
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return _xml; |
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} |
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//---ATTRIBUTES--- |
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/** |
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* The reader we are reading from. |
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*/ |
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BufferedReader _inBound; |
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String _xml; |
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/** |
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* The Queue we place data on. |
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*/ |
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Queue _dataQueue; |
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/** |
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* The state of this thread. |
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*/ |
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boolean _running = true; |
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//---STATIC ATTRIBUTES--- |
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} |
