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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.clientinterface; |
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|
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.util.*; |
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import uk.ac.ukc.iscream.componentmanager.*; |
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import uk.ac.ukc.iscream.core.*; |
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import java.util.*; |
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|
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/** |
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* Receives data from the incoming CORBA servant, places |
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* it in a Queue, and then arranges distribution to the |
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* ClientHandlers. |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: PacketSorter.java,v 1.2 2001/01/23 17:22:01 tdb1 Exp $ |
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*/ |
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class PacketSorter extends Thread { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.2 $"; |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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/** |
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* Creates a new PacketSorter. |
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*/ |
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public PacketSorter() { |
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_queue = new Queue(); |
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_hostMap = new HashMap(); |
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_allHostsList = new LinkedList(); |
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_logger.write(toString(), Logger.SYSINIT, "created"); |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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public void run() { |
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int qID = _queue.getQueue(); |
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while(true) { |
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String xml = ""; |
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try { |
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xml = (String) _queue.get(qID); |
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} |
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catch(InvalidQueueException e) { |
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_logger.write(toString(), Logger.ERROR, "Queue failure: "+e); |
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} |
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|
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// look at host map |
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|
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// should be a neater way to do this |
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XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml); |
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XMLPacket packet = xmlPacketMaker.createXMLPacket(); |
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String host = packet.getParam("packet.attributes.machine_name"); |
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|
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if(_hostMap.containsKey(host)) { |
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LinkedList list = (LinkedList) _hostMap.get(host); |
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Iterator i = list.iterator(); |
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while(i.hasNext()) { |
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((Queue) i.next()).add(xml); |
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} |
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} |
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|
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// look at all hosts |
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|
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Iterator j = _allHostsList.iterator(); |
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while(j.hasNext()) { |
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((Queue) j.next()).add(xml); |
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} |
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} |
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} |
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|
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// MUST DEAL WITH hostList="" implying "all hosts" |
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|
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public void register(Queue dhQueue, String hostList) { |
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if(hostList.equals("")) { |
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_allHostsList.add(dhQueue); |
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_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for all hosts"); |
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} |
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else { |
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StringTokenizer st = new StringTokenizer(hostList, ";"); |
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while(st.hasMoreTokens()) { |
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String host = st.nextToken(); |
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if(_hostMap.containsKey(host)) { |
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LinkedList list = (LinkedList) _hostMap.get(host); |
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list.add(dhQueue); |
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} |
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else { |
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LinkedList list = new LinkedList(); |
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list.add(dhQueue); |
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_hostMap.put(host, list); |
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} |
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} |
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_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for hosts: "+hostList); |
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} |
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} |
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|
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public void deregister(Queue dhQueue, String hostList) { |
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if(hostList.equals("")) { |
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_allHostsList.remove(dhQueue); |
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_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for all hosts"); |
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} |
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else { |
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StringTokenizer st = new StringTokenizer(hostList, ";"); |
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while(st.hasMoreTokens()) { |
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String host = st.nextToken(); |
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if(_hostMap.containsKey(host)) { |
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LinkedList list = (LinkedList) _hostMap.get(host); |
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list.remove(dhQueue); |
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if(list.size()==0) { |
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_hostMap.remove(host); |
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} |
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} |
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} |
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_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for hosts: "+hostList); |
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} |
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} |
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|
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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public Queue getQueue() { |
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return _queue; |
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} |
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|
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//---ATTRIBUTES--- |
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|
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = ClientInterfaceMain.NAME; |
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|
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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|
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private Queue _queue; |
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|
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private HashMap _hostMap; |
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private LinkedList _allHostsList; |
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|
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//---STATIC ATTRIBUTES--- |
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|
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} |
