server/clientinterface/PacketSorter.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.clientinterface;

//---IMPORTS---
import uk.ac.ukc.iscream.util.*;
import uk.ac.ukc.iscream.componentmanager.*;
import uk.ac.ukc.iscream.core.*;
import java.util.*;

/**
 * Receives data from the incoming CORBA servant, places
 * it in a Queue, and then arranges distribution to the
 * ClientHandlers.
 *
 * @author  $Author: tdb1 $
 * @version $Id: PacketSorter.java,v 1.2 2001/01/23 17:22:01 tdb1 Exp $
 */
class PacketSorter extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.2 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    /**
     * Creates a new PacketSorter.
     */
    public PacketSorter() {
        _queue = new Queue();
        _hostMap = new HashMap();
        _allHostsList = new LinkedList();
        _logger.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---

    public void run() {
        int qID = _queue.getQueue();
        while(true) {
            String xml = "";
            try {
                xml = (String) _queue.get(qID);
            }
            catch(InvalidQueueException e) {
                _logger.write(toString(), Logger.ERROR, "Queue failure: "+e);
            }
            
            // look at host map
            
            // should be a neater way to do this
            XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
            XMLPacket packet = xmlPacketMaker.createXMLPacket();
            String host = packet.getParam("packet.attributes.machine_name");
            
            if(_hostMap.containsKey(host)) {
                LinkedList list = (LinkedList) _hostMap.get(host);
                Iterator i = list.iterator();
                while(i.hasNext()) {
                    ((Queue) i.next()).add(xml);
                }
            }
            
            //  look at all hosts
            
            Iterator j = _allHostsList.iterator();
            while(j.hasNext()) {
                ((Queue) j.next()).add(xml);
            }
        }
    }
    
    // MUST DEAL WITH hostList="" implying "all hosts"
    
    public void register(Queue dhQueue, String hostList) {
        if(hostList.equals("")) {
            _allHostsList.add(dhQueue);
            _logger.write(toString(), Logger.SYSMSG, "registered DataHandler for all hosts");
        }
        else {
            StringTokenizer st = new StringTokenizer(hostList, ";");
            while(st.hasMoreTokens()) {
                String host = st.nextToken();
                if(_hostMap.containsKey(host)) {
                    LinkedList list = (LinkedList) _hostMap.get(host);
                    list.add(dhQueue);
                }
                else {
                    LinkedList list = new LinkedList();
                    list.add(dhQueue);
                    _hostMap.put(host, list);
                }
            }
            _logger.write(toString(), Logger.SYSMSG, "registered DataHandler for hosts: "+hostList);
        }
    }
    
    public void deregister(Queue dhQueue, String hostList) {
        if(hostList.equals("")) {
            _allHostsList.remove(dhQueue);
            _logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for all hosts");
        }
        else {
            StringTokenizer st = new StringTokenizer(hostList, ";");
            while(st.hasMoreTokens()) {
                String host = st.nextToken();
                if(_hostMap.containsKey(host)) {
                    LinkedList list = (LinkedList) _hostMap.get(host);
                    list.remove(dhQueue);
                    if(list.size()==0) {
                        _hostMap.remove(host);
                    }
                }
            }
            _logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for hosts: "+hostList);
        }
    }
    
    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * This uses the uk.ac.ukc.iscream.util.NameFormat class
     * to format the toString()
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return FormatName.getName(
            _name,
            getClass().getName(),
            REVISION);
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

    public Queue getQueue() {
        return _queue;
    }

//---ATTRIBUTES---

    /**
     * This is the friendly identifier of the
     * component this class is running in.
     * eg, a Filter may be called "filter1",
     * If this class does not have an owning
     * component,  a name from the configuration
     * can be placed here.  This name could also
     * be changed to null for utility classes.
     */
    private String _name = ClientInterfaceMain.NAME;

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();
    
    private Queue _queue;
    
    private HashMap _hostMap;
    private LinkedList _allHostsList;
    
//---STATIC ATTRIBUTES---

}
Revision:	1.3
Committed:	Tue Jan 23 18:23:03 2001 UTC (23 years, 3 months ago) by tdb
Branch:	MAIN
Changes since 1.2:	+10 -7 lines
Log Message:	General bug fixing. It now works for the features it should.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2			package uk.ac.ukc.iscream.clientinterface;
3
4			//---IMPORTS---
5			import uk.ac.ukc.iscream.util.*;
6			import uk.ac.ukc.iscream.componentmanager.*;
7			import uk.ac.ukc.iscream.core.*;
8			import java.util.*;
9
10			/**
11			* Receives data from the incoming CORBA servant, places
12			* it in a Queue, and then arranges distribution to the
13			* ClientHandlers.
14			*
15	tdb	1.2	* @author $Author: tdb1 $
16	tdb	1.3	* @version $Id: PacketSorter.java,v 1.2 2001/01/23 17:22:01 tdb1 Exp $
17	tdb	1.1	*/
18			class PacketSorter extends Thread {
19
20			//---FINAL ATTRIBUTES---
21
22			/**
23			* The current CVS revision of this class
24			*/
25	tdb	1.3	public final String REVISION = "$Revision: 1.2 $";
26	tdb	1.1
27			//---STATIC METHODS---
28
29			//---CONSTRUCTORS---
30
31			/**
32			* Creates a new PacketSorter.
33			*/
34			public PacketSorter() {
35			_queue = new Queue();
36			_hostMap = new HashMap();
37	tdb	1.2	_allHostsList = new LinkedList();
38	tdb	1.1	_logger.write(toString(), Logger.SYSINIT, "created");
39			}
40
41			//---PUBLIC METHODS---
42
43			public void run() {
44			int qID = _queue.getQueue();
45			while(true) {
46			String xml = "";
47			try {
48			xml = (String) _queue.get(qID);
49			}
50			catch(InvalidQueueException e) {
51			_logger.write(toString(), Logger.ERROR, "Queue failure: "+e);
52			}
53
54	tdb	1.2	// look at host map
55
56	tdb	1.1	// should be a neater way to do this
57	tdb	1.3	XMLPacketMaker xmlPacketMaker = new XMLPacketMaker(xml);
58			XMLPacket packet = xmlPacketMaker.createXMLPacket();
59	tdb	1.1	String host = packet.getParam("packet.attributes.machine_name");
60
61	tdb	1.3	if(_hostMap.containsKey(host)) {
62			LinkedList list = (LinkedList) _hostMap.get(host);
63			Iterator i = list.iterator();
64			while(i.hasNext()) {
65			((Queue) i.next()).add(xml);
66			}
67	tdb	1.1	}
68	tdb	1.2
69			// look at all hosts
70
71			Iterator j = _allHostsList.iterator();
72			while(j.hasNext()) {
73			((Queue) j.next()).add(xml);
74			}
75	tdb	1.1	}
76			}
77
78			// MUST DEAL WITH hostList="" implying "all hosts"
79
80			public void register(Queue dhQueue, String hostList) {
81	tdb	1.2	if(hostList.equals("")) {
82			_allHostsList.add(dhQueue);
83			_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for all hosts");
84			}
85			else {
86			StringTokenizer st = new StringTokenizer(hostList, ";");
87			while(st.hasMoreTokens()) {
88			String host = st.nextToken();
89			if(_hostMap.containsKey(host)) {
90			LinkedList list = (LinkedList) _hostMap.get(host);
91			list.add(dhQueue);
92			}
93			else {
94			LinkedList list = new LinkedList();
95			list.add(dhQueue);
96			_hostMap.put(host, list);
97			}
98	tdb	1.1	}
99	tdb	1.2	_logger.write(toString(), Logger.SYSMSG, "registered DataHandler for hosts: "+hostList);
100	tdb	1.1	}
101			}
102
103			public void deregister(Queue dhQueue, String hostList) {
104	tdb	1.2	if(hostList.equals("")) {
105			_allHostsList.remove(dhQueue);
106			_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for all hosts");
107			}
108			else {
109			StringTokenizer st = new StringTokenizer(hostList, ";");
110			while(st.hasMoreTokens()) {
111			String host = st.nextToken();
112			if(_hostMap.containsKey(host)) {
113			LinkedList list = (LinkedList) _hostMap.get(host);
114			list.remove(dhQueue);
115			if(list.size()==0) {
116			_hostMap.remove(host);
117			}
118	tdb	1.1	}
119			}
120	tdb	1.2	_logger.write(toString(), Logger.SYSMSG, "deregistered DataHandler for hosts: "+hostList);
121	tdb	1.1	}
122			}
123
124			/**
125			* Overrides the {@link java.lang.Object#toString() Object.toString()}
126			* method to provide clean logging (every class should have this).
127			*
128			* This uses the uk.ac.ukc.iscream.util.NameFormat class
129			* to format the toString()
130			*
131			* @return the name of this class and its CVS revision
132			*/
133			public String toString() {
134			return FormatName.getName(
135			_name,
136			getClass().getName(),
137			REVISION);
138			}
139
140			//---PRIVATE METHODS---
141
142			//---ACCESSOR/MUTATOR METHODS---
143
144			public Queue getQueue() {
145			return _queue;
146			}
147
148			//---ATTRIBUTES---
149
150			/**
151			* This is the friendly identifier of the
152			* component this class is running in.
153			* eg, a Filter may be called "filter1",
154			* If this class does not have an owning
155			* component, a name from the configuration
156			* can be placed here. This name could also
157			* be changed to null for utility classes.
158			*/
159			private String _name = ClientInterfaceMain.NAME;
160
161			/**
162			* This holds a reference to the
163			* system logger that is being used.
164			*/
165			private Logger _logger = ReferenceManager.getInstance().getLogger();
166
167			private Queue _queue;
168
169			private HashMap _hostMap;
170	tdb	1.2	private LinkedList _allHostsList;
171	tdb	1.1
172			//---STATIC ATTRIBUTES---
173
174			}