server/filter/TCPReader.java

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

//---IMPORTS---
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.filter.*;
import java.net.Socket;
import java.net.ServerSocket;
import java.io.OutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.omg.CORBA.*;
import org.omg.CosNaming.*;

/**
 * A socket listener to listen for new hosts registering with the system.
 * When a host makes a connection, the connecton is past to an instance
 * of the HostInit class, which handles further communication.
 *
 * @author  $Author: tdb1 $
 * @version $Id: TCPReader.java,v 1.1 2000/11/27 00:43:17 tdb1 Exp $
 */
class TCPReader extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.1 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

        /**
     * Constructs a new listener
     *
     * @param logger a reference to the logger we are using
     * @param configManager a reference to the ConfigurationManager we are using
         * @param port The port that the server will listen on.
         */
    public TCPReader(Logger logger, ConfigurationManager configManager, int port, Filter parent) {
        _logger = logger;
        _configManager = configManager;
        _port = port;
        _parent = parent;
        _logger.write(toString(), Logger.SYSINIT, "started");
    }

    

//---PUBLIC METHODS---

        /**
         * The run() method is the main loop for this thread, and we
         * will remain in here until such a point as something goes
         * wrong with the listening. After initially setting up the
         * ServerSocket we go round a while loop receiving connections
         * and then passing them off to other processes to deal with.
         */
    public void run(){
        ServerSocket listenPort=null;
                // We use this boolean so we can break out of the while loop if we want
        boolean run = true;
        try{
                        // Setup the ServerSocket so that clients can connect
            listenPort = new ServerSocket(_port);
        }
        catch(IOException e){
        }
                // Log what machine/port we're listening on
                try{
                        _logger.write(toString(), Logger.SYSMSG, "TCPReader listening on "
                                                                                +InetAddress.getLocalHost().getHostName()
                                                                                +"/"+InetAddress.getLocalHost().getHostAddress()
                                                                                +" port "+listenPort.getLocalPort());
                }
                catch(UnknownHostException e){
                        _logger.write(toString(), Logger.SYSMSG, "TCPReader listening on UnknownHost "
                                                                                +"port "+listenPort.getLocalPort());
                }
                // Loop round constantly until we decide to stop
        while(run){
            Socket hostSocket=null;
            try{
                _logger.write(toString(), Logger.SYSMSG, "Waiting for Connection");
                                // This will block until a host connects - at which point we get a Socket
                hostSocket = listenPort.accept();
                _logger.write(toString(), Logger.SYSMSG, "Connection accepted from: " + hostSocket.toString());
            }
            catch(IOException e){
                                // Something went wrong with the ServerSocket, so we'll stop listening
                run=false;
            }
                        // If we've stopped on the line above we won't want to try this !
            if(run){
                                try {
                                    // Setup the HostInit so it can carry on communications with the host
                    TCPReaderInit init = new TCPReaderInit(hostSocket, _configManager, _logger, _parent);
                                    // and start it
                    init.start();
                } catch (IOException e) {
                    _logger.write(toString(), Logger.ERROR, e.toString());
                }
            }
        }
                // Best log the fact that we're stopping
        _logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending");
    }

    /**
     * Overrides the {@link java.lang.Object#toString() Object.toString()}
     * method to provide clean logging (every class should have this).
     *
     * @return the name of this class and its CVS revision
     */
    public String toString() {
        return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
    }

//---PRIVATE METHODS---

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

//---ATTRIBUTES---
    
    /**
     * A reference to the logger the system is using
     */
    Logger _logger;
    
    /**
     * A reference to the configurator the system is using
     */
    ConfigurationManager _configManager;
    
    /**
         * The port on which the server should listen.
         */
    private int _port;
    
    private Filter _parent;
    
//---STATIC ATTRIBUTES---

}
Revision:	1.2
Committed:	Wed Nov 29 19:26:00 2000 UTC (23 years, 5 months ago) by tdb
Branch:	MAIN
Changes since 1.1:	+3 -2 lines
Log Message:	Made changes to fit into the new package structure. Also made all classes, namely the UDPReader and FilterThread, conform to the Template class specification.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.2	package uk.ac.ukc.iscream.filter;
3	tdb	1.1
4			//---IMPORTS---
5			import uk.ac.ukc.iscream.core.*;
6			import uk.ac.ukc.iscream.filter.*;
7			import java.net.Socket;
8			import java.net.ServerSocket;
9			import java.io.OutputStream;
10			import java.io.IOException;
11			import java.net.InetAddress;
12			import java.net.UnknownHostException;
13			import org.omg.CORBA.*;
14			import org.omg.CosNaming.*;
15
16			/**
17			* A socket listener to listen for new hosts registering with the system.
18			* When a host makes a connection, the connecton is past to an instance
19			* of the HostInit class, which handles further communication.
20			*
21	tdb	1.2	* @author $Author: tdb1 $
22			* @version $Id: TCPReader.java,v 1.1 2000/11/27 00:43:17 tdb1 Exp $
23	tdb	1.1	*/
24			class TCPReader extends Thread {
25
26			//---FINAL ATTRIBUTES---
27
28			/**
29			* The current CVS revision of this class
30			*/
31			public final String REVISION = "$Revision: 1.1 $";
32
33			//---STATIC METHODS---
34
35			//---CONSTRUCTORS---
36
37			/**
38			* Constructs a new listener
39			*
40			* @param logger a reference to the logger we are using
41			* @param configManager a reference to the ConfigurationManager we are using
42			* @param port The port that the server will listen on.
43			*/
44			public TCPReader(Logger logger, ConfigurationManager configManager, int port, Filter parent) {
45			_logger = logger;
46			_configManager = configManager;
47			_port = port;
48			_parent = parent;
49			_logger.write(toString(), Logger.SYSINIT, "started");
50			}
51
52
53
54			//---PUBLIC METHODS---
55
56			/**
57			* The run() method is the main loop for this thread, and we
58			* will remain in here until such a point as something goes
59			* wrong with the listening. After initially setting up the
60			* ServerSocket we go round a while loop receiving connections
61			* and then passing them off to other processes to deal with.
62			*/
63			public void run(){
64			ServerSocket listenPort=null;
65			// We use this boolean so we can break out of the while loop if we want
66			boolean run = true;
67			try{
68			// Setup the ServerSocket so that clients can connect
69			listenPort = new ServerSocket(_port);
70			}
71			catch(IOException e){
72			}
73			// Log what machine/port we're listening on
74			try{
75			_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on "
76			+InetAddress.getLocalHost().getHostName()
77			+"/"+InetAddress.getLocalHost().getHostAddress()
78			+" port "+listenPort.getLocalPort());
79			}
80			catch(UnknownHostException e){
81			_logger.write(toString(), Logger.SYSMSG, "TCPReader listening on UnknownHost "
82			+"port "+listenPort.getLocalPort());
83			}
84			// Loop round constantly until we decide to stop
85			while(run){
86			Socket hostSocket=null;
87			try{
88			_logger.write(toString(), Logger.SYSMSG, "Waiting for Connection");
89			// This will block until a host connects - at which point we get a Socket
90			hostSocket = listenPort.accept();
91			_logger.write(toString(), Logger.SYSMSG, "Connection accepted from: " + hostSocket.toString());
92			}
93			catch(IOException e){
94			// Something went wrong with the ServerSocket, so we'll stop listening
95			run=false;
96			}
97			// If we've stopped on the line above we won't want to try this !
98			if(run){
99			try {
100			// Setup the HostInit so it can carry on communications with the host
101			TCPReaderInit init = new TCPReaderInit(hostSocket, _configManager, _logger, _parent);
102			// and start it
103			init.start();
104			} catch (IOException e) {
105			_logger.write(toString(), Logger.ERROR, e.toString());
106			}
107			}
108			}
109			// Best log the fact that we're stopping
110			_logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending");
111			}
112
113			/**
114			* Overrides the {@link java.lang.Object#toString() Object.toString()}
115			* method to provide clean logging (every class should have this).
116			*
117			* @return the name of this class and its CVS revision
118			*/
119			public String toString() {
120			return this.getClass().getName() + "(" + REVISION.substring(11, REVISION.length() - 2) + ")";
121			}
122
123			//---PRIVATE METHODS---
124
125			//---ACCESSOR/MUTATOR METHODS---
126
127			//---ATTRIBUTES---
128
129			/**
130			* A reference to the logger the system is using
131			*/
132			Logger _logger;
133
134			/**
135			* A reference to the configurator the system is using
136			*/
137			ConfigurationManager _configManager;
138
139			/**
140			* The port on which the server should listen.
141			*/
142			private int _port;
143
144			private Filter _parent;
145
146			//---STATIC ATTRIBUTES---
147
148			}