server/filter/TCPReader.java

//---PACKAGE DECLARATION---

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