server/filter/TCPReaderInit.java

//---PACKAGE DECLARATION---

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

/**
 * <ONE LINE DESCRIPTION>
 * <DETAILED DESCRIPTION>
 *
 * @author  $Author$
 * @version $Id$
 */
class TCPReaderInit extends Thread {

//---FINAL ATTRIBUTES---

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

//---CONSTRUCTORS---

    public TCPReaderInit(Socket socket, ConfigurationManager configManager, Logger logRef, Filter parent) throws IOException {
        _configManager = configManager;
        _logRef = logRef;
        _socket = socket;
        _parent = parent;
        _socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
        _socketOut = new PrintWriter(_socket.getOutputStream());
        _logRef.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---

    //NEED TO MAJORILY CHANGE THIS BIT !
    public void run() {
        try {
            String inBound = _socketIn.readLine();
            if (!inBound.equals("STARTCONFIG")) {
                _socketOut.println("ERROR");
                _socketOut.flush();
                throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
            }

            Configuration myConfig = _configManager.getConfiguration(_socket.getInetAddress().getHostName().toLowerCase());
            if (myConfig == null) {
                _socketOut.println("ERROR");
                throw new IOException("error in host configuration");
            } else {
                _socketOut.println("OK");
                _socketOut.flush();
                
                // get lastmodified
                inBound = _socketIn.readLine();
                if(!inBound.equals("LASTMODIFIED")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getLastModified());
                        _socketOut.flush();
                }
                
                // get config fileList
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILELIST")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:FILELIST got:" + inBound);
                }
                else {
                        // send info
                        _socketOut.println(myConfig.getFileList());
                        _socketOut.flush();
                }

                // get properties
                inBound = _socketIn.readLine();
                while(!inBound.equals("ENDCONFIG")) {
                          
                    // get the property
                    try {
                        String returnedProperty = myConfig.getProperty(inBound);    
                        
                        _socketOut.println(returnedProperty);
                        _socketOut.flush();
    
                    } catch (org.omg.CORBA.MARSHAL e) {
                        _socketOut.println("ERROR");
                        _socketOut.flush();
                    }
                    inBound = _socketIn.readLine();
                }
                _logRef.write(toString(), Logger.SYSMSG, "configured host");
                _socketOut.println("OK");
                _socketOut.flush();
                
                // get filter reference
                inBound = _socketIn.readLine();
                if(!inBound.equals("FILTER")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:FILTER got:" + inBound);
                }
                else {
                        // send info
                        String parentFilter =  myConfig.getProperty("Host.filter");
                        _logRef.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
                        org.omg.CORBA.Object objRef = _ncRef.resolve(_ncRef.to_name("iscream.Filter." + parentFilter));
                    Filter filter = FilterHelper.narrow(objRef);
                        _socketOut.println(filter.getHostName() + ";"
                                         + filter.getUDPPort() + ";"
                                         + filter.getTCPPort());
                        _socketOut.flush();
                }
                
                // confirm that all is ok
                inBound = _socketIn.readLine();
                if(!inBound.equals("END")) {
                        // protocol error
                    _socketOut.println("ERROR");
                    _socketOut.flush();
                    throw new IOException("protocol error - expected:END got:" + inBound);
                }
                else {
                        // send ok
                        _socketOut.println("OK");
                        _socketOut.flush();
                }

            }
            
        } catch (Exception e) {
            _logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
        }
        
        _socketOut.flush();
        // Disconnect streams & socket
        try {
            _socketIn.close();
            _socketOut.close();
            _socket.close();
        } catch (IOException e) {
            _logRef.write(toString(), Logger.ERROR, "exception on socket close");
        }
        _logRef.write(toString(), Logger.SYSMSG, "finished");
    }
    
    /**
     * 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() + "{" + _socket.getInetAddress().getHostName() 
         + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
        
    }

//---PRIVATE METHODS---

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

//---ATTRIBUTES---

    ConfigurationManager _configManager;
    Logger _logRef;
    Socket _socket;
    BufferedReader _socketIn;
    PrintWriter _socketOut;
    Filter _parent;
//---STATIC ATTRIBUTES---

}
Revision:	1.1
Committed:	Mon Nov 27 00:43:26 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.io.InputStream;
8			import java.io.OutputStream;
9			import java.io.IOException;
10			import java.io.*;
11			import org.omg.CORBA.*;
12			import org.omg.CosNaming.*;
13
14			/**
15			* <ONE LINE DESCRIPTION>
16			* <DETAILED DESCRIPTION>
17			*
18			* @author $Author$
19			* @version $Id$
20			*/
21			class TCPReaderInit extends Thread {
22
23			//---FINAL ATTRIBUTES---
24
25			/**
26			* The current CVS revision of this class
27			*/
28			public final String REVISION = "$Revision: 1.1 $";
29
30			//---STATIC METHODS---
31
32			//---CONSTRUCTORS---
33
34			public TCPReaderInit(Socket socket, ConfigurationManager configManager, Logger logRef, Filter parent) throws IOException {
35			_configManager = configManager;
36			_logRef = logRef;
37			_socket = socket;
38			_parent = parent;
39			_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
40			_socketOut = new PrintWriter(_socket.getOutputStream());
41			_logRef.write(toString(), Logger.SYSINIT, "created");
42			}
43
44			//---PUBLIC METHODS---
45
46			//NEED TO MAJORILY CHANGE THIS BIT !
47			public void run() {
48			try {
49			String inBound = _socketIn.readLine();
50			if (!inBound.equals("STARTCONFIG")) {
51			_socketOut.println("ERROR");
52			_socketOut.flush();
53			throw new IOException("protocol error - expected:STARTCONFIG got:" + inBound);
54			}
55
56			Configuration myConfig = _configManager.getConfiguration(_socket.getInetAddress().getHostName().toLowerCase());
57			if (myConfig == null) {
58			_socketOut.println("ERROR");
59			throw new IOException("error in host configuration");
60			} else {
61			_socketOut.println("OK");
62			_socketOut.flush();
63
64			// get lastmodified
65			inBound = _socketIn.readLine();
66			if(!inBound.equals("LASTMODIFIED")) {
67			// protocol error
68			_socketOut.println("ERROR");
69			_socketOut.flush();
70			throw new IOException("protocol error - expected:LASTMODIFIED got:" + inBound);
71			}
72			else {
73			// send info
74			_socketOut.println(myConfig.getLastModified());
75			_socketOut.flush();
76			}
77
78			// get config fileList
79			inBound = _socketIn.readLine();
80			if(!inBound.equals("FILELIST")) {
81			// protocol error
82			_socketOut.println("ERROR");
83			_socketOut.flush();
84			throw new IOException("protocol error - expected:FILELIST got:" + inBound);
85			}
86			else {
87			// send info
88			_socketOut.println(myConfig.getFileList());
89			_socketOut.flush();
90			}
91
92			// get properties
93			inBound = _socketIn.readLine();
94			while(!inBound.equals("ENDCONFIG")) {
95
96			// get the property
97			try {
98			String returnedProperty = myConfig.getProperty(inBound);
99
100			_socketOut.println(returnedProperty);
101			_socketOut.flush();
102
103			} catch (org.omg.CORBA.MARSHAL e) {
104			_socketOut.println("ERROR");
105			_socketOut.flush();
106			}
107			inBound = _socketIn.readLine();
108			}
109			_logRef.write(toString(), Logger.SYSMSG, "configured host");
110			_socketOut.println("OK");
111			_socketOut.flush();
112
113			// get filter reference
114			inBound = _socketIn.readLine();
115			if(!inBound.equals("FILTER")) {
116			// protocol error
117			_socketOut.println("ERROR");
118			_socketOut.flush();
119			throw new IOException("protocol error - expected:FILTER got:" + inBound);
120			}
121			else {
122			// send info
123			String parentFilter = myConfig.getProperty("Host.filter");
124			_logRef.write(toString(), Logger.DEBUG, " looking for parent - " + parentFilter);
125			org.omg.CORBA.Object objRef = _ncRef.resolve(_ncRef.to_name("iscream.Filter." + parentFilter));
126			Filter filter = FilterHelper.narrow(objRef);
127			_socketOut.println(filter.getHostName() + ";"
128			+ filter.getUDPPort() + ";"
129			+ filter.getTCPPort());
130			_socketOut.flush();
131			}
132
133			// confirm that all is ok
134			inBound = _socketIn.readLine();
135			if(!inBound.equals("END")) {
136			// protocol error
137			_socketOut.println("ERROR");
138			_socketOut.flush();
139			throw new IOException("protocol error - expected:END got:" + inBound);
140			}
141			else {
142			// send ok
143			_socketOut.println("OK");
144			_socketOut.flush();
145			}
146
147			}
148
149			} catch (Exception e) {
150			_logRef.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
151			}
152
153			_socketOut.flush();
154			// Disconnect streams & socket
155			try {
156			_socketIn.close();
157			_socketOut.close();
158			_socket.close();
159			} catch (IOException e) {
160			_logRef.write(toString(), Logger.ERROR, "exception on socket close");
161			}
162			_logRef.write(toString(), Logger.SYSMSG, "finished");
163			}
164
165			/**
166			* Overrides the {@link java.lang.Object#toString() Object.toString()}
167			* method to provide clean logging (every class should have this).
168			*
169			* @return the name of this class and its CVS revision
170			*/
171			public String toString() {
172			return this.getClass().getName() + "{" + _socket.getInetAddress().getHostName()
173			+ "}(" + REVISION.substring(11, REVISION.length() - 2) + ")";
174
175			}
176
177			//---PRIVATE METHODS---
178
179			//---ACCESSOR/MUTATOR METHODS---
180
181			//---ATTRIBUTES---
182
183			ConfigurationManager _configManager;
184			Logger _logRef;
185			Socket _socket;
186			BufferedReader _socketIn;
187			PrintWriter _socketOut;
188			Filter _parent;
189			//---STATIC ATTRIBUTES---
190
191			}