server/filter/TCPReaderInit.java

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

//---IMPORTS---
import uk.ac.ukc.iscream.core.*;
import uk.ac.ukc.iscream.filter.*;
import uk.ac.ukc.iscream.componentmanager.*;
import java.net.Socket;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.io.*;
import uk.ac.ukc.iscream.util.*;

/**
 * This provides Host heartbeat functionality
 *
 * @author  $Author: tdb1 $
 * @version $Id: TCPReaderInit.java,v 1.11 2001/01/12 00:45:25 tdb1 Exp $
 */
class TCPReaderInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.11 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

    public TCPReaderInit(Socket socket, Queue queue) throws IOException {
        _socket = socket;
        _queue = queue;
        _socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
        _socketOut = new PrintWriter(_socket.getOutputStream());
        _logger.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---

    public void run() {
        try {
            //variables
            String filelist = "";
            String lastModified = "";
            String inBound = "";
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("HEARTBEAT")) {
                _socketOut.println("ERROR");
                _socketOut.flush();
                throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
            } else {
                _socketOut.println("OK");
                _socketOut.flush();
            }
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("CONFIG")) {
                _socketOut.println("ERROR");
                _socketOut.flush();
                throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
            } else {
                _socketOut.println("OK");
                _socketOut.flush();
            }
            
            inBound = _socketIn.readLine();
            filelist = inBound;
            _socketOut.println("OK");
            _socketOut.flush();
            
            inBound = _socketIn.readLine();
            lastModified = inBound;
            
            boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
            
            if(newConfig) {
                _socketOut.println("ERROR");
            }
            else {
                _socketOut.println("OK");
            }
            _socketOut.flush();
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("ENDHEARTBEAT")) {
                _socketOut.println("ERROR");
                _socketOut.flush();
                throw new IOException("protocol error - expecting:ENDHEARTBEAT got:" + inBound);
            } else {
                _socketOut.println("OK");
                _socketOut.flush();
            }

            String date = new Long(System.currentTimeMillis()).toString();
            String hostname = _socket.getInetAddress().getHostName();
            String ipadd = _socket.getInetAddress().getHostAddress();
            String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\"></packet>";
            
            _queue.add(xml);
            
        } catch (Exception e) {
            _logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
        }
        
        _socketOut.flush();
        // Disconnect streams & socket
        try {
            _socketIn.close();
            _socketOut.close();
            _socket.close();
        } catch (IOException e) {
            _logger.write(toString(), Logger.ERROR, "exception on socket close");
        }
        _logger.write(toString(), Logger.SYSMSG, "finished");
    }
    
    /**
     * 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---

//---ATTRIBUTES---

    /**
     * A reference to the configuration manager
     */
    ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
    
    /**
     * 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 = FilterMain.NAME;

    /**
     * This holds a reference to the
     * system logger that is being used.
     */
    private Logger _logger = ReferenceManager.getInstance().getLogger();
    
    /**
     * The socket we are talking on
     */
    Socket _socket;
    
    /** 
     * The input from the socket
     */
    BufferedReader _socketIn;
    
    /**
     * The output from the socket
     */
    PrintWriter _socketOut;
    
    /**
     * A reference to our Queue
     */
    Queue _queue;
//---STATIC ATTRIBUTES---

}
Revision:	1.12
Committed:	Thu Jan 18 23:13:36 2001 UTC (23 years, 4 months ago) by tdb
Branch:	MAIN
Changes since 1.11:	+4 -3 lines
Log Message:	Changes to reflect move of Component, ComponentStartException, and the ReferenceManager from util to componentmanager.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.5	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	tdb	1.12	import uk.ac.ukc.iscream.componentmanager.*;
8	tdb	1.1	import java.net.Socket;
9			import java.io.InputStream;
10			import java.io.OutputStream;
11			import java.io.IOException;
12			import java.io.*;
13	ajm	1.9	import uk.ac.ukc.iscream.util.*;
14	tdb	1.1
15			/**
16	ajm	1.10	* This provides Host heartbeat functionality
17	tdb	1.1	*
18	tdb	1.12	* @author $Author: tdb1 $
19			* @version $Id: TCPReaderInit.java,v 1.11 2001/01/12 00:45:25 tdb1 Exp $
20	tdb	1.1	*/
21			class TCPReaderInit extends Thread {
22
23			//---FINAL ATTRIBUTES---
24
25			/**
26			* The current CVS revision of this class
27			*/
28	tdb	1.12	public final String REVISION = "$Revision: 1.11 $";
29	tdb	1.1
30			//---STATIC METHODS---
31
32			//---CONSTRUCTORS---
33
34	tdb	1.11	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
35	tdb	1.1	_socket = socket;
36	tdb	1.11	_queue = queue;
37	tdb	1.1	_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
38			_socketOut = new PrintWriter(_socket.getOutputStream());
39	tdb	1.8	_logger.write(toString(), Logger.SYSINIT, "created");
40	tdb	1.1	}
41
42			//---PUBLIC METHODS---
43
44			public void run() {
45			try {
46	tdb	1.3	//variables
47			String filelist = "";
48			String lastModified = "";
49			String inBound = "";
50	tdb	1.2
51	tdb	1.3	inBound = _socketIn.readLine();
52			if(!inBound.equals("HEARTBEAT")) {
53			_socketOut.println("ERROR");
54			_socketOut.flush();
55			throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
56			} else {
57			_socketOut.println("OK");
58			_socketOut.flush();
59			}
60
61			inBound = _socketIn.readLine();
62			if(!inBound.equals("CONFIG")) {
63			_socketOut.println("ERROR");
64			_socketOut.flush();
65			throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
66			} else {
67			_socketOut.println("OK");
68			_socketOut.flush();
69			}
70
71			inBound = _socketIn.readLine();
72			filelist = inBound;
73			_socketOut.println("OK");
74			_socketOut.flush();
75
76			inBound = _socketIn.readLine();
77			lastModified = inBound;
78
79			boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
80
81			if(newConfig) {
82			_socketOut.println("ERROR");
83			}
84			else {
85			_socketOut.println("OK");
86			}
87			_socketOut.flush();
88
89			inBound = _socketIn.readLine();
90			if(!inBound.equals("ENDHEARTBEAT")) {
91			_socketOut.println("ERROR");
92			_socketOut.flush();
93			throw new IOException("protocol error - expecting:ENDHEARTBEAT got:" + inBound);
94			} else {
95			_socketOut.println("OK");
96			_socketOut.flush();
97			}
98	tdb	1.4
99	tdb	1.6	String date = new Long(System.currentTimeMillis()).toString();
100			String hostname = _socket.getInetAddress().getHostName();
101			String ipadd = _socket.getInetAddress().getHostAddress();
102			String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\"></packet>";
103
104	tdb	1.11	_queue.add(xml);
105	tdb	1.1
106			} catch (Exception e) {
107	tdb	1.8	_logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
108	tdb	1.1	}
109
110			_socketOut.flush();
111			// Disconnect streams & socket
112			try {
113			_socketIn.close();
114			_socketOut.close();
115			_socket.close();
116			} catch (IOException e) {
117	tdb	1.8	_logger.write(toString(), Logger.ERROR, "exception on socket close");
118	tdb	1.1	}
119	tdb	1.8	_logger.write(toString(), Logger.SYSMSG, "finished");
120	tdb	1.1	}
121
122			/**
123			* Overrides the {@link java.lang.Object#toString() Object.toString()}
124			* method to provide clean logging (every class should have this).
125			*
126	ajm	1.10	* This uses the uk.ac.ukc.iscream.util.NameFormat class
127			* to format the toString()
128			*
129	tdb	1.1	* @return the name of this class and its CVS revision
130			*/
131			public String toString() {
132	ajm	1.10	return FormatName.getName(
133			_name,
134			getClass().getName(),
135			REVISION);
136	tdb	1.1	}
137
138			//---PRIVATE METHODS---
139
140			//---ACCESSOR/MUTATOR METHODS---
141
142			//---ATTRIBUTES---
143
144	ajm	1.10	/**
145			* A reference to the configuration manager
146			*/
147	tdb	1.8	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
148	ajm	1.10
149			/**
150			* This is the friendly identifier of the
151			* component this class is running in.
152			* eg, a Filter may be called "filter1",
153			* If this class does not have an owning
154			* component, a name from the configuration
155			* can be placed here. This name could also
156			* be changed to null for utility classes.
157			*/
158			private String _name = FilterMain.NAME;
159
160			/**
161			* This holds a reference to the
162			* system logger that is being used.
163			*/
164			private Logger _logger = ReferenceManager.getInstance().getLogger();
165
166			/**
167			* The socket we are talking on
168			*/
169	tdb	1.1	Socket _socket;
170	ajm	1.10
171			/**
172			* The input from the socket
173			*/
174	tdb	1.1	BufferedReader _socketIn;
175	ajm	1.10
176			/**
177			* The output from the socket
178			*/
179	tdb	1.1	PrintWriter _socketOut;
180	ajm	1.10
181			/**
182	tdb	1.11	* A reference to our Queue
183	ajm	1.10	*/
184	tdb	1.11	Queue _queue;
185	tdb	1.1	//---STATIC ATTRIBUTES---
186
187			}