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: ajm4 $
 * @version $Id: TCPReaderInit.java,v 1.16 2001/02/11 18:01:43 ajm4 Exp $
 */
class TCPReaderInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.16 $";
    
//---STATIC METHODS---

//---CONSTRUCTORS---
    
    /**
     * Construct a new TCPReaderInit.
     *
     * @param socket the Socket to which the host is connected
     * @param queue the Queue to which we'll add data
     * @throws IOException if something goes badly wrong
     */
    public TCPReaderInit(Socket socket, Queue queue) throws IOException {
        _socket = socket;
        _queue = queue;
        // setup the reader & writer
        _socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
        _socketOut = new PrintWriter(_socket.getOutputStream(), true);
        _logger.write(toString(), Logger.SYSINIT, "created");
    }
    
//---PUBLIC METHODS---
    
    /**
     * Main run method. Will communicate with the host, inform it
     * if any updates to it's configuration are needed, and send
     * a heartbeat packet into the system.
     */
    public void run() {
        try {
            //variables
            String filelist = "";
            String lastModified = "";
            String inBound = "";
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("HEARTBEAT")) {
                _socketOut.println("ERROR");
                throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
            } else {
                _socketOut.println("OK");
            }
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("CONFIG")) {
                _socketOut.println("ERROR");
                throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
            } else {
                _socketOut.println("OK");
            }
            
            inBound = _socketIn.readLine();
            filelist = inBound;
            _socketOut.println("OK");
            
            inBound = _socketIn.readLine();
            lastModified = inBound;
            
            boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
            
            if(newConfig) {
                _socketOut.println("ERROR");
            }
            else {
                _socketOut.println("OK");
            }
            
            inBound = _socketIn.readLine();
            if(!inBound.equals("ENDHEARTBEAT")) {
                _socketOut.println("ERROR");
                throw new IOException("protocol error - expecting:ENDHEARTBEAT got:" + inBound);
            } else {
                _socketOut.println("OK");
            }

            String date = new Long(System.currentTimeMillis()).toString();
            String hostname = _socket.getInetAddress().getHostName();
            String ipadd = _socket.getInetAddress().getHostAddress();
            
            // run the service checks for this host
            _logger.write(toString(), Logger.DEBUG, "Running service checks");
            String checks = PluginServiceCheckManager.getInstance().runServiceChecks(hostname);
            
            // build the heartbeat packet
            String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\">" + checks + "</packet>";
            
            // get it to be sent on
            _queue.add(xml);
            
        } catch (Exception e) {
            _logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
        }
        
        // 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.DEBUG, "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:	1.17
Committed:	Sun Feb 11 20:35:26 2001 UTC (23 years, 3 months ago) by ajm
Branch:	MAIN
Changes since 1.16:	+4 -3 lines
Log Message:	added a line of logging
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.ac.ukc.iscream.filter;
3
4	//---IMPORTS---
5	import uk.ac.ukc.iscream.core.*;
6	import uk.ac.ukc.iscream.filter.*;
7	import uk.ac.ukc.iscream.componentmanager.*;
8	import java.net.Socket;
9	import java.io.InputStream;
10	import java.io.OutputStream;
11	import java.io.IOException;
12	import java.io.*;
13	import uk.ac.ukc.iscream.util.*;
14
15	/**
16	* This provides Host heartbeat functionality
17	*
18	* @author $Author: ajm4 $
19	* @version $Id: TCPReaderInit.java,v 1.16 2001/02/11 18:01:43 ajm4 Exp $
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: 1.16 $";
29
30	//---STATIC METHODS---
31
32	//---CONSTRUCTORS---
33
34	/**
35	* Construct a new TCPReaderInit.
36	*
37	* @param socket the Socket to which the host is connected
38	* @param queue the Queue to which we'll add data
39	* @throws IOException if something goes badly wrong
40	*/
41	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
42	_socket = socket;
43	_queue = queue;
44	// setup the reader & writer
45	_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
46	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
47	_logger.write(toString(), Logger.SYSINIT, "created");
48	}
49
50	//---PUBLIC METHODS---
51
52	/**
53	* Main run method. Will communicate with the host, inform it
54	* if any updates to it's configuration are needed, and send
55	* a heartbeat packet into the system.
56	*/
57	public void run() {
58	try {
59	//variables
60	String filelist = "";
61	String lastModified = "";
62	String inBound = "";
63
64	inBound = _socketIn.readLine();
65	if(!inBound.equals("HEARTBEAT")) {
66	_socketOut.println("ERROR");
67	throw new IOException("protocol error - expecting:HEARTBEAT got:" + inBound);
68	} else {
69	_socketOut.println("OK");
70	}
71
72	inBound = _socketIn.readLine();
73	if(!inBound.equals("CONFIG")) {
74	_socketOut.println("ERROR");
75	throw new IOException("protocol error - expecting:CONFIG got:" + inBound);
76	} else {
77	_socketOut.println("OK");
78	}
79
80	inBound = _socketIn.readLine();
81	filelist = inBound;
82	_socketOut.println("OK");
83
84	inBound = _socketIn.readLine();
85	lastModified = inBound;
86
87	boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
88
89	if(newConfig) {
90	_socketOut.println("ERROR");
91	}
92	else {
93	_socketOut.println("OK");
94	}
95
96	inBound = _socketIn.readLine();
97	if(!inBound.equals("ENDHEARTBEAT")) {
98	_socketOut.println("ERROR");
99	throw new IOException("protocol error - expecting:ENDHEARTBEAT got:" + inBound);
100	} else {
101	_socketOut.println("OK");
102	}
103
104	String date = new Long(System.currentTimeMillis()).toString();
105	String hostname = _socket.getInetAddress().getHostName();
106	String ipadd = _socket.getInetAddress().getHostAddress();
107
108	// run the service checks for this host
109	_logger.write(toString(), Logger.DEBUG, "Running service checks");
110	String checks = PluginServiceCheckManager.getInstance().runServiceChecks(hostname);
111
112	// build the heartbeat packet
113	String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\">" + checks + "</packet>";
114
115	// get it to be sent on
116	_queue.add(xml);
117
118	} catch (Exception e) {
119	_logger.write(toString(), Logger.ERROR, "ERROR: " + e.getMessage());
120	}
121
122	// Disconnect streams & socket
123	try {
124	_socketIn.close();
125	_socketOut.close();
126	_socket.close();
127	} catch (IOException e) {
128	_logger.write(toString(), Logger.ERROR, "exception on socket close");
129	}
130	_logger.write(toString(), Logger.DEBUG, "finished");
131	}
132
133	/**
134	* Overrides the {@link java.lang.Object#toString() Object.toString()}
135	* method to provide clean logging (every class should have this).
136	*
137	* This uses the uk.ac.ukc.iscream.util.NameFormat class
138	* to format the toString()
139	*
140	* @return the name of this class and its CVS revision
141	*/
142	public String toString() {
143	return FormatName.getName(
144	_name,
145	getClass().getName(),
146	REVISION);
147	}
148
149	//---PRIVATE METHODS---
150
151	//---ACCESSOR/MUTATOR METHODS---
152
153	//---ATTRIBUTES---
154
155	/**
156	* A reference to the configuration manager
157	*/
158	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
159
160	/**
161	* This is the friendly identifier of the
162	* component this class is running in.
163	* eg, a Filter may be called "filter1",
164	* If this class does not have an owning
165	* component, a name from the configuration
166	* can be placed here. This name could also
167	* be changed to null for utility classes.
168	*/
169	private String _name = FilterMain.NAME;
170
171	/**
172	* This holds a reference to the
173	* system logger that is being used.
174	*/
175	private Logger _logger = ReferenceManager.getInstance().getLogger();
176
177	/**
178	* The socket we are talking on
179	*/
180	Socket _socket;
181
182	/**
183	* The input from the socket
184	*/
185	BufferedReader _socketIn;
186
187	/**
188	* The output from the socket
189	*/
190	PrintWriter _socketOut;
191
192	/**
193	* A reference to our Queue
194	*/
195	Queue _queue;
196	//---STATIC ATTRIBUTES---
197
198	}