server/filter/TCPReaderInit.java

//---PACKAGE DECLARATION---
package uk.org.iscream.cms.server.filter;

//---IMPORTS---
import uk.org.iscream.cms.server.core.*;
import uk.org.iscream.cms.server.filter.*;
import uk.org.iscream.cms.server.componentmanager.*;
import java.net.Socket;
import java.io.*;
import java.util.Random;
import uk.org.iscream.cms.server.util.*;

/**
 * This provides Host heartbeat functionality
 *
 * @author  $Author: tdb $
 * @version $Id: TCPReaderInit.java,v 1.27 2002/03/21 17:44:51 tdb Exp $
 */
class TCPReaderInit extends Thread {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.27 $";
    
//---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 {
        // set the Thread name
        setName("filter.TCPReaderInit");
        
        _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 {
            // get an instance of the KeyManager
            KeyManager keyman = KeyManager.getInstance();
            
            // get some information about the host
            String hostname = _socket.getInetAddress().getHostName().toLowerCase();
            String ipadd = _socket.getInetAddress().getHostAddress();
            
            // try for HEARTBEAT
            getInBound("HEARTBEAT");
            _socketOut.println("OK");
            
            // look for a command:
            // CONFIG - to check config
            // KEY - to get the key
            // ENDHEARTBEAT - to finish            
            String cmd = getInBound();
            while(!cmd.equals("ENDHEARTBEAT")) {
                if(cmd.equals("CONFIG")) {
                    // respond to CONFIG
                    _socketOut.println("OK");
                        
                    // try for {filelist}
                    String filelist = getInBound();
                    _socketOut.println("OK");
                    
                    // try for {lastModified}
                    String lastModified = getInBound();
                    // check to see if a config update has happen
                    boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
                    if(newConfig) {
                        // new config !
                        _socketOut.println("ERROR");
                    }
                    else {
                        // nothing has changed
                        _socketOut.println("OK");
                    }
                }
                else if(cmd.equals("KEY")) {
                    // repsond to KEY
                    // generate a key
                    String key = keyman.genKey();
                    // add it to the key manager
                    keyman.addKey(hostname, key);
                    _socketOut.println(key);
                }
                else {
                    _socketOut.println("ERROR");
                }
                // get the next command
                cmd = getInBound();
            }
            
            // respond to ENDHEARTBEAT
            _socketOut.println("OK");
            
            // work out some information for our heartbeat packet
            String date = new Long(System.currentTimeMillis()/((long) 1000)).toString(); //seconds
            
            // 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);
        }
        
        // 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.org.iscream.cms.server.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---

    private String getInBound(String expected) throws IOException {
        // grab the input
        String inBound = getInBound();
        // check if it's what we're expecting
        if(!inBound.equals(expected)) {
            throw new IOException("protocol error from "+_socket.getInetAddress().getHostName()+" - expected:"+expected+" got:" + inBound);
        }
        // it should be ok then
        return inBound;
    }
    
    private String getInBound() throws IOException {
        // grab the input
        String inBound = _socketIn.readLine();
        // check for null's, likely disconnection
        if(inBound == null) {
            throw new IOException("got null from host, maybe it died");
        }
        // it's a valid message it seems
        return inBound;
    }
    
//---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:	1.28
Committed:	Thu Mar 21 22:09:13 2002 UTC (22 years, 2 months ago) by tdb
Branch:	MAIN
Changes since 1.27:	+2 -12 lines
Log Message:	Removed a few lines of unused code.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2	tdb	1.25	package uk.org.iscream.cms.server.filter;
3	tdb	1.1
4			//---IMPORTS---
5	tdb	1.25	import uk.org.iscream.cms.server.core.*;
6			import uk.org.iscream.cms.server.filter.*;
7			import uk.org.iscream.cms.server.componentmanager.*;
8	tdb	1.1	import java.net.Socket;
9			import java.io.*;
10	tdb	1.27	import java.util.Random;
11	tdb	1.25	import uk.org.iscream.cms.server.util.*;
12	tdb	1.1
13			/**
14	ajm	1.10	* This provides Host heartbeat functionality
15	tdb	1.1	*
16	tdb	1.26	* @author $Author: tdb $
17	tdb	1.28	* @version $Id: TCPReaderInit.java,v 1.27 2002/03/21 17:44:51 tdb Exp $
18	tdb	1.1	*/
19			class TCPReaderInit extends Thread {
20
21			//---FINAL ATTRIBUTES---
22
23			/**
24			* The current CVS revision of this class
25			*/
26	tdb	1.28	public final String REVISION = "$Revision: 1.27 $";
27	tdb	1.1
28			//---STATIC METHODS---
29
30			//---CONSTRUCTORS---
31	tdb	1.13
32			/**
33			* Construct a new TCPReaderInit.
34			*
35			* @param socket the Socket to which the host is connected
36			* @param queue the Queue to which we'll add data
37			* @throws IOException if something goes badly wrong
38			*/
39	tdb	1.11	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
40	tdb	1.21	// set the Thread name
41			setName("filter.TCPReaderInit");
42
43	tdb	1.1	_socket = socket;
44	tdb	1.11	_queue = queue;
45	tdb	1.13	// setup the reader & writer
46	tdb	1.1	_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
47	tdb	1.15	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
48	tdb	1.8	_logger.write(toString(), Logger.SYSINIT, "created");
49	tdb	1.1	}
50
51			//---PUBLIC METHODS---
52	tdb	1.13
53			/**
54			* Main run method. Will communicate with the host, inform it
55			* if any updates to it's configuration are needed, and send
56			* a heartbeat packet into the system.
57			*/
58	tdb	1.1	public void run() {
59			try {
60	tdb	1.27	// get an instance of the KeyManager
61			KeyManager keyman = KeyManager.getInstance();
62
63			// get some information about the host
64			String hostname = _socket.getInetAddress().getHostName().toLowerCase();
65			String ipadd = _socket.getInetAddress().getHostAddress();
66	tdb	1.2
67	tdb	1.22	// try for HEARTBEAT
68	tdb	1.23	getInBound("HEARTBEAT");
69	tdb	1.22	_socketOut.println("OK");
70	tdb	1.3
71	tdb	1.27	// look for a command:
72			// CONFIG - to check config
73			// KEY - to get the key
74			// ENDHEARTBEAT - to finish
75			String cmd = getInBound();
76			while(!cmd.equals("ENDHEARTBEAT")) {
77			if(cmd.equals("CONFIG")) {
78			// respond to CONFIG
79			_socketOut.println("OK");
80
81			// try for {filelist}
82			String filelist = getInBound();
83			_socketOut.println("OK");
84
85			// try for {lastModified}
86			String lastModified = getInBound();
87			// check to see if a config update has happen
88			boolean newConfig = _configManager.isModified(filelist, Long.parseLong(lastModified));
89			if(newConfig) {
90			// new config !
91			_socketOut.println("ERROR");
92			}
93			else {
94			// nothing has changed
95			_socketOut.println("OK");
96			}
97			}
98			else if(cmd.equals("KEY")) {
99			// repsond to KEY
100			// generate a key
101			String key = keyman.genKey();
102			// add it to the key manager
103			keyman.addKey(hostname, key);
104			_socketOut.println(key);
105			}
106			else {
107			_socketOut.println("ERROR");
108			}
109			// get the next command
110			cmd = getInBound();
111	tdb	1.3	}
112
113	tdb	1.27	// respond to ENDHEARTBEAT
114	tdb	1.22	_socketOut.println("OK");
115
116			// work out some information for our heartbeat packet
117			String date = new Long(System.currentTimeMillis()/((long) 1000)).toString(); //seconds
118	tdb	1.6
119	ajm	1.16	// run the service checks for this host
120	ajm	1.17	_logger.write(toString(), Logger.DEBUG, "Running service checks");
121	ajm	1.16	String checks = PluginServiceCheckManager.getInstance().runServiceChecks(hostname);
122
123			// build the heartbeat packet
124			String xml = "<packet type=\"heartbeat\" machine_name=\""+hostname+"\" date=\""+date+"\" ip=\""+ipadd+"\">" + checks + "</packet>";
125
126			// get it to be sent on
127	tdb	1.11	_queue.add(xml);
128	tdb	1.1
129			} catch (Exception e) {
130	tdb	1.20	_logger.write(toString(), Logger.ERROR, "ERROR: " + e);
131	tdb	1.1	}
132
133			// Disconnect streams & socket
134			try {
135			_socketIn.close();
136			_socketOut.close();
137			_socket.close();
138			} catch (IOException e) {
139	tdb	1.8	_logger.write(toString(), Logger.ERROR, "exception on socket close");
140	tdb	1.1	}
141	tdb	1.14	_logger.write(toString(), Logger.DEBUG, "finished");
142	tdb	1.1	}
143
144			/**
145			* Overrides the {@link java.lang.Object#toString() Object.toString()}
146			* method to provide clean logging (every class should have this).
147			*
148	tdb	1.25	* This uses the uk.org.iscream.cms.server.util.NameFormat class
149	ajm	1.10	* to format the toString()
150			*
151	tdb	1.1	* @return the name of this class and its CVS revision
152			*/
153			public String toString() {
154	ajm	1.10	return FormatName.getName(
155			_name,
156			getClass().getName(),
157			REVISION);
158	tdb	1.1	}
159
160			//---PRIVATE METHODS---
161	tdb	1.22
162			private String getInBound(String expected) throws IOException {
163			// grab the input
164			String inBound = getInBound();
165			// check if it's what we're expecting
166			if(!inBound.equals(expected)) {
167	tdb	1.26	throw new IOException("protocol error from "+_socket.getInetAddress().getHostName()+" - expected:"+expected+" got:" + inBound);
168	tdb	1.22	}
169			// it should be ok then
170			return inBound;
171			}
172
173			private String getInBound() throws IOException {
174			// grab the input
175			String inBound = _socketIn.readLine();
176			// check for null's, likely disconnection
177			if(inBound == null) {
178			throw new IOException("got null from host, maybe it died");
179			}
180			// it's a valid message it seems
181			return inBound;
182			}
183	tdb	1.27
184	tdb	1.1	//---ACCESSOR/MUTATOR METHODS---
185
186			//---ATTRIBUTES---
187
188	ajm	1.10	/**
189			* A reference to the configuration manager
190			*/
191	tdb	1.8	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
192	ajm	1.10
193			/**
194			* This is the friendly identifier of the
195			* component this class is running in.
196			* eg, a Filter may be called "filter1",
197			* If this class does not have an owning
198			* component, a name from the configuration
199			* can be placed here. This name could also
200			* be changed to null for utility classes.
201			*/
202			private String _name = FilterMain.NAME;
203
204			/**
205			* This holds a reference to the
206			* system logger that is being used.
207			*/
208			private Logger _logger = ReferenceManager.getInstance().getLogger();
209
210			/**
211			* The socket we are talking on
212			*/
213	tdb	1.1	Socket _socket;
214	ajm	1.10
215			/**
216			* The input from the socket
217			*/
218	tdb	1.1	BufferedReader _socketIn;
219	ajm	1.10
220			/**
221			* The output from the socket
222			*/
223	tdb	1.1	PrintWriter _socketOut;
224	ajm	1.10
225			/**
226	tdb	1.11	* A reference to our Queue
227	ajm	1.10	*/
228	tdb	1.11	Queue _queue;
229	tdb	1.27
230	tdb	1.1	//---STATIC ATTRIBUTES---
231
232			}