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.
#	Content
1	//---PACKAGE DECLARATION---
2	package uk.org.iscream.cms.server.filter;
3
4	//---IMPORTS---
5	import uk.org.iscream.cms.server.core.*;
6	import uk.org.iscream.cms.server.filter.*;
7	import uk.org.iscream.cms.server.componentmanager.*;
8	import java.net.Socket;
9	import java.io.*;
10	import java.util.Random;
11	import uk.org.iscream.cms.server.util.*;
12
13	/**
14	* This provides Host heartbeat functionality
15	*
16	* @author $Author: tdb $
17	* @version $Id: TCPReaderInit.java,v 1.27 2002/03/21 17:44:51 tdb Exp $
18	*/
19	class TCPReaderInit extends Thread {
20
21	//---FINAL ATTRIBUTES---
22
23	/**
24	* The current CVS revision of this class
25	*/
26	public final String REVISION = "$Revision: 1.27 $";
27
28	//---STATIC METHODS---
29
30	//---CONSTRUCTORS---
31
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	public TCPReaderInit(Socket socket, Queue queue) throws IOException {
40	// set the Thread name
41	setName("filter.TCPReaderInit");
42
43	_socket = socket;
44	_queue = queue;
45	// setup the reader & writer
46	_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream()));
47	_socketOut = new PrintWriter(_socket.getOutputStream(), true);
48	_logger.write(toString(), Logger.SYSINIT, "created");
49	}
50
51	//---PUBLIC METHODS---
52
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	public void run() {
59	try {
60	// 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
67	// try for HEARTBEAT
68	getInBound("HEARTBEAT");
69	_socketOut.println("OK");
70
71	// 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	}
112
113	// respond to ENDHEARTBEAT
114	_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
119	// run the service checks for this host
120	_logger.write(toString(), Logger.DEBUG, "Running service checks");
121	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	_queue.add(xml);
128
129	} catch (Exception e) {
130	_logger.write(toString(), Logger.ERROR, "ERROR: " + e);
131	}
132
133	// Disconnect streams & socket
134	try {
135	_socketIn.close();
136	_socketOut.close();
137	_socket.close();
138	} catch (IOException e) {
139	_logger.write(toString(), Logger.ERROR, "exception on socket close");
140	}
141	_logger.write(toString(), Logger.DEBUG, "finished");
142	}
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	* This uses the uk.org.iscream.cms.server.util.NameFormat class
149	* to format the toString()
150	*
151	* @return the name of this class and its CVS revision
152	*/
153	public String toString() {
154	return FormatName.getName(
155	_name,
156	getClass().getName(),
157	REVISION);
158	}
159
160	//---PRIVATE METHODS---
161
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	throw new IOException("protocol error from "+_socket.getInetAddress().getHostName()+" - expected:"+expected+" got:" + inBound);
168	}
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
184	//---ACCESSOR/MUTATOR METHODS---
185
186	//---ATTRIBUTES---
187
188	/**
189	* A reference to the configuration manager
190	*/
191	ConfigurationManager _configManager = ReferenceManager.getInstance().getCM();
192
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	Socket _socket;
214
215	/**
216	* The input from the socket
217	*/
218	BufferedReader _socketIn;
219
220	/**
221	* The output from the socket
222	*/
223	PrintWriter _socketOut;
224
225	/**
226	* A reference to our Queue
227	*/
228	Queue _queue;
229
230	//---STATIC ATTRIBUTES---
231
232	}