host/java/Config.java

/* 
 * i-scream central monitoring system
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

//---PACKAGE DECLARATION---

//---IMPORTS---

import java.net.*;
import java.util.*;
import java.io.*;

/**
 * Configurator object for the JavaHost
 * Will connect to the filter manager and collect its specific
 * configuration
 *
 * @author  $Author: ab11 $
 * @version $Id: Config.java,v 1.8 2001/03/19 17:38:41 ab11 Exp $
 */
class Config {

//---FINAL ATTRIBUTES---

//---STATIC METHODS---

//---CONSTRUCTORS---

    public Config( String serverName, int serverPort ){
        // takes in the master config settings and creates a connection with
        // this computer, and downloads all the values listed in config.values.txt
        // which should be in the local directory
        
        // read in from the file.
        try {
            System.out.println("Reading Config file");
            BufferedReader inFile = new BufferedReader(new FileReader("config.values.txt"));
            aList = new ArrayList();
            numProperties = 0;
            String tmpIn = inFile.readLine();
            while ( tmpIn != null ){
                aList.add(numProperties, tmpIn);
                numProperties++;
                tmpIn = inFile.readLine();  
            }
            System.out.println("Added "+numProperties+" properties");
        }
        catch ( FileNotFoundException e ){
            // do something
            System.out.println("Config file not found");
        }
        catch ( IOException e ){
            // do something
        }
    
        myProperties = new HashMap();
        configChanged = false;
        
        // time in seconds before first retry
        filterManagerRetryTime = 10;
    
        // do the funky jibble
        connect(serverName, serverPort);
    }

//---PUBLIC METHODS---

    public InetAddress getFilterName(){
        // will return the most recent IP address (if it is dynamic for whatever reason)
        try {
            return InetAddress.getByName(filterName);
        }
        catch ( UnknownHostException e ){
            // do something
            return null;
        }
        
    }
    
    /**
     * Used to retrieve the port to send UDP packets to on the filter
     *
     * @return an integer corresponding to the UDP port of the filter
     */
    public int getFilterUDPPort(){
        
        return filterUDPPort;
    }
    
    /**
     * Used to retrieve the port to send TCP heartbeats to on the filter
     *
     * @return an integer corresponding to the TCP of the filter
     */    
    public int getFilterTCPPort(){
        
        return filterTCPPort;
    }

    /**
     * Used to get the hostname of the filter we are to talk to.
     *
     * @return a string representing the hostname of the filter
     */
    public String getProperty( String name ){
        
        if ( myProperties.containsKey(name) ){
            // its in there, may return ERROR
            return (String) myProperties.get(name);
        }
        else
        {
            // can't have been in the config.values.txt file!
            return "ERROR";
        }
    }


//---PRIVATE METHODS---

    private void connect( String serverName, int serverPort ){
        Socket mySocket;
        configChanged = false;
        
        System.out.println("Establishing connection with filter manager");
        
        // might throw a UnknownHostException
        try {
            mySocket = new Socket( serverName, serverPort );
             // ok we have our socket connected ok. grab their input and output streams
            socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
            socketOut = new PrintWriter(mySocket.getOutputStream());
 
            if (sendCommand("STARTCONFIG").equals("OK")){
                // everything is fine
                // sendCommand("LASTMODIFIED");
                lastModified = sendCommand("LASTMODIFIED");
                     
                fileList = sendCommand("FILELIST");
                
                fQDN = sendCommand("FQDN");                
                // get all the properties
                if ( numProperties > 0 ){
                        // sendCommand("CONFIG");
                        for ( int i = 0; i < numProperties; i++ ){
                            String property = (String) aList.get(i);
                            myProperties.put(property, sendCommand(property));  
                        }
                }
                
                sendCommand("ENDCONFIG");
                String filter_data = sendCommand("FILTER");
                StringTokenizer tok = new StringTokenizer(filter_data,";");
                filterName = tok.nextToken();
                filterUDPPort = Integer.parseInt(tok.nextToken());
                filterTCPPort = Integer.parseInt(tok.nextToken());
                                    
                sendCommand("END");         
                 
            }
           
        
            // close the socket
            mySocket.close();
            System.out.println("Completed communication with filter manager");
        
        }
        catch ( UnknownHostException e ){
            // what to do   
            System.out.println("Host not found");    
        }
        catch ( IOException e ){
            // what to do 
            System.out.println("Unable to read from socket, might not be open");
            System.out.println("Retrying in "+filterManagerRetryTime+" seconds");
            configChanged = true;
            try {
                Thread.sleep(filterManagerRetryTime*1000);
            }
            catch( InterruptedException f ){
                System.out.println("Sleep interrupted");
            }
            filterManagerRetryTime = filterManagerRetryTime * 2;
            // warning this WILL cause a stack overflow after a while..
            // need to fix it.
            connect(serverName, serverPort);
        }
            
    } // connect


    public void sendHeartBeat(){
        
        Socket mySocket;
        try {
                 
                mySocket = new Socket( filterName, filterTCPPort );
                // ok we have our socket connected ok. grab their input and output streams
                socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
                socketOut = new PrintWriter(mySocket.getOutputStream());
         
                        
                if ( sendCommand("HEARTBEAT").equals("OK") ){
                        if ( sendCommand("CONFIG").equals("OK") ){
                                sendCommand(fileList);
                                if ( sendCommand(lastModified).equals("ERROR") ){
                                        // config has changed
                                        configChanged = true;
                                }
                                sendCommand("ENDHEARTBEAT");
                        }
                }       
        }
        catch ( UnknownHostException e ){
            // what to do   
            System.out.println("Host not found");    
        }
        catch ( IOException e ){
            // what to do 
            System.out.println("Unable to read from socket, might not be open");
            System.out.println("Re-establishing contact with filter manager");
            configChanged = true;
        }
    }

    private String sendCommand(String command){
        
        // System.out.println("Writing command: "+command);
        socketOut.println(command);
        socketOut.flush();
        try {
           String response = socketIn.readLine();
           // System.out.println("Got: "+response);
           return response;
        }
        catch ( IOException e ){
            // something went wrong
            System.out.println("Error recieving response");
            return "ERROR";   
        }
    }

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

    public boolean reloadConfig(){
        return configChanged;
    } 

//---ATTRIBUTES---

    private boolean configChanged;
    private String lastModified;
    private String fileList;
    private String fQDN;
    private int numProperties;
    private HashMap myProperties;
    private String filterName;
    private int filterUDPPort;
    private int filterTCPPort;
    private ArrayList aList;
    private BufferedReader socketIn;
    private PrintWriter socketOut;
    private int filterManagerRetryTime;
    

//---STATIC ATTRIBUTES---

} // class
Revision:	1.9
Committed:	Sat May 18 18:15:57 2002 UTC (22 years, 6 months ago) by tdb
Branch:	MAIN
Changes since 1.8:	+21 -2 lines
Log Message:	i-scream is now licensed under the GPL. I've added the GPL headers to every source file, and put a full copy of the license in the appropriate places. I think I've covered everything. This is going to be a mad commit ;)
#	Content
1	/*
2	* i-scream central monitoring system
3	* Copyright (C) 2000-2002 i-scream
4	*
5	* This program is free software; you can redistribute it and/or
6	* modify it under the terms of the GNU General Public License
7	* as published by the Free Software Foundation; either version 2
8	* of the License, or (at your option) any later version.
9	*
10	* This program is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	* GNU General Public License for more details.
14	*
15	* You should have received a copy of the GNU General Public License
16	* along with this program; if not, write to the Free Software
17	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18	*/
19
20	//---PACKAGE DECLARATION---
21
22	//---IMPORTS---
23
24	import java.net.*;
25	import java.util.*;
26	import java.io.*;
27
28	/**
29	* Configurator object for the JavaHost
30	* Will connect to the filter manager and collect its specific
31	* configuration
32	*
33	* @author $Author: ab11 $
34	* @version $Id: Config.java,v 1.8 2001/03/19 17:38:41 ab11 Exp $
35	*/
36	class Config {
37
38	//---FINAL ATTRIBUTES---
39
40	//---STATIC METHODS---
41
42	//---CONSTRUCTORS---
43
44	public Config( String serverName, int serverPort ){
45	// takes in the master config settings and creates a connection with
46	// this computer, and downloads all the values listed in config.values.txt
47	// which should be in the local directory
48
49	// read in from the file.
50	try {
51	System.out.println("Reading Config file");
52	BufferedReader inFile = new BufferedReader(new FileReader("config.values.txt"));
53	aList = new ArrayList();
54	numProperties = 0;
55	String tmpIn = inFile.readLine();
56	while ( tmpIn != null ){
57	aList.add(numProperties, tmpIn);
58	numProperties++;
59	tmpIn = inFile.readLine();
60	}
61	System.out.println("Added "+numProperties+" properties");
62	}
63	catch ( FileNotFoundException e ){
64	// do something
65	System.out.println("Config file not found");
66	}
67	catch ( IOException e ){
68	// do something
69	}
70
71	myProperties = new HashMap();
72	configChanged = false;
73
74	// time in seconds before first retry
75	filterManagerRetryTime = 10;
76
77	// do the funky jibble
78	connect(serverName, serverPort);
79	}
80
81	//---PUBLIC METHODS---
82
83	public InetAddress getFilterName(){
84	// will return the most recent IP address (if it is dynamic for whatever reason)
85	try {
86	return InetAddress.getByName(filterName);
87	}
88	catch ( UnknownHostException e ){
89	// do something
90	return null;
91	}
92
93	}
94
95	/**
96	* Used to retrieve the port to send UDP packets to on the filter
97	*
98	* @return an integer corresponding to the UDP port of the filter
99	*/
100	public int getFilterUDPPort(){
101
102	return filterUDPPort;
103	}
104
105	/**
106	* Used to retrieve the port to send TCP heartbeats to on the filter
107	*
108	* @return an integer corresponding to the TCP of the filter
109	*/
110	public int getFilterTCPPort(){
111
112	return filterTCPPort;
113	}
114
115	/**
116	* Used to get the hostname of the filter we are to talk to.
117	*
118	* @return a string representing the hostname of the filter
119	*/
120	public String getProperty( String name ){
121
122	if ( myProperties.containsKey(name) ){
123	// its in there, may return ERROR
124	return (String) myProperties.get(name);
125	}
126	else
127	{
128	// can't have been in the config.values.txt file!
129	return "ERROR";
130	}
131	}
132
133
134	//---PRIVATE METHODS---
135
136	private void connect( String serverName, int serverPort ){
137	Socket mySocket;
138	configChanged = false;
139
140	System.out.println("Establishing connection with filter manager");
141
142	// might throw a UnknownHostException
143	try {
144	mySocket = new Socket( serverName, serverPort );
145	// ok we have our socket connected ok. grab their input and output streams
146	socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
147	socketOut = new PrintWriter(mySocket.getOutputStream());
148
149	if (sendCommand("STARTCONFIG").equals("OK")){
150	// everything is fine
151	// sendCommand("LASTMODIFIED");
152	lastModified = sendCommand("LASTMODIFIED");
153
154	fileList = sendCommand("FILELIST");
155
156	fQDN = sendCommand("FQDN");
157	// get all the properties
158	if ( numProperties > 0 ){
159	// sendCommand("CONFIG");
160	for ( int i = 0; i < numProperties; i++ ){
161	String property = (String) aList.get(i);
162	myProperties.put(property, sendCommand(property));
163	}
164	}
165
166	sendCommand("ENDCONFIG");
167	String filter_data = sendCommand("FILTER");
168	StringTokenizer tok = new StringTokenizer(filter_data,";");
169	filterName = tok.nextToken();
170	filterUDPPort = Integer.parseInt(tok.nextToken());
171	filterTCPPort = Integer.parseInt(tok.nextToken());
172
173	sendCommand("END");
174
175	}
176
177
178	// close the socket
179	mySocket.close();
180	System.out.println("Completed communication with filter manager");
181
182	}
183	catch ( UnknownHostException e ){
184	// what to do
185	System.out.println("Host not found");
186	}
187	catch ( IOException e ){
188	// what to do
189	System.out.println("Unable to read from socket, might not be open");
190	System.out.println("Retrying in "+filterManagerRetryTime+" seconds");
191	configChanged = true;
192	try {
193	Thread.sleep(filterManagerRetryTime*1000);
194	}
195	catch( InterruptedException f ){
196	System.out.println("Sleep interrupted");
197	}
198	filterManagerRetryTime = filterManagerRetryTime * 2;
199	// warning this WILL cause a stack overflow after a while..
200	// need to fix it.
201	connect(serverName, serverPort);
202	}
203
204	} // connect
205
206
207	public void sendHeartBeat(){
208
209	Socket mySocket;
210	try {
211
212	mySocket = new Socket( filterName, filterTCPPort );
213	// ok we have our socket connected ok. grab their input and output streams
214	socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
215	socketOut = new PrintWriter(mySocket.getOutputStream());
216
217
218	if ( sendCommand("HEARTBEAT").equals("OK") ){
219	if ( sendCommand("CONFIG").equals("OK") ){
220	sendCommand(fileList);
221	if ( sendCommand(lastModified).equals("ERROR") ){
222	// config has changed
223	configChanged = true;
224	}
225	sendCommand("ENDHEARTBEAT");
226	}
227	}
228	}
229	catch ( UnknownHostException e ){
230	// what to do
231	System.out.println("Host not found");
232	}
233	catch ( IOException e ){
234	// what to do
235	System.out.println("Unable to read from socket, might not be open");
236	System.out.println("Re-establishing contact with filter manager");
237	configChanged = true;
238	}
239	}
240
241	private String sendCommand(String command){
242
243	// System.out.println("Writing command: "+command);
244	socketOut.println(command);
245	socketOut.flush();
246	try {
247	String response = socketIn.readLine();
248	// System.out.println("Got: "+response);
249	return response;
250	}
251	catch ( IOException e ){
252	// something went wrong
253	System.out.println("Error recieving response");
254	return "ERROR";
255	}
256	}
257
258	//---ACCESSOR/MUTATOR METHODS---
259
260	public boolean reloadConfig(){
261	return configChanged;
262	}
263
264	//---ATTRIBUTES---
265
266	private boolean configChanged;
267	private String lastModified;
268	private String fileList;
269	private String fQDN;
270	private int numProperties;
271	private HashMap myProperties;
272	private String filterName;
273	private int filterUDPPort;
274	private int filterTCPPort;
275	private ArrayList aList;
276	private BufferedReader socketIn;
277	private PrintWriter socketOut;
278	private int filterManagerRetryTime;
279
280
281
282	//---STATIC ATTRIBUTES---
283
284	} // class