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 ;)
#	User	Rev	Content
1	tdb	1.9	/*
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	ab11	1.2	//---PACKAGE DECLARATION---
21
22			//---IMPORTS---
23
24	ab11	1.1	import java.net.*;
25			import java.util.*;
26			import java.io.*;
27
28	ab11	1.2	/**
29			* Configurator object for the JavaHost
30	tdb	1.5	* Will connect to the filter manager and collect its specific
31	ab11	1.2	* configuration
32			*
33	tdb	1.9	* @author $Author: ab11 $
34			* @version $Id: Config.java,v 1.8 2001/03/19 17:38:41 ab11 Exp $
35	ab11	1.2	*/
36	ab11	1.1	class Config {
37
38	ab11	1.2	//---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	ab11	1.3	System.out.println("Reading Config file");
52	ab11	1.2	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	ab11	1.3	aList.add(numProperties, tmpIn);
58	ab11	1.2	numProperties++;
59			tmpIn = inFile.readLine();
60			}
61	ab11	1.3	System.out.println("Added "+numProperties+" properties");
62	ab11	1.2	}
63			catch ( FileNotFoundException e ){
64			// do something
65	ab11	1.3	System.out.println("Config file not found");
66	ab11	1.2	}
67			catch ( IOException e ){
68			// do something
69			}
70
71	ab11	1.3	myProperties = new HashMap();
72			configChanged = false;
73
74	ab11	1.4	// time in seconds before first retry
75			filterManagerRetryTime = 10;
76	ab11	1.3
77	ab11	1.2	// do the funky jibble
78			connect(serverName, serverPort);
79			}
80
81			//---PUBLIC METHODS---
82
83			public InetAddress getFilterName(){
84	tdb	1.6	// will return the most recent IP address (if it is dynamic for whatever reason)
85	ab11	1.2	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	tdb	1.6	* @return an integer corresponding to the UDP port of the filter
99	ab11	1.2	*/
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	tdb	1.6	* @return an integer corresponding to the TCP of the filter
109	ab11	1.2	*/
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	ab11	1.3	configChanged = false;
139
140	tdb	1.5	System.out.println("Establishing connection with filter manager");
141	ab11	1.2
142			// might throw a UnknownHostException
143			try {
144	ab11	1.3	mySocket = new Socket( serverName, serverPort );
145			// ok we have our socket connected ok. grab their input and output streams
146	ab11	1.2	socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
147			socketOut = new PrintWriter(mySocket.getOutputStream());
148	ab11	1.3
149			if (sendCommand("STARTCONFIG").equals("OK")){
150	ab11	1.2	// everything is fine
151	ab11	1.3	// sendCommand("LASTMODIFIED");
152			lastModified = sendCommand("LASTMODIFIED");
153	ab11	1.8
154			fileList = sendCommand("FILELIST");
155	ab11	1.2
156	ab11	1.8	fQDN = sendCommand("FQDN");
157	ab11	1.2	// get all the properties
158	ab11	1.3	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	ab11	1.2	}
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	ab11	1.4
173	ab11	1.2	sendCommand("END");
174	ab11	1.3
175	ab11	1.2	}
176	ab11	1.3
177	ab11	1.2
178			// close the socket
179			mySocket.close();
180	tdb	1.5	System.out.println("Completed communication with filter manager");
181	ab11	1.2
182			}
183			catch ( UnknownHostException e ){
184	ab11	1.3	// what to do
185			System.out.println("Host not found");
186	ab11	1.2	}
187			catch ( IOException e ){
188			// what to do
189	ab11	1.3	System.out.println("Unable to read from socket, might not be open");
190	ab11	1.4	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	ab11	1.2	}
203
204			} // connect
205
206
207	ab11	1.3	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	ab11	1.4	System.out.println("Re-establishing contact with filter manager");
237			configChanged = true;
238	ab11	1.3	}
239			}
240
241	ab11	1.2	private String sendCommand(String command){
242
243	ab11	1.3	// System.out.println("Writing command: "+command);
244	ab11	1.2	socketOut.println(command);
245	ab11	1.3	socketOut.flush();
246	ab11	1.2	try {
247	ab11	1.3	String response = socketIn.readLine();
248			// System.out.println("Got: "+response);
249			return response;
250	ab11	1.2	}
251			catch ( IOException e ){
252			// something went wrong
253	ab11	1.3	System.out.println("Error recieving response");
254	ab11	1.2	return "ERROR";
255			}
256			}
257
258			//---ACCESSOR/MUTATOR METHODS---
259
260	ab11	1.3	public boolean reloadConfig(){
261			return configChanged;
262			}
263
264	ab11	1.2	//---ATTRIBUTES---
265
266	ab11	1.3	private boolean configChanged;
267	ab11	1.2	private String lastModified;
268	ab11	1.3	private String fileList;
269	ab11	1.8	private String fQDN;
270	ab11	1.2	private int numProperties;
271	ab11	1.3	private HashMap myProperties;
272	ab11	1.2	private String filterName;
273			private int filterUDPPort;
274			private int filterTCPPort;
275			private ArrayList aList;
276			private BufferedReader socketIn;
277			private PrintWriter socketOut;
278	ab11	1.4	private int filterManagerRetryTime;
279	ab11	1.2
280
281
282			//---STATIC ATTRIBUTES---
283	ab11	1.1
284	tdb	1.7	} // class