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//---PACKAGE DECLARATION--- |
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|
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//---IMPORTS--- |
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import java.net.*; |
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import java.util.*; |
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import java.io.*; |
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|
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/** |
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* Configurator object for the JavaHost |
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* Will connect to the configurator manager and collect its specific |
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* configuration |
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* |
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* @author $Author: ab11 $ |
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* @version $Id: Config.java,v 1.2 2000/11/27 20:36:13 ab11 Exp $ |
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*/ |
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class Config { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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public Config( String serverName, int serverPort ){ |
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// takes in the master config settings and creates a connection with |
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// this computer, and downloads all the values listed in config.values.txt |
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// which should be in the local directory |
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|
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// read in from the file. |
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try { |
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System.out.println("Reading Config file"); |
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BufferedReader inFile = new BufferedReader(new FileReader("config.values.txt")); |
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aList = new ArrayList(); |
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numProperties = 0; |
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String tmpIn = inFile.readLine(); |
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while ( tmpIn != null ){ |
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aList.add(numProperties, tmpIn); |
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numProperties++; |
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tmpIn = inFile.readLine(); |
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} |
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System.out.println("Added "+numProperties+" properties"); |
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} |
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catch ( FileNotFoundException e ){ |
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// do something |
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System.out.println("Config file not found"); |
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} |
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catch ( IOException e ){ |
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// do something |
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} |
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|
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myProperties = new HashMap(); |
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configChanged = false; |
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|
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|
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// do the funky jibble |
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connect(serverName, serverPort); |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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public InetAddress getFilterName(){ |
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// will return the most recient IP address (if it is dynamic for whatever reason |
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try { |
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return InetAddress.getByName(filterName); |
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} |
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catch ( UnknownHostException e ){ |
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// do something |
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return null; |
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} |
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|
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} |
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|
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/** |
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* Used to retrieve the port to send UDP packets to on the filter |
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* |
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* @return an integer corrisponding to the UDP port of the filter |
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*/ |
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public int getFilterUDPPort(){ |
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|
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return filterUDPPort; |
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} |
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|
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/** |
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* Used to retrieve the port to send TCP heartbeats to on the filter |
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* |
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* @return an integer corrisponding to the TCP of the filter |
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*/ |
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public int getFilterTCPPort(){ |
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|
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return filterTCPPort; |
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} |
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|
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/** |
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* Used to get the hostname of the filter we are to talk to. |
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* |
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* @return a string representing the hostname of the filter |
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*/ |
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public String getProperty( String name ){ |
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|
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if ( myProperties.containsKey(name) ){ |
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// its in there, may return ERROR |
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return (String) myProperties.get(name); |
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} |
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else |
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{ |
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// can't have been in the config.values.txt file! |
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return "ERROR"; |
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} |
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} |
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|
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//---PRIVATE METHODS--- |
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private void connect( String serverName, int serverPort ){ |
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Socket mySocket; |
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configChanged = false; |
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|
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System.out.println("Establishing connection with config manager"); |
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|
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// might throw a UnknownHostException |
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try { |
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mySocket = new Socket( serverName, serverPort ); |
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// ok we have our socket connected ok. grab their input and output streams |
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socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream())); |
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socketOut = new PrintWriter(mySocket.getOutputStream()); |
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|
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if (sendCommand("STARTCONFIG").equals("OK")){ |
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// everything is fine |
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// sendCommand("LASTMODIFIED"); |
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lastModified = sendCommand("LASTMODIFIED"); |
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|
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fileList = sendCommand("FILELIST"); |
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// get all the properties |
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if ( numProperties > 0 ){ |
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// sendCommand("CONFIG"); |
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for ( int i = 0; i < numProperties; i++ ){ |
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String property = (String) aList.get(i); |
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myProperties.put(property, sendCommand(property)); |
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} |
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} |
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|
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sendCommand("ENDCONFIG"); |
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String filter_data = sendCommand("FILTER"); |
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StringTokenizer tok = new StringTokenizer(filter_data,";"); |
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filterName = tok.nextToken(); |
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filterUDPPort = Integer.parseInt(tok.nextToken()); |
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filterTCPPort = Integer.parseInt(tok.nextToken()); |
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|
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sendCommand("END"); |
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|
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} |
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|
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|
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// close the socket |
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mySocket.close(); |
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System.out.println("Completed communication with config manager"); |
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|
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} |
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catch ( UnknownHostException e ){ |
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// what to do |
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System.out.println("Host not found"); |
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} |
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catch ( IOException e ){ |
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// what to do |
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System.out.println("Unable to read from socket, might not be open"); |
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} |
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|
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} // connect |
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|
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|
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public void sendHeartBeat(){ |
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|
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Socket mySocket; |
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try { |
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|
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mySocket = new Socket( filterName, filterTCPPort ); |
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// ok we have our socket connected ok. grab their input and output streams |
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socketIn = new BufferedReader(new InputStreamReader(mySocket.getInputStream())); |
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socketOut = new PrintWriter(mySocket.getOutputStream()); |
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|
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|
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if ( sendCommand("HEARTBEAT").equals("OK") ){ |
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if ( sendCommand("CONFIG").equals("OK") ){ |
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sendCommand(fileList); |
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if ( sendCommand(lastModified).equals("ERROR") ){ |
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// config has changed |
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configChanged = true; |
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} |
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sendCommand("ENDHEARTBEAT"); |
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} |
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} |
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} |
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catch ( UnknownHostException e ){ |
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// what to do |
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System.out.println("Host not found"); |
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} |
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catch ( IOException e ){ |
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// what to do |
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System.out.println("Unable to read from socket, might not be open"); |
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} |
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} |
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|
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private String sendCommand(String command){ |
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|
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// System.out.println("Writing command: "+command); |
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socketOut.println(command); |
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socketOut.flush(); |
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try { |
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String response = socketIn.readLine(); |
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// System.out.println("Got: "+response); |
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return response; |
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} |
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catch ( IOException e ){ |
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// something went wrong |
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System.out.println("Error recieving response"); |
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return "ERROR"; |
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} |
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} |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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public boolean reloadConfig(){ |
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return configChanged; |
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} |
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|
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//---ATTRIBUTES--- |
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|
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private boolean configChanged; |
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private String lastModified; |
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private String fileList; |
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private int numProperties; |
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private HashMap myProperties; |
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private String filterName; |
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private int filterUDPPort; |
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private int filterTCPPort; |
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private ArrayList aList; |
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private BufferedReader socketIn; |
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private PrintWriter socketOut; |
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|
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|
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|
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//---STATIC ATTRIBUTES--- |
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|
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} // class |
