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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.clientinterface; |
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|
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.util.*; |
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import uk.ac.ukc.iscream.componentmanager.*; |
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import uk.ac.ukc.iscream.core.*; |
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import java.net.Socket; |
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import java.net.ServerSocket; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.io.IOException; |
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import java.io.BufferedReader; |
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import java.io.PrintWriter; |
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import java.io.InputStreamReader; |
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|
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|
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/** |
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* Acts as a Control Handler to a TCP based client. |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: TCPControlHandler.java,v 1.3 2001/01/22 23:08:15 tdb1 Exp $ |
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*/ |
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class TCPControlHandler extends Thread { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.3 $"; |
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|
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public static final String PROTOVER = "PROTOCOL 1.1"; |
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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 TCPControlHandler(Socket socket, PacketSorter ps) throws IOException { |
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_socket = socket; |
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_ps = ps; |
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_socketIn = new BufferedReader(new InputStreamReader(_socket.getInputStream())); |
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_socketOut = new PrintWriter(_socket.getOutputStream()); |
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_hostList = ""; |
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_logger.write(toString(), Logger.SYSINIT, "created"); |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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public void run() { |
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boolean run = true; |
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// lets init some communications with the client |
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try { |
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_socketOut.println(PROTOVER); |
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_socketOut.flush(); |
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_clientName = _socketIn.readLine(); |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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} |
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catch(IOException e) { |
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_logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending"); |
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run=false; |
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} |
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|
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_logger.write(toString(), Logger.SYSMSG, "Client has connected: "+_clientName); |
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|
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while(run) { |
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try { |
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String cmd = _socketIn.readLine(); |
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if(cmd.equals("STARTCONFIG")) { |
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Configuration myConfig = _configManager.getConfiguration("Client."+_clientName); |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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// get properties |
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cmd = _socketIn.readLine(); |
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while(!cmd.equals("ENDCONFIG")) { |
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// get the property |
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try { |
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String returnedProperty = myConfig.getProperty("Client."+cmd); |
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_socketOut.println(returnedProperty); |
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_socketOut.flush(); |
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|
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} catch (org.omg.CORBA.MARSHAL e) { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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} |
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cmd = _socketIn.readLine(); |
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} |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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_logger.write(toString(), Logger.SYSMSG, "Client has been configured"); |
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|
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} |
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else if(cmd.equals("STARTDATA")) { |
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if(_dataHandler == null) { |
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// create a serversocket |
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ServerSocket ss = new ServerSocket(0); |
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// get the port |
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int port = ss.getLocalPort(); |
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// tell the client |
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_socketOut.println(port); |
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_socketOut.flush(); |
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// call accept() |
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Socket s = ss.accept(); |
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// when we get the Socket back, give it to the data thread |
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TCPDataHandler dh = new TCPDataHandler(s); |
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// register it ! |
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_ps.register(dh.getQueue(), _hostList); |
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// start it up |
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dh.start(); |
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// HOLD a ref to that data thread |
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_dataHandler = dh; |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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_logger.write(toString(), Logger.SYSMSG, "Data stream started at Clients Request on port: "+port); |
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} |
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else { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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} |
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} |
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else if(cmd.equals("STOPDATA")) { |
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if(_dataHandler != null) { |
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// Shut down the data handler |
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_dataHandler.shutdown(); |
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// Deregister |
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_ps.deregister(_dataHandler.getQueue(), _hostList); |
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// destroy the reference to it ? |
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_dataHandler = null; |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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_logger.write(toString(), Logger.SYSMSG, "Data stream stopped at Clients Request"); |
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} |
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else { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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} |
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} |
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else if(cmd.equals("SETHOSTLIST")) { |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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cmd = _socketIn.readLine(); |
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_hostList = cmd; |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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} |
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else if(cmd.equals("DISCONNECT")) { |
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run=false; |
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if(_dataHandler != null) { |
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// Shut down the data handler |
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_dataHandler.shutdown(); |
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// destroy the reference to it ? |
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_dataHandler = null; |
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_logger.write(toString(), Logger.SYSMSG, "Data stream stopped at Clients Request"); |
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} |
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_socketOut.println("OK"); |
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_socketOut.flush(); |
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_socketIn.close(); |
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_socketOut.close(); |
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_socket.close(); |
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_logger.write(toString(), Logger.SYSMSG, "Closing at Clients Request"); |
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} |
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else { |
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_socketOut.println("ERROR"); |
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_socketOut.flush(); |
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} |
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} |
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catch(IOException e) { |
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_logger.write(toString(), Logger.FATAL, "Fatal error, shutdown pending"); |
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} |
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} |
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} |
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|
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = ClientInterfaceMain.NAME; |
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|
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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|
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/** |
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* A reference to the Configuration Manager the system is using |
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*/ |
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private ConfigurationManager _configManager = ReferenceManager.getInstance().getCM(); |
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|
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|
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/** |
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* The socket we are talking on |
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*/ |
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private Socket _socket; |
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|
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/** |
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* A hook to the inbound data from the socket |
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*/ |
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private BufferedReader _socketIn; |
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|
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/** |
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* A hook to the outbound stream for the socket |
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*/ |
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private PrintWriter _socketOut; |
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|
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/** |
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* A reference to the PacketSorter. |
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*/ |
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private PacketSorter _ps; |
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|
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private TCPDataHandler _dataHandler; |
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|
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private String _clientName; |
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private String _hostList; |
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|
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//---STATIC ATTRIBUTES--- |
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|
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} |
