ca.brood.tunneller.Tunneller.java Source code

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Here is the source code for ca.brood.tunneller.Tunneller.java

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/*******************************************************************************
 * Copyright (c) 2013 Charles Hache <chalz@member.fsf.org>. All rights reserved. 
 * 
 * This file is part of the tunneller project.
 * tunneller 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 3 of the License, or
 * (at your option) any later version.
 * 
 * tunneller 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 tunneller.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     Charles Hache <chalz@member.fsf.org> - initial API and implementation
 ******************************************************************************/
package ca.brood.tunneller;

import java.util.ArrayList;

import org.apache.commons.daemon.Daemon;
import org.apache.commons.daemon.DaemonContext;
import org.apache.commons.daemon.DaemonInitException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import ca.brood.brootils.xml.XMLConfigurable;
import ca.brood.brootils.xml.XMLFileLoader;

public class Tunneller implements Daemon, XMLConfigurable {
    private static Tunneller tunnellerDaemon;

    private ArrayList<TunnelKeepaliveThread> tunnelThreads;
    private String configFile;
    private Logger log;

    static {
        tunnellerDaemon = new Tunneller();
    }

    public Tunneller() {
        tunnelThreads = new ArrayList<TunnelKeepaliveThread>();
        configFile = "tunneller.xml";
        log = LogManager.getLogger(Tunneller.class);
    }

    public static void main(String[] args) {
        //For testing
        Tunneller.windowsService(new String[0]);

        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        //To stop, uncomment this:
        String[] stop = new String[1];
        stop[0] = "stop";
        Tunneller.windowsService(stop);
    }

    private void tunnellerStart() {
        log.info("Tunneller is starting...");

        XMLFileLoader xmlLoader = new XMLFileLoader(configFile, this);

        boolean success = false;
        try {
            success = xmlLoader.load();
        } catch (Exception e) {
            log.fatal("Exception while loading config file: ", e);
        }

        if (success) {
            for (TunnelKeepaliveThread thread : tunnelThreads) {
                thread.start();
            }
        }
    }

    private void tunnellerStop() {
        log.info("Tunneller is stopping...");
        for (TunnelKeepaliveThread thread : tunnelThreads) {
            thread.stop();
        }
        log.info("Tunneller is done.");
    }

    @Override
    public boolean configure(Node rootNode) {
        NodeList nodes = rootNode.getOwnerDocument().getElementsByTagName("tunnel");

        if (nodes.getLength() == 0) {
            log.fatal("No tunneller configured");
            return false;
        }

        for (int i = 0; i < nodes.getLength(); i++) {
            TunnelKeepaliveThread newThread = new TunnelKeepaliveThread();
            if (!newThread.configure(nodes.item(i))) {
                log.fatal("Error configuring tunneller");
                return false;
            }
            tunnelThreads.add(newThread);
        }

        return true;
    }

    @Override
    public void destroy() {
        log.info("Linux daemon received destroy command");
    }

    @Override
    public void init(DaemonContext arg) throws DaemonInitException, Exception {
        /* I think if jsvc is configured correctly, then this method is 
           * called as the root user.  After it returns, then start is called
           * as the regular user.
           */
        //TODO: get an xml config file from the command line
        log.info("Linux daemon received init");
        for (String s : arg.getArguments()) {
            log.debug("Got argument: " + s);
        }
    }

    @Override
    public void start() throws Exception {
        log.info("Linux daemon received start command");
        tunnellerDaemon.tunnellerStart();
    }

    @Override
    public void stop() throws Exception {
        log.info("Linux daemon received stop command");
        tunnellerDaemon.tunnellerStop();
    }

    /**
      * Static method called by prunsrv to start/stop
      * the Windows service.  Pass the argument "start"
      * to start the service, and pass "stop" to
      * stop the service.
      * Stolen from FAQ at commons daemon.
      */
    public static void windowsService(String[] args) {
        String cmd = "start";
        if (args.length > 0) {
            cmd = args[0];
        }

        if ("start".equals(cmd)) {
            tunnellerDaemon.log.info("Windows service received Start command");
            tunnellerDaemon.tunnellerStart();
        } else if ("stop".equals(cmd)) {
            tunnellerDaemon.log.info("Windows service received Stop command");
            tunnellerDaemon.tunnellerStop();
        } else {
            tunnellerDaemon.log.error("Unrecognized service option: " + cmd);
        }
    }
}