Brent Sordyl's blog

import gnu.getopt.Getopt;
import java.io.IOException;
import java.util.ArrayList;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.naming.CommunicationException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.jboss.security.SecurityAssociation;
import org.jboss.security.SimplePrincipal;

/**
 *
 * Install growl and growlnotify http://growl.info/extras.php#growlnotify
 *
 * usage: Growler [options]
 * -u <name>    	Specify the username for authentication
 * -p <name>    	Specify the password for authentication
 * -s    			Use sticky growl notification windows
 * -i <filepath>	The location of the JBoss Developer Studio .ico file
 *
 * @author <a href="mailto:brent.sordyl@amentra.com">Brent Sordyl</a>
 */
public class Growler {

	// Use sensible defaults for all properties
	private String username = "admin";
	private String password = "admin";
	private int pollingFrequency = 3;
	private String jbdsIconLocation = "/Applications/jbds/eclipse/jbds.ico";
	private String growlTitle = "JBoss Application Server";
	private String serverStartedMessage = "Server Started";
	private String serverShutdownMessage = "Server is shutting down";
	private boolean stickyGrowlNotifications = false;
	private String jndiUrl = "jnp://localhost:1099";

	public Growler(String[] args) {
		processArguments(args);
	}

	/**
	 * The main method that checks for changes in
	 * server state and sends growl notifications.
	 *
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		Growler g = new Growler(args);
		boolean lastStatus = false;

		while (true) {
			try{
				boolean currentStatus = g.isJBoss5Up();
				if ( (currentStatus != lastStatus) && currentStatus) {
					sendNotification(g.growlTitle, g.serverStartedMessage,  g.jbdsIconLocation, g.stickyGrowlNotifications);
				} else if (currentStatus != lastStatus) {
					sendNotification(g.growlTitle, g.serverShutdownMessage, g.jbdsIconLocation, g.stickyGrowlNotifications);
				}

				lastStatus = currentStatus;
				Thread.sleep(g.pollingFrequency * 1000);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * Checks if the JBoss 5 server is up, this
	 * will need to change for JBoss 6 per
	 * http://community.jboss.org/wiki/WhichRemoteInterfaceShouldIUseForTheMBeanServer
	 *
	 * @return true, if is server up
	 * @throws Exception the exception
	 */
	private boolean isJBoss5Up() throws Exception
	{
		boolean up = false;
		try {
			SecurityAssociation.setPrincipal(new SimplePrincipal(username));
			SecurityAssociation.setCredential(password);

	    	System.setProperty("java.naming.provider.url", jndiUrl);
		  	System.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
	    	System.setProperty("java.naming.provider.url.pkgs", "org.jboss.naming");
	    	System.setProperty("java.naming.provider.url.pkgs", "org.jnp.interfaces");

			InitialContext ctx = new InitialContext();
			MBeanServerConnection server = (MBeanServerConnection) ctx.lookup("jmx/invoker/RMIAdaptor");
			up = Boolean.parseBoolean((server.getAttribute(new ObjectName("jboss.system:type=Server"), "Started")).toString());
		} catch (CommunicationException ce) {} 	// Exception expected when server is shutdown
		  catch (NamingException ne) {} 		// Exception expected when server is starting or stopping

		return up;
	}

	/**
	 * Sends a growl notification using growlnotify.
	 *
	 * @param title the title
	 * @param message the message
	 * @param jbdsIconLocation the jbds icon location
	 * @param sticky the sticky
	 */
	private static void sendNotification(String title, String message, String jbdsIconLocation, boolean sticky) {
		ArrayList<String> args = new ArrayList<String>();
		args.add("growlnotify");
		args.add("-m");
		args.add(message);
		args.add("--image");
		args.add(jbdsIconLocation);
		args.add("-t");
		args.add(title);
		if (sticky)
			args.add("-s");

		try {
			@SuppressWarnings("unused")
			Process exec = Runtime.getRuntime().exec( args.toArray(new String[] {}) );
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * Process command line arguments
	 * to override default values.
	 *
	 * @param args the command line args to parse
	 */
	private void processArguments(final String[] args) {
		try {
			String sopts = "u:p:i:s";
			Getopt getopt = new Getopt("Growler", args, sopts);
			int code;
			while ((code = getopt.getopt()) != -1) {
				switch (code) {
					case 'u':
						username = getopt.getOptarg();
						break;
					case 'p':
						password = getopt.getOptarg();
						break;
					case 's':
						stickyGrowlNotifications = true;
						break;
					case 'i':
						jbdsIconLocation = getopt.getOptarg();
						break;
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}