/* ***************************************************************************** * $Id: ConnectServiceTest.java,v 1.2 2003/05/05 22:49:50 jheiss Exp $ ***************************************************************************** * Performs simple TCP connection service test ***************************************************************************** * Copyright 2003 Jason Heiss *  * This file is part of Distributor. *  * Distributor 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. *  * Distributor 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 Distributor; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA ***************************************************************************** */package oss.distributor;import java.io.*;import java.net.Socket;import java.util.List;import java.util.Iterator;import java.util.logging.Logger;import org.w3c.dom.Element;class ConnectServiceTest implements Runnable{	Distributor distributor;	Logger logger;	int frequency;  // How often should the test be done?	int timeout;  // How long do we wait for the test to complete before	              // deciding that it has failed?	Thread thread;	/*	 * Because the service tests are instantiated via Class.forName(),	 * they must have public constructors.	 */	public ConnectServiceTest(Distributor distributor, Element configElement)	{		this.distributor = distributor;		logger = distributor.getLogger();		frequency = 60000;  // Default of 60s		try		{			frequency =				Integer.parseInt(configElement.getAttribute("frequency"));		}		catch (NumberFormatException e)		{			logger.warning("Invalid frequency, using default:  " +				e.getMessage());		}		logger.config("Test frequency:  " + frequency);		timeout = 2000;  // Default of 2s		try		{			timeout =				Integer.parseInt(configElement.getAttribute("timeout"));		}		catch (NumberFormatException e)		{			logger.warning("Invalid timeout, using default:  " +				e.getMessage());		}		logger.config("Test timeout:  " + timeout);		thread = new Thread(this, getClass().getName());		thread.start();	}	public void run()	{		List targets;		Iterator i;		Target target;		boolean result;		while (true)		{			targets = distributor.getTargets();			// distributor.getTargets() constructs a new List, puts			// all of the Targets into it, and returns it.  As such, we			// don't have to worry about holding everything else up by			// synchronizing on the list for a long time (the testing			// could take many seconds).  In fact, we really don't have			// to synchronize at all since we're the only ones with a			// reference to that list, but we do anyway for consistency.			synchronized (targets)			{				i = targets.iterator();				while (i.hasNext())				{					try					{						target = (Target) i.next();						ConnectBackgroundTest connectTest =							new ConnectBackgroundTest(target);						synchronized (connectTest)						{							connectTest.startTest();							connectTest.wait(timeout);						}						if (connectTest.getResult() ==							BackgroundTest.RESULT_SUCCESS)						{							result = true;						}						else						{							result = false;							if (connectTest.getResult() ==								BackgroundTest.RESULT_NOTFINISHED)							{								logger.warning("Test timed out");							}						}						if (result && ! target.isEnabled())						{							// I was tempted to log this at info but							// if someone has their log level set to							// warning then they'd only see the disable							// messages and not the enable messages.							logger.warning("Enabling: " + target);							target.enable();						}						else if (! result && target.isEnabled())						{							logger.warning("Disabling: " + target);							target.disable();						}					}					catch (InterruptedException e)					{						logger.warning("Service test interrupted");					}				}			}			try			{				Thread.sleep(frequency);			} catch (InterruptedException e) {}		}	}	class ConnectBackgroundTest extends BackgroundTest	{		protected ConnectBackgroundTest(Target target)		{			super(target);		}		public void test()		{			try			{				Socket sock = new Socket(					target.getInetAddress(),					target.getPort());				sock.close();				success = true;				finished = true;				synchronized (this)				{					notify();				}			}			catch (IOException e)			{				logger.warning("Error communicating with server: " +					e.getMessage());				return;			}		}	}}