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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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package org.jboss.test.remoting.util;
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import org.jboss.remoting.transport.PortUtil;
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import junit.framework.TestCase;
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import EDU.oswego.cs.dl.util.concurrent.SynchronizedInt;
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* @author <a href="mailto:tom.elrod@jboss.com">Tom Elrod</a>
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public class PortUtilTestCase extends TestCase
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private byte[] portArray = null;
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private static SynchronizedInt counter = new SynchronizedInt(0);
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private static SynchronizedInt countToWait = new SynchronizedInt(0);
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private static int errorPort = 0;
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private static boolean error = false;
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private String host = "localhost";
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//private String host = "192.168.1.202";
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portArray = new byte[65536];
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public void testFindingFreePorts()
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int maxWaitNumber = 20;
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int numOfThreads = 100;
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for(int x = 0; x < numOfThreads; x++)
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new Thread(new Runnable()
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int port = PortUtil.findFreePort(host);
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System.out.println("port found: " + port);
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byte portVal = portArray[port];
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portArray[port] = portFlag;
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assertEquals("Found port already in use: " + port, 0, portVal);
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assertTrue("Error: " + e.getMessage(), false);
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while(counter.get() < numOfThreads && !error)
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countToWait.increment();
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if(countToWait.get() > maxWaitNumber)
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Thread.currentThread().sleep(1000);
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catch(InterruptedException e)
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System.out.println("counter: " + counter);
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assertTrue("Error in getting free port (duplicate port = " + errorPort + ")", false);
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if(countToWait.get() >= maxWaitNumber)
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assertTrue("Error in getting free port. Never got to error or reached number of counts.", false);
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