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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;
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import java.io.IOException;
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import java.net.ServerSocket;
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import java.security.SecureRandom;
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import org.jboss.logging.Logger;
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* @author <a href="mailto:tom.elrod@jboss.com">Tom Elrod</a>
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private static final Logger log = Logger.getLogger(TestUtil.class);
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public static int getRandomPort()
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// validate port again, just in case two instances start on the port at same time.
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port = validatePort(port.intValue());
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return port.intValue();
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private static Integer getFreePort()
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Object o = new Object();
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String os = o.toString();
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os = os.substring(17);
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int n = Integer.parseInt(os, 16);
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int p = Math.abs(new SecureRandom(String.valueOf(System.currentTimeMillis() + n).getBytes()).nextInt(2000)) + 2000;
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return validatePort(p);
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private static Integer validatePort(int p)
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ServerSocket socket = null;
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socket = new ServerSocket(p);
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port = new Integer(p);
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log.debug("port " + p + " already in use. Will try another.");
b'\\ No newline at end of file'