001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.util;
016    
017    import com.liferay.portal.kernel.exception.SystemException;
018    import com.liferay.portal.kernel.log.Log;
019    import com.liferay.portal.kernel.log.LogFactoryUtil;
020    
021    import java.net.Inet4Address;
022    import java.net.InetAddress;
023    import java.net.NetworkInterface;
024    import java.net.UnknownHostException;
025    
026    import java.util.Enumeration;
027    
028    /**
029     * @author Michael C. Han
030     * @author Shuyang Zhou
031     */
032    public class InetAddressUtil {
033    
034            public static String getLocalHostName() throws Exception {
035                    return LocalHostNameHolder._localHostName;
036            }
037    
038            public static InetAddress getLocalInetAddress() throws Exception {
039                    String clusterNodeListenAddress = StringPool.BLANK;
040    
041                    try {
042                            clusterNodeListenAddress = GetterUtil.getString(
043                                    PropsUtil.get("cluster.node.listen.address"));
044                    }
045                    catch (Exception e) {
046                            if (_log.isDebugEnabled()) {
047                                    _log.debug(e, e);
048                            }
049                    }
050    
051                    if (Validator.isNotNull(clusterNodeListenAddress)) {
052                            InetAddress inetAddress = InetAddress.getByName(
053                                    clusterNodeListenAddress);
054    
055                            return inetAddress;
056                    }
057    
058                    Enumeration<NetworkInterface> enu1 =
059                            NetworkInterface.getNetworkInterfaces();
060    
061                    while (enu1.hasMoreElements()) {
062                            NetworkInterface networkInterface = enu1.nextElement();
063    
064                            Enumeration<InetAddress> enu2 = networkInterface.getInetAddresses();
065    
066                            while (enu2.hasMoreElements()) {
067                                    InetAddress inetAddress = enu2.nextElement();
068    
069                                    if (!inetAddress.isLoopbackAddress() &&
070                                            (inetAddress instanceof Inet4Address)) {
071    
072                                            return inetAddress;
073                                    }
074                            }
075                    }
076    
077                    throw new SystemException("No local internet address");
078            }
079    
080            public static InetAddress getLoopbackInetAddress()
081                    throws UnknownHostException {
082    
083                    return InetAddress.getByName("127.0.0.1");
084            }
085    
086            private static Log _log = LogFactoryUtil.getLog(InetAddressUtil.class);
087    
088            private static class LocalHostNameHolder {
089    
090                    private static final String _localHostName;
091    
092                    static {
093                            try {
094                                    InetAddress inetAddress = getLocalInetAddress();
095    
096                                    _localHostName = inetAddress.getHostName();
097                            }
098                            catch (Exception e) {
099                                    throw new ExceptionInInitializerError(e);
100                            }
101                    }
102    
103            }
104    
105    }