org.nebula.service.core.HostAddress.java Source code

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Here is the source code for org.nebula.service.core.HostAddress.java

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/*
 * Copyright 2002-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.nebula.service.core;

import org.apache.http.conn.util.InetAddressUtils;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;

public class HostAddress {

    public static String getLocalHost() throws Exception {

        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface current = interfaces.nextElement();

            if (!current.isUp() || current.isLoopback() || current.isVirtual()) {
                continue;
            }
            Enumeration<InetAddress> addresses = current.getInetAddresses();
            while (addresses.hasMoreElements()) {
                InetAddress current_addr = addresses.nextElement();
                if (current_addr.isLoopbackAddress()
                        || !InetAddressUtils.isIPv4Address(current_addr.getHostAddress())) {
                    continue;
                }
                return current_addr.getHostName();
            }
        }

        throw new Exception("Failed to get local hostname");
    }

}