src/java/org/apache/ivy/util/HostUtil.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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
 *
 *      https://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.apache.ivy.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * This class contains basic helper methods for the Host.
 *
 */
public final class HostUtil {

    private static String localHostName = null;

    /**
     * This default constructor is to hide this class from initialization through other classes.
     */
    private HostUtil() {
    }

    /**
     * This method returns the name of the current Host, if this name cannot be determined,
     * localhost will be returned.
     *
     * @return The name of the current "local" Host.
     */
    public static String getLocalHostName() {
        if (localHostName == null) {
            try {
                localHostName = InetAddress.getLocalHost().getHostName();
            } catch (UnknownHostException e) {
                localHostName = "localhost";
            }
        }
        return localHostName;
    }
}