| // Licensed to the Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE.txt 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 |
| // |
| // 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.apache.oodt.commons.net; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| |
| /** Network utilities. |
| * |
| * @author Kelly. |
| */ |
| public class Net { |
| /** Return the IP address of the "localhost" loopback address. |
| * |
| * @return The loopback IP address, 127.0.0.1. |
| */ |
| public static InetAddress getLoopbackAddress() { |
| return loopback; |
| } |
| |
| /** |
| * Return the IP address of the local host's primary IP interface. |
| * |
| * @return an <code>InetAddress</code> value. |
| */ |
| public static InetAddress getLocalHost() { |
| return localHost; |
| } |
| |
| /** The InetAddress of the loopback IP address, 127.0.0.1. */ |
| private static InetAddress loopback = null; |
| |
| /** The InetAddress of the local system's primary interface. */ |
| private static InetAddress localHost = null; |
| |
| /** Initialize this class. */ |
| static { |
| try { |
| loopback = InetAddress.getByName(null); |
| localHost = InetAddress.getLocalHost(); |
| } catch (UnknownHostException ex) { |
| System.err.println("FATAL ERROR: Cannot retrieve loopback or local address: " + ex.getMessage()); |
| System.exit(1); |
| } |
| } |
| } |