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1   package org.apache.jcs.utils.net;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import java.net.InetAddress;
23  import java.net.UnknownHostException;
24  
25  import org.apache.commons.logging.Log;
26  import org.apache.commons.logging.LogFactory;
27  
28  /***
29   * Simple utility for getting the local host name.
30   * <p>
31   * @author Aaron Smuts
32   */
33  public class HostNameUtil
34  {
35      private final static Log log = LogFactory.getLog( HostNameUtil.class );
36  
37      /***
38       * Gets the address for the local machine.
39       * <p>
40       * @return InetAddress.getLocalHost().getHostAddress(), or unknown if there
41       *         is an error.
42       */
43      public static String getLocalHostAddress()
44      {
45          String hostAddress = "unknown";
46          try
47          {
48              // todo, you should be able to set this
49              hostAddress = InetAddress.getLocalHost().getHostAddress();
50              if ( log.isDebugEnabled() )
51              {
52                  log.debug( "hostAddress = [" + hostAddress + "]" );
53              }
54          }
55          catch ( UnknownHostException e1 )
56          {
57              log.error( "Couldn't get localhost address", e1 );
58          }
59          return hostAddress;
60      }
61  }