1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portlet.network.util;
24  
25  import com.liferay.portal.kernel.util.Time;
26  import com.liferay.portal.kernel.webcache.WebCacheException;
27  import com.liferay.portal.kernel.webcache.WebCacheItem;
28  import com.liferay.portlet.network.model.DNSLookup;
29  
30  import java.net.InetAddress;
31  
32  /**
33   * <a href="DNSLookupWebCacheItem.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Brian Wing Shun Chan
36   *
37   */
38  public class DNSLookupWebCacheItem implements WebCacheItem {
39  
40      public DNSLookupWebCacheItem(String domain) {
41          _domain = domain;
42      }
43  
44      public Object convert(String key) throws WebCacheException {
45          DNSLookup dnsLookup = null;
46  
47          try {
48              String results = null;
49  
50              char[] array = _domain.trim().toCharArray();
51  
52              for (int i = 0; i < array.length; i++) {
53                  if ((array[i] != '.') && !Character.isDigit(array[i])) {
54                      InetAddress ia = InetAddress.getByName(_domain);
55  
56                      results = ia.getHostAddress();
57  
58                      break;
59                  }
60              }
61  
62              if (results == null) {
63                  StringBuilder sb = new StringBuilder();
64  
65                  InetAddress[] ia = InetAddress.getAllByName(_domain);
66  
67                  for (int i = 0; i < ia.length; i++) {
68                      sb.append(ia[i].getHostName());
69  
70                      if (i + 1 <= ia.length) {
71                          sb.append(",");
72                      }
73                  }
74  
75                  results = sb.toString();
76              }
77  
78              dnsLookup = new DNSLookup(_domain, results);
79          }
80          catch (Exception e) {
81              throw new WebCacheException(_domain + " " + e.toString());
82          }
83  
84          return dnsLookup;
85      }
86  
87      public long getRefreshTime() {
88          return _REFRESH_TIME;
89      }
90  
91      private static final long _REFRESH_TIME = Time.DAY;
92  
93      private String _domain;
94  
95  }