1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portlet.network.util;
21  
22  import com.liferay.portal.kernel.util.Time;
23  import com.liferay.portal.kernel.webcache.WebCacheException;
24  import com.liferay.portal.kernel.webcache.WebCacheItem;
25  import com.liferay.portlet.network.model.DNSLookup;
26  
27  import java.net.InetAddress;
28  
29  /**
30   * <a href="DNSLookupWebCacheItem.java.html"><b><i>View Source</i></b></a>
31   *
32   * @author Brian Wing Shun Chan
33   *
34   */
35  public class DNSLookupWebCacheItem implements WebCacheItem {
36  
37      public DNSLookupWebCacheItem(String domain) {
38          _domain = domain;
39      }
40  
41      public Object convert(String key) throws WebCacheException {
42          DNSLookup dnsLookup = null;
43  
44          try {
45              String results = null;
46  
47              char[] array = _domain.trim().toCharArray();
48  
49              for (int i = 0; i < array.length; i++) {
50                  if ((array[i] != '.') && !Character.isDigit(array[i])) {
51                      InetAddress ia = InetAddress.getByName(_domain);
52  
53                      results = ia.getHostAddress();
54  
55                      break;
56                  }
57              }
58  
59              if (results == null) {
60                  StringBuilder sb = new StringBuilder();
61  
62                  InetAddress[] ia = InetAddress.getAllByName(_domain);
63  
64                  for (int i = 0; i < ia.length; i++) {
65                      sb.append(ia[i].getHostName());
66  
67                      if (i + 1 <= ia.length) {
68                          sb.append(",");
69                      }
70                  }
71  
72                  results = sb.toString();
73              }
74  
75              dnsLookup = new DNSLookup(_domain, results);
76          }
77          catch (Exception e) {
78              throw new WebCacheException(_domain + " " + e.toString());
79          }
80  
81          return dnsLookup;
82      }
83  
84      public long getRefreshTime() {
85          return _REFRESH_TIME;
86      }
87  
88      private static final long _REFRESH_TIME = Time.DAY;
89  
90      private String _domain;
91  
92  }