| DNSLookupWebCacheItem.java |
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 }