| DNSLookupWebCacheItem.java |
1 /**
2 * Copyright (c) 2000-2008 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.StringMaker;
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 import com.liferay.util.Time;
30
31 import java.net.InetAddress;
32
33 /**
34 * <a href="DNSLookupWebCacheItem.java.html"><b><i>View Source</i></b></a>
35 *
36 * @author Brian Wing Shun Chan
37 *
38 */
39 public class DNSLookupWebCacheItem implements WebCacheItem {
40
41 public DNSLookupWebCacheItem(String domain) {
42 _domain = domain;
43 }
44
45 public Object convert(String key) throws WebCacheException {
46 DNSLookup dnsLookup = null;
47
48 try {
49 String results = null;
50
51 char[] array = _domain.trim().toCharArray();
52
53 for (int i = 0; i < array.length; i++) {
54 if ((array[i] != '.') && !Character.isDigit(array[i])) {
55 InetAddress ia = InetAddress.getByName(_domain);
56
57 results = ia.getHostAddress();
58
59 break;
60 }
61 }
62
63 if (results == null) {
64 StringMaker sm = new StringMaker();
65
66 InetAddress[] ia = InetAddress.getAllByName(_domain);
67
68 for (int i = 0; i < ia.length; i++) {
69 sm.append(ia[i].getHostName());
70
71 if (i + 1 <= ia.length) {
72 sm.append(",");
73 }
74 }
75
76 results = sm.toString();
77 }
78
79 dnsLookup = new DNSLookup(_domain, results);
80 }
81 catch (Exception e) {
82 throw new WebCacheException(_domain + " " + e.toString());
83 }
84
85 return dnsLookup;
86 }
87
88 public long getRefreshTime() {
89 return _REFRESH_TIME;
90 }
91
92 private static final long _REFRESH_TIME = Time.DAY;
93
94 private String _domain;
95
96 }