| ServiceLocator.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.portal.util;
24
25 import com.liferay.portal.kernel.bean.ExceptionSafeBeanHandler;
26 import com.liferay.portal.kernel.util.MethodInvoker;
27 import com.liferay.portal.kernel.util.MethodWrapper;
28
29 import java.lang.reflect.Proxy;
30
31 import org.apache.commons.logging.Log;
32 import org.apache.commons.logging.LogFactory;
33
34 /**
35 * <a href="ServiceLocator.java.html"><b><i>View Source</i></b></a>
36 *
37 * @author Brian Wing Shun Chan
38 *
39 */
40 public class ServiceLocator {
41
42 public static ServiceLocator getInstance() {
43 return _instance;
44 }
45
46 public Object findService(String serviceName) {
47 Object obj = null;
48
49 try {
50 String factoryName = serviceName + _FACTORY_SUFFIX;
51
52 MethodWrapper methodWrapper = new MethodWrapper(
53 factoryName, _SERVICE_METHOD, new Object[0]);
54
55 obj = MethodInvoker.invoke(methodWrapper, false);
56 }
57 catch (Exception e) {
58 _log.error(e);
59 }
60
61 return obj;
62 }
63
64 public Object findExceptionSafeService(Class<?> serviceClass) {
65 Object obj = findService(serviceClass.getName());
66
67 if (obj != null) {
68 obj = Proxy.newProxyInstance(
69 serviceClass.getClassLoader(), new Class[] {serviceClass},
70 new ExceptionSafeBeanHandler(obj));
71 }
72
73 return obj;
74 }
75
76 private ServiceLocator() {
77 }
78
79 private static Log _log = LogFactory.getLog(ServiceLocator.class);
80
81 private static final String _FACTORY_SUFFIX = "Factory";
82
83 private static final String _SERVICE_METHOD = "getService";
84
85 private static ServiceLocator _instance = new ServiceLocator();
86
87 }