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  }