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1   package org.apache.turbine.services.naming;
2   
3   
4   /*
5    * Licensed to the Apache Software Foundation (ASF) under one
6    * or more contributor license agreements.  See the NOTICE file
7    * distributed with this work for additional information
8    * regarding copyright ownership.  The ASF licenses this file
9    * to you under the Apache License, Version 2.0 (the
10   * "License"); you may not use this file except in compliance
11   * with the License.  You may obtain a copy of the License at
12   *
13   *   http://www.apache.org/licenses/LICENSE-2.0
14   *
15   * Unless required by applicable law or agreed to in writing,
16   * software distributed under the License is distributed on an
17   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18   * KIND, either express or implied.  See the License for the
19   * specific language governing permissions and limitations
20   * under the License.
21   */
22  
23  
24  import java.util.HashMap;
25  import java.util.Iterator;
26  import java.util.Map;
27  import java.util.Properties;
28  
29  import javax.naming.Context;
30  import javax.naming.InitialContext;
31  import javax.naming.NamingException;
32  
33  import org.apache.commons.configuration.Configuration;
34  import org.apache.commons.logging.Log;
35  import org.apache.commons.logging.LogFactory;
36  import org.apache.turbine.Turbine;
37  import org.apache.turbine.services.InitializationException;
38  import org.apache.turbine.services.TurbineBaseService;
39  
40  /**
41   * This class is the default implementation of NamingService, which
42   * provides JNDI naming contexts.
43   *
44   * @author <a href="mailto:greg@shwoop.com">Greg Ritter</a>
45   * @author <a href="mailto:colin.chalmers@maxware.nl">Colin Chalmers</a>
46   * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
47   * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
48   * @version $Id: TurbineNamingService.java 1078552 2011-03-06 19:58:46Z tv $
49   */
50  public class TurbineNamingService
51          extends TurbineBaseService
52          implements NamingService
53  {
54      /** Logging */
55      private static Log log = LogFactory.getLog(TurbineNamingService.class);
56  
57      /**
58       * A global Map of Property objects which are initialised using
59       * parameters from the ResourcesFile
60       */
61      private static Map<String, Properties> contextPropsList = null;
62  
63      /** All initial contexts known to this service */
64      private final Map<String, InitialContext> initialContexts = new HashMap<String, InitialContext>();
65  
66      /**
67       * Called the first time the Service is used.<br>
68       *
69       */
70      @Override
71      public void init()
72              throws InitializationException
73      {
74          // Context properties are specified in lines in the properties
75          // file that begin with "context.contextname.", allowing
76          // multiple named contexts to be used.  Everything after the
77          // "contextname."  is the name of the property that will be
78          // used by the InitialContext class to create a new context
79          // instance.
80  
81          Configuration conf = Turbine.getConfiguration();
82          try
83          {
84              contextPropsList = new HashMap<String, Properties>();
85  
86              for (Iterator contextKeys = conf.subset("context").getKeys();
87                   contextKeys.hasNext();)
88              {
89                  String key = (String) contextKeys.next();
90                  int end = key.indexOf(".");
91  
92                  if (end == -1)
93                  {
94                      continue;
95                  }
96  
97                  String contextName = key.substring(0, end);
98                  Properties contextProps = null;
99  
100                 if (contextPropsList.containsKey(contextName))
101                 {
102                     contextProps = contextPropsList.get(contextName);
103                 }
104                 else
105                 {
106                     contextProps = new Properties();
107                 }
108 
109                 contextProps.put(key.substring(end + 1),
110                         conf.getString(key));
111 
112                 contextPropsList.put(contextName, contextProps);
113             }
114 
115             for (Iterator contextPropsKeys = contextPropsList.keySet().iterator();
116                  contextPropsKeys.hasNext();)
117             {
118                 String key = (String) contextPropsKeys.next();
119                 Properties contextProps = contextPropsList.get(key);
120                 InitialContext context = new InitialContext(contextProps);
121                 initialContexts.put(key, context);
122             }
123 
124             setInit(true);
125         }
126         catch (NamingException e)
127         {
128             log.error("Failed to initialize JDNI contexts!", e);
129 
130             throw new InitializationException(
131                     "Failed to initialize JDNI contexts!");
132         }
133     }
134 
135 
136     /**
137      * Return the Context with the specified name.  The Context is
138      * constructed using the properties for the context with the
139      * specified name; ie. those properties that start with
140      * "services.servicename.properties.name.".
141      *
142      * @param contextName The name of the context.
143      * @return The context with the specified name, or null if no
144      * context exists with that name.
145      */
146     public Context getContext(String contextName)
147     {
148         // Get just the properties for the context with the specified
149         // name.
150         Properties contextProps = null;
151 
152         if (contextPropsList.containsKey(contextName))
153         {
154             contextProps = contextPropsList.get(contextName);
155         }
156         else
157         {
158             contextProps = new Properties();
159         }
160 
161         // Construct a new context with the properties.
162         try
163         {
164             return new InitialContext(contextProps);
165         }
166         catch (Exception e)
167         {
168             return null;
169         }
170     }
171 }