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1   package org.apache.torque.dsfactory;
2   
3   /*
4    * Copyright 2001-2005 The Apache Software Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License")
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  import javax.sql.ConnectionPoolDataSource;
20  import javax.sql.DataSource;
21  
22  import org.apache.commons.configuration.Configuration;
23  
24  import org.apache.commons.dbcp.datasources.PerUserPoolDataSource;
25  
26  import org.apache.commons.logging.Log;
27  import org.apache.commons.logging.LogFactory;
28  
29  import org.apache.torque.Torque;
30  import org.apache.torque.TorqueException;
31  
32  /***
33   * A factory that looks up the DataSource using the JDBC2 pool methods.
34   *
35   * @author <a href="mailto:jmcnally@apache.org">John McNally</a>
36   * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
37   * @version $Id: PerUserPoolDataSourceFactory.java 239636 2005-08-24 12:38:09Z henning $
38   */
39  public class PerUserPoolDataSourceFactory
40      extends AbstractDataSourceFactory
41      implements DataSourceFactory
42  {
43  
44      /*** The log. */
45      private static Log log
46              = LogFactory.getLog(PerUserPoolDataSourceFactory.class);
47  
48      /*** The wrapped <code>DataSource</code>. */
49      private PerUserPoolDataSource ds;
50  
51      /***
52       * @see org.apache.torque.dsfactory.DataSourceFactory#getDataSource
53       */
54      public DataSource getDataSource()
55      {
56          return ds;
57      }
58  
59      /***
60       * @see org.apache.torque.dsfactory.DataSourceFactory#initialize
61       */
62      public void initialize(Configuration configuration) throws TorqueException
63      {
64          super.initialize(configuration);
65  
66          ConnectionPoolDataSource cpds = initCPDS(configuration);
67          PerUserPoolDataSource ds = initJdbc2Pool(configuration);
68          ds.setConnectionPoolDataSource(cpds);
69          this.ds = ds;
70      }
71  
72      /***
73       * Initializes the Jdbc2PoolDataSource.
74       *
75       * @param configuration where to read the settings from
76       * @throws TorqueException if a property set fails
77       * @return a configured <code>Jdbc2PoolDataSource</code>
78       */
79      private PerUserPoolDataSource initJdbc2Pool(Configuration configuration)
80          throws TorqueException
81      {
82          log.debug("Starting initJdbc2Pool");
83          PerUserPoolDataSource ds = new PerUserPoolDataSource();
84          Configuration c = Torque.getConfiguration();
85  
86          if (c == null || c.isEmpty())
87          {
88              log.warn("Global Configuration not set,"
89                      + " no Default pool data source configured!");
90          }
91          else
92          {
93              Configuration conf = c.subset(DEFAULT_POOL_KEY);
94              applyConfiguration(conf, ds);
95          }
96  
97          Configuration conf = configuration.subset(POOL_KEY);
98          applyConfiguration(conf, ds);
99          return ds;
100     }
101 
102     /***
103      * Closes the pool associated with this factory and releases it.
104      * @throws TorqueException if the pool cannot be closed properly
105      */
106     public void close() throws TorqueException
107     {
108         try
109         {
110             ds.close();
111         }
112         catch (Exception e)
113         {
114             log.error("Exception caught during close()", e);
115             throw new TorqueException(e);
116         }
117         ds = null;
118     }
119 
120 }