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1   package org.apache.torque.dsfactory;
2   
3   /*
4    * Copyright 2001-2004 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,v 1.1.2.2 2004/05/20 04:35:14 seade Exp $
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 DataSource 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          if (configuration == null)
65          {
66              throw new TorqueException(
67                  "Torque cannot be initialized without a valid configuration. "
68                  + "Please check the log files for further details.");
69          }
70  
71          ConnectionPoolDataSource cpds = initCPDS(configuration);
72          PerUserPoolDataSource ds = initJdbc2Pool(configuration);
73          ds.setConnectionPoolDataSource(cpds);
74          this.ds = ds;
75      }
76  
77      /***
78       * Initializes the Jdbc2PoolDataSource.
79       *
80       * @param configuration where to read the settings from
81       * @throws TorqueException if a property set fails
82       * @return a configured <code>Jdbc2PoolDataSource</code>
83       */
84      private PerUserPoolDataSource initJdbc2Pool(Configuration configuration)
85          throws TorqueException
86      {
87          log.debug("Starting initJdbc2Pool");
88          PerUserPoolDataSource ds = new PerUserPoolDataSource();
89          Configuration c = Torque.getConfiguration();
90  
91          if (c == null)
92          {
93              log.warn("Global Configuration not set,"
94                      + " no Default pool data source configured!");
95          }
96          else
97          {
98              Configuration conf = c.subset(DEFAULT_POOL_KEY);
99              applyConfiguration(conf, ds);
100         }
101 
102         Configuration conf = configuration.subset(POOL_KEY);
103         applyConfiguration(conf, ds);
104         return ds;
105     }
106 }