SmartDataSource


1   /*
2    * Copyright 2002-2007 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.jdbc.datasource;
18  
19  import java.sql.Connection  ;
20  
21  import javax.sql.DataSource  ;
22  
23  /**
24   * Extension of the <code>javax.sql.DataSource</code> interface, to be
25   * implemented by special DataSources that return JDBC Connections
26   * in an unwrapped fashion.
27   *
28   * <p>Classes using this interface can query whether or not the Connection
29   * should be closed after an operation. Spring's DataSourceUtils and
30   * JdbcTemplate classes automatically perform such a check.
31   *
32   * @author Rod Johnson
33   * @author Juergen Hoeller
34   * @see SingleConnectionDataSource#shouldClose
35   * @see DataSourceUtils#releaseConnection
36   * @see org.springframework.jdbc.core.JdbcTemplate
37   */
38  public interface SmartDataSource extends DataSource   {
39          
40      /** 
41       * Should we close this Connection, obtained from this DataSource?
42       * <p>Code that uses Connections from a SmartDataSource should always
43       * perform a check via this method before invoking <code>close()</code>.
44       * <p>Note that the JdbcTemplate class in the 'jdbc.core' package takes care of
45       * releasing JDBC Connections, freeing application code of this responsibility.
46       * @param con the Connection to check
47       * @return whether the given Connection should be closed
48       * @see java.sql.Connection#close()
49       */
50      boolean shouldClose(Connection   con);
51  
52  }
53
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