CloseConnectionTag


1   /*
2    * Copyright 1999,2004 The Apache Software Foundation.
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.apache.taglibs.dbtags.connection;
18  
19  import java.sql.Connection  ;
20  import java.sql.SQLException  ;
21  
22  import javax.servlet.jsp.tagext.TagSupport  ;
23  
24  /**
25   * <p>JSP tag closeconnection, used to close the
26   * specified java.sql.Connection.<p>
27   * 
28   * <p>JSP Tag Lib Descriptor
29   * <pre>
30   * &lt;name>closeConnection&lt;/name>
31   * &lt;tagclass>org.apache.taglibs.dbtags.connection.CloseConnectionTag&lt;/tagclass>
32   * &lt;bodycontent>empty&lt;/bodycontent>
33   * &lt;info>Close the specified connection.  The "conn" attribute is the name of a
34   * connection object in the page context.&lt;/info>
35   *   &lt;attribute>
36   *     &lt;name>conn&lt;/name>
37   *     &lt;required>true&lt;/required>
38   *     &lt;rtexprvalue>false&lt;/rtexprvalue>
39   *   &lt;/attribute>
40   * </pre>
41   * 
42   * @author Morgan Delagrange
43   * @see ConnectionTag
44   */
45  public class CloseConnectionTag extends TagSupport   {
46    
47    private String   _connId = null;
48  
49    /**
50     * The "conn" attribute is the name of a
51     * page context object containing a
52     * java.sql.Connection.
53     * 
54     * @param connectionId
55     *               attribute name of the java.sql.Connection to close.
56     * @see ConnectionTag
57     */
58    public void setConn(String   connectionId) {
59      _connId = connectionId;
60    }
61    
62    public int doStartTag() {
63  
64      try {
65        Connection   conn = (Connection  )pageContext.getAttribute(_connId);
66        conn.close();
67        conn = null;
68      } catch (SQLException   e) {
69        // failing to close a connection is not fatal
70        e.printStackTrace();
71      }
72      
73      return EVAL_BODY_INCLUDE;
74    }
75  
76    public void release() {
77      _connId = null;
78    }
79      
80  }
81
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