KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > openejb > resource > jdbc > JdbcLocalTransaction


1 /**
2  * Redistribution and use of this software and associated documentation
3  * ("Software"), with or without modification, are permitted provided
4  * that the following conditions are met:
5  *
6  * 1. Redistributions of source code must retain copyright
7  * statements and notices. Redistributions must also contain a
8  * copy of this document.
9  *
10  * 2. Redistributions in binary form must reproduce the
11  * above copyright notice, this list of conditions and the
12  * following disclaimer in the documentation and/or other
13  * materials provided with the distribution.
14  *
15  * 3. The name "Exolab" must not be used to endorse or promote
16  * products derived from this Software without prior written
17  * permission of Exoffice Technologies. For written permission,
18  * please contact info@exolab.org.
19  *
20  * 4. Products derived from this Software may not be called "Exolab"
21  * nor may "Exolab" appear in their names without prior written
22  * permission of Exoffice Technologies. Exolab is a registered
23  * trademark of Exoffice Technologies.
24  *
25  * 5. Due credit should be given to the Exolab Project
26  * (http://www.exolab.org/).
27  *
28  * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29  * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32  * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39  * OF THE POSSIBILITY OF SUCH DAMAGE.
40  *
41  * Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
42  *
43  * $Id: JdbcLocalTransaction.java 1447 2004-10-25 12:34:45Z pmlopes $
44  */

45 package org.openejb.resource.jdbc;
46
47 import javax.resource.spi.LocalTransaction JavaDoc;
48
49 import org.openejb.util.Logger;
50 import org.openejb.util.Messages;
51
52 public class JdbcLocalTransaction implements LocalTransaction JavaDoc {
53
54     protected java.sql.Connection JavaDoc sqlConn;
55     protected JdbcManagedConnection managedConn;
56     protected boolean isActiveTransaction = false;
57
58     protected static final Messages messages = new Messages( "org.openejb.util.resources" );
59     protected static final Logger logger = Logger.getInstance( "OpenEJB.resource.jdbc", "org.openejb.util.resources" );
60
61     public JdbcLocalTransaction(JdbcManagedConnection managedConn) {
62         this.sqlConn = managedConn.getSQLConnection();
63         this.managedConn = managedConn;
64     }
65
66
67     public void begin() throws javax.resource.ResourceException JavaDoc{
68         if(isActiveTransaction){
69             throw new javax.resource.spi.LocalTransactionException JavaDoc("Invalid transaction context. Transaction already active");
70         }
71         try{
72         sqlConn.setAutoCommit(false);
73         isActiveTransaction = true;
74         }catch(java.sql.SQLException JavaDoc sqlE){
75             isActiveTransaction = false;
76             throw new javax.resource.spi.ResourceAdapterInternalException JavaDoc("Can not begin transaction demarcation. Setting auto-commit to false for transaction chaining failed");
77         }
78         managedConn.localTransactionStarted();
79     }
80
81     public void commit() throws javax.resource.ResourceException JavaDoc{
82         if(isActiveTransaction){
83             isActiveTransaction = false;
84             try{
85             sqlConn.commit();
86             }catch(java.sql.SQLException JavaDoc sqlE){
87                 String JavaDoc msg = messages.format( "jdbc.commit.failed", formatSqlException( sqlE ));
88                 logger.error( msg );
89                 throw new javax.resource.spi.LocalTransactionException JavaDoc( msg );
90             }
91             managedConn.localTransactionCommitted();
92             try{
93             sqlConn.setAutoCommit(true);
94             }catch(java.sql.SQLException JavaDoc sqlE){
95                 throw new javax.resource.spi.ResourceAdapterInternalException JavaDoc("Setting auto-commit to true to end transaction chaining failed");
96             }
97         }else{
98             throw new javax.resource.spi.LocalTransactionException JavaDoc("Invalid transaction context. No active transaction");
99         }
100     }
101
102     public void rollback() throws javax.resource.ResourceException JavaDoc{
103         if(isActiveTransaction){
104             isActiveTransaction = false;
105
106             try{
107             sqlConn.rollback();
108             }catch(java.sql.SQLException JavaDoc sqlE){
109                 String JavaDoc msg = messages.format( "jdbc.rollback.failed", formatSqlException( sqlE ));
110                 logger.error( msg );
111                 throw new javax.resource.spi.LocalTransactionException JavaDoc( msg );
112             }
113
114             managedConn.localTransactionRolledback();
115
116             try{
117             sqlConn.setAutoCommit(true);
118             }catch(java.sql.SQLException JavaDoc sqlE){
119                 throw new javax.resource.spi.ResourceAdapterInternalException JavaDoc("Setting auto-commit to true to end transaction chaining failed");
120             }
121         }else{
122             throw new javax.resource.spi.LocalTransactionException JavaDoc("Invalid transaction context. No active transaction");
123         }
124     }
125
126     /**
127     * This method is called by the JdbcConnectionManager when its own cleanup method is called.
128     * It ensures that the JdbcLocalTransaction has been properly committed or rolled back. If the
129     * transaction is still active, it's rolled back.
130     */

131     protected void cleanup() throws javax.resource.ResourceException JavaDoc{
132         if(isActiveTransaction){
133             rollback();
134         }
135     }
136
137     protected String JavaDoc formatSqlException(java.sql.SQLException JavaDoc e){
138         return messages.format("jdbc.exception", e.getClass().getName(), e.getMessage(), e.getErrorCode()+"", e.getSQLState());
139     }
140 }
Popular Tags