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1   /*
2    * Copyright (c) 2007, James Leigh All rights reserved.
3    * 
4    * Redistribution and use in source and binary forms, with or without
5    * modification, are permitted provided that the following conditions are met:
6    * 
7    * - Redistributions of source code must retain the above copyright notice, this
8    *   list of conditions and the following disclaimer.
9    * - Redistributions in binary form must reproduce the above copyright notice,
10   *   this list of conditions and the following disclaimer in the documentation
11   *   and/or other materials provided with the distribution. 
12   * - Neither the name of the openrdf.org nor the names of its contributors may
13   *   be used to endorse or promote products derived from this software without
14   *   specific prior written permission.
15   * 
16   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26   * POSSIBILITY OF SUCH DAMAGE.
27   * 
28   */
29  package org.openrdf.elmo.sesame;
30  
31  import javax.persistence.EntityTransaction;
32  import javax.persistence.PersistenceException;
33  import javax.persistence.RollbackException;
34  
35  import org.openrdf.repository.RepositoryConnection;
36  import org.openrdf.repository.RepositoryException;
37  
38  /**
39   * JPA EntityTransaction interface for SesameBeanManager.
40   * 
41   * @author James Leigh
42   * 
43   */
44  public class SesameTransaction implements EntityTransaction {
45  
46  	private RepositoryConnection conn;
47  
48  	private boolean rollbackOnly = false;
49  
50  	public SesameTransaction(RepositoryConnection conn) {
51  		this.conn = conn;
52  	}
53  
54  	public void begin() {
55  		try {
56  			if (isActive())
57  				throw new IllegalStateException("Transaction already started");
58  			conn.setAutoCommit(false);
59  		} catch (RepositoryException e) {
60  			throw new PersistenceException(e);
61  		}
62  	}
63  
64  	public void commit() {
65  		try {
66  			if (!isActive())
67  				throw new IllegalStateException("Transaction has not been started");
68  			conn.commit();
69  			conn.setAutoCommit(true);
70  			rollbackOnly = false;
71  		} catch (RepositoryException e) {
72  			throw new RollbackException(e);
73  		}
74  	}
75  
76  	public void rollback() {
77  		try {
78  			if (!isActive())
79  				throw new IllegalStateException("Transaction has not been started");
80  			conn.rollback();
81  			conn.setAutoCommit(true);
82  			rollbackOnly = false;
83  		} catch (RepositoryException e) {
84  			throw new PersistenceException(e);
85  		}
86  	}
87  
88  	public void setRollbackOnly() {
89  		if (!isActive())
90  			throw new IllegalStateException("Transaction has not been started");
91  		rollbackOnly = true;
92  	}
93  
94  	public boolean getRollbackOnly() {
95  		if (!isActive())
96  			throw new IllegalStateException("Transaction has not been started");
97  		return rollbackOnly;
98  	}
99  
100 	public boolean isActive() {
101 		try {
102 			return !conn.isAutoCommit();
103 		} catch (RepositoryException e) {
104 			throw new PersistenceException(e);
105 		}
106 	}
107 
108 }