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 2005 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: PropertyStore.java,v 1.2 2005/10/20 14:07:03 tanderson Exp $
44 */
45 package org.exolab.jms.tools.migration.proxy;
46
47 import java.sql.Connection;
48 import java.sql.PreparedStatement;
49 import java.sql.SQLException;
50 import java.sql.ResultSet;
51 import java.util.HashMap;
52 import java.util.Map;
53
54 import org.exolab.jms.persistence.PersistenceException;
55 import org.exolab.jms.persistence.SQLHelper;
56
57
58 /***
59 * Stores migration version information.
60 *
61 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
62 * @version $Revision: 1.2 $ $Date: 2005/10/20 14:07:03 $
63 */
64 public class PropertyStore implements DBConstants {
65
66 /***
67 * The properties.
68 */
69 private final Map _properties = new HashMap();
70
71 /***
72 * The database connection.
73 */
74 private final Connection _connection;
75
76 /***
77 * Construct a new <code>PropertyStore</code>.
78 *
79 * @param connection the database connection
80 * @throws PersistenceException for any persistence error
81 */
82 public PropertyStore(Connection connection) throws PersistenceException {
83 _connection = connection;
84 init();
85 }
86
87 /***
88 * Add a property.
89 *
90 * @param name the property name
91 * @param value the property value
92 * @throws PersistenceException for any persistence error
93 */
94 public void add(String name, String value) throws PersistenceException {
95 PreparedStatement insert = null;
96 try {
97 insert = _connection.prepareStatement(
98 "insert into " + PROPERTIES_TABLE + " values (?, ?)");
99 insert.setString(1, name);
100 insert.setString(2, value);
101 insert.execute();
102
103 _properties.put(name, value);
104 } catch (SQLException exception) {
105 throw new PersistenceException(
106 "Failed to insert property, name=" + name
107 + ", value=" + value, exception);
108 } finally {
109 SQLHelper.close(insert);
110 }
111 }
112
113 /***
114 * Returns the value of a property.
115 *
116 * @param name the property name
117 * @return the value of the property, or <code>null</code> if it doesn't
118 * exist
119 */
120 public String get(String name) {
121 return (String) _properties.get(name);
122 }
123
124 /***
125 * Loads the properties from the database.
126 *
127 * @throws PersistenceException for any error
128 */
129 private void init() throws PersistenceException {
130 PreparedStatement select = null;
131 ResultSet set = null;
132 try {
133 select = _connection.prepareStatement(
134 "select name, value from " + PROPERTIES_TABLE);
135 set = select.executeQuery();
136 while (set.next()) {
137 String name = set.getString(1);
138 String value = set.getString(2);
139 _properties.put(name, value);
140 }
141 } catch (SQLException exception) {
142 throw new PersistenceException("Failed to load properties",
143 exception);
144 } finally {
145 SQLHelper.close(set);
146 SQLHelper.close(select);
147 }
148 }
149 }