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1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ejb.plugins.cmp.jdbc.keygen;
23
24 import java.sql.PreparedStatement;
25 import java.sql.SQLException;
26 import java.sql.ResultSet;
27 import java.sql.Statement;
28 import java.lang.reflect.Method;
29 import java.lang.reflect.InvocationTargetException;
30
31 import javax.ejb.EJBException;
32
33 import org.jboss.ejb.plugins.cmp.jdbc.JDBCIdentityColumnCreateCommand;
34 import org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager;
35 import org.jboss.ejb.plugins.cmp.jdbc.JDBCUtil;
36 import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityCommandMetaData;
37 import org.jboss.ejb.EntityEnterpriseContext;
38 import org.jboss.deployment.DeploymentException;
39 import org.jboss.logging.Logger;
40
41 /**
42 * Create command for MySQL that uses the driver's getGeneratedKeys method
43 * to retrieve AUTO_INCREMENT values.
44 *
45 * @author <a href="mailto:jeremy@boynes.com">Jeremy Boynes</a>
46 * @author Scott.Stark@jboss.org
47 * @version $Revision: 37459 $
48 */
49 public class JDBCMySQLCreateCommand extends JDBCIdentityColumnCreateCommand
50 {
51 private static final Logger log = Logger.getLogger(JDBCMySQLCreateCommand.class);
52 private String className;
53 private String methodName;
54 private Method method;
55 private Method getUnderlyingStatement;
56
57 public void init(JDBCStoreManager manager) throws DeploymentException
58 {
59 super.init(manager);
60 ClassLoader loader = GetTCLAction.getContextClassLoader();
61 try
62 {
63 Class psClass = loader.loadClass(className);
64 method = psClass.getMethod(methodName, null);
65 }
66 catch (ClassNotFoundException e)
67 {
68 throw new DeploymentException("Could not load driver class: " + className, e);
69 }
70 catch (NoSuchMethodException e)
71 {
72 throw new DeploymentException("Driver does not have method: " + methodName + "()");
73 }
74
75 try
76 {
77 Class wrapperClass = loader.loadClass("org.jboss.resource.adapter.jdbc.StatementAccess");
78 getUnderlyingStatement = wrapperClass.getMethod("getUnderlyingStatement", null);
79 }
80 catch (ClassNotFoundException e)
81 {
82 throw new DeploymentException("Could not load org.jboss.resource.adapter.jdbc.StatementAccess", e);
83 }
84 catch (NoSuchMethodException e)
85 {
86 throw new DeploymentException("StatementAccess.getUnderlyingStatement not found", e);
87 }
88 }
89
90 protected void initEntityCommand(JDBCEntityCommandMetaData entityCommand) throws DeploymentException
91 {
92 super.initEntityCommand(entityCommand);
93 className = entityCommand.getAttribute("class-name");
94 if (className == null)
95 {
96 className = "com.mysql.jdbc.PreparedStatement";
97 }
98 methodName = entityCommand.getAttribute("method");
99 if (methodName == null)
100 {
101 methodName = "getGeneratedKeys";
102 }
103 }
104
105 protected int executeInsert(int paramIndex, PreparedStatement ps, EntityEnterpriseContext ctx) throws SQLException
106 {
107 int rows = ps.executeUpdate();
108
109 // remove any JCA wrappers
110 Statement stmt = ps;
111 do
112 {
113 try
114 {
115 Object[] args = {};
116 stmt = (Statement) getUnderlyingStatement.invoke(stmt, args);
117 }
118 catch (IllegalAccessException e)
119 {
120 SQLException ex = new SQLException("Failed to invoke getUnderlyingStatement");
121 ex.initCause(e);
122 throw ex;
123 }
124 catch (InvocationTargetException e)
125 {
126 SQLException ex = new SQLException("Failed to invoke getUnderlyingStatement");
127 ex.initCause(e);
128 throw ex;
129 }
130 } while (stmt != null && method.getDeclaringClass().isInstance(stmt) == false);
131
132 ResultSet rs = null;
133 try
134 {
135 rs = (ResultSet) method.invoke(stmt, null);
136 if (!rs.next())
137 {
138 throw new EJBException("getGeneratedKeys returned an empty ResultSet");
139 }
140 pkField.loadInstanceResults(rs, 1, ctx);
141 }
142 catch (RuntimeException e)
143 {
144 throw e;
145 }
146 catch (Exception e)
147 {
148 // throw EJBException to force a rollback as the row has been inserted
149 throw new EJBException("Error extracting generated keys", e);
150 }
151 finally
152 {
153 JDBCUtil.safeClose(rs);
154 }
155 return rows;
156 }
157 }