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Java > Open Source Codes > org > apache > ojb > broker > platforms > PlatformInformixImpl


1 package org.apache.ojb.broker.platforms;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 import java.sql.CallableStatement JavaDoc;
19 import java.sql.Connection JavaDoc;
20 import java.sql.SQLException JavaDoc;
21 import java.sql.Statement JavaDoc;
22 import java.sql.Types JavaDoc;
23
24 import org.apache.ojb.broker.metadata.JdbcConnectionDescriptor;
25
26 /**
27  * This class extends <code>PlatformDefaultImpl</code> and defines specific
28  * behavior for the Informix platform.
29  *
30  * @version 1.0
31  * @author Thomas Mahler
32  */
33 public class PlatformInformixImpl extends PlatformDefaultImpl
34 {
35
36     /** @see Platform#initializeJdbcConnection */
37     public void initializeJdbcConnection(JdbcConnectionDescriptor jcd, Connection JavaDoc conn) throws PlatformException
38     {
39         super.initializeJdbcConnection(jcd, conn);
40         Statement JavaDoc stmt = null;
41         try
42         {
43             stmt = conn.createStatement();
44             stmt.execute("SET LOCK MODE TO WAIT");
45         }
46         catch (SQLException JavaDoc e)
47         {
48             // ignore it
49 }
50         finally
51         {
52             if(stmt != null)
53             {
54                 try
55                 {
56                     stmt.close();
57                 }
58                 catch(SQLException JavaDoc e)
59                 {
60                     // ignore
61 }
62             }
63         }
64     }
65
66     /**
67      * @see org.apache.ojb.broker.platforms.PlatformDefaultImpl#prepareNextValProcedureStatement(java.sql.Connection,
68      * java.lang.String, java.lang.String)
69      */
70     public CallableStatement JavaDoc prepareNextValProcedureStatement(Connection JavaDoc con, String JavaDoc procedureName,
71                                                               String JavaDoc sequenceName) throws PlatformException
72     {
73         try
74         {
75             /*
76              * Following works for Informix Dynamik Server 9.4 and the Informix
77              * JDBC.3.00.JC1 driver. It is important to call the executeQuery()
78              * method here because the executeUpdate() method doesn't work
79              * correctly and returns an error if it is called alone.
80              */
81             String JavaDoc sp = "{? = call " + procedureName + "(?,?)}";
82             CallableStatement JavaDoc cs = con.prepareCall(sp);
83             cs.registerOutParameter(1, Types.BIGINT);
84             cs.setString(2, sequenceName);
85             cs.executeQuery();
86             return cs;
87         }
88         catch(SQLException JavaDoc e)
89         {
90             throw new PlatformException(e);
91         }
92     }
93 }
94
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