Source Code Cross Referenced for SpringConnectionFactoryManagedImpl.java in  » ERP-CRM-Financial » Kuali-Financial-System » org » kuali » rice » database » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » ERP CRM Financial » Kuali Financial System » org.kuali.rice.database 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * Copyright 2007 The Kuali Foundation
03:         *
04:         * Licensed under the Educational Community License, Version 1.0 (the "License");
05:         * you may not use this file except in compliance with the License.
06:         * You may obtain a copy of the License at
07:         *
08:         * http://www.opensource.org/licenses/ecl1.php
09:         *
10:         * Unless required by applicable law or agreed to in writing, software
11:         * distributed under the License is distributed on an "AS IS" BASIS,
12:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13:         * See the License for the specific language governing permissions and
14:         * limitations under the License.
15:         */
16:        package org.kuali.rice.database;
17:
18:        import java.sql.Connection;
19:
20:        import org.apache.ojb.broker.accesslayer.LookupException;
21:        import org.apache.ojb.broker.metadata.JdbcConnectionDescriptor;
22:        import org.apache.ojb.broker.util.pooling.ByPassConnection;
23:        import org.springmodules.orm.ojb.support.LocalDataSourceConnectionFactory;
24:
25:        /**
26:         * <p>A subclass of the standard Spring LocalDataSourceConnectionFactory (that supplies
27:         * OJB with connections to datasource defined in Spring) that wraps the connection in a
28:         * ByPassConnection so that the JTA defined in the managed environment can control the
29:         * transaction.</p>
30:         * <p>This class works in concert with the following parameter in the corresponding OJB properties
31:         * config:</p>
32:         * <blockquote>
33:         *   <code>
34:         *     ConnectionFactoryClass=org.kuali.rice.database.SpringConnectionFactoryManagedImpl
35:         *   </code>
36:         * </blockquote>
37:         * Apparently this strategy is not required in OJB 1.0.4:
38:         * http://db.apache.org/ojb/release-notes.txt
39:         * <blockquote>
40:         *   "ConnectionFactoryManagedImpl is declared deprecated. Now OJB automatic detect the
41:         *   running JTA-transaction and suppress critical method calls on the used connection"
42:         * </blockquote>
43:         * <br/>
44:         * Details:
45:         * <blockquote>This is to overcome a shortcoming in Spring/OJB that in 1.03 you can't
46:         * run in a managed environment with Spring and OJB if Spring is giving OJB its Connections
47:         * through it's LocalDataSourceConnectionFactory (which doesn't wrap the connection in a bypass
48:         * connection).  This is suppressing commits - so that JTA can do it.
49:         * If one uses JNDI to grab the DS this wouldn't be necessary because both
50:         * Spring and OJB would grab the DS from there and we'd be cool.
51:         * The ByPassConnection is a class that comes with OJB which essentially turns calls
52:         * to commit, rollback, etc. into NO-OPS.  The reason it does this is because, in a
53:         * managed environment these methods are invoked on the individual connections by
54:         * the transaction manager and if you call the explicitly from the code they will
55:         * typically throw an exception (depending on the JTA implementation).
56:         * </blockquote>
57:         * (what about TransactionAwareDataSourceConnectionFactory mentioned in Spring docs?)
58:         */
59:        public class SpringConnectionFactoryManagedImpl extends
60:                LocalDataSourceConnectionFactory {
61:
62:            public Connection lookupConnection(JdbcConnectionDescriptor jcd)
63:                    throws LookupException {
64:                return new ByPassConnection(super .lookupConnection(jcd));
65:            }
66:
67:            protected Connection newConnectionFromDriverManager(
68:                    JdbcConnectionDescriptor arg0) throws LookupException {
69:                throw new UnsupportedOperationException(
70:                        "Not supported in managed environment");
71:            }
72:        }
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