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Java > Open Source Codes > org > springframework > orm > hibernate3 > SpringSessionContext


1 /*
2  * Copyright 2002-2006 the original author or authors.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
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
17 package org.springframework.orm.hibernate3;
18
19 import org.hibernate.HibernateException;
20 import org.hibernate.classic.Session;
21 import org.hibernate.context.CurrentSessionContext;
22 import org.hibernate.engine.SessionFactoryImplementor;
23
24 /**
25  * Implementation of Hibernate 3.1's CurrentSessionContext interface
26  * that delegates to Spring's SessionFactoryUtils for providing a
27  * Spring-managed current Session.
28  *
29  * <p>Used by Spring's LocalSessionFactoryBean if told to not expose a
30  * transaction-aware SessionFactory proxy. LocalSessionFactoryBean's default
31  * is still SessionFactory proxying, though, mainly to remain compatible with
32  * Hibernate 3.0 as well. Turn the "exposeTransactionAwareSessionFactory" flag
33  * to "false" to expose the raw Hibernate 3.1 CurrentSessionContext mechanism.
34  *
35  * <p>This CurrentSessionContext implementation can be specified in custom
36  * SessionFactory setup through the "hibernate.current_session_context_class"
37  * property, with the fully qualified name of this class as value.
38  *
39  * @author Juergen Hoeller
40  * @since 2.0
41  * @see SessionFactoryUtils#doGetSession
42  * @see LocalSessionFactoryBean#setExposeTransactionAwareSessionFactory
43  */
44 public class SpringSessionContext implements CurrentSessionContext {
45
46     private final SessionFactoryImplementor sessionFactory;
47
48
49     /**
50      * Create a new SpringSessionContext for the given Hibernate SessionFactory.
51      * @param sessionFactory the SessionFactory to provide current Sessions for
52      */
53     public SpringSessionContext(SessionFactoryImplementor sessionFactory) {
54         this.sessionFactory = sessionFactory;
55     }
56
57     /**
58      * Retrieve the Spring-managed Session for the current thread, if any.
59      */
60     public Session currentSession() throws HibernateException {
61         try {
62             return (org.hibernate.classic.Session) SessionFactoryUtils.doGetSession(this.sessionFactory, false);
63         }
64         catch (IllegalStateException JavaDoc ex) {
65             throw new HibernateException(ex.getMessage());
66         }
67     }
68
69 }
70
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