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Java > Open Source Codes > org > jboss > ejb3 > entity > TransactionScopedEntityManagerInterceptor


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.ejb3.entity;
23
24 import org.jboss.aop.advice.Interceptor;
25 import org.jboss.aop.joinpoint.Invocation;
26 import org.jboss.logging.Logger;
27
28 import javax.persistence.EntityManager;
29 import java.util.IdentityHashMap JavaDoc;
30 import java.util.Map JavaDoc;
31
32 /**
33  * If a transaction-scoped entitymanager is accessed outside of a transaction
34  * an entitymanager is created for the duration of the current EJB method call
35  * this entitymanager must be closed at the end of the method invocation.
36  *
37  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
38  * @version $Revision: 42317 $
39  */
40 public class TransactionScopedEntityManagerInterceptor implements Interceptor
41 {
42    private static final Logger log = Logger.getLogger(TransactionScopedEntityManagerInterceptor.class);
43
44    public String JavaDoc getName()
45    {
46       return this.getClass().getName();
47    }
48
49    public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
50    {
51       try
52       {
53          ManagedEntityManagerFactory.nonTxStack.push(new IdentityHashMap JavaDoc());
54          return invocation.invokeNext();
55       }
56       finally
57       {
58          Map JavaDoc map = ManagedEntityManagerFactory.nonTxStack.pop();
59          for (Object JavaDoc obj : map.values())
60          {
61             try
62             {
63                ((EntityManager)obj).close();
64                log.debug("********************* CLOSING tx scoped nontx entity manager");
65             }
66             catch (Exception JavaDoc ignored)
67             {
68             }
69          }
70       }
71    }
72 }
73
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