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Java > Open Source Codes > org > jboss > aspects > txlock > TxLockInterceptor


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.aspects.txlock;
23
24 import org.jboss.aop.joinpoint.Invocation;
25 import org.jboss.logging.Logger;
26
27 import javax.transaction.Transaction JavaDoc;
28 import javax.transaction.TransactionManager JavaDoc;
29
30 /**
31  * This interceptor handles chooses an object to invoke
32  * on based on the transaction
33  *
34  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
35  * @version $Revision: 37406 $
36  */
37 public class TxLockInterceptor implements org.jboss.aop.advice.Interceptor
38 {
39    /**
40     * Logging instance
41     */
42    protected Logger log = Logger.getLogger(this.getClass());
43
44    private final TransactionManager JavaDoc tm;
45    private final QueuedTxLock lock;
46
47    public TxLockInterceptor(TransactionManager JavaDoc tm, QueuedTxLock lock)
48    {
49       this.tm = tm;
50       this.lock = lock;
51    }
52
53    public String JavaDoc getName()
54    {
55       return "TxLockInterceptor";
56    }
57
58    /**
59     *
60     */
61    public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
62    {
63       Transaction JavaDoc tx = tm.getTransaction();
64       if (tx == null) return invocation.invokeNext();
65
66       else
67       {
68       }
69
70
71       lock.schedule(tx, invocation);
72       try
73       {
74          return invocation.invokeNext();
75       }
76       finally
77       {
78          lock.endInvocation(tx);
79       }
80    }
81
82
83 }
84
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