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Java > Open Source Codes > org > jboss > proxy > ejb > NoTxPropagationInterceptor


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.proxy.ejb;
23
24 import java.rmi.RemoteException JavaDoc;
25
26 import javax.transaction.Transaction JavaDoc;
27
28 import org.jboss.ejb.plugins.AbstractInterceptor;
29 import org.jboss.invocation.Invocation;
30 import org.jboss.metadata.MetaData;
31
32 /**
33  * A NoTxPropagationInterceptor for throwing remote exceptions
34  * according to the spec.
35  *
36  * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
37  * @version $Revision: 37459 $
38  */
39 public class NoTxPropagationInterceptor extends AbstractInterceptor
40 {
41    public Object JavaDoc invokeHome(Invocation mi) throws Exception JavaDoc
42    {
43       checkNoTxPropagation(mi);
44       return getNext().invokeHome(mi);
45    }
46
47    public Object JavaDoc invoke(Invocation mi) throws Exception JavaDoc
48    {
49       checkNoTxPropagation(mi);
50       return getNext().invoke(mi);
51    }
52    
53    protected void checkNoTxPropagation(Invocation mi) throws Exception JavaDoc
54    {
55       // No problem for local
56 if (mi.isLocal())
57          return;
58       
59       // Do we have a foreign transaction context?
60 Transaction JavaDoc tx = mi.getTransaction();
61       if (tx == null || (tx instanceof ForeignTransaction) == false)
62          return;
63       
64       byte txType = container.getBeanMetaData().getTransactionMethod(mi.getMethod(), mi.getType());
65       if (txType != MetaData.TX_NOT_SUPPORTED && txType != MetaData.TX_REQUIRES_NEW)
66          throw new RemoteException JavaDoc("TxPropagation is not supported: " + container.getJmxName() + " method=" + mi.getMethod());
67       
68       // The propogation is not a problem
69 mi.setTransaction(null);
70    }
71 }
72
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