01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * 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.tm;
23:
24: import javax.transaction.InvalidTransactionException;
25: import javax.transaction.SystemException;
26: import javax.transaction.Transaction;
27: import javax.transaction.TransactionManager;
28:
29: import org.jboss.util.NestedRuntimeException;
30:
31: /**
32: * A simple helper for transaction demarcation.
33: *
34: * @author <a href="adrian@jboss.com">Adrian Brock</a>
35: * @version $Revision: 57208 $
36: */
37: public class TransactionDemarcationSupport {
38: private static final TransactionManagerLocator locator = TransactionManagerLocator
39: .getInstance();
40:
41: /**
42: * Suspend any transaction associated with the thread
43: *
44: * @return any suspended transaction or null if there was no transaction
45: */
46: public static Transaction suspendAnyTransaction() {
47: TransactionManager tm = locator.locate();
48: try {
49: return tm.suspend();
50: } catch (SystemException e) {
51: throw new NestedRuntimeException(
52: "Unable to suspend transaction", e);
53: }
54: }
55:
56: /**
57: * Resume any transaction
58: *
59: * @param tx the transaction to resume
60: */
61: public static void resumeAnyTransaction(Transaction tx) {
62: // Nothing to do
63: if (tx == null)
64: return;
65:
66: TransactionManager tm = locator.locate();
67: try {
68: tm.resume(tx);
69: } catch (InvalidTransactionException e) {
70: throw new NestedRuntimeException(
71: "Unable to resume an invalid transaction", e);
72: } catch (SystemException e) {
73: throw new NestedRuntimeException(
74: "Unable to suspend transaction", e);
75: }
76: }
77: }
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