01: /**
02: * EasyBeans
03: * Copyright (C) 2006 Bull S.A.S.
04: * Contact: easybeans@ow2.org
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2.1 of the License, or any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19: * USA
20: *
21: * --------------------------------------------------------------------------
22: * $Id: JTransactionManager.java 1970 2007-10-16 11:49:25Z benoitf $
23: * --------------------------------------------------------------------------
24: */package org.ow2.easybeans.transaction;
25:
26: import javax.naming.InitialContext;
27: import javax.naming.NamingException;
28: import javax.transaction.TransactionManager;
29:
30: import org.ow2.easybeans.component.itf.TMComponent;
31:
32: /**
33: * Allows to get a transaction manager.
34: * @author Florent Benoit
35: */
36: public final class JTransactionManager {
37:
38: /**
39: * Utility class, no public constructor.
40: */
41: private JTransactionManager() {
42:
43: }
44:
45: /**
46: * Internal tm.
47: */
48: private static TransactionManager tm = null;
49:
50: /**
51: * Allow to get a transaction manager.
52: * @return a transaction manager.
53: */
54: public static TransactionManager getTransactionManager() {
55: if (tm != null) {
56: return tm;
57: }
58:
59: // get it.
60: try {
61: tm = (TransactionManager) new InitialContext()
62: .lookup(TMComponent.JNDI_NAME);
63: } catch (NamingException e) {
64: throw new IllegalStateException(
65: "Cannot get transaction manager", e);
66: }
67: return tm;
68: }
69: }
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