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.aspects.txlock;
23:
24: import org.jboss.aop.Advisor;
25: import org.jboss.aop.InstanceAdvisor;
26: import org.jboss.aop.joinpoint.Joinpoint;
27: import org.jboss.aop.metadata.SimpleMetaData;
28: import org.jboss.aop.util.PayloadKey;
29:
30: import javax.naming.InitialContext;
31: import javax.naming.NamingException;
32: import javax.transaction.TransactionManager;
33:
34: /**
35: *
36: * @author <a href="mailto:bill@jboss.org">Bill Burke</a>
37: * @version $Revision: 57186 $
38: */
39: public class TxLockInterceptorFactory implements
40: org.jboss.aop.advice.AspectFactory {
41:
42: private static TransactionManager getTransactionManager() {
43: try {
44: InitialContext ctx = new InitialContext();
45: TransactionManager tm = (TransactionManager) ctx
46: .lookup("java:/TransactionManager");
47: return tm;
48: } catch (NamingException e) {
49: throw new RuntimeException(e);
50: }
51: }
52:
53: public Object createPerVM() {
54: throw new RuntimeException(
55: "this interceptor only supports PER_CLASS and PER_INSTANCE");
56: }
57:
58: public Object createPerClass(Advisor advisor) {
59: QueuedTxLock lock = new QueuedTxLock();
60: advisor.getClassMetaData().addMetaData(QueuedTxLock.TXLOCK,
61: QueuedTxLock.TXLOCK, lock, PayloadKey.TRANSIENT);
62: return new TxLockInterceptor(getTransactionManager(), lock);
63:
64: }
65:
66: public Object createPerInstance(Advisor advisor,
67: InstanceAdvisor instanceAdvisor) {
68: SimpleMetaData instanceData = instanceAdvisor.getMetaData();
69: QueuedTxLock lock = null;
70: synchronized (instanceData) {
71: lock = (QueuedTxLock) instanceData.getMetaData(
72: QueuedTxLock.TXLOCK, QueuedTxLock.TXLOCK);
73: if (lock == null) {
74: lock = new QueuedTxLock();
75: instanceData
76: .addMetaData(QueuedTxLock.TXLOCK,
77: QueuedTxLock.TXLOCK, lock,
78: PayloadKey.TRANSIENT);
79: }
80: }
81: return new TxLockInterceptor(getTransactionManager(), lock);
82: }
83:
84: public Object createPerJoinpoint(Advisor advisor, Joinpoint jp) {
85: throw new RuntimeException(
86: "this interceptor only supports PER_CLASS and PER_INSTANCE");
87: }
88:
89: public Object createPerJoinpoint(Advisor advisor,
90: InstanceAdvisor instanceAdvisor, Joinpoint jp) {
91: throw new RuntimeException(
92: "this interceptor only supports PER_CLASS and PER_INSTANCE");
93: }
94:
95: public String getName() {
96: return getClass().getName();
97: }
98: }
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