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.mq.server;
23:
24: import javax.jms.JMSException;
25:
26: import org.jboss.mq.SpyDestination;
27: import org.jboss.mq.Subscription;
28:
29: /**
30: * This class implements a basic queue with an exclusive subscription.
31: *
32: * @author Adrian Brock (Adrian.Brock@HappeningTimes.com)
33: * @created 28th October 2002
34: */
35: public class ExclusiveQueue extends BasicQueue {
36: Subscription exclusive;
37: boolean removed = false;
38:
39: public ExclusiveQueue(JMSDestinationManager server,
40: SpyDestination destination, Subscription exclusive,
41: BasicQueueParameters parameters) throws JMSException {
42: super (server, destination.toString() + "."
43: + exclusive.connectionToken.getClientID() + '.'
44: + exclusive.subscriptionId, parameters);
45: this .exclusive = exclusive;
46: }
47:
48: public Subscription getExclusiveSubscription() {
49: return exclusive;
50: }
51:
52: public void addMessage(MessageReference mesRef,
53: org.jboss.mq.pm.Tx txId) throws JMSException {
54: // Ignore the message if we are not interested
55: if (removed || exclusive.accepts(mesRef.getHeaders()) == false)
56: dropMessage(mesRef);
57: else
58: super .addMessage(mesRef, txId);
59: }
60:
61: public void restoreMessage(MessageReference mesRef) {
62: if (removed)
63: dropMessage(mesRef);
64: else
65: super .restoreMessage(mesRef);
66: }
67:
68: protected void nackMessage(MessageReference mesRef) {
69: if (removed)
70: dropMessage(mesRef);
71: else
72: super .nackMessage(mesRef);
73: }
74:
75: public void removeSubscriber(Subscription sub) {
76: removed = true;
77: super.removeSubscriber(sub);
78: }
79: }
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