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 javax.jms;
23:
24: /** A <CODE>MessageListener</CODE> object is used to receive asynchronously
25: * delivered messages.
26: *
27: * <P>Each session must insure that it passes messages serially to the
28: * listener. This means that a listener assigned to one or more consumers
29: * of the same session can assume that the <CODE>onMessage</CODE> method
30: * is not called with the next message until the session has completed the
31: * last call.
32: */
33:
34: public interface MessageListener {
35:
36: /** Passes a message to the listener.
37: *
38: * @param message the message passed to the listener
39: */
40:
41: void onMessage(Message message);
42: }
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