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Java > Open Source Codes > org > mr > kernel > services > topics > TopicGatherListener


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
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5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
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11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Amir Shevat.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
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22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
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25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
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32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
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41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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45  */
46 package org.mr.kernel.services.topics;
47
48 import java.util.ArrayList JavaDoc;
49 import java.util.List JavaDoc;
50
51 import org.mr.IMessageListener;
52 import org.mr.core.protocol.MantaBusMessage;
53
54 /**
55  * @author Amir Shevat
56  * Listens to a topic gathers the messages up to a given depth
57  */
58 public class TopicGatherListener implements IMessageListener{
59     List JavaDoc messages = new ArrayList JavaDoc();
60     int depth = 0;
61     
62     public TopicGatherListener(int depth){
63         this.depth =depth;
64     }
65     
66     /**
67      * @return Returns the depth.
68      */
69     public int getDepth() {
70         return depth;
71     }
72     /**
73      * @param depth The depth to set.
74      */
75     public void setDepth(int depth) {
76         this.depth = depth;
77     }
78     /* (non-Javadoc)
79      * @see org.mr.IMessageListener#onMessage(org.mr.core.protocol.MantaBusMessage)
80      */
81     public synchronized void onMessage(MantaBusMessage message) {
82         if(messages.size()< depth){
83             messages.add(message);
84         }
85         
86     }
87     /**
88      * @return Returns the messages.
89      */
90     public List JavaDoc getMessages() {
91         return messages;
92     }
93 }
94
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