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Java > Open Source Codes > org > objectweb > dream > queue > SequenceNumberChunk


1 /**
2  * Dream
3  * Copyright (C) 2003-2004 INRIA Rhone-Alpes
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18  *
19  * Contact: dream@objectweb.org
20  *
21  * Initial developer(s): Vivien Quema
22  * Contributor(s):
23  */
24
25 package org.objectweb.dream.queue;
26
27 import org.objectweb.dream.message.ChunkType;
28 import org.objectweb.dream.message.ChunkTypeImpl;
29
30 /**
31  * Chunk interface for messages that have to be sequentially ordered.
32  */
33 public interface SequenceNumberChunk
34 {
35
36   /** The default name for chunks of this type. */
37   String JavaDoc DEFAULT_NAME = "sequenceNumberChunk";
38
39   /** The Chunk type of chunks that implements this interface. */
40   ChunkType TYPE = new ChunkTypeImpl(SequenceNumberChunk.class,
41                              SequenceNumberChunkImpl.class);
42
43   /**
44    * Returns the sequence number of this message.
45    *
46    * @return the sequence number of this message.
47    */
48   long getSequenceNumber();
49
50   /**
51    * Sets the sequence number of this message.
52    *
53    * @param sn the sequence number to set.
54    */
55   void setSequenceNumber(long sn);
56
57 }
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