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Java > Open Source Codes > org > objectweb > dream > protocol > utobcast > SequenceNumber


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.protocol.utobcast;
26
27 /**
28  * This interface defines methods to get, set and imcrement a sequence number.
29  */
30 public interface SequenceNumber
31 {
32   /** The commonly used name to refer to this interface. */
33   String JavaDoc ITF_NAME = "sequence-number";
34
35   /**
36    * Returns the sequence number.
37    *
38    * @return the sequence number.
39    */
40   long getSequenceNumber();
41
42   /**
43    * Sets the sequence number.
44    *
45    * @param sn the value to which the sequence number must be set.
46    */
47   void setSequenceNumber(long sn);
48
49   /**
50    * Increments the sequence number.
51    */
52   void incrementSequenceNumber();
53 }
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