UPDChunk


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.message;
26  
27  import org.objectweb.dream.message.ChunkType;
28  import org.objectweb.dream.message.ChunkTypeImpl;
29  import org.objectweb.dream.protocol.Process;
30  
31  /**
32   * Chunk interface for UPD messages. An UPD message contains the information
33   * sent from the new leader to the process chosen for becoming the new backup.
34   */
35  public interface UPDChunk
36  {
37    /** The default name for chunks of this type. */
38    String      DEFAULT_NAME = "updChunk";
39  
40    /** The Chunk type of chunks that implements this interface. */
41    ChunkType TYPE         = new ChunkTypeImpl(UPDChunk.class, UPDChunkImpl.class);
42  
43    /**
44     * Returns the process array that is exchanged between the leader and the
45     * backup.
46     * 
47     * @return a process array.
48     */
49    Process  [] getProcesses();
50  
51    /**
52     * Sets the process array that is exchanged between the leader and the backup.
53     * 
54     * @param processes the process array to be set.
55     */
56    void setProcesses(Process  [] processes);
57  
58    /**
59     * Returns the sequence number that is exchanged between the leader and the
60     * backup.
61     * 
62     * @return the sequence number.
63     */
64    long getSequenceNumber();
65  
66    /**
67     * Sets the sequence number that is exchanged between the leader and the
68     * backup.
69     * 
70     * @param sn the sequence number to be set.
71     */
72    void setSequenceNumber(long sn);
73  
74  }
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