01: /**
02: * EasyBeans
03: * Copyright (C) 2006 Bull S.A.S.
04: * Contact: easybeans@ow2.org
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2.1 of the License, or any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19: * USA
20: *
21: * --------------------------------------------------------------------------
22: * $Id: Message.java 1970 2007-10-16 11:49:25Z benoitf $
23: * --------------------------------------------------------------------------
24: */package org.ow2.easybeans.component.smartclient.api;
25:
26: import java.nio.ByteBuffer;
27:
28: /**
29: * All messages needs to implement this interface.
30: * @author Florent Benoit
31: */
32: public interface Message {
33:
34: /**
35: * Size to store an int in bytes.
36: */
37: int INT_BYTE_SIZE = 4;
38:
39: /**
40: * Header.
41: * <ul>
42: * <li> byte = version</li>
43: * <li> byte = opcode</li>
44: * <li> int = length</li>
45: * </ul>
46: */
47: int HEADER_SIZE = 1 + 1 + INT_BYTE_SIZE;
48:
49: /**
50: * Gets the OpCode of this message.
51: * @return the operation code.
52: */
53: byte getOpCode();
54:
55: /**
56: * Gets a message to send.
57: * @return the bytebuffer to send
58: */
59: ByteBuffer getMessage();
60: }
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