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Java > Open Source Codes > com > db4o > cs > messages > MReadObject


1 /* Copyright (C) 2004 - 2006 db4objects Inc. http://www.db4o.com
2
3 This file is part of the db4o open source object database.
4
5 db4o is free software; you can redistribute it and/or modify it under
6 the terms of version 2 of the GNU General Public License as published
7 by the Free Software Foundation and as clarified by db4objects' GPL
8 interpretation policy, available at
9 http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10 Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11 Suite 350, San Mateo, CA 94403, USA.
12
13 db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 package com.db4o.cs.messages;
22
23 import com.db4o.*;
24 import com.db4o.cs.*;
25
26 public final class MReadObject extends MsgD {
27     
28     public final boolean processAtServer(YapServerThread serverThread) {
29         YapWriter bytes = null;
30
31         // readObjectByID may fail in certain cases
32 // we should look for the cause at some time in the future
33
34         synchronized (streamLock()) {
35             try {
36                 bytes = stream().readWriterByID(transaction(), _payLoad.readInt());
37             } catch (Exception JavaDoc e) {
38                 if (Deploy.debug) {
39                     System.out.println("MsD.ReadObject:: readObjectByID failed");
40                 }
41             }
42         }
43         if (bytes == null) {
44             bytes = new YapWriter(transaction(), 0, 0);
45         }
46         serverThread.write(Msg.OBJECT_TO_CLIENT.getWriter(bytes));
47         return true;
48     }
49 }
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