01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: 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.internal.cs.messages;
22:
23: import com.db4o.internal.*;
24: import com.db4o.internal.slots.*;
25:
26: public final class MReadBytes extends MsgD implements ServerSideMessage {
27:
28: public final Buffer getByteLoad() {
29: int address = _payLoad.readInt();
30: int length = _payLoad.length() - (Const4.INT_LENGTH);
31: Slot slot = new Slot(address, length);
32: _payLoad.removeFirstBytes(Const4.INT_LENGTH);
33: _payLoad.useSlot(slot);
34: return this ._payLoad;
35: }
36:
37: public final MsgD getWriter(StatefulBuffer bytes) {
38: MsgD message = getWriterForLength(bytes.getTransaction(), bytes
39: .length()
40: + Const4.INT_LENGTH);
41: message._payLoad.writeInt(bytes.getAddress());
42: message._payLoad.append(bytes._buffer);
43: return message;
44: }
45:
46: public final boolean processAtServer() {
47: int address = readInt();
48: int length = readInt();
49: synchronized (streamLock()) {
50: StatefulBuffer bytes = new StatefulBuffer(this
51: .transaction(), address, length);
52: try {
53: stream().readBytes(bytes._buffer, address, length);
54: write(getWriter(bytes));
55: } catch (Exception e) {
56: // TODO: not nicely handled on the client side yet
57: write(Msg.NULL);
58: }
59: }
60: return true;
61: }
62: }
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