/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.cs.internal.messages;
import com.db4o.internal.*;
import com.db4o.internal.slots.*;
public final class MReadSlot extends MsgD implements MessageWithResponse {
public final ByteArrayBuffer getByteLoad() {
int address = _payLoad.readInt();
int length = _payLoad.length() - (Const4.INT_LENGTH);
Slot slot = new Slot(address, length);
_payLoad.removeFirstBytes(Const4.INT_LENGTH);
_payLoad.useSlot(slot);
return this._payLoad;
}
public final MsgD getWriter(StatefulBuffer bytes) {
MsgD message = getWriterForLength(bytes.transaction(), bytes.length() + Const4.INT_LENGTH);
message._payLoad.writeInt(bytes.getAddress());
message._payLoad.append(bytes._buffer);
return message;
}
public final Msg replyFromServer() {
int address = readInt();
int length = readInt();
synchronized (containerLock()) {
StatefulBuffer bytes =
new StatefulBuffer(this.transaction(), address, length);
try {
container().readBytes(bytes._buffer, address, length);
return getWriter(bytes);
} catch (Exception e) {
// TODO: not nicely handled on the client side yet
return Msg.NULL;
}
}
}
}