blob: 5885a6fbd924c1106b6763eefd3671e5ac2af238 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/***************************************************************************
* Copyright (c) 2004 - 2008 Eike Stepper, Germany.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.net4j.signal;
import org.eclipse.net4j.buffer.BufferInputStream;
import org.eclipse.net4j.buffer.BufferOutputStream;
import org.eclipse.net4j.channel.IChannel;
import org.eclipse.net4j.internal.util.om.trace.ContextTracer;
import org.eclipse.net4j.util.ReflectUtil;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.io.ExtendedDataOutputStream;
import org.eclipse.internal.net4j.bundle.OM;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @author Eike Stepper
*/
public abstract class RequestWithConfirmation<RESULT> extends SignalActor<RESULT>
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_SIGNAL, RequestWithConfirmation.class);
protected RequestWithConfirmation(IChannel channel)
{
super(channel);
}
@Override
protected final void execute(BufferInputStream in, BufferOutputStream out) throws Exception
{
if (TRACER.isEnabled())
{
TRACER.trace("================ Requesting " + ReflectUtil.getSimpleClassName(this)); //$NON-NLS-1$
}
OutputStream wrappedOutputStream = wrapOutputStream(out);
requesting(ExtendedDataOutputStream.wrap(wrappedOutputStream));
finishOutputStream(wrappedOutputStream);
out.flushWithEOS();
if (TRACER.isEnabled())
{
TRACER.trace("================ Confirming " + ReflectUtil.getSimpleClassName(this)); //$NON-NLS-1$
}
InputStream wrappedInputStream = wrapInputStream(in);
RESULT result = confirming(ExtendedDataInputStream.wrap(wrappedInputStream));
finishInputStream(wrappedInputStream);
setResult(result);
}
protected abstract void requesting(ExtendedDataOutputStream out) throws IOException;
/**
* <b>Important Note:</b> The confirmation must not be empty, i.e. the stream must be used at least to read a
* <code>boolean</code>. Otherwise synchronization problems will result!
*/
protected abstract RESULT confirming(ExtendedDataInputStream in) throws IOException;
}
|