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/***************************************************************************
* 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.util.ReflectUtil;
import org.eclipse.net4j.util.StringUtil;
import org.eclipse.net4j.util.WrappedException;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.om.trace.ContextTracer;
import org.eclipse.internal.net4j.bundle.OM;
import java.io.InputStream;
/**
* @author Eike Stepper
*/
public abstract class Indication extends SignalReactor
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_SIGNAL, Indication.class);
/**
* @since 2.0
*/
public Indication(SignalProtocol<?> protocol, short signalID)
{
super(protocol, signalID);
}
@Override
protected void execute(BufferInputStream in, BufferOutputStream out) throws Exception
{
if (TRACER.isEnabled())
{
TRACER.trace("================ Indicating " + ReflectUtil.getSimpleClassName(this)); //$NON-NLS-1$
}
InputStream wrappedInputStream = wrapInputStream(in);
try
{
indicating(ExtendedDataInputStream.wrap(wrappedInputStream));
}
catch (Error ex)
{
OM.LOG.error(ex);
sendExceptionSignal(ex);
throw ex;
}
catch (Exception ex)
{
ex = WrappedException.unwrap(ex);
OM.LOG.error(ex);
sendExceptionSignal(ex);
throw ex;
}
finally
{
finishInputStream(wrappedInputStream);
}
}
protected abstract void indicating(ExtendedDataInputStream in) throws Exception;
/**
* @since 2.0
*/
protected String getMessage(Throwable t)
{
return StringUtil.formatException(t);
}
void sendExceptionSignal(Throwable t) throws Exception
{
SignalProtocol<?> protocol = getProtocol();
int correlationID = -getCorrelationID();
String message = getMessage(t);
new RemoteExceptionRequest(protocol, correlationID, message, t).send();
}
}
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