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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.concurrent.ConcurrencyUtil;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.io.ExtendedDataOutputStream;
import org.eclipse.net4j.util.om.monitor.IMonitor;
import org.eclipse.net4j.util.om.monitor.Monitor;
import org.eclipse.net4j.util.om.monitor.MonitorCanceledException;
import org.eclipse.internal.net4j.bundle.OM;
import java.util.concurrent.ExecutorService;
/**
* @author Eike Stepper
* @since 2.0
*/
public abstract class IndicationWithMonitoring extends IndicationWithResponse
{
private Monitor monitor;
private long lastMonitorAccess;
/**
* @since 2.0
*/
public IndicationWithMonitoring(SignalProtocol<?> protocol, short id, String name)
{
super(protocol, id, name);
}
/**
* @since 2.0
*/
public IndicationWithMonitoring(SignalProtocol<?> protocol, short signalID)
{
super(protocol, signalID);
}
/**
* @since 2.0
*/
public IndicationWithMonitoring(SignalProtocol<?> protocol, Enum<?> literal)
{
super(protocol, literal);
}
@Override
protected void execute(BufferInputStream in, BufferOutputStream out) throws Exception
{
try
{
super.execute(in, out);
}
finally
{
monitor = null;
}
}
@Override
protected final void indicating(ExtendedDataInputStream in) throws Exception
{
final long monitorProgressInterval = in.readLong();
ExecutorService executorService = getMonitoringExecutorService();
if (executorService != null)
{
monitor = new LastAccessMonitor();
setLastMonitorAccess();
executorService.execute(new Runnable()
{
public void run()
{
while (monitor != null)
{
if (System.currentTimeMillis() - lastMonitorAccess > monitorProgressInterval)
{
setMonitorCanceled();
break;
}
sendProgress(monitor.getTotalWork(), monitor.getWork());
ConcurrencyUtil.sleep(monitorProgressInterval);
}
}
private void sendProgress(int totalWork, int work)
{
try
{
new MonitorProgressRequest(getProtocol(), -getCorrelationID(), totalWork, work).sendAsync();
}
catch (Exception ex)
{
OM.LOG.error(ex);
}
}
});
}
indicating(in, monitor.fork(getIndicatingWorkPercent()));
}
@Override
protected final void responding(ExtendedDataOutputStream out) throws Exception
{
responding(out, monitor.fork(getRespondingWorkPercent()));
}
protected abstract void indicating(ExtendedDataInputStream in, IMonitor monitor) throws Exception;
protected abstract void responding(ExtendedDataOutputStream out, IMonitor monitor) throws Exception;
/**
* @since 2.0
*/
protected ExecutorService getMonitoringExecutorService()
{
return getProtocol().getExecutorService();
}
protected int getIndicatingWorkPercent()
{
return 50;
}
protected int getRespondingWorkPercent()
{
return 50;
}
void setMonitorCanceled()
{
if (monitor != null)
{
monitor.cancel();
}
}
void setLastMonitorAccess()
{
lastMonitorAccess = System.currentTimeMillis();
}
/**
* @author Eike Stepper
*/
private final class LastAccessMonitor extends Monitor
{
@Override
public synchronized void begin(int totalWork)
{
setLastMonitorAccess();
super.begin(totalWork);
}
@Override
public synchronized void checkCanceled() throws MonitorCanceledException
{
setLastMonitorAccess();
super.checkCanceled();
}
@Override
public synchronized boolean isCanceled()
{
setLastMonitorAccess();
return super.isCanceled();
}
@Override
public synchronized void worked(int work)
{
setLastMonitorAccess();
super.worked(work);
}
}
}
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