package org.jacorb.notification.engine;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 1999-2004 Gerald Brose
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.jacorb.notification.interfaces.FilterStage;
import org.jacorb.notification.interfaces.Message;
import org.omg.CORBA.AnyHolder;
import org.omg.CosNotifyFilter.UnsupportedFilterableData;
/**
* @author Alphonse Bendt
* @version $Id: FilterProxySupplierTask.java,v 1.21 2005-11-11 19:37:44 alphonse.bendt Exp $
*/
public class FilterProxySupplierTask extends AbstractFilterTask
{
static class AlternateMessageMap
{
private final Map alternateMessages_;
//////////////////////////////
public AlternateMessageMap()
{
this(new HashMap());
}
AlternateMessageMap(Map m)
{
alternateMessages_ = m;
}
//////////////////////////////
public Message getAlternateMessage(FilterStage s)
{
if (alternateMessages_.containsKey(s))
{
return (Message) alternateMessages_.get(s);
}
return null;
}
public void putAlternateMessage(FilterStage s, Message e)
{
alternateMessages_.put(s, e);
}
public void clear()
{
alternateMessages_.clear();
}
}
public static final AlternateMessageMap EMPTY_MAP =
new AlternateMessageMap(Collections.EMPTY_MAP)
{
public void clear()
{
// nothing to do
}
};
////////////////////////////////////////
final AlternateMessageMap changedMessages_ = new AlternateMessageMap();
private static int sCount = 0;
private int id_ = ++sCount;
////////////////////////////////////////
public FilterProxySupplierTask(TaskFactory taskFactory, TaskExecutor taskExecutor)
{
super(taskFactory, taskExecutor);
}
////////////////////////////////////////
public String toString()
{
return "[FilterProxySupplierTask#" + id_ + "]";
}
public void reset()
{
super.reset();
changedMessages_.clear();
}
public void doFilter() throws InterruptedException
{
filter();
getTaskFactory().enqueueMessage(this);
}
private Message updatePriority(int indexOfCurrentEvent, Message message)
{
AnyHolder _priorityFilterResult = new AnyHolder();
Message _currentMessage = message;
try
{
boolean priorityMatch = message.match(arrayCurrentFilterStage_[indexOfCurrentEvent]
.getPriorityFilter(), _priorityFilterResult);
if (priorityMatch)
{
_currentMessage = (Message) getMessage().clone();
_currentMessage.setPriority(_priorityFilterResult.value.extract_long());
}
} catch (UnsupportedFilterableData e)
{
if (logger_.isDebugEnabled())
{
logger_.debug("unable to evaluate PriorityFilter", e);
}
else if (logger_.isInfoEnabled())
{
logger_.info("unable to evaluate PriorityFilter");
}
}
return _currentMessage;
}
private Message updateTimeout(int indexOfCurrentFilterStage, Message message)
{
AnyHolder _lifetimeFilterResult = new AnyHolder();
Message _currentMessage = message;
try
{
boolean lifetimeMatch = _currentMessage.match(
arrayCurrentFilterStage_[indexOfCurrentFilterStage].getLifetimeFilter(),
_lifetimeFilterResult);
if (lifetimeMatch && (_currentMessage == getMessage()))
{
// LifeTime Mapping Filter matched and current Message
// was not copied yet. This depends on the fact that
// updatePriority was run before.
_currentMessage = (Message) getMessage().clone();
_currentMessage.setTimeout(_lifetimeFilterResult.value.extract_long());
}
} catch (UnsupportedFilterableData e)
{
if (logger_.isDebugEnabled())
{
logger_.debug("unable to evaluate PriorityFilter", e);
}
else if (logger_.isInfoEnabled())
{
logger_.info("unable to evaluate PriorityFilter");
}
}
return _currentMessage;
}
private void filter()
{
for (int x = 0; x < arrayCurrentFilterStage_.length; ++x)
{
boolean _forward = false;
if (!arrayCurrentFilterStage_[x].isDestroyed())
{
Message _currentMessage = getMessage();
if (arrayCurrentFilterStage_[x].hasPriorityFilter())
{
_currentMessage = updatePriority(x, _currentMessage);
}
if (arrayCurrentFilterStage_[x].hasLifetimeFilter())
{
_currentMessage = updateTimeout(x, _currentMessage);
}
if (_currentMessage != getMessage())
{
// MappingFilter attached to a particular
// FilterStage did change (Timeout or Priority)
// the current Message.
// store changed Message in Map for later use.
changedMessages_.putAlternateMessage(arrayCurrentFilterStage_[x],
_currentMessage);
}
_forward = _currentMessage.match(arrayCurrentFilterStage_[x]);
}
if (_forward)
{
// the subsequent destination filters need to be eval'd
addFilterStage(arrayCurrentFilterStage_[x].getSubsequentFilterStages());
}
}
}
}