package org.jacorb.notification.filter;
/*
* 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.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.logger.Logger;
import org.jacorb.notification.conf.Attributes;
import org.jacorb.notification.conf.Default;
import org.jacorb.notification.interfaces.Disposable;
import org.jacorb.notification.interfaces.GCDisposable;
import org.jacorb.notification.lifecycle.IServantLifecyle;
import org.jacorb.notification.lifecycle.ServantLifecyleControl;
import org.jacorb.notification.util.DisposableManager;
import org.jacorb.notification.util.LogUtil;
import org.omg.CORBA.Any;
import org.omg.CORBA.ORB;
import org.omg.CosNotifyFilter.Filter;
import org.omg.CosNotifyFilter.FilterFactoryPOA;
import org.omg.CosNotifyFilter.FilterHelper;
import org.omg.CosNotifyFilter.InvalidGrammar;
import org.omg.CosNotifyFilter.MappingFilter;
import org.omg.CosNotifyFilter.MappingFilterHelper;
import org.omg.PortableServer.POA;
import org.omg.PortableServer.Servant;
import edu.emory.mathcs.backport.java.util.concurrent.atomic.AtomicBoolean;
/**
* @author Alphonse Bendt
* @version $Id: FilterFactoryImpl.java,v 1.7 2006/01/21 00:45:41 alphonse.bendt Exp $
*/
public class FilterFactoryImpl extends FilterFactoryPOA implements Disposable, IServantLifecyle
{
private class GCThread extends Thread implements Disposable
{
private final AtomicBoolean active = new AtomicBoolean(true);
public GCThread()
{
super();
setName("NotificationService Filter GC");
setPriority(Thread.MIN_PRIORITY + 1);
}
public void run()
{
while (active.get())
{
try
{
Thread.sleep(1000);
runLoop();
} catch (InterruptedException e)
{
// ignore. will check active_
}
}
logger_.info("GCThread exits");
}
private void runLoop() throws InterruptedException
{
synchronized (allFiltersLock_)
{
Iterator i = new ArrayList(allFilters_).iterator();
while (i.hasNext())
{
GCDisposable item = (GCDisposable) i.next();
try
{
item.attemptDispose();
} catch (Exception e)
{
i.remove();
}
verifyIsActive();
}
}
}
private void verifyIsActive() throws InterruptedException
{
if (!active.get())
{
throw new InterruptedException();
}
}
public void dispose()
{
logger_.info("Shutdown GCThread");
active.set(false);
}
}
private final ORB orb_;
private final POA poa_;
private final DisposableManager disposeHooks_ = new DisposableManager();
private final List allFilters_ = new ArrayList();
private final Object allFiltersLock_ = new Object();
protected final Logger logger_;
private final IFilterFactoryDelegate factoryDelegate_;
private final boolean useGarbageCollector_;
private final Configuration config_;
private final ServantLifecyleControl servantLifecycle_;
// //////////////////////////////////////
public FilterFactoryImpl(ORB orb, POA poa, Configuration config,
IFilterFactoryDelegate factoryDelegate)
{
super();
orb_ = orb;
poa_ = poa;
factoryDelegate_ = factoryDelegate;
config_ = config;
logger_ = LogUtil.getLogger(config, getClass().getName());
useGarbageCollector_ = config.getAttributeAsBoolean(Attributes.USE_GC,
Default.DEFAULT_USE_GC);
if (useGarbageCollector_)
{
logger_.info("Enable Garbage Collection for Filters");
final GCThread _gcThread = new GCThread();
addDisposeHook(_gcThread);
_gcThread.start();
}
servantLifecycle_ = new ServantLifecyleControl(this, config);
}
public final void addDisposeHook(Disposable d)
{
disposeHooks_.addDisposable(d);
}
public final Filter create_filter(String grammar) throws InvalidGrammar
{
final AbstractFilter _servant = factoryDelegate_.create_filter_servant(grammar);
registerFilter(_servant);
Filter _filter = FilterHelper.narrow(_servant.activate());
return _filter;
}
public MappingFilter create_mapping_filter(String grammar, Any any) throws InvalidGrammar
{
MappingFilterImpl _mappingFilterServant = factoryDelegate_.create_mapping_filter_servant(
config_, grammar, any);
registerFilter(_mappingFilterServant);
MappingFilter _filter = MappingFilterHelper.narrow(_mappingFilterServant.activate());
return _filter;
}
private final void registerFilter(final GCDisposable filter)
{
if (useGarbageCollector_)
{
synchronized (allFiltersLock_)
{
allFilters_.add(filter);
filter.registerDisposable(new Disposable()
{
public void dispose()
{
synchronized (allFiltersLock_)
{
allFilters_.remove(filter);
}
}
});
}
}
}
public final void deactivate()
{
servantLifecycle_.deactivate();
}
public Servant newServant()
{
return this;
}
public final org.omg.CORBA.Object activate()
{
return servantLifecycle_.activate();
}
public final void dispose()
{
try
{
deactivate();
} finally
{
disposeHooks_.dispose();
}
}
protected final ORB getORB()
{
return orb_;
}
public POA getPOA()
{
return poa_;
}
}