/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.kernel.plugins.dependency;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.CopyOnWriteArrayList;
import org.jboss.beans.metadata.spi.BeanMetaData;
import org.jboss.beans.metadata.spi.SupplyMetaData;
import org.jboss.dependency.plugins.ScopedController;
import org.jboss.dependency.plugins.action.ControllerContextAction;
import org.jboss.dependency.spi.Controller;
import org.jboss.dependency.spi.ControllerContext;
import org.jboss.dependency.spi.ControllerState;
import org.jboss.kernel.Kernel;
import org.jboss.kernel.api.dependency.Matcher;
import org.jboss.kernel.plugins.event.AbstractEventEmitter;
import org.jboss.kernel.spi.dependency.KernelController;
import org.jboss.kernel.spi.dependency.KernelControllerContext;
import org.jboss.kernel.spi.event.KernelEvent;
import org.jboss.kernel.spi.event.KernelEventFilter;
import org.jboss.kernel.spi.event.KernelEventListener;
import org.jboss.kernel.spi.registry.KernelRegistryEntry;
import org.jboss.kernel.spi.registry.KernelRegistryPlugin;
/**
* Abstract Kernel controller.
*
* @author <a href="adrian@jboss.com">Adrian Brock</a>
* @author <a href="ales.justin@jboss.com">Ales Justin</a>
* @version $Revision: 101820 $
*/
@SuppressWarnings("deprecation")
public class AbstractKernelController extends ScopedController implements KernelController, KernelRegistryPlugin
{
/** The kernel */
protected Kernel kernel;
/** The emitter delegate */
protected AbstractEventEmitter emitterDelegate = createEventEmitter();
/** The supplies */
protected ConcurrentMap<Object, List<KernelControllerContext>> suppliers = new ConcurrentHashMap<Object, List<KernelControllerContext>>();
/**
* Create an abstract kernel controller
*
* @throws Exception for any error
*/
public AbstractKernelController() throws Exception
{
}
protected Map<ControllerState, ControllerContextAction> createAliasActions()
{
Map<ControllerState, ControllerContextAction> map = new HashMap<ControllerState, ControllerContextAction>(super.createAliasActions());
map.put(ControllerState.PRE_INSTALL, InstallScopeAction.INSTANCE);
return map;
}
/**
* Create event emitter.
*
* @return new abstract event emitter instance
*/
protected AbstractEventEmitter createEventEmitter()
{
return new AbstractEventEmitter();
}
public KernelControllerContext install(BeanMetaData metaData) throws Throwable
{
return install(metaData, null);
}
public KernelControllerContext install(BeanMetaData metaData, Object target) throws Throwable
{
KernelControllerContext context = new AbstractKernelControllerContext(null, metaData, target);
install(context);
return context;
}
public KernelRegistryEntry getEntry(Object name)
{
List<KernelControllerContext> list;
if (name instanceof Matcher)
list = matchSupplies((Matcher)name);
else
list = suppliers.get(name);
if (list != null && list.isEmpty() == false)
return list.get(0);
else
return null;
}
/**
* Try matching supplies.
*
* @param matcher the matcher
* @return list of context's who have a matching supply
*/
protected List<KernelControllerContext> matchSupplies(Matcher matcher)
{
List<KernelControllerContext> list = null;
for(Map.Entry<Object, List<KernelControllerContext>> entry : suppliers.entrySet())
{
if (matcher.match(entry.getKey()))
{
if (matcher.needExactMatch() == false)
return entry.getValue();
else
{
if (list != null)
throw new IllegalArgumentException("Matcher " + matcher + " only takes exact match, but found second matching supplier.");
else
list = entry.getValue();
}
}
}
return list;
}
@Override
public ControllerContext getContextInternal(Object name, ControllerState state, boolean enableOnDemand, Controller initiatingController)
{
ControllerContext context = super.getContextInternal(name, state, enableOnDemand, initiatingController);
if (context != null)
return context;
// simple qualifier key
if (name instanceof QualifierKey)
{
QualifierKey qm = (QualifierKey)name;
return qm.search(this);
}
if (state == null || indexedInstalledState.equals(state) || getStates().isAfterState(state, indexedInstalledState))
{
org.jboss.kernel.spi.registry.KernelRegistry registry = kernel.getRegistry();
try
{
return registry.findEntry(name);
}
catch (Throwable ignored)
{
}
}
return null;
}
public void addSupplies(KernelControllerContext context)
{
BeanMetaData metaData = context.getBeanMetaData();
Set<SupplyMetaData> supplies = metaData.getSupplies();
if (supplies != null)
{
boolean trace = log.isTraceEnabled();
if (supplies.isEmpty() == false)
{
lockWrite();
try
{
for (SupplyMetaData supplied : supplies)
{
Object supply = supplied.getSupply();
List<KernelControllerContext> list = suppliers.get(supply);
if (list == null)
{
list = new CopyOnWriteArrayList<KernelControllerContext>();
List<KernelControllerContext> old = suppliers.putIfAbsent(supply, list);
if (old != null)
list = old;
}
list.add(context);
if (trace)
log.trace("Suppliers of " + supply + ": " + list);
}
}
finally
{
unlockWrite();
}
}
}
}
public void removeSupplies(KernelControllerContext context)
{
BeanMetaData metaData = context.getBeanMetaData();
Set<SupplyMetaData> supplies = metaData.getSupplies();
if (supplies != null)
{
boolean trace = log.isTraceEnabled();
if (supplies.isEmpty() == false)
{
lockWrite();
try
{
for (SupplyMetaData supplied : supplies)
{
Object supply = supplied.getSupply();
List<KernelControllerContext> list = suppliers.get(supply);
if (list != null)
{
list.remove(context);
if (list.isEmpty())
suppliers.remove(supply);
if (trace)
log.trace("Suppliers of " + supply + ": " + list);
}
}
}
finally
{
unlockWrite();
}
}
}
}
public Kernel getKernel()
{
Kernel.checkAccess();
return kernel;
}
public void setKernel(Kernel kernel) throws Throwable
{
Kernel.checkConfigure();
this.kernel = kernel;
}
public void fireKernelEvent(KernelEvent event)
{
emitterDelegate.fireKernelEvent(event);
}
public void registerListener(KernelEventListener listener, KernelEventFilter filter, Object handback) throws Throwable
{
emitterDelegate.registerListener(listener, filter, handback);
}
public void unregisterListener(KernelEventListener listener, KernelEventFilter filter, Object handback) throws Throwable
{
emitterDelegate.unregisterListener(listener, filter, handback);
}
}