/*
* JBoss, Home of Professional Open Source
* Copyright 2009, Red Hat Middleware LLC, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.arquillian.impl.event;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.jboss.arquillian.impl.Validate;
import org.jboss.arquillian.spi.Context;
import org.jboss.arquillian.spi.event.Event;
import org.jboss.arquillian.spi.event.suite.EventHandler;
/**
* EventManager
*
* @author <a href="mailto:aknutsen@redhat.com">Aslak Knutsen</a>
* @version $Revision: $
*/
@SuppressWarnings("unchecked")
public class MapEventManager implements EventManager
{
private Map<Class<? extends Event>, List<EventHandler>> handlerRegistry;
public MapEventManager()
{
this.handlerRegistry = new ConcurrentHashMap<Class<? extends Event>, List<EventHandler>>();
}
public void fire(Context context, Event event)
{
Validate.notNull(context, "Context must be specified");
Validate.notNull(event, "Event must be specified");
List<EventHandler> handlers = handlerRegistry.get(event.getClass());
if(handlers != null)
{
try
{
/*
We need to use old style of for loop to avoid ConcurrentModificationException
A handler could add a listener to the same event in it's callback.
ie: a DeployableContainer adding a SessionLifecyle handler to be added to the @BeforeClass
*/
for(int i = 0; i < handlers.size(); i++)
{
EventHandler handler = handlers.get(i);
handler.callback(context, event);
}
}
catch (Exception e)
{
throw new FiredEventException(context, event, e);
}
}
}
// TODO: look at concurrency of add / list
public <K extends Event> void register(Class<? extends K> eventType, EventHandler<? super K> handler)
{
Validate.notNull(eventType, "EventType must be specified");
Validate.notNull(handler, "EventHandler must be specified");
List<EventHandler> handlers = handlerRegistry.get(eventType);
if(handlers == null)
{
handlers = new ArrayList<EventHandler>();
}
handlers.add(handler);
handlerRegistry.put(eventType, handlers);
}
}