/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 io.milton.event;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author brad
*/
public class EventManagerImpl implements EventManager {
private final static Logger log = LoggerFactory.getLogger(EventManagerImpl.class);
private final List<Registration> registrations = new CopyOnWriteArrayList<Registration>();
@Override
public void fireEvent(Event e) {
log.trace("fireEvent: {}", e.getClass());
for (Registration r : registrations) {
if (r.clazz.isAssignableFrom(e.getClass())) {
long tm = System.currentTimeMillis();
r.listener.onEvent(e);
if (log.isTraceEnabled()) {
log.trace(" fired on: {} completed in {}ms", r.listener.getClass(), (System.currentTimeMillis() - tm));
}
}
}
}
@Override
public synchronized <T extends Event> void registerEventListener(EventListener l, Class<T> c) {
log.info("registerEventListener: " + l.getClass().getCanonicalName() + " - " + c.getCanonicalName());
Registration r = new Registration(l, c);
registrations.add(r);
}
private class Registration {
private final EventListener listener;
private final Class<? extends Event> clazz;
public Registration(EventListener listener, Class<? extends Event> clazz) {
this.listener = listener;
this.clazz = clazz;
}
}
}