/**
* 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 org.apache.camel.component.event;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;
import org.apache.camel.impl.DefaultComponent;
import org.apache.camel.impl.UriEndpointComponent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ConfigurableApplicationContext;
/**
* An <a href="http://camel.apache.org/event.html">Event Component</a>
* for working with Spring ApplicationEvents.
*
* @version
*/
public class EventComponent extends UriEndpointComponent implements ApplicationContextAware {
private static final Logger LOG = LoggerFactory.getLogger(EventComponent.class);
private ApplicationContext applicationContext;
private final Set<EventEndpoint> endpoints = new LinkedHashSet<EventEndpoint>();
public EventComponent() {
super(EventEndpoint.class);
}
public EventComponent(ApplicationContext applicationContext) {
super(EventEndpoint.class);
setApplicationContext(applicationContext);
}
public ApplicationContext getApplicationContext() {
return applicationContext;
}
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
public ConfigurableApplicationContext getConfigurableApplicationContext() {
ApplicationContext applicationContext = getApplicationContext();
if (applicationContext instanceof ConfigurableApplicationContext) {
return (ConfigurableApplicationContext)applicationContext;
} else {
throw new IllegalArgumentException("Class: " + applicationContext.getClass().getName() + " is not an instanceof ConfigurableApplicationContext.");
}
}
protected EventEndpoint createEndpoint(String uri, String remaining, Map<String, Object> parameters) throws Exception {
EventEndpoint answer = new EventEndpoint(uri, this);
setProperties(answer, parameters);
return answer;
}
protected void consumerStarted(EventEndpoint endpoint) {
endpoints.add(endpoint);
}
protected void consumerStopped(EventEndpoint endpoint) {
endpoints.remove(endpoint);
}
public void onApplicationEvent(ApplicationEvent event) {
// broadcast to the endpoints in use
for (EventEndpoint endpoint : endpoints) {
try {
endpoint.onApplicationEvent(event);
} catch (Exception e) {
LOG.warn("Error on application event " + event + ". This exception will be ignored.", e);
}
}
}
@Override
protected void doStop() throws Exception {
endpoints.clear();
super.doStop();
}
}