/*
* 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.servicemix.kernel.gshell.osgi;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.osgi.context.BundleContextAware;
import org.springframework.osgi.context.event.OsgiBundleApplicationContextEvent;
import org.springframework.osgi.context.event.OsgiBundleApplicationContextListener;
import org.springframework.osgi.context.event.OsgiBundleContextFailedEvent;
import org.springframework.osgi.context.event.OsgiBundleContextRefreshedEvent;
import org.springframework.osgi.extender.event.BootstrappingDependencyEvent;
import org.springframework.osgi.service.importer.event.OsgiServiceDependencyEvent;
import org.springframework.osgi.service.importer.event.OsgiServiceDependencyWaitStartingEvent;
public class SpringApplicationListener implements OsgiBundleApplicationContextListener,
BundleListener, BundleContextAware,
InitializingBean, DisposableBean {
public static enum SpringState {
Unknown,
Waiting,
Started,
Failed,
}
private static final Log LOG = LogFactory.getLog(SpringApplicationListener.class);
private final Map<Long, SpringState> states;
private BundleContext bundleContext;
public SpringApplicationListener() {
this.states = new ConcurrentHashMap<Long, SpringState>();
}
public SpringState getSpringState(Bundle bundle) {
SpringState state = states.get(bundle.getBundleId());
if (state == null) {
state = SpringState.Unknown;
}
return state;
}
public void onOsgiApplicationEvent(OsgiBundleApplicationContextEvent event) {
SpringState state = null;
if (event instanceof BootstrappingDependencyEvent) {
OsgiServiceDependencyEvent de = ((BootstrappingDependencyEvent) event).getDependencyEvent();
if (de instanceof OsgiServiceDependencyWaitStartingEvent) {
state = SpringState.Waiting;
}
} else if (event instanceof OsgiBundleContextFailedEvent) {
state = SpringState.Failed;
} else if (event instanceof OsgiBundleContextRefreshedEvent) {
state = SpringState.Started;
}
if (state != null) {
LOG.debug("Spring app state changed to " + state + " for bundle " + event.getBundle().getBundleId());
states.put(event.getBundle().getBundleId(), state);
}
}
public void bundleChanged(BundleEvent event) {
if (event.getType() == BundleEvent.UNINSTALLED) {
states.remove(event.getBundle().getBundleId());
}
}
public void setBundleContext(BundleContext bundleContext) {
this.bundleContext = bundleContext;
}
public void afterPropertiesSet() throws Exception {
bundleContext.addBundleListener(this);
}
public void destroy() throws Exception {
bundleContext.removeBundleListener(this);
}
}