/*
* 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.karaf.bundle.state.spring.internal;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.karaf.bundle.core.BundleState;
import org.apache.karaf.bundle.core.BundleStateService;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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;
public class SpringStateService implements OsgiBundleApplicationContextListener,
BundleListener, BundleStateService {
private static final Logger LOG = LoggerFactory.getLogger(SpringStateService.class);
private final Map<Long, OsgiBundleApplicationContextEvent> states;
public SpringStateService() {
this.states = new ConcurrentHashMap<Long, OsgiBundleApplicationContextEvent>();
}
public String getName() {
return BundleStateService.NAME_SPRING_DM;
}
public BundleState getState(Bundle bundle) {
OsgiBundleApplicationContextEvent event = states.get(bundle.getBundleId());
BundleState state = mapEventToState(event);
return (bundle.getState() != Bundle.ACTIVE) ? BundleState.Unknown : state;
}
public String getDiag(Bundle bundle) {
OsgiBundleApplicationContextEvent event = states.get(bundle.getBundleId());
if (event == null) {
return null;
}
StringBuilder message = new StringBuilder();
Date date = new Date(event.getTimestamp());
SimpleDateFormat df = new SimpleDateFormat();
message.append(df.format(date) + "\n");
Throwable ex = getException(event);
if (ex != null) {
message.append("Exception: \n");
addMessages(message, ex);
}
return message.toString();
}
private void addMessages(StringBuilder message, Throwable ex) {
if (ex != null) {
message.append(ex.getMessage());
message.append("\n");
StringWriter errorWriter = new StringWriter();
ex.printStackTrace(new PrintWriter(errorWriter));
message.append(errorWriter.toString());
message.append("\n");
}
}
private Throwable getException(OsgiBundleApplicationContextEvent event) {
if (!(event instanceof OsgiBundleContextFailedEvent)) {
return null;
}
OsgiBundleContextFailedEvent failureEvent = (OsgiBundleContextFailedEvent) event;
return failureEvent.getFailureCause();
}
public void onOsgiApplicationEvent(OsgiBundleApplicationContextEvent event) {
if (LOG.isDebugEnabled()) {
BundleState state = mapEventToState(event);
LOG.debug("Spring app state changed to " + state + " for bundle " + event.getBundle().getBundleId());
}
states.put(event.getBundle().getBundleId(), event);
}
private BundleState mapEventToState(OsgiBundleApplicationContextEvent event) {
if (event == null) {
return BundleState.Unknown;
} else if (event instanceof BootstrappingDependencyEvent) {
return BundleState.Waiting;
} else if (event instanceof OsgiBundleContextFailedEvent) {
return BundleState.Failure;
} else if (event instanceof OsgiBundleContextRefreshedEvent) {
return BundleState.Active;
} else {
return BundleState.Unknown;
}
}
public void bundleChanged(BundleEvent event) {
if (event.getType() == BundleEvent.UNINSTALLED) {
states.remove(event.getBundle().getBundleId());
}
}
}