/*
* 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.logging.log4j.core.config.plugins.osgi;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.plugins.util.PluginManager;
import org.apache.logging.log4j.core.util.BundleResourceLoader;
import org.apache.logging.log4j.status.StatusLogger;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.SynchronousBundleListener;
/**
* OSGi BundleActivator.
*/
public final class Activator implements BundleActivator, SynchronousBundleListener {
private static final Logger LOGGER = StatusLogger.getLogger();
private final AtomicReference<BundleContext> context = new AtomicReference<BundleContext>();
@Override
public void start(final BundleContext context) throws Exception {
if (this.context.compareAndSet(null, context)) {
context.addBundleListener(this);
// done after the BundleListener as to not miss any new bundle installs in the interim
scanInstalledBundlesForPlugins(context);
}
}
private static void scanInstalledBundlesForPlugins(final BundleContext context) {
final Bundle[] bundles = context.getBundles();
for (final Bundle bundle : bundles) {
if (bundle.getState() == Bundle.ACTIVE) {
// TODO: bundle state can change during this
scanBundleForPlugins(bundle);
}
}
}
private static void scanBundleForPlugins(final Bundle bundle) {
LOGGER.trace("Scanning bundle [{}] for plugins.", bundle.getSymbolicName());
PluginManager.loadPlugins(new BundleResourceLoader(bundle));
}
@Override
public void stop(final BundleContext context) throws Exception {
// not much can be done that isn't already automated by the framework
this.context.compareAndSet(context, null);
}
@Override
public void bundleChanged(BundleEvent event) {
switch (event.getType()) {
case BundleEvent.STARTED:
scanBundleForPlugins(event.getBundle());
break;
default:
break;
}
}
}