/*
* 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.features.osgi;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;
import org.apache.karaf.features.FeaturesListener;
import org.apache.karaf.features.FeaturesService;
import org.apache.karaf.features.internal.FeaturesServiceImpl;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.cm.ConfigurationAdmin;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Activator implements BundleActivator {
public static final String FEATURES_SERVICE_CONFIG_FILE = "org.apache.karaf.features.cfg";
private static final Logger LOGGER = LoggerFactory.getLogger(Activator.class);
private BundleContext bundleContext;
private ServiceTracker<ConfigurationAdmin, ConfigurationAdmin> configurationAdminServiceTracker;
private ServiceTracker<FeaturesListener, FeaturesListener> featuresListenerTracker;
private FeaturesServiceImpl featuresService;
private ServiceRegistration<FeaturesService> featuresServiceRegistration;
public Activator() {
}
public void start(final BundleContext bundleContext) throws Exception {
this.bundleContext = bundleContext;
Properties configuration = new Properties();
File configFile = new File(System.getProperty("karaf.etc"), FEATURES_SERVICE_CONFIG_FILE);
if (configFile.isFile() && configFile.canRead()) {
try {
configuration.load(new FileReader(configFile));
} catch (IOException e) {
LOGGER.warn("Error reading configuration file " + configFile.toString(), e);
}
}
featuresService = new FeaturesServiceImpl();
featuresService.setUrls(getString(configuration, "featuresRepositories", ""));
featuresService.setBoot(getString(configuration, "featuresBoot", ""));
featuresService.setBootFeaturesAsynchronous(getBool(configuration, "bootFeaturesAsynchronous", false));
featuresService.setRespectStartLvlDuringFeatureStartup(getBool(configuration, "respectStartLvlDuringFeatureStartup", false));
featuresService.setResolverTimeout(getLong(configuration, "resolverTimeout", 5000));
featuresService.setBundleContext(bundleContext);
featuresListenerTracker = new ServiceTracker<FeaturesListener, FeaturesListener>(
bundleContext,
FeaturesListener.class,
new ServiceTrackerCustomizer<FeaturesListener, FeaturesListener>() {
public FeaturesListener addingService(ServiceReference<FeaturesListener> reference) {
FeaturesListener service = bundleContext.getService(reference);
featuresService.registerListener(service);
return service;
}
public void modifiedService(ServiceReference<FeaturesListener> reference, FeaturesListener service) {
}
public void removedService(ServiceReference<FeaturesListener> reference, FeaturesListener service) {
featuresService.unregisterListener(service);
bundleContext.ungetService(reference);
}
}
);
configurationAdminServiceTracker = new ServiceTracker<ConfigurationAdmin, ConfigurationAdmin>(
bundleContext,
ConfigurationAdmin.class,
new ServiceTrackerCustomizer<ConfigurationAdmin, ConfigurationAdmin>() {
public ConfigurationAdmin addingService(ServiceReference<ConfigurationAdmin> reference) {
ConfigurationAdmin configurationAdmin = bundleContext.getService(reference);
doStart(configurationAdmin);
return configurationAdmin;
}
public void modifiedService(ServiceReference<ConfigurationAdmin> reference, ConfigurationAdmin service) {
}
public void removedService(ServiceReference<ConfigurationAdmin> reference, ConfigurationAdmin service) {
doStop();
}
}
);
featuresListenerTracker.open();
configurationAdminServiceTracker.open();
}
public void stop(BundleContext bundleContext) throws Exception {
if (configurationAdminServiceTracker != null) {
configurationAdminServiceTracker.close();
configurationAdminServiceTracker = null;
}
}
protected void doStart(ConfigurationAdmin configurationAdmin) {
doStop();
try {
featuresService.setConfigAdmin(configurationAdmin);
featuresListenerTracker.open();
featuresService.start();
featuresServiceRegistration = bundleContext.registerService(FeaturesService.class, featuresService, null);
} catch (Exception e) {
LOGGER.error("Error starting FeaturesService", e);
}
}
protected void doStop() {
if (featuresServiceRegistration != null) {
try {
featuresServiceRegistration.unregister();
} catch (IllegalStateException e) {
// Ignore
}
}
featuresListenerTracker.close();
try {
featuresService.stop();
} catch (Exception e) {
LOGGER.warn("Error stopping FeaturesService", e);
}
}
private static String getString(Properties configuration, String key, String def) {
if (configuration.containsKey(key)) {
return configuration.getProperty(key);
} else {
return def;
}
}
private static boolean getBool(Properties configuration, String key, boolean def) {
if (configuration.containsKey(key)) {
return Boolean.parseBoolean(configuration.getProperty(key));
} else {
return def;
}
}
private static long getLong(Properties configuration, String key, long def) {
if (configuration.containsKey(key)) {
return Long.parseLong(configuration.getProperty(key));
} else {
return def;
}
}
}