| /* |
| * 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.felix.cm.impl; |
| |
| |
| import java.io.IOException; |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.felix.cm.impl.persistence.ExtPersistenceManager; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleException; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.cm.ConfigurationAdmin; |
| import org.osgi.service.log.LogService; |
| import org.osgi.util.tracker.ServiceTracker; |
| import org.osgi.util.tracker.ServiceTrackerCustomizer; |
| |
| /** |
| * The configuration admin starter starts and stops the configuration admin. It |
| * also keeps track of an optional coordinator service. |
| */ |
| public class ConfigurationAdminStarter { |
| |
| private final BundleContext bundleContext; |
| |
| private volatile ConfigurationManager configurationManager; |
| |
| private volatile ExtPersistenceManager persistenceManager; |
| |
| private final AtomicBoolean pluginsAvailable = new AtomicBoolean(false); |
| |
| private volatile String registeredConfigurationPlugins = ""; |
| |
| // service tracker for optional coordinator |
| private volatile ServiceTracker<Object, Object> coordinatorTracker; |
| |
| public ConfigurationAdminStarter(final BundleContext bundleContext) |
| throws BundleException, InvalidSyntaxException |
| { |
| this.bundleContext = bundleContext; |
| } |
| |
| /** |
| * Stop configuration admin |
| */ |
| public void stop( ) |
| { |
| this.deactivate(); |
| } |
| |
| public void activate(final ExtPersistenceManager pm) |
| { |
| try |
| { |
| configurationManager = new ConfigurationManager(pm, bundleContext); |
| // start coordinator tracker |
| this.startCoordinatorTracker(); |
| |
| final ServiceReference<ConfigurationAdmin> ref = configurationManager.start(); |
| configurationManager.updateRegisteredConfigurationPlugins(this.registeredConfigurationPlugins); |
| // update log |
| Log.logger.set(ref); |
| |
| } |
| catch (final IOException ioe ) |
| { |
| Log.logger.log( LogService.LOG_ERROR, "Failure setting up dynamic configuration bindings", ioe ); |
| } |
| } |
| |
| public void deactivate() |
| { |
| this.stopCoordinatorTracker(); |
| if ( this.configurationManager != null ) |
| { |
| this.configurationManager.stop(); |
| this.configurationManager = null; |
| } |
| // update log |
| Log.logger.set(null); |
| } |
| |
| private void startCoordinatorTracker() |
| { |
| this.coordinatorTracker = new ServiceTracker<>(bundleContext, "org.osgi.service.coordinator.Coordinator", |
| new ServiceTrackerCustomizer<Object, Object>() |
| { |
| private final SortedMap<ServiceReference<Object>, Object> sortedServices = new TreeMap<>(); |
| |
| @Override |
| public Object addingService(final ServiceReference<Object> reference) |
| { |
| final Object srv = bundleContext.getService(reference); |
| if ( srv != null ) |
| { |
| synchronized ( this.sortedServices ) |
| { |
| sortedServices.put(reference, srv); |
| configurationManager.setCoordinator(sortedServices.get(sortedServices.lastKey())); |
| } |
| } |
| return srv; |
| } |
| |
| @Override |
| public void modifiedService(final ServiceReference<Object> reference, final Object srv) { |
| synchronized ( this.sortedServices ) |
| { |
| // update the map, service ranking might have changed |
| sortedServices.remove(reference); |
| sortedServices.put(reference, srv); |
| configurationManager.setCoordinator(sortedServices.get(sortedServices.lastKey())); |
| } |
| } |
| |
| @Override |
| public void removedService(final ServiceReference<Object> reference, final Object service) { |
| synchronized ( this.sortedServices ) |
| { |
| sortedServices.remove(reference); |
| if ( sortedServices.isEmpty() ) |
| { |
| configurationManager.setCoordinator(null); |
| } |
| else |
| { |
| configurationManager.setCoordinator(sortedServices.get(sortedServices.lastKey())); |
| } |
| } |
| bundleContext.ungetService(reference); |
| } |
| }); |
| coordinatorTracker.open(); |
| } |
| |
| private void stopCoordinatorTracker() |
| { |
| if ( this.coordinatorTracker != null ) |
| { |
| this.coordinatorTracker.close(); |
| this.coordinatorTracker = null; |
| } |
| } |
| |
| public void unsetPersistenceManager() { |
| this.persistenceManager = null; |
| this.deactivate(); |
| } |
| |
| public void setPersistenceManager(final ExtPersistenceManager persistenceManager) { |
| this.persistenceManager = persistenceManager; |
| this.checkStart(); |
| } |
| |
| public void updatePluginsSet(final boolean value) { |
| if (this.pluginsAvailable.compareAndSet(!value, value)) { |
| if (!value) { |
| this.deactivate(); |
| } else { |
| this.checkStart(); |
| } |
| } |
| } |
| |
| public void checkStart() { |
| if (this.pluginsAvailable.get() && this.persistenceManager != null) { |
| this.activate(this.persistenceManager); |
| } |
| } |
| |
| public void updateRegisteredConfigurationPlugins(final String propValue) { |
| this.registeredConfigurationPlugins = propValue; |
| final ConfigurationManager localCM = this.configurationManager; |
| if (localCM != null) { |
| localCM.updateRegisteredConfigurationPlugins(propValue); |
| } |
| } |
| } |
| |