| /* |
| * 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.util.Arrays; |
| |
| import org.apache.felix.cm.PersistenceManager; |
| import org.apache.felix.cm.impl.persistence.ExtPersistenceManager; |
| import org.apache.felix.cm.impl.persistence.PersistenceManagerTracker; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleException; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceFactory; |
| import org.osgi.service.log.LogService; |
| |
| /** |
| * The dependency tracker keeps track of all required dependencies (services) |
| * for the configuration admin and only activates the admin if everything is |
| * satisfied. |
| */ |
| public class DependencyTracker |
| { |
| /** The persistence manager tracker (optional) */ |
| private final PersistenceManagerTracker persistenceManagerTracker; |
| |
| /** The configuration plugin tracker (optional) */ |
| private final RequiredConfigurationPluginTracker configurationPluginTracker; |
| |
| private final ActivatorWorkerQueue workerQueue; |
| |
| private final ConfigurationAdminStarter starter; |
| |
| public DependencyTracker(final BundleContext bundleContext, |
| final ServiceFactory<PersistenceManager> defaultFactory, |
| final String pmName, final String[] pluginNames) |
| throws BundleException, InvalidSyntaxException |
| { |
| this.starter = new ConfigurationAdminStarter(bundleContext); |
| |
| final boolean useQueue = pmName != null || pluginNames != null; |
| if (useQueue) { |
| this.workerQueue = new ActivatorWorkerQueue(); |
| } else { |
| this.workerQueue = null; |
| } |
| if (pluginNames != null) { |
| Log.logger.log(LogService.LOG_DEBUG, "Requiring configuration plugins {0}", |
| new Object[] { Arrays.toString(pluginNames) }); |
| this.configurationPluginTracker = new RequiredConfigurationPluginTracker(bundleContext, workerQueue, |
| starter, pluginNames); |
| } else { |
| this.configurationPluginTracker = null; |
| if (useQueue) { |
| starter.updatePluginsSet(true); |
| } |
| } |
| |
| if ( pmName != null ) |
| { |
| Log.logger.log(LogService.LOG_DEBUG, "Using persistence manager {0}", new Object[] {pmName}); |
| this.persistenceManagerTracker = new PersistenceManagerTracker(bundleContext, workerQueue, starter, pmName); |
| } |
| else |
| { |
| this.persistenceManagerTracker = null; |
| |
| Log.logger.log(LogService.LOG_DEBUG, "Using default persistence manager", (Object[])null); |
| PersistenceManager defaultPM = null; |
| try { |
| defaultPM = defaultFactory.getService(null, null); |
| } catch (final IllegalArgumentException iae) { |
| Log.logger.log(LogService.LOG_ERROR, "Cannot create the FilePersistenceManager", iae); |
| } |
| if (defaultPM == null) { |
| throw new BundleException("Unable to register default persistence manager."); |
| } |
| |
| final ExtPersistenceManager epm = PersistenceManagerTracker.createPersistenceManagerProxy(defaultPM); |
| if (useQueue) { |
| starter.setPersistenceManager(epm); |
| } else { |
| this.starter.activate(epm); |
| } |
| } |
| } |
| |
| /** |
| * Stop the tracker, stop configuration admin |
| */ |
| public void stop( ) |
| { |
| if (this.workerQueue != null) { |
| this.workerQueue.stop(); |
| } |
| this.starter.deactivate(); |
| if ( this.persistenceManagerTracker != null ) |
| { |
| this.persistenceManagerTracker.stop(); |
| } |
| if (this.configurationPluginTracker != null) |
| { |
| this.configurationPluginTracker.stop(); |
| } |
| } |
| } |
| |