| /** |
| * 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.aries.blueprint.compendium.cm; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Properties; |
| |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.service.cm.ConfigurationException; |
| import org.osgi.service.cm.ManagedService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Since persistence id can only be associated with one ManagedService in a bundle |
| * this class ensures only one ManagedService is registered per persistence id. |
| */ |
| public class ManagedObjectManager { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(ManagedObjectManager.class); |
| |
| private HashMap<String, ConfigurationWatcher> map = new HashMap<String, ConfigurationWatcher>(); |
| |
| public synchronized void register(ManagedObject cm, Properties props) { |
| String key = cm.getPersistentId(); |
| ConfigurationWatcher reg = map.get(key); |
| if (reg == null) { |
| reg = new ConfigurationWatcher(); |
| ServiceRegistration registration = cm.getBundle().getBundleContext().registerService(ManagedService.class.getName(), reg, props); |
| reg.setRegistration(registration); |
| map.put(key, reg); |
| } |
| reg.add(cm); |
| } |
| |
| public synchronized void unregister(ManagedObject cm) { |
| String key = cm.getPersistentId(); |
| ConfigurationWatcher reg = map.get(key); |
| if (reg != null) { |
| reg.remove(cm); |
| if (reg.isEmpty()) { |
| map.remove(key); |
| reg.getRegistration().unregister(); |
| } |
| } |
| } |
| |
| private static class ConfigurationWatcher implements ManagedService { |
| |
| private ServiceRegistration registration; |
| private List<ManagedObject> list = Collections.synchronizedList(new ArrayList<ManagedObject>()); |
| |
| public ConfigurationWatcher() { |
| } |
| |
| public void updated(Dictionary props) throws ConfigurationException { |
| synchronized (list) { |
| for (ManagedObject cm : list) { |
| cm.updated(props); |
| } |
| } |
| } |
| |
| private void setRegistration(ServiceRegistration registration) { |
| this.registration = registration; |
| } |
| |
| private ServiceRegistration getRegistration() { |
| return registration; |
| } |
| |
| private void add(ManagedObject cm) { |
| list.add(cm); |
| } |
| |
| private void remove(ManagedObject cm) { |
| list.remove(cm); |
| } |
| |
| private boolean isEmpty() { |
| return list.isEmpty(); |
| } |
| } |
| |
| } |