| /** |
| * 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.Arrays; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.Properties; |
| |
| import org.apache.aries.blueprint.ext.PropertyPlaceholderExt; |
| import org.apache.aries.blueprint.services.ExtendedBlueprintContainer; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.cm.ConfigurationAdmin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * TODO: javadoc |
| * |
| * @version $Rev$, $Date$ |
| */ |
| public class CmPropertyPlaceholder extends PropertyPlaceholderExt implements ManagedObject { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(CmPropertyPlaceholder.class); |
| |
| private ExtendedBlueprintContainer blueprintContainer; |
| private ConfigurationAdmin configAdmin; |
| private String persistentId; |
| private String updateStrategy; |
| private ManagedObjectManager managedObjectManager; |
| private Dictionary<String, Object> properties; |
| private boolean initialized; |
| |
| public ExtendedBlueprintContainer getBlueprintContainer() { |
| return blueprintContainer; |
| } |
| |
| public void setBlueprintContainer(ExtendedBlueprintContainer blueprintContainer) { |
| this.blueprintContainer = blueprintContainer; |
| } |
| |
| public ConfigurationAdmin getConfigAdmin() { |
| return configAdmin; |
| } |
| |
| public void setConfigAdmin(ConfigurationAdmin configAdmin) { |
| this.configAdmin = configAdmin; |
| } |
| |
| public String getPersistentId() { |
| return persistentId; |
| } |
| |
| public void setPersistentId(String persistentId) { |
| this.persistentId = persistentId; |
| } |
| |
| public String getUpdateStrategy() { |
| return updateStrategy; |
| } |
| |
| public void setUpdateStrategy(String updateStrategy) { |
| this.updateStrategy = updateStrategy; |
| } |
| |
| public ManagedObjectManager getManagedObjectManager() { |
| return managedObjectManager; |
| } |
| |
| public void setManagedObjectManager(ManagedObjectManager managedObjectManager) { |
| this.managedObjectManager = managedObjectManager; |
| } |
| |
| public void init() throws Exception { |
| LOGGER.debug("Initializing CmPropertyPlaceholder"); |
| Properties props = new Properties(); |
| props.put(Constants.SERVICE_PID, persistentId); |
| Bundle bundle = blueprintContainer.getBundleContext().getBundle(); |
| props.put(Constants.BUNDLE_SYMBOLICNAME, bundle.getSymbolicName()); |
| props.put(Constants.BUNDLE_VERSION, bundle.getHeaders().get(Constants.BUNDLE_VERSION)); |
| managedObjectManager.register(this, props); |
| } |
| |
| public void destroy() { |
| LOGGER.debug("Destroying CmPropertyPlaceholder"); |
| managedObjectManager.unregister(this); |
| } |
| |
| protected Object getProperty(String val) { |
| LOGGER.debug("Retrieving property value {} from configuration with pid {}", val, persistentId); |
| Object v = null; |
| if (properties != null) { |
| v = properties.get(val); |
| if (v != null) { |
| LOGGER.debug("Found property value {}", v); |
| } else { |
| LOGGER.debug("Property not found in configuration"); |
| } |
| } |
| if (v == null) { |
| v = super.getProperty(val); |
| } |
| return v; |
| } |
| |
| public Bundle getBundle() { |
| return blueprintContainer.getBundleContext().getBundle(); |
| } |
| |
| public void updated(Dictionary props) { |
| if (!initialized) { |
| properties = props; |
| initialized = true; |
| return; |
| } |
| if ("reload".equalsIgnoreCase(updateStrategy) && !equals(properties, props)) { |
| LOGGER.debug("Configuration updated for pid={}", persistentId); |
| // Run in a separate thread to avoid re-entrance |
| new Thread() { |
| public void run() { |
| blueprintContainer.reload(); |
| } |
| }.start(); |
| } |
| } |
| |
| private <T, U> boolean equals(Dictionary<T, U> d1, Dictionary<T, U> d2) { |
| if (d1 == null || d1.isEmpty()) { |
| return d2 == null || d2.isEmpty(); |
| } else if (d2 == null || d1.size() != d2.size()) { |
| return false; |
| } else { |
| for (Enumeration<T> e = d1.keys(); e.hasMoreElements();) { |
| T k = e.nextElement(); |
| U v1 = d1.get(k); |
| U v2 = d2.get(k); |
| if (v1 == null) { |
| if (v2 != null) { |
| return false; |
| } |
| } else if (v1 instanceof Object[] && v2 instanceof Object[]) { |
| if (!Arrays.deepEquals((Object[]) v1, (Object[]) v2)) { |
| return false; |
| } |
| } else if (!v1.equals(v2)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |
| |
| } |