| /* |
| * 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.persistence; |
| |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.felix.cm.NotCachablePersistenceManager; |
| import org.apache.felix.cm.impl.CaseInsensitiveDictionary; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.cm.ConfigurationAdmin; |
| |
| |
| /** |
| * The <code>MemoryPersistenceManager</code> holds all configurations in memory. |
| */ |
| public class MemoryPersistenceManager implements NotCachablePersistenceManager |
| { |
| |
| /** Cached dictionaries */ |
| private final Map<String, CaseInsensitiveDictionary> cache = new HashMap<>(); |
| |
| /** Factory configuration cache. */ |
| private final Map<String, Set<String>> factoryConfigCache = new HashMap<>(); |
| |
| @Override |
| public void delete( final String pid ) throws IOException |
| { |
| final Dictionary props = cache.remove(pid); |
| if (props != null) |
| { |
| final String factoryPid = (String) props.get(ConfigurationAdmin.SERVICE_FACTORYPID); |
| if (factoryPid != null) |
| { |
| final Set<String> factoryPids = this.factoryConfigCache.get(factoryPid); |
| if (factoryPids != null) |
| { |
| factoryPids.remove(pid); |
| if (factoryPids.isEmpty()) |
| { |
| this.factoryConfigCache.remove(factoryPid); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public boolean exists( final String pid ) |
| { |
| return cache.containsKey(pid); |
| } |
| |
| @Override |
| public Enumeration getDictionaries() throws IOException |
| { |
| // Deep copy the configuration to avoid any threading issue |
| final List<Dictionary> configs = new ArrayList<>(); |
| for (final Dictionary d : cache.values()) { |
| if (d.get(Constants.SERVICE_PID) != null) { |
| configs.add(new CaseInsensitiveDictionary(d)); |
| } |
| } |
| return Collections.enumeration(configs); |
| } |
| |
| private final CaseInsensitiveDictionary cache(final Dictionary props) |
| { |
| final String pid = (String) props.get( Constants.SERVICE_PID ); |
| CaseInsensitiveDictionary dict = null; |
| if ( pid != null ) |
| { |
| dict = cache.get(pid); |
| if ( dict == null ) |
| { |
| dict = new CaseInsensitiveDictionary(props); |
| cache.put( pid, dict ); |
| final String factoryPid = (String)props.get(ConfigurationAdmin.SERVICE_FACTORYPID); |
| if ( factoryPid != null ) |
| { |
| Set<String> factoryPids = this.factoryConfigCache.get(factoryPid); |
| if ( factoryPids == null ) |
| { |
| factoryPids = new HashSet<>(); |
| this.factoryConfigCache.put(factoryPid, factoryPids); |
| } |
| factoryPids.add(pid); |
| } |
| } |
| } |
| return dict; |
| } |
| |
| @Override |
| public Dictionary load( final String pid ) throws IOException |
| { |
| CaseInsensitiveDictionary loaded = cache.get(pid); |
| return loaded == null ? null : new CaseInsensitiveDictionary(loaded); |
| } |
| |
| @Override |
| public void store( final String pid, final Dictionary properties ) throws IOException |
| { |
| this.cache.remove(pid); |
| this.cache(properties); |
| } |
| } |