Felix Meschberger | e7f513f | 2012-07-02 14:00:02 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
| 19 | package org.apache.felix.cm.impl.helper; |
| 20 | |
| 21 | import java.util.ArrayList; |
| 22 | import java.util.Collection; |
| 23 | import java.util.Collections; |
| 24 | import java.util.Dictionary; |
| 25 | import java.util.List; |
| 26 | |
| 27 | import org.apache.felix.cm.impl.CaseInsensitiveDictionary; |
| 28 | import org.apache.felix.cm.impl.ConfigurationImpl; |
| 29 | import org.apache.felix.cm.impl.ConfigurationManager; |
| 30 | import org.apache.felix.cm.impl.RankingComparator; |
| 31 | import org.osgi.framework.Constants; |
| 32 | import org.osgi.framework.ServiceReference; |
| 33 | import org.osgi.service.log.LogService; |
| 34 | import org.osgi.util.tracker.ServiceTracker; |
| 35 | |
| 36 | /** |
| 37 | * The <code>BaseTracker</code> is the base class for tracking |
| 38 | * <code>ManagedService</code> and <code>ManagedServiceFactory</code> |
| 39 | * services. It maps their <code>ServiceRegistration</code> to the |
| 40 | * {@link ConfigurationMap} mapping their service PIDs to provided |
| 41 | * configuration. |
| 42 | */ |
| 43 | public abstract class BaseTracker<S> extends ServiceTracker<S, ConfigurationMap> |
| 44 | { |
| 45 | protected final ConfigurationManager cm; |
| 46 | |
| 47 | |
| 48 | protected BaseTracker( ConfigurationManager cm, Class<S> type ) |
| 49 | { |
| 50 | super( cm.getBundleContext(), type.getName(), null ); |
| 51 | this.cm = cm; |
| 52 | open(); |
| 53 | } |
| 54 | |
| 55 | |
| 56 | public ConfigurationMap addingService( ServiceReference<S> reference ) |
| 57 | { |
| 58 | final String[] pids = getServicePid( reference ); |
| 59 | configure( reference, pids ); |
| 60 | return new ConfigurationMap( pids ); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | @Override |
| 65 | public void modifiedService( ServiceReference<S> reference, ConfigurationMap service ) |
| 66 | { |
| 67 | String[] pids = getServicePid( reference ); |
| 68 | if ( service.isDifferentPids( pids ) ) |
| 69 | { |
| 70 | configure( reference, pids ); |
| 71 | service.setConfiguredPids( pids ); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | |
| 76 | // public void removedService( ServiceReference<ManagedServiceFactory> reference, |
| 77 | // ServiceHolder<ManagedServiceFactory> holder ) |
| 78 | // { |
| 79 | // // nothing really to do |
| 80 | // } |
| 81 | |
| 82 | |
| 83 | // cm.configure( pids, reference, msf); |
| 84 | protected void configure( ServiceReference<S> reference, String[] pids ) |
| 85 | { |
| 86 | if ( pids != null ) |
| 87 | { |
| 88 | S service = getRealService( reference ); |
| 89 | if ( service != null ) |
| 90 | { |
| 91 | try |
| 92 | { |
| 93 | if ( this.cm.isLogEnabled( LogService.LOG_DEBUG ) ) |
| 94 | { |
| 95 | this.cm.log( LogService.LOG_DEBUG, "configure(ManagedService {0})", new Object[] |
| 96 | { ConfigurationManager.toString( reference ) } ); |
| 97 | } |
| 98 | |
| 99 | for ( int i = 0; i < pids.length; i++ ) |
| 100 | { |
| 101 | this.cm.configure( pids[i], reference, service, isFactory() ); |
| 102 | } |
| 103 | } |
| 104 | finally |
| 105 | { |
| 106 | ungetRealService( reference ); |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | |
| 113 | public final List<ServiceReference<S>> getServices( final TargetedPID pid ) |
| 114 | { |
| 115 | ServiceReference<S>[] refs = this.getServiceReferences(); |
| 116 | if ( refs != null ) |
| 117 | { |
| 118 | ArrayList<ServiceReference<S>> result = new ArrayList<ServiceReference<S>>( refs.length ); |
| 119 | for ( ServiceReference<S> ref : refs ) |
| 120 | { |
| 121 | if ( pid.matchesTarget( ref ) ) |
| 122 | { |
| 123 | ConfigurationMap map = this.getService( ref ); |
| 124 | if ( map != null && map.accepts( pid.getServicePid() ) ) |
| 125 | { |
| 126 | result.add( ref ); |
| 127 | } |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | if ( result.size() > 1 ) |
| 132 | { |
| 133 | Collections.sort( result, RankingComparator.SRV_RANKING ); |
| 134 | } |
| 135 | |
| 136 | return result; |
| 137 | } |
| 138 | |
| 139 | return Collections.emptyList(); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | protected abstract boolean isFactory(); |
| 144 | |
| 145 | // Updates |
Felix Meschberger | accd901 | 2012-07-02 15:18:08 +0000 | [diff] [blame^] | 146 | public abstract void provideConfiguration( ServiceReference<S> service, ConfigurationImpl config, Dictionary<String, ?> properties ); |
Felix Meschberger | e7f513f | 2012-07-02 14:00:02 +0000 | [diff] [blame] | 147 | |
| 148 | |
Felix Meschberger | accd901 | 2012-07-02 15:18:08 +0000 | [diff] [blame^] | 149 | public abstract void removeConfiguration( ServiceReference<S> service, ConfigurationImpl config ); |
Felix Meschberger | e7f513f | 2012-07-02 14:00:02 +0000 | [diff] [blame] | 150 | |
| 151 | |
| 152 | protected final S getRealService( ServiceReference<S> reference ) |
| 153 | { |
| 154 | return this.context.getService( reference ); |
| 155 | } |
| 156 | |
| 157 | |
| 158 | protected final void ungetRealService( ServiceReference<S> reference ) |
| 159 | { |
| 160 | this.context.ungetService( reference ); |
| 161 | } |
| 162 | |
| 163 | protected final Dictionary getProperties( Dictionary<String, ?> rawProperties, String targetPid, ServiceReference service ) |
| 164 | { |
| 165 | Dictionary props = new CaseInsensitiveDictionary( rawProperties ); |
| 166 | this.cm.callPlugins( props, targetPid, service, null /* config */ ); |
| 167 | return props; |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Returns the <code>service.pid</code> property of the service reference as |
| 172 | * an array of strings or <code>null</code> if the service reference does |
| 173 | * not have a service PID property. |
| 174 | * <p> |
| 175 | * The service.pid property may be a single string, in which case a single |
| 176 | * element array is returned. If the property is an array of string, this |
| 177 | * array is returned. If the property is a collection it is assumed to be a |
| 178 | * collection of strings and the collection is converted to an array to be |
| 179 | * returned. Otherwise (also if the property is not set) <code>null</code> |
| 180 | * is returned. |
| 181 | * |
| 182 | * @throws NullPointerException |
| 183 | * if reference is <code>null</code> |
| 184 | * @throws ArrayStoreException |
| 185 | * if the service pid is a collection and not all elements are |
| 186 | * strings. |
| 187 | */ |
| 188 | private static String[] getServicePid( ServiceReference reference ) |
| 189 | { |
| 190 | Object pidObj = reference.getProperty( Constants.SERVICE_PID ); |
| 191 | if ( pidObj instanceof String ) |
| 192 | { |
| 193 | return new String[] |
| 194 | { ( String ) pidObj }; |
| 195 | } |
| 196 | else if ( pidObj instanceof String[] ) |
| 197 | { |
| 198 | return ( String[] ) pidObj; |
| 199 | } |
| 200 | else if ( pidObj instanceof Collection ) |
| 201 | { |
| 202 | Collection pidCollection = ( Collection ) pidObj; |
| 203 | return ( String[] ) pidCollection.toArray( new String[pidCollection.size()] ); |
| 204 | } |
| 205 | |
| 206 | return null; |
| 207 | } |
| 208 | |
| 209 | } |