| /* |
| * 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.helper; |
| |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Dictionary; |
| import java.util.Hashtable; |
| |
| import org.apache.felix.cm.impl.ConfigurationManager; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.cm.ConfigurationException; |
| import org.osgi.service.cm.ManagedService; |
| |
| |
| public class ManagedServiceTracker extends BaseTracker<ManagedService> |
| { |
| |
| private static final Dictionary<String, ?> INITIAL_MARKER = new Hashtable<String, Object>( 0 ); |
| |
| |
| public ManagedServiceTracker( ConfigurationManager cm ) |
| { |
| super( cm, false ); |
| } |
| |
| |
| @Override |
| protected ConfigurationMap<?> createConfigurationMap( String[] pids ) |
| { |
| return new ManagedServiceConfigurationMap( pids ); |
| } |
| |
| |
| @Override |
| public String getServicePid( ServiceReference<ManagedService> service, TargetedPID pid ) |
| { |
| final ConfigurationMap configs = this.getService( service ); |
| if ( configs != null ) |
| { |
| return configs.getKeyPid( pid ); |
| } |
| |
| // this service is not handled... |
| return null; |
| } |
| |
| |
| /** |
| * Provides the given configuration to the managed service. |
| * <p> |
| * Depending on targeted PIDs this configuration may not actually be |
| * provided if the service already has more strictly binding |
| * configuration from a targeted configuration bound. |
| * <p> |
| * If the revision is a negative value, the provided configuration |
| * is assigned to the ManagedService in any case without further |
| * checks. This allows a replacement configuration for a deleted |
| * or invisible configuration to be assigned without first removing |
| * the deleted or invisible configuration. |
| */ |
| @Override |
| public void provideConfiguration( ServiceReference<ManagedService> service, TargetedPID configPid, |
| TargetedPID factoryPid, Dictionary<String, ?> properties, long revision, ConfigurationMap<?> configs ) |
| { |
| Dictionary<String, ?> supplied = ( properties == null ) ? INITIAL_MARKER : properties; |
| updateService( service, configPid, supplied, revision, configs ); |
| } |
| |
| |
| @Override |
| public void removeConfiguration( ServiceReference<ManagedService> service, TargetedPID configPid, |
| TargetedPID factoryPid ) |
| { |
| updateService( service, configPid, null, -1, null ); |
| } |
| |
| |
| private void updateService( ServiceReference<ManagedService> service, final TargetedPID configPid, |
| Dictionary<String, ?> properties, long revision, ConfigurationMap<?> configs) |
| { |
| // Get the ManagedService and terminate here if already |
| // unregistered from the framework concurrently |
| final ManagedService srv = this.getRealService( service ); |
| if (srv == null) { |
| return; |
| } |
| |
| // Get the Configuration-to-PID map from the parameter or from |
| // the service tracker. If not available, the service tracker |
| // already unregistered this service concurrently |
| if ( configs == null ) |
| { |
| configs = this.getService( service ); |
| if ( configs == null ) |
| { |
| return; |
| } |
| } |
| |
| // Both the ManagedService to update and the Configuration-to-PID |
| // are available, so the service can be updated with the |
| // configuration (which may be null) |
| |
| boolean doUpdate = false; |
| if ( properties == null ) |
| { |
| doUpdate = configs.removeConfiguration( configPid, null ); |
| } |
| else if ( properties == INITIAL_MARKER ) |
| { |
| // initial call to ManagedService may supply null properties |
| properties = null; |
| revision = -1; |
| doUpdate = true; |
| } |
| else if ( revision < 0 || configs.shallTake( configPid, null, revision ) ) |
| { |
| // run the plugins and cause the update |
| properties = getProperties( properties, service, configPid.toString(), null ); |
| doUpdate = true; |
| revision = Math.abs( revision ); |
| } |
| else |
| { |
| // new configuration is not a better match, don't update |
| doUpdate = false; |
| } |
| |
| if ( doUpdate ) |
| { |
| try |
| { |
| updated( service, srv, properties ); |
| configs.record( configPid, null, revision ); |
| } |
| catch ( Throwable t ) |
| { |
| this.handleCallBackError( t, service, configPid ); |
| } |
| finally |
| { |
| this.ungetRealService( service ); |
| } |
| } |
| } |
| |
| |
| private void updated( final ServiceReference<ManagedService> reference, final ManagedService service, final Dictionary properties) throws ConfigurationException |
| { |
| if ( System.getSecurityManager() != null ) |
| { |
| try |
| { |
| AccessController.doPrivileged( new PrivilegedExceptionAction() |
| { |
| public Object run() throws ConfigurationException |
| { |
| service.updated( properties ); |
| return null; |
| } |
| }, getAccessControlContext( reference.getBundle() ) ); |
| } |
| catch ( PrivilegedActionException e ) |
| { |
| throw ( ConfigurationException ) e.getException(); |
| } |
| } |
| else |
| { |
| service.updated( properties ); |
| } |
| } |
| } |