| /* |
| * 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; |
| |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.felix.cm.PersistenceManager; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| |
| |
| class DynamicBindings |
| { |
| |
| static final String BINDINGS_FILE_NAME = "org_apache_felix_cm_impl_DynamicBindings"; |
| |
| private final PersistenceManager persistenceManager; |
| |
| private final Dictionary<String, String> bindings; |
| |
| @SuppressWarnings("unchecked") |
| DynamicBindings( BundleContext bundleContext, PersistenceManager persistenceManager ) throws IOException |
| { |
| this.persistenceManager = persistenceManager; |
| |
| if ( persistenceManager.exists( BINDINGS_FILE_NAME ) ) |
| { |
| this.bindings = persistenceManager.load( BINDINGS_FILE_NAME ); |
| |
| // get locations of installed bundles to validate the bindings |
| final Set<String> locations = new HashSet<>(); |
| final Bundle[] bundles = bundleContext.getBundles(); |
| for ( int i = 0; i < bundles.length; i++ ) |
| { |
| locations.add( Activator.getLocation(bundles[i]) ); |
| } |
| |
| // collect pids whose location is not installed any more |
| List<String> removedKeys = new ArrayList<>(); |
| for (Enumeration<String> ke = bindings.keys(); ke.hasMoreElements();) |
| { |
| final String pid = ke.nextElement(); |
| final String location = bindings.get( pid ); |
| if ( !locations.contains( location ) ) |
| { |
| removedKeys.add( pid ); |
| } |
| } |
| |
| // if some bindings had to be removed, store the mapping again |
| if ( removedKeys.size() > 0 ) |
| { |
| // remove invalid mappings |
| for (Iterator<String> rki = removedKeys.iterator(); rki.hasNext();) |
| { |
| bindings.remove( rki.next() ); |
| } |
| |
| // store the modified map |
| persistenceManager.store( BINDINGS_FILE_NAME, bindings ); |
| } |
| } |
| else |
| { |
| this.bindings = new Hashtable<>(); |
| } |
| |
| } |
| |
| |
| String getLocation( final String pid ) |
| { |
| synchronized ( this ) |
| { |
| return this.bindings.get( pid ); |
| } |
| } |
| |
| |
| void putLocation( final String pid, final String location ) throws IOException |
| { |
| synchronized ( this ) |
| { |
| if ( location == null ) |
| { |
| this.bindings.remove( pid ); |
| } |
| else |
| { |
| this.bindings.put( pid, location ); |
| } |
| |
| if (this.bindings.isEmpty()) { |
| this.persistenceManager.delete(BINDINGS_FILE_NAME); |
| } else { |
| this.persistenceManager.store(BINDINGS_FILE_NAME, bindings); |
| } |
| } |
| } |
| } |