| /* |
| * 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.rsa.topologymanager.importer.local; |
| |
| import java.util.Collection; |
| |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.hooks.service.ListenerHook; |
| import org.osgi.service.remoteserviceadmin.RemoteConstants; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Listens for service listeners and informs ServiceInterestListener about added and removed interest |
| * in services |
| */ |
| public class ListenerHookImpl implements ListenerHook { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ListenerHookImpl.class); |
| |
| private final BundleContext bctx; |
| private final ServiceInterestListener serviceInterestListener; |
| private final String frameworkUUID; |
| |
| public ListenerHookImpl(BundleContext bc, ServiceInterestListener serviceInterestListener) { |
| this.bctx = bc; |
| this.frameworkUUID = bctx.getProperty(Constants.FRAMEWORK_UUID); |
| this.serviceInterestListener = serviceInterestListener; |
| } |
| |
| @Override |
| public void added(Collection<ListenerInfo> listeners) { |
| LOG.debug("added listeners {}", listeners); |
| for (ListenerInfo listenerInfo : listeners) { |
| LOG.debug("Filter {}", listenerInfo.getFilter()); |
| |
| String className = FilterHelper.getObjectClass(listenerInfo.getFilter()); |
| |
| if (listenerInfo.getBundleContext().equals(bctx)) { |
| LOG.debug("ListenerHookImpl: skipping request from myself"); |
| continue; |
| } |
| |
| if (listenerInfo.getFilter() == null) { |
| LOG.debug("skipping empty filter"); |
| continue; |
| } |
| |
| if (FilterHelper.isClassExcluded(className)) { |
| LOG.debug("Skipping import request for excluded class [{}]", className); |
| continue; |
| } |
| String exFilter = extendFilter(listenerInfo.getFilter()); |
| serviceInterestListener.addServiceInterest(exFilter); |
| } |
| } |
| |
| @Override |
| public void removed(Collection<ListenerInfo> listeners) { |
| LOG.debug("removed listeners {}", listeners); |
| |
| for (ListenerInfo listenerInfo : listeners) { |
| LOG.debug("Filter {}", listenerInfo.getFilter()); |
| |
| // TODO: determine if service was handled? |
| String exFilter = extendFilter(listenerInfo.getFilter()); |
| serviceInterestListener.removeServiceInterest(exFilter); |
| } |
| } |
| |
| String extendFilter(String filter) { |
| return "(&" + filter + "(!(" + RemoteConstants.ENDPOINT_FRAMEWORK_UUID + "=" + frameworkUUID + ")))"; |
| } |
| } |