| /* |
| * 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.http.base.internal.whiteboard.tracker; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.jetbrains.annotations.NotNull; |
| |
| import org.apache.felix.http.base.internal.runtime.ServletContextHelperInfo; |
| import org.apache.felix.http.base.internal.whiteboard.WhiteboardManager; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.http.context.ServletContextHelper; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| /** |
| * Tracks all {@link ServletContextHelper} services. |
| */ |
| public final class ServletContextHelperTracker extends ServiceTracker<ServletContextHelper, ServiceReference<ServletContextHelper>> |
| { |
| private final WhiteboardManager contextManager; |
| |
| /** Map containing all info objects reported from the trackers. */ |
| private final Map<Long, ServletContextHelperInfo> allInfos = new ConcurrentHashMap<Long, ServletContextHelperInfo>(); |
| |
| private static org.osgi.framework.Filter createFilter(final BundleContext btx) |
| { |
| try |
| { |
| return btx.createFilter(String.format("(objectClass=%s)", |
| ServletContextHelper.class.getName())); |
| } |
| catch ( final InvalidSyntaxException ise) |
| { |
| // we can safely ignore it as the above filter is a constant |
| } |
| return null; // we never get here - and if we get an NPE which is fine |
| } |
| |
| public ServletContextHelperTracker(@NotNull final BundleContext context, @NotNull final WhiteboardManager manager) |
| { |
| super(context, createFilter(context), null); |
| this.contextManager = manager; |
| } |
| |
| @Override |
| public void close() { |
| super.close(); |
| this.allInfos.clear(); |
| } |
| |
| @Override |
| public final ServiceReference<ServletContextHelper> addingService(@NotNull final ServiceReference<ServletContextHelper> ref) |
| { |
| this.added(ref); |
| return ref; |
| } |
| |
| @Override |
| public final void modifiedService(@NotNull final ServiceReference<ServletContextHelper> ref, @NotNull final ServiceReference<ServletContextHelper> service) |
| { |
| this.removed(ref); |
| this.added(ref); |
| } |
| |
| @Override |
| public final void removedService(@NotNull final ServiceReference<ServletContextHelper> ref, @NotNull final ServiceReference<ServletContextHelper> service) |
| { |
| this.removed(ref); |
| } |
| |
| private void added(@NotNull final ServiceReference<ServletContextHelper> ref) |
| { |
| final ServletContextHelperInfo info = new ServletContextHelperInfo(ref); |
| if ( this.contextManager.addContextHelper(info) ) |
| { |
| this.allInfos.put((Long)ref.getProperty(Constants.SERVICE_ID), info); |
| } |
| } |
| |
| private void removed(@NotNull final ServiceReference<ServletContextHelper> ref) |
| { |
| final ServletContextHelperInfo info = this.allInfos.get(ref.getProperty(Constants.SERVICE_ID)); |
| if ( info != null ) |
| { |
| this.contextManager.removeContextHelper(info); |
| } |
| } |
| } |