| /** |
| * 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.servicemix.specs.locator; |
| |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleActivator; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleEvent; |
| import org.osgi.framework.SynchronousBundleListener; |
| |
| public class Activator implements BundleActivator, SynchronousBundleListener { |
| |
| private BundleContext bundleContext; |
| private ConcurrentMap<Long, Map<String, Callable<Class>>> factories = new ConcurrentHashMap<Long, Map<String, Callable<Class>>>(); |
| |
| public synchronized void start(BundleContext bundleContext) throws Exception { |
| this.bundleContext = bundleContext; |
| bundleContext.addBundleListener(this); |
| for (Bundle bundle : bundleContext.getBundles()) { |
| register(bundle); |
| } |
| } |
| |
| public synchronized void stop(BundleContext bundleContext) throws Exception { |
| while (!factories.isEmpty()) { |
| unregister(factories.keySet().iterator().next()); |
| } |
| this.bundleContext = null; |
| } |
| |
| public void bundleChanged(BundleEvent event) { |
| if (event.getType() == BundleEvent.RESOLVED) { |
| register(event.getBundle()); |
| } else if (event.getType() == BundleEvent.UNRESOLVED) { |
| unregister(event.getBundle().getBundleId()); |
| } |
| } |
| |
| protected void register(final Bundle bundle) { |
| Map<String, Callable<Class>> map = factories.get(bundle.getBundleId()); |
| Enumeration e = bundle.findEntries("META-INF/services/", "*", false); |
| if (e != null) { |
| while (e.hasMoreElements()) { |
| final URL u = (URL) e.nextElement(); |
| final String url = u.toString(); |
| if (url.endsWith("/")) { |
| continue; |
| } |
| final String factoryId = url.substring(url.lastIndexOf("/") + 1); |
| if (map == null) { |
| map = new HashMap<String, Callable<Class>>(); |
| factories.put(bundle.getBundleId(), map); |
| } |
| map.put(factoryId, new Callable<Class>() { |
| public Class call() throws Exception { |
| BufferedReader br = new BufferedReader(new InputStreamReader(u.openStream(), "UTF-8")); |
| String factoryClassName = br.readLine(); |
| br.close(); |
| return bundle.loadClass(factoryClassName); |
| } |
| }); |
| } |
| } |
| if (map != null) { |
| for (Map.Entry<String, Callable<Class>> entry : map.entrySet()) { |
| OsgiLocator.register(entry.getKey(), entry.getValue()); |
| } |
| } |
| } |
| |
| protected void unregister(long bundleId) { |
| Map<String, Callable<Class>> map = factories.remove(bundleId); |
| if (map != null) { |
| for (Map.Entry<String, Callable<Class>> entry : map.entrySet()) { |
| OsgiLocator.unregister(entry.getKey(), entry.getValue()); |
| } |
| } |
| } |
| } |