| /** |
| * 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.cxf.bus.osgi; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.List; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.logging.Logger; |
| |
| import org.apache.cxf.Bus; |
| import org.apache.cxf.bus.extension.Extension; |
| import org.apache.cxf.bus.extension.ExtensionException; |
| import org.apache.cxf.bus.extension.ExtensionRegistry; |
| import org.apache.cxf.bus.extension.TextExtensionFragmentParser; |
| import org.apache.cxf.common.i18n.Message; |
| import org.apache.cxf.common.logging.LogUtils; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleEvent; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.framework.SynchronousBundleListener; |
| |
| public class CXFExtensionBundleListener implements SynchronousBundleListener { |
| private static final Logger LOG = LogUtils.getL7dLogger(CXFActivator.class); |
| private long id; |
| private ConcurrentMap<Long, List<OSGiExtension>> extensions |
| = new ConcurrentHashMap<Long, List<OSGiExtension>>(16, 0.75f, 4); |
| |
| public CXFExtensionBundleListener(long bundleId) { |
| this.id = bundleId; |
| } |
| |
| public void registerExistingBundles(BundleContext context) throws IOException { |
| for (Bundle bundle : context.getBundles()) { |
| if ((bundle.getState() == Bundle.RESOLVED |
| || bundle.getState() == Bundle.STARTING |
| || bundle.getState() == Bundle.ACTIVE |
| || bundle.getState() == Bundle.STOPPING) |
| && bundle.getBundleId() != context.getBundle().getBundleId()) { |
| register(bundle); |
| } |
| } |
| } |
| |
| /** {@inheritDoc}*/ |
| public void bundleChanged(BundleEvent event) { |
| if (event.getType() == BundleEvent.RESOLVED && id != event.getBundle().getBundleId()) { |
| register(event.getBundle()); |
| } else if (event.getType() == BundleEvent.UNRESOLVED || event.getType() == BundleEvent.UNINSTALLED) { |
| unregister(event.getBundle().getBundleId()); |
| } |
| } |
| |
| protected void register(final Bundle bundle) { |
| Enumeration<?> e = bundle.findEntries("META-INF/cxf/", "bus-extensions.txt", false); |
| while (e != null && e.hasMoreElements()) { |
| List<Extension> orig = new TextExtensionFragmentParser(null).getExtensions((URL)e.nextElement()); |
| addExtensions(bundle, orig); |
| } |
| } |
| |
| private boolean addExtensions(final Bundle bundle, List<Extension> orig) { |
| if (orig.isEmpty()) { |
| return false; |
| } |
| |
| List<String> names = new ArrayList<String>(orig.size()); |
| for (Extension ext : orig) { |
| names.add(ext.getName()); |
| } |
| LOG.info("Adding the extensions from bundle " + bundle.getSymbolicName() |
| + " (" + bundle.getBundleId() + ") " + names); |
| List<OSGiExtension> list = extensions.get(bundle.getBundleId()); |
| if (list == null) { |
| list = new CopyOnWriteArrayList<OSGiExtension>(); |
| List<OSGiExtension> preList = extensions.putIfAbsent(bundle.getBundleId(), list); |
| if (preList != null) { |
| list = preList; |
| } |
| } |
| for (Extension ext : orig) { |
| list.add(new OSGiExtension(ext, bundle)); |
| } |
| ExtensionRegistry.addExtensions(list); |
| return !list.isEmpty(); |
| } |
| |
| protected void unregister(final long bundleId) { |
| List<OSGiExtension> list = extensions.remove(bundleId); |
| if (list != null) { |
| LOG.info("Removing the extensions for bundle " + bundleId); |
| ExtensionRegistry.removeExtensions(list); |
| } |
| } |
| |
| public void shutdown() { |
| while (!extensions.isEmpty()) { |
| unregister(extensions.keySet().iterator().next()); |
| } |
| } |
| |
| public class OSGiExtension extends Extension { |
| final Bundle bundle; |
| Object serviceObject; |
| public OSGiExtension(Extension e, Bundle b) { |
| super(e); |
| bundle = b; |
| } |
| |
| public void setServiceObject(Object o) { |
| serviceObject = o; |
| obj = o; |
| } |
| public Object load(ClassLoader cl, Bus b) { |
| if (interfaceName == null && bundle.getBundleContext() != null) { |
| ServiceReference ref = bundle.getBundleContext().getServiceReference(className); |
| if (ref != null && ref.getBundle().getBundleId() == bundle.getBundleId()) { |
| Object o = bundle.getBundleContext().getService(ref); |
| serviceObject = o; |
| obj = o; |
| return obj; |
| } |
| } |
| return super.load(cl, b); |
| } |
| protected Class<?> tryClass(String name, ClassLoader cl) { |
| Class<?> c = null; |
| Throwable origExc = null; |
| try { |
| c = bundle.loadClass(className); |
| } catch (Throwable e) { |
| origExc = e; |
| } |
| if (c == null) { |
| try { |
| return super.tryClass(name, cl); |
| } catch (ExtensionException ee) { |
| if (origExc != null) { |
| throw new ExtensionException(new Message("PROBLEM_LOADING_EXTENSION_CLASS", |
| Extension.LOG, name), |
| origExc); |
| } else { |
| throw ee; |
| } |
| } |
| } |
| return c; |
| } |
| |
| public Extension cloneNoObject() { |
| OSGiExtension ext = new OSGiExtension(this, bundle); |
| ext.obj = serviceObject; |
| return ext; |
| } |
| |
| } |
| } |