| /* |
| * 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.sling.commons.classloader.impl; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceFactory; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.service.packageadmin.ExportedPackage; |
| import org.osgi.service.packageadmin.PackageAdmin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This is the service factory for the dynamic class loader manager. |
| */ |
| public class DynamicClassLoaderManagerFactory |
| implements ServiceFactory { |
| |
| /** The logger. */ |
| private final Logger logger = LoggerFactory.getLogger(this.getClass()); |
| |
| /** The package admin. */ |
| private final PackageAdmin pckAdmin; |
| |
| /** The bundle context. */ |
| private final BundleContext context; |
| |
| private final Set<Long> usedBundles = Collections.synchronizedSet(new HashSet<Long>()); |
| |
| private final Set<String> unresolvedPackages = Collections.synchronizedSet(new HashSet<String>()); |
| |
| /** |
| * Create a new service instance |
| * @param ctx The bundle context. |
| * @param pckAdmin The package admin. |
| */ |
| public DynamicClassLoaderManagerFactory(final BundleContext ctx, |
| final PackageAdmin pckAdmin) { |
| this.context = ctx; |
| this.pckAdmin = pckAdmin; |
| } |
| |
| /** |
| * @see org.osgi.framework.ServiceFactory#getService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration) |
| */ |
| public Object getService(final Bundle bundle, |
| final ServiceRegistration registration) { |
| final DynamicClassLoaderManagerImpl manager = new DynamicClassLoaderManagerImpl(this.context, |
| this.pckAdmin, new BundleProxyClassLoader(bundle), this); |
| return manager; |
| } |
| |
| /** |
| * @see org.osgi.framework.ServiceFactory#ungetService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration, java.lang.Object) |
| */ |
| public void ungetService(final Bundle bundle, |
| final ServiceRegistration registration, |
| final Object service) { |
| if ( service != null ) { |
| ((DynamicClassLoaderManagerImpl)service).deactivate(); |
| } |
| } |
| |
| /** |
| * Check if a bundle has been used for class loading. |
| * @param bundleId The bundle id. |
| * @return <code>true</code> if the bundle has been used. |
| */ |
| public boolean isBundleUsed(final long bundleId) { |
| return usedBundles.contains(bundleId); |
| } |
| |
| /** |
| * Notify that a bundle is used as a source for class loading. |
| * @param bundle The bundle. |
| */ |
| public void addUsedBundle(final Bundle bundle) { |
| final long id = bundle.getBundleId(); |
| this.usedBundles.add(id); |
| } |
| |
| /** |
| * Notify that a package is not found during class loading. |
| * @param pckName The package name. |
| */ |
| public void addUnresolvedPackage(final String pckName) { |
| this.unresolvedPackages.add(pckName); |
| } |
| |
| /** |
| * Check if an exported package from the bundle has not been |
| * found during previous class loading attempts. |
| * @param bundle The bundle to check |
| * @return <code>true</code> if a package has not be found before |
| */ |
| public boolean hasUnresolvedPackages(final Bundle bundle) { |
| if ( !this.unresolvedPackages.isEmpty() ) { |
| final ExportedPackage[] pcks = this.pckAdmin.getExportedPackages(bundle); |
| if ( pcks != null ) { |
| for(final ExportedPackage pck : pcks ) { |
| if ( this.unresolvedPackages.contains(pck.getName()) ) { |
| logger.debug("Bundle '{}' provides package '{}' which has been previously unsuccessfully requested!", bundle, pck.getName()); |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| } |