| /* |
| * Copyright (c) 2007, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package com.sun.enterprise.v3.server; |
| |
| import org.glassfish.hk2.api.ServiceLocator; |
| import org.glassfish.internal.api.DelegatingClassLoader; |
| import org.glassfish.internal.api.ClassLoaderHierarchy; |
| import jakarta.inject.Inject; |
| import org.jvnet.hk2.annotations.Service; |
| |
| import jakarta.inject.Singleton; |
| |
| import java.net.MalformedURLException; |
| import java.net.URI; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.*; |
| import java.io.IOException; |
| |
| /** |
| * This class is responsible for constructing class loader that has visibility |
| * to deploy time libraries (--libraries and EXTENSION_LIST of MANIFEST.MF, |
| * provided the library is available in 'applibs' directory) for an application. |
| * It is different from CommonClassLoader in a sense that the libraries that are part of |
| * common class loader are shared by all applications, where as this class |
| * loader adds a scope to a library. |
| * |
| * @author Sanjeeb.Sahoo@Sun.COM |
| */ |
| @Service |
| @Singleton |
| public class AppLibClassLoaderServiceImpl { |
| /* |
| * TODO(Sahoo): Not Yet Properly Implemented, as we have to bring in |
| * all the changes from |
| * http://fisheye5.cenqua.com/browse/glassfish/appserv-core/src/java/com/sun/enterprise/loader/EJBClassPathUtils.java |
| * To be specific, we have to bring in createApplicationLibrariesClassLoader(). |
| */ |
| |
| @Inject |
| ServiceLocator habitat; |
| |
| @Inject |
| CommonClassLoaderServiceImpl commonCLS; |
| |
| private Map<URI, DelegatingClassLoader.ClassFinder> classFinderRegistry = |
| new HashMap<URI, DelegatingClassLoader.ClassFinder>(); |
| |
| /** |
| * @see org.glassfish.internal.api.ClassLoaderHierarchy#getAppLibClassLoader(String, List<URI>) |
| */ |
| public ClassLoader getAppLibClassLoader(String application, List<URI> libURIs) |
| throws MalformedURLException { |
| |
| ClassLoaderHierarchy clh = habitat.getService(ClassLoaderHierarchy.class); |
| DelegatingClassLoader connectorCL = clh.getConnectorClassLoader(application); |
| |
| if (libURIs == null || libURIs.isEmpty()) { |
| // Optimization: when there are no libraries, why create an empty |
| // class loader in the hierarchy? Instead return the parent. |
| return connectorCL; |
| } |
| |
| final ClassLoader commonCL = commonCLS.getCommonClassLoader(); |
| DelegatingClassLoader applibCL = AccessController.doPrivileged(new PrivilegedAction<DelegatingClassLoader>() { |
| public DelegatingClassLoader run() { |
| return new DelegatingClassLoader(commonCL); |
| } |
| }); |
| |
| // order of classfinders is important here : |
| // connector's classfinders should be added before libraries' classfinders |
| // as the delegation hierarchy is appCL->app-libsCL->connectorCL->commonCL->API-CL |
| // since we are merging connector and applib classfinders to be at same level, |
| // connector classfinders need to be be before applib classfinders in the horizontal |
| // search path |
| for (DelegatingClassLoader.ClassFinder cf : connectorCL.getDelegates()) { |
| applibCL.addDelegate(cf); |
| } |
| addDelegates(libURIs, applibCL); |
| |
| return applibCL; |
| } |
| |
| private void addDelegates(Collection<URI> libURIs, DelegatingClassLoader holder) |
| throws MalformedURLException { |
| |
| ClassLoader commonCL = commonCLS.getCommonClassLoader(); |
| for (URI libURI : libURIs) { |
| synchronized (this) { |
| DelegatingClassLoader.ClassFinder libCF = classFinderRegistry.get(libURI); |
| if (libCF == null) { |
| libCF = new URLClassFinder(new URL[]{libURI.toURL()}, commonCL); |
| classFinderRegistry.put(libURI, libCF); |
| } |
| holder.addDelegate(libCF); |
| } |
| } |
| } |
| |
| /** |
| * @see org.glassfish.internal.api.ClassLoaderHierarchy#getAppLibClassFinder(List<URI>) |
| */ |
| public DelegatingClassLoader.ClassFinder getAppLibClassFinder(Collection<URI> libURIs) |
| throws MalformedURLException { |
| final ClassLoader commonCL = commonCLS.getCommonClassLoader(); |
| DelegatingClassLoader appLibClassFinder = AccessController.doPrivileged(new PrivilegedAction<DelegatingClassLoader>() { |
| public DelegatingClassLoader run() { |
| return new AppLibClassFinder(commonCL); |
| } |
| }); |
| addDelegates(libURIs, appLibClassFinder); |
| return (DelegatingClassLoader.ClassFinder)appLibClassFinder; |
| } |
| |
| private static class URLClassFinder extends URLClassLoader |
| implements DelegatingClassLoader.ClassFinder { |
| |
| public URLClassFinder(URL[] urls, ClassLoader parent) { |
| super(urls, parent); |
| } |
| |
| public Class<?> findClass(String name) throws ClassNotFoundException { |
| Class<?> c = this.findLoadedClass(name); |
| if (c!=null) { |
| return c; |
| } |
| return super.findClass(name); |
| } |
| |
| public Class<?> findExistingClass(String name) { |
| return super.findLoadedClass(name); |
| } |
| } |
| |
| private static class AppLibClassFinder extends DelegatingClassLoader implements DelegatingClassLoader.ClassFinder { |
| |
| public AppLibClassFinder(ClassLoader parent, List<DelegatingClassLoader.ClassFinder> delegates) |
| throws IllegalArgumentException { |
| super(parent, delegates); |
| } |
| |
| public AppLibClassFinder(ClassLoader parent) { |
| super(parent); |
| } |
| |
| public Class<?> findExistingClass(String name) { |
| // no action needed as parent is delegating classloader which will never be a defining classloader |
| return null; |
| } |
| |
| public URL findResource(String name) { |
| return super.findResource(name); |
| } |
| |
| public Enumeration<URL> findResources(String name) throws IOException { |
| return super.findResources(name); |
| } |
| } |
| } |