Glassfish example source code file (OSGiEJBDeploymentContext.java)

This example Glassfish source code file (OSGiEJBDeploymentContext.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

arraylist, bundleclassloader, bundleclassloader, class, classloader, classloader, classnotfoundexception, delegatinginstrumentableclassloader, delegatinginstrumentableclassloader, exception, io, log, logging, net, network, osgiejbdeploymentcontext, override, override, url, util

The Glassfish OSGiEJBDeploymentContext.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.osgiejb;

import org.glassfish.osgijavaeebase.OSGiDeploymentContext;
import org.glassfish.osgijavaeebase.BundleClassLoader;
import org.glassfish.internal.api.Globals;
import org.glassfish.internal.api.ClassLoaderHierarchy;
import org.glassfish.api.ActionReport;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.api.deployment.OpsParams;
import org.glassfish.api.deployment.InstrumentableClassLoader;
import org.osgi.framework.Bundle;

import java.net.URL;
import java.util.Enumeration;
import java.util.List;
import java.util.ArrayList;
import java.util.logging.Logger;
import java.io.IOException;
import java.lang.instrument.ClassFileTransformer;

import com.sun.enterprise.module.common_impl.CompositeEnumeration;

/**
 * @author Sanjeeb.Sahoo@Sun.COM
 */
public class OSGiEJBDeploymentContext extends OSGiDeploymentContext {

    public OSGiEJBDeploymentContext(ActionReport actionReport, Logger logger, ReadableArchive source, OpsParams params, ServerEnvironment env, Bundle bundle) throws Exception {
        super(actionReport, logger, source, params, env, bundle);
    }

    protected void setupClassLoader() throws Exception {
        final BundleClassLoader delegate1 = new BundleClassLoader(bundle);
        final ClassLoader delegate2 =
                Globals.get(ClassLoaderHierarchy.class).getAPIClassLoader();

        ClassLoader cl = new DelegatingInstrumentableClassLoader(delegate1, delegate2);
        
        shareableTempClassLoader = cl;
        finalClassLoader = cl;
    }

    private static class DelegatingInstrumentableClassLoader extends ClassLoader implements InstrumentableClassLoader {

        private BundleClassLoader delegate1;
        private ClassLoader delegate2;

        private DelegatingInstrumentableClassLoader(BundleClassLoader delegate1, ClassLoader delegate2) {
            this.delegate1 = delegate1;
            this.delegate2 = delegate2;
        }

        @Override
        protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
            Class c = findLoadedClass(name);
            if (c == null) {
                try {
                    return delegate1.loadClass(name, resolve);
                } catch (ClassNotFoundException cnfe) {
                    return delegate2.loadClass(name);
                }
            }
            if (resolve) {
                resolveClass(c);
            }
            return c;
        }

        @Override
        public URL getResource(String name) {
            URL url = delegate1.getResource(name);
            if (url == null) {
                url = delegate2.getResource(name);
            }
            return url;
        }

        @Override
        public Enumeration<URL> getResources(String name) throws IOException {
            List<Enumeration enumerators = new ArrayList>();
            enumerators.add(delegate1.getResources(name));
            enumerators.add(delegate2.getResources(name));
            return new CompositeEnumeration(enumerators);
        }

        public ClassLoader copy() {
            // do nothing, since we don't expect any transformation to take place because of the way we implement
            // our JPA support. We actually do static enhancement.
            return this;
        }

        public void addTransformer(ClassFileTransformer transformer) {
            System.out.println("addTransformer called " + transformer);
            // do nothing, since we don't expect any transformation to take place because of the way we implement
            // our JPA support. We actually do static enhancement.
        }
    }
}