Glassfish example source code file (EJBBundle.java)

This example Glassfish source code file (EJBBundle.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

archiveentry, archiveentry, ejbbundle, exception, handling, io, ioexception, ioexception, net, network, proper, runtimeexception, string, todo, uriable, uriable, urisyntaxexception, util

The Glassfish EJBBundle.java source code

/*
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 *
 * Copyright (c) 2009-2010 Oracle and/or its affiliates. All rights reserved.
 *
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 * 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:
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 */


package org.glassfish.osgiejb;

import org.glassfish.api.deployment.archive.Archive;
import org.glassfish.osgijavaeebase.OSGiBundleArchive;
import org.glassfish.osgijavaeebase.OSGiJavaEEArchive;
import org.glassfish.osgijavaeebase.URIable;
import org.osgi.framework.Bundle;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * @author Sanjeeb.Sahoo@Sun.COM
 */
public class EJBBundle extends OSGiJavaEEArchive {

    public EJBBundle(Bundle[] fragments, Bundle host) {
        super(fragments, host);
    }

    @Override
    protected void init() {
        // Very important implementation note:
        //
        // Now we need to merge individual namespaces represented in each of the the subarchives
        // corresponding to entries in the effetcive bundle classpath.
        // During merging of namespaces, collision can be expected. e.g.:
        // a bundle with BCP: bin, . and having a content tree like this:
        // p/A.class, bin/p/A.class.
        // Actually, there is only name here which is p/A.class, but it appears in both the namespaces.
        // Our collision avoidance strategy is based on how Bundle.getResource() behaves. Since bin
        // appears ahead of . in BCP, bundle.getResource(p/A.class) will return bin/p/A.class.
        // So,our merged namespace must also contain bin/p/A.class.
        // The simplest way to achieve this is to collect entries from the subarchives in the reverse
        // order of bundle classpath and put them into a hasmap with entry name being the key.
        // See https://glassfish.dev.java.net/issues/show_bug.cgi?id=14268
        final EffectiveBCP bcp = getEffectiveBCP();
        List<BCPEntry> bcpEntries = new ArrayList(bcp.getBCPEntries());
        Collections.reverse(bcpEntries);
        for (BCPEntry bcpEntry : bcpEntries) {
            bcpEntry.accept(new BCPEntry.BCPEntryVisitor() {

                public void visitDir(final DirBCPEntry bcpEntry) {
                visitBCPEntry(bcpEntry);
            }

            public void visitJar(final JarBCPEntry bcpEntry) {
                // do special processing for Bundle-ClassPath DOT
                if (bcpEntry.getName().equals(DOT)) {
                    OSGiBundleArchive subArchive = getArchive(bcpEntry.getBundle());
                    addEntriesForSubArchive(subArchive);
                } else {
                    visitBCPEntry(bcpEntry);
                }
            }

            private void visitBCPEntry(BCPEntry bcpEntry) {
                try {
                    final Archive subArchive = getArchive(bcpEntry.getBundle()).getSubArchive(bcpEntry.getName());
                    addEntriesForSubArchive(subArchive);
                } catch (IOException e) {
                    throw new RuntimeException(e); // TODO(Sahoo): Proper Exception Handling
                }
            }

            private void addEntriesForSubArchive(Archive subArchive) {
                final URIable uriableArchive = (URIable) subArchive;
                for (final String subEntry : Collections.list(subArchive.entries())) {
                    ArchiveEntry archiveEntry = new ArchiveEntry() {
                        public String getName() {
                            return subEntry;
                        }

                        public URI getURI() throws URISyntaxException {
                            return uriableArchive.getEntryURI(subEntry);
                        }

                        public InputStream getInputStream() throws IOException {
                            try {
                                return getURI().toURL().openStream();
                            } catch (URISyntaxException e) {
                                throw new RuntimeException(e); // TODO(Sahoo): Proper Exception Handling
                            }
                        }
                    };
                    getEntries().put(archiveEntry.getName(), archiveEntry);
                }
            }

        });
        }
    }
}