Glassfish example source code file (JDBCDriverURLStreamHandlerService.java)

This example Glassfish source code file (JDBCDriverURLStreamHandlerService.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

io, ioexception, ioexception, jar, jdbcdriverurlstreamhandlerservice, log, logging, net, network, override, override, pipedinputstream, pipedoutputstream, string, string, uri, url, urlclassloader, urlconnection, urlconnection

The Glassfish JDBCDriverURLStreamHandlerService.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.osgijdbc;

import org.glassfish.osgijavaeebase.JarHelper;
import org.osgi.service.url.AbstractURLStreamHandlerService;

import java.io.*;
import java.net.*;
import java.util.jar.*;
import java.util.logging.Level;
import java.util.logging.Logger;


public class JDBCDriverURLStreamHandlerService extends AbstractURLStreamHandlerService {

    private static final Logger logger = Logger.getLogger(
            JDBCDriverURLStreamHandlerService.class.getPackage().getName());

    private ClassLoader apiClassLoader;

    public JDBCDriverURLStreamHandlerService(ClassLoader apiClassLoader){
        this.apiClassLoader = apiClassLoader;
    }

    public URLConnection openConnection(URL u) throws IOException {
        assert (Constants.JDBC_DRIVER_SCHEME.equals(u.getProtocol()));
        try {
            debug("jdbc driver openConnection()");
            //final URL[] urls = getURLs(u);
            //final URL uberJarURL = getUberJarURL(urls);
            //final URLConnection con = uberJarURL.openConnection();
            //return new URLConnection(uberJarURL) {


            URI embeddedURI = new URI(u.toURI().getSchemeSpecificPart());
            URL embeddedURL = embeddedURI.toURL();
            final URLConnection con = embeddedURL.openConnection();
            final URLClassLoader cl = new URLClassLoader(new URL[]{embeddedURL}, apiClassLoader);
            return new URLConnection(embeddedURL) {
                private Manifest m;

                public void connect() throws IOException {
                    con.connect();
                }

                @Override
                public InputStream getInputStream() throws IOException {
                    connect();
                    m = JDBCJarManifestProcessor.processManifest(url, cl);
                    final PipedOutputStream pos = new PipedOutputStream();
                    final PipedInputStream pis = new PipedInputStream(pos);

                    // It is a common practice to spawn a separate thread
                    // to write to PipedOutputStream so that the reader
                    // and writer are not deadlocked.
                    new Thread() {
                        @Override
                        public void run() {
                            JarHelper.write(con, pos, m);
                        }
                    }.start();

                    return pis;
                }
            };
        }
        catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    protected void setURL(URL u, String protocol, String host, int port, String auth, String user,
                          String path, String query, String ref) {
        super.setURL(u, protocol, host, port, auth, user, path, query, ref);
        debug("jdbc driver setURL()");
    }

    private void debug(String s) {
        if(logger.isLoggable(Level.FINEST)){
            logger.finest("[osgi-jdbc] : " + s);
        }
    }

/*
    private URL getUberJarURL(URL[] urls) throws IOException, URISyntaxException {

        if (urls.length == 1) {
            URL u = urls[0];
            URI embeddedURI = new URI(u.toURI().getSchemeSpecificPart());
            return embeddedURI.toURL();
        }

        if (urls.length > 1) {
            File file = new File(new URI(urls[0].toURI().getSchemeSpecificPart()));
            JarFile jar = new JarFile(file);
            File uberFile = File.createTempFile("jdbc-driver-", ".jar");
            uberFile.deleteOnExit();

            try {
                FileOutputStream fos = new FileOutputStream(uberFile);
                JarOutputStream uberJarOS = new JarOutputStream(fos);

                byte buffer[] = new byte[1024];
                int bytesRead;

                try {
                    Enumeration entries = jar.entries();

                    while (entries.hasMoreElements()) {
                        JarEntry entry = (JarEntry) entries.nextElement();
                        InputStream is = jar.getInputStream(entry);
                        uberJarOS.putNextEntry(entry);
                        while ((bytesRead = is.read(buffer)) != -1) {
                            uberJarOS.write(buffer, 0, bytesRead);
                        }
                    }

                    // Add new file(s) to the end
                    for (int i = 1; i < urls.length; i++) {
                        URL url = urls[i];
                        File f = new File(url.toURI());
                        FileInputStream fis = new FileInputStream(f);

                        try {
                            JarEntry entry = new JarEntry(f.getName());
                            uberJarOS.putNextEntry(entry);

                            while ((bytesRead = fis.read(buffer)) != -1) {
                                uberJarOS.write(buffer, 0, bytesRead);
                            }
                        } finally {
                            fis.close();
                        }
                    }
                } catch (IOException ex) {
                    System.err.println
                            ("Operation aborted due to : " + ex);
                } finally {
                    try {
                        uberJarOS.close();
                    } catch (IOException ioe) {
                    }
                }
            } catch (IOException ex) {
                System.err.println(
                        "Can't access new file : " + ex);
            } finally {
                try {
                    jar.close();
                } catch (IOException ioe) {
                }

            }
            return uberFile.toURI().toURL();
        }
        throw new IllegalStateException("Atleast one jar file need to be specified");
    }



    private URL[] getURLs(URL u) throws MalformedURLException {
        String urls = u.toString();
        StringTokenizer tokenizer = new StringTokenizer(urls, ",");
        ArrayList<URL> urlList = new ArrayList();
        while (tokenizer.hasMoreElements()) {
            String s = (String) tokenizer.nextElement();
            URL url = new URL(s);
            urlList.add(url);
        }
        return urlList.toArray(new URL[urlList.size()]);
    }
*/

}