Glassfish example source code file (OsgiWeldServlet.java)

This example Glassfish source code file (OsgiWeldServlet.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

error, error, export-package, http, httpservletresponse, import-package, io, ioexception, ioexception, jar, jarfile, ok, override, request, response, servlet, servletexception, servletexception, string, string

The Glassfish OsgiWeldServlet.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 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 osgiweld;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Test integrity of OSGi Weld Module.
 * 
 * @author Santiago.PericasGeertsen@sun.com
 */
public class OsgiWeldServlet extends HttpServlet {

    private static List<Attributes.Name> ATTRS =
            Arrays.asList(new Attributes.Name("Export-Package"),
                          new Attributes.Name("Import-Package"));
                          //new Attributes.Name("Private-Package")); 
            //From Weld 1.1, Private-Package is not part of the OSGi headers

    protected void processRequest(HttpServletRequest request,
            HttpServletResponse response)
            throws ServletException, IOException
    {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

        String result = "OK";
        try {
            String gfhome = System.getProperty("com.sun.aas.instanceRoot");
            // Soft test, ignore if can't find module
            if (gfhome != null) {
                String jarFile = gfhome + File.separator + ".."
                        + File.separator + ".." + File.separator
                        + "modules" + File.separator + "weld-osgi-bundle.jar";
                //System.out.println("Weld Osgi module = " + jarFile);
                JarFile jar = new JarFile(jarFile);
                Manifest manifest = jar.getManifest();

                String command = request.getParameter("command");
                //System.out.println("Command: " + command);
                if (command.equals("manifest")) {
                    // Make sure all manifest attrs are there
                    Set<Object> keys = manifest.getMainAttributes().keySet();
                    //System.out.println("Keys: " + keys);
                    if (!keys.containsAll(ATTRS) || !checkBundleSymbolicName(manifest.getMainAttributes())) {
                        result = "ERROR";
                    }
                } else if (command.equals("exports")) {
                    // Make sure package exports are present and return them
                    String exportedValues = manifest.getMainAttributes().getValue(new Attributes.Name("Export-Package"));
                    //System.out.println("Exported Values: " + exportedValues);
                    if (null != exportedValues) {
                        result = exportedValues;
                    } else {
                        result = "ERROR";
                    }
                } else if (command.equals("imports")) {
                    //Make sure package imports are present and return them
                    String importedValues = manifest.getMainAttributes().getValue(new Attributes.Name("Import-Package"));
                    //System.out.println("Imported Values: " + importedValues);
                    if (null != importedValues) {
                        result = importedValues;
                    } else {
                        result = "ERROR";
                    }
                }
            } else {
                System.out.println("Unable to find Weld module");
            }
        } catch (Exception e) {
            result = "ERROR";
        }

        out.println(result);
        out.close();
    }

    private boolean checkBundleSymbolicName(Attributes attrs){
        String name = attrs.getValue("Bundle-SymbolicName");
        System.out.println("Bundle-SymbolicName:"+ name);
        return name.equals("org.jboss.weld.osgi-bundle");
    }

    /** 
     * Handles the HTTP <code>GET method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}