appserver/tests/appserv-tests/devtests/deployment/war/appmgt/appmgttest/TestServlet.java

/*
 * Copyright (c) 1997, 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 appmgttest;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingEnumeration;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

/**
 *
 * @author tjquinn
 */
public class TestServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/plain;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /*
             * Write the env-entry information.
             */
            Context ctx = new InitialContext();
            for (NamingEnumeration<Binding> e = ctx.listBindings("java:comp/env"); e.hasMore(); ) {
                Binding b = e.next();// java:comp/env/xxx
                final String name = b.getName().substring("java:comp/env/".length());
                final String cl = b.getClassName();
                final Object o = b.getObject();
                EnvEntryInfo env = new EnvEntryInfo(name, cl, o.toString());
                out.println("-env " + env.toStringBrief());
            }

            /*
             * Write the context-param info.
             */
            final ServletContext servletContext = getServletContext();
            for (Enumeration<String> names = servletContext.getInitParameterNames(); names.hasMoreElements();) {
                final String name = names.nextElement();
                final String value = servletContext.getInitParameter(name);
                final ParamInfo param = new ParamInfo(name, value);
                out.println("-param " + param.toStringBrief());
            }

            out.flush();

        } catch (Exception e) {
            e.printStackTrace(out);
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> 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</code> 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 "Retrieves current env-entry and context-param settings";
    }// </editor-fold>

}