Gateway Tutorial: VXML Application | Email CNT End Servlet

This is the Servlet providing caller choice after the email content is read. The caller can choose to listen to the message again, delete the email, move to the next email, or reply the email by record an audio file as an attachment.

Source Code

package vx.apps.email;

import java.io.PrintWriter;
import java.io.IOException;
import javax.servlet.http.*;


public class EmailCntEndServlet extends HttpServlet
{
  public void service(HttpServletRequest request,
                      HttpServletResponse response)
    throws IOException
  {
    PrintWriter pw = response.getWriter();

    pw.println("<?xml version=\"1.0\"?>");
    pw.println("<vxml version=\"1.0\">");

    EmailManager email_agent = EmailManager.getInstance(request);
    if (email_agent == null) {
        pw.println("</vxml>");
        return;
    }

    String indexstr = request.getParameter("index");

    pw.println("<form>");
    pw.println(" <var name=\"index\" expr=\"'" + indexstr + "'\"/>");
    pw.println(" <var name=\"fromapp\" expr=\"'email'\"/>");

    pw.println(" <field name=\"action\">");
    pw.println(" <prompt>");
    pw.println(" <audio src=\"audio/${GW_RECORDED_VOICE}/
                      listen_next_reply_del.wav\"/>");
    pw.println(" </prompt>");
    pw.println(" <grammar>");
    pw.println(" listen | next | reply | delete this email");
    pw.println(" </grammar>");
    pw.println(" <filled>");
    pw.println(" <if cond=\"action == 'listen'\">");
    pw.println(" <submit next=\"email_cnt\" namelist=\"index\"/>");
    pw.println(" <elseif cond=\"action == 'next'\"/>");
    pw.println(" <assign name=\"index\" expr=\"" + indexstr + "+1\"/>");
    pw.println(" <submit next=\"email_msg\" namelist=\"index\"/>");
    pw.println(" <elseif cond=\"action == 'delete this email'\"/>");
    pw.println(" <submit next=\"email_del\" namelist=\"index\"/>");
    pw.println(" <elseif cond =\"action == 'reply'\"/>");
    pw.println(" <submit next=\"recordEmail\" namelist=\"index\"/>");
    pw.println(" </if>");
    pw.println(" </filled>");
    pw.println(" </field>");

    pw.println("</form>");
    pw.println("</vxml>");
  }
}