modules/gemfire-modules-tomcat7/src/test/java/com/gemstone/gemfire/modules/session/CommandServlet.java

/*=========================================================================
 * Copyright (c) 2010-2014 Pivotal Software, Inc. All Rights Reserved.
 * This product is protected by U.S. and international copyright
 * and intellectual property laws. Pivotal products are covered by
 * one or more patents listed at http://www.pivotal.io/patents.
 *=========================================================================
 */

package com.gemstone.gemfire.modules.session;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 */
public class CommandServlet extends HttpServlet {

  private ServletContext context;

  /**
   * The standard servlet method overridden.
   *
   * @param request
   * @param response
   * @throws IOException
   */
  @Override
  protected void doGet(HttpServletRequest request,
      HttpServletResponse response) throws IOException, ServletException {

    QueryCommand cmd = QueryCommand.UNKNOWN;
    String param = request.getParameter("param");
    String value = request.getParameter("value");
    PrintWriter out = response.getWriter();

    String cmdStr = request.getParameter("cmd");
    if (cmdStr != null) {
      cmd = QueryCommand.valueOf(cmdStr);
    }

    HttpSession session = request.getSession();

    switch (cmd) {
      case SET:
        session.setAttribute(param, value);
        break;
      case GET:
        String val = (String) session.getAttribute(param);
        if (val != null) {
          out.write(val);
        }
        break;
      case INVALIDATE:
        session.invalidate();
        break;
      case CALLBACK:
        Callback c = (Callback) context.getAttribute("callback");
        c.call(request, response);
        break;
    }
  }

  /**
   * Save a reference to the ServletContext for later use.
   *
   * @param config
   */
  @Override
  public void init(ServletConfig config) {
    this.context = config.getServletContext();
  }
}