import javax.servlet.*;
import java.util.Enumeration;
import java.io.IOException;

public class ContextDemoServlet implements Servlet {
  ServletConfig servletConfig;

  public void init(ServletConfig config) throws ServletException {
    servletConfig = config;
  }

  public void destroy() {
  }

  public void service(ServletRequest request, ServletResponse response) 
    throws ServletException, IOException {
  
    ServletContext servletContext = servletConfig.getServletContext();
    Enumeration attributes = servletContext.getAttributeNames();
    while (attributes.hasMoreElements()) {
      String attribute = (String) attributes.nextElement();
      System.out.println("Attribute name : " + attribute);
      System.out.println("Attribute value : " +
        servletContext.getAttribute(attribute));
    }

    System.out.println("Major version : " + servletContext.getMajorVersion());
    System.out.println("Minor version : " + servletContext.getMinorVersion());
    System.out.println("Server info : " + servletContext.getServerInfo());
  }

  public String getServletInfo() {
    return null;
  }
  public ServletConfig getServletConfig() {
    return null;
  }

}