Class UpdateServlet

UpdateServlet

public class UpdateServlet

The UpdateServlet handles the automatic updating of the bioquery program, in collaboration with class BQUpdate on the Client side. BQUpdate determines the Build Number of the appropriate files, and sends the Build Number to this class, which checks the Build Number of the files on the server. If they are different, this class assumes the server has the most up-to-date version and sends it back to the Client.

Constructor Summary

UpdateServlet()

Method Summary

void	doGet(HttpServletRequest request, HttpServletResponse response) doGet method for testing purposes only.
void	doPost(HttpServletRequest request, HttpServletResponse response) Handles requests from the Client.
void	init() Loads the jar file directory parameter from the web.xml file.

Constructor Detail

UpdateServlet

public UpdateServlet()

Method Detail

init

public void init()
          throws ServletException

Loads the jar file directory parameter from the web.xml file.

doGet

public void doGet(HttpServletRequest request,
                  HttpServletResponse response)
           throws ServletException,
                  java.io.IOException

doGet method for testing purposes only. Not used by the program.

doPost

public void doPost(HttpServletRequest request,
                   HttpServletResponse response)
            throws ServletException,
                   java.io.IOException

Handles requests from the Client. Uses a Protocol based on constants in the BQUpdate class. Can handle 2 method requests: CHECK and RETRIEVE
CHECK means the Client is sending a filename and a Build Number. This Servlet will responsd with either BQUPDATE.OK or BQUPDATE.UPDATENEEDED After the Client receives an UPDATENEEDED Response, it will may ask for the update with the RETRIEVE method and will send the requested filename. The file will come back in the response.