zeta.handler
Class DataHandler

java.lang.Object
  |
  +--zeta.handler.DataHandler

All Implemented Interfaces:

GetHandler, PostHandler

public class DataHandler

extends java.lang.Object

implements GetHandler, PostHandler

Handles GET requests to retrieve work units of another server. The GET request req can contain the following parameters:

• list - returns a list of of all available work units.
• dir - returns a list of all available work units except the latest.
• get - get a specified work unit.
• put - put a specified work unit.
• del - delete a specified work unit.

The response resp contains alist of work units or the data of a specified work unit.

Field Summary

private ZetaServlet

servlet Servlet which owns this handler.

Constructor Summary

DataHandler(ZetaServlet servlet)

Method Summary

void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) Handles GET requests to retrieve work units of another server.
void	doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) Handles a POST request to put work units from another server.
private static java.lang.String	getParameter(java.util.Map parameter, java.lang.String key) Returns a value for a key from the specified map with parameters.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

servlet

private ZetaServlet servlet

Servlet which owns this handler.

Constructor Detail

DataHandler

public DataHandler(ZetaServlet servlet)

Parameters:

servlet - servlet which owns this handler.

Method Detail

doGet

public void doGet(javax.servlet.http.HttpServletRequest req,
                  javax.servlet.http.HttpServletResponse resp)
           throws javax.servlet.ServletException,
                  java.io.IOException

Handles GET requests to retrieve work units of another server. The GET request req can contain the following parameters:

• list - returns a list of of all available work units.
• dir - returns a list of all available work units except the latest.
• get - get a specified work unit.
• del - delete a specified work unit.

The response resp contains a list of work units or the data of a specified work unit.

Specified by:

doGet in interface GetHandler

javax.servlet.ServletException

java.io.IOException

doPost

public void doPost(javax.servlet.http.HttpServletRequest req,
                   javax.servlet.http.HttpServletResponse resp)
            throws javax.servlet.ServletException,
                   java.io.IOException

Handles a POST request to put work units from another server. The POST request req can contain the following parameters:

• dir - returns a list of work units.
• get - get a specified work unit.
• del - delete a specified work unit.

The response resp contains an 'ok' or an error.

Specified by:

doPost in interface PostHandler

javax.servlet.ServletException

java.io.IOException

getParameter

private static java.lang.String getParameter(java.util.Map parameter,
                                             java.lang.String key)

Returns a value for a key from the specified map with parameters.

Parameters:

parameter - map with parameters

key - key

Returns:

value for a key from the specified map with parameters; empty string if no value was found.