Package pl.edu.icm.unity.engine.api.utils

Class RoutingServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

pl.edu.icm.unity.engine.api.utils.RoutingServlet

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class RoutingServlet
extends javax.servlet.http.HttpServlet

Simple routing (dispatching) servlet. Requires a default target servlet path and can have additional servlets registered. Should be installed as an entry point for externally visible path. Subsequently it routes all requests to a current destination. The destination can be changed with a customized forward.

Internally stores state in a single session variable.

Author:

K. Benedyczak

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static String	CURRENT_DESTINATION

Constructor Summary

Constructors

Constructor	Description
RoutingServlet(String defaultTarget)

Method Summary

Modifier and Type	Method	Description
static void	clean(javax.servlet.http.HttpServletRequest req)	Cleans any previous routing settings.
static void	forwardTo(String newDestination, javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)	The routing will be reconfigured to forward all requests to the given destination.
protected void	service(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

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

Field Detail

CURRENT_DESTINATION

public static final String CURRENT_DESTINATION

Constructor Detail

RoutingServlet

public RoutingServlet(String defaultTarget)

Method Detail

service

protected void service(javax.servlet.http.HttpServletRequest req,
                       javax.servlet.http.HttpServletResponse resp)
                throws javax.servlet.ServletException,
                       IOException

Overrides:

service in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

forwardTo

public static void forwardTo(String newDestination,
                             javax.servlet.http.HttpServletRequest req,
                             javax.servlet.http.HttpServletResponse resp)
                      throws javax.servlet.ServletException,
                             IOException

The routing will be reconfigured to forward all requests to the given destination.

Parameters:

newDestination -

req -

resp -

Throws:

javax.servlet.ServletException

IOException

clean

public static void clean(javax.servlet.http.HttpServletRequest req)

Cleans any previous routing settings. Useful when a new interaction is started, but when the old session is still used.

Parameters:

req -