org.directwebremoting.filter
Class ActionTimeoutAjaxFilter

java.lang.Object
  org.directwebremoting.filter.ActionTimeoutAjaxFilter

All Implemented Interfaces:

AjaxFilter

public class ActionTimeoutAjaxFilter
extends java.lang.Object
implements AjaxFilter

ScriptSessions are timed out based on total user activity, which includes reverse ajax calls. You may wish to timeout a ScriptSession while the user is still on the page if they have no taken any actions in the last 'n' seconds.

Author:

Joe Walker [joe at getahead dot ltd dot uk]

Constructor Summary

ActionTimeoutAjaxFilter()

Method Summary

java.lang.Object	doFilter(java.lang.Object obj, java.lang.reflect.Method method, java.lang.Object[] params, AjaxFilterChain chain) The doFilter method of the AjaxFilter is called by DWR each time an Ajax request is made on a method that this filter is configured against.
void	setActionTimeoutMillis(long actionTimeoutMillis) The time after which we detect out of date ScriptSessions, and time them out.
void	setOnTimeout(java.lang.String onTimeout) What do we ask the browser to do when the timeout happens?

Methods inherited from class java.lang.Object

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

Constructor Detail

ActionTimeoutAjaxFilter

public ActionTimeoutAjaxFilter()

Method Detail

doFilter

public java.lang.Object doFilter(java.lang.Object obj,
                                 java.lang.reflect.Method method,
                                 java.lang.Object[] params,
                                 AjaxFilterChain chain)
                          throws java.lang.Exception

Description copied from interface: AjaxFilter

The doFilter method of the AjaxFilter is called by DWR each time an Ajax request is made on a method that this filter is configured against. The AjaxFilterChain passed in to this method allows the filter to pass on method details to next entity in the chain.

Typically the method would do the following:

1. Examine the request
2. Optionally alter the method, object or parameters
3. Either invoke the next entity in the chain using the AjaxFilterChain or decide to take some other action instead.
4. Optionally modify the value returned to the user
5. Take some other action (e.g. logging)

Specified by:

doFilter in interface AjaxFilter

Parameters:

obj - The object to execute the method on (i.e. 'this')

method - The method to execute

params - The parameters to the method call

chain - Allow the request to be passed on

Returns:

The results of the method execution

Throws:

java.io.IOException - When some I/O error occurs

java.lang.Exception - When some processing goes wrong

setActionTimeoutMillis

public void setActionTimeoutMillis(long actionTimeoutMillis)

The time after which we detect out of date ScriptSessions, and time them out.

setOnTimeout

public void setOnTimeout(java.lang.String onTimeout)

What do we ask the browser to do when the timeout happens?