Create a filter class,
package com.jijo;
import java.lang.reflect.Method;
import org.directwebremoting.AjaxFilter;
import org.directwebremoting.AjaxFilterChain;
import org.directwebremoting.WebContextFactory;
import org.directwebremoting.extend.LoginRequiredException;
public class DwrFilter implements AjaxFilter {
public Object doFilter(Object obj, Method method, Object[] params, AjaxFilterChain chain) throws Exception {
//Check if session has timedout/invalidated
String username = WebContextFactory.get().getSession().getAttribute("username");
if (username != null) {
}
else{
throw new LoginRequiredException( "sessionout" );
//sessionout is a message,access this message in the jsp or html
}
return chain.doFilter( obj, method, params );
}
}
configure this filter class in your bean tage inside the
dwr.xml
filter tag
eg:
<filter class="com.jijo.DwrFilter" >
Also in your dwr.xml file configure,
covert tag starts
<convert match="org.directwebremoting.extend.LoginRequiredException" converter="bean" />
Then in your jsp page inside the javascript tag,
first include the
/dwr/engine.js and also the
//start javascript tag
dwr.engine.setErrorHandler(errorHandler);
function errorHandler(message, exception){
//forwrd to login page
if(message == 'sessionout'){ //'sessionout'- is message from the filter class you configured
window.location = "login.jsp"
}
}
//end of javascript tag
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