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<factory>
        <exception-handler-factory>org.primefaces.extensions.component.ajaxerrorhandler.AjaxExceptionHandlerFactory</exception-handler-factory>
 </factory>

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public class EregionExceptionHandlerFactory extends ExceptionHandlerFactory{
	
	private ExceptionHandlerFactory base;
    
    public EregionExceptionHandlerFactory(ExceptionHandlerFactory base) {
        this.base = base;
    }
    
    @Override
    public ExceptionHandler getExceptionHandler() {
        return new EregionExceptionHandler(base.getExceptionHandler());
    }

}

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public class EregionExceptionHandler extends ExceptionHandlerWrapper{
	
	private ExceptionHandler wrapped;

    public EregionExceptionHandler(ExceptionHandler wrapped) {
        this.wrapped = wrapped;
    }
	
	@Override
	public ExceptionHandler getWrapped() {
		 return this.wrapped;
	}
	
	@Override
    public void handle() throws FacesException {
		 for (Iterator<ExceptionQueuedEvent> i = getUnhandledExceptionQueuedEvents().iterator(); i.hasNext();) {
	            ExceptionQueuedEvent event = i.next();
	            ExceptionQueuedEventContext context = (ExceptionQueuedEventContext) event.getSource();
	            Throwable t = context.getException();
	            if (t instanceof ViewExpiredException) {
	                ViewExpiredException vee = (ViewExpiredException) t;
	                FacesContext fc = FacesContext.getCurrentInstance();
	                Map<String, Object> requestMap = fc.getExternalContext().getRequestMap();
	                NavigationHandler nav =
	                        fc.getApplication().getNavigationHandler();
	                try {
	                    requestMap.put("currentViewId", vee.getViewId());
	 
	                    nav.handleNavigation(fc, null, "index?faces-redirect=true&expired=true");
	                    fc.renderResponse();
	 
	                } finally {
	                    i.remove();
	                }
	            }
	        }
	        getWrapped().handle();        
	}

}

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<h:form prependId="false">
		<p:confirmDialog header="Info" severity="alert" appendToBody="true"
	                         visible="#{not empty param['expired']}" 
	                         message="Session expired" widgetVar="confirmDlg" >
	    	<p:commandButton type="button" value="OK" onclick="confirmDlg.hide()"/>
	    </p:confirmDialog>	
	</h:form>

<pe:ajaxErrorHandler />

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<factory>
        <exception-handler-factory>org.primefaces.extensions.component.ajaxerrorhandler.AjaxExceptionHandlerFactory</exception-handler-factory>
</factory>

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	<security:http>
			...
		<security:custom-filter ref="jsfAjaxRedirectSessionManagementFilter" before="SESSION_MANAGEMENT_FILTER"/>
	</security:http>
	
	<bean id="httpSessionSecurityContextRepository" class="org.springframework.security.web.context.HttpSessionSecurityContextRepository"/>
	
	<bean id="jsfAjaxRedirectSessionManagementFilter" class="org.springframework.security.web.session.SessionManagementFilter">

		<!-- default -->
		<constructor-arg name="securityContextRepository" ref="httpSessionSecurityContextRepository" />

		<property name="invalidSessionStrategy" ref="jsfRedirectStrategy" />
	</bean>

	<bean id="jsfRedirectStrategy" class="ru.evosystems.aurix.surfbird.web.session.AjaxJSFRedirectStrategy">
		<constructor-arg name="invalidSessionUrl" value="/views/login.jsf" />
	</bean>

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public class AjaxJSFRedirectStrategy implements InvalidSessionStrategy{
	private static final Logger log = LoggerFactory.getLogger(AjaxJSFRedirectStrategy.class);

	private String invalidSessionUrl;

	public AjaxJSFRedirectStrategy(String invalidSessionUrl) {
		this.invalidSessionUrl = invalidSessionUrl;
	}

	@Override
	public void onInvalidSessionDetected(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
		log.debug("onInvalidSessionDetected()");

		String url = request.getContextPath() + invalidSessionUrl;
		if ("partial/ajax".equals(request.getHeader("Faces-Request"))) {

			log.debug("call JSF redirect to url: " + url);

			sendJsfRedirect(response, url);
		}
		else{
			log.debug("call standart response redirect to url: " + url);

			response.sendRedirect(url);
		}
	}
	
	public void sendJsfRedirect(HttpServletResponse response, String url) throws IOException{
		String ajaxRedirectXml =
				"<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
				"<partial-response><redirect url=\""+url+"\"></redirect></partial-response>";
		response.setContentType("text/xml");
		response.getWriter().write(ajaxRedirectXml);
	}
}