Package com.vaadin.flow.server

Class UnsupportedBrowserEvent

java.lang.Object

java.util.EventObject

com.vaadin.flow.server.UnsupportedBrowserEvent

All Implemented Interfaces:

Serializable

public class UnsupportedBrowserEvent
extends EventObject

Event fired through the service event bus when a browser is shown the page telling that it is too old to run the application, just before the page is written to the response.

The bootstrap page detects a browser that lacks features the application needs and redirects it to that page, so the event is fired on the request thread of the redirected request. A browser too old to run the detection script at all never makes that request, and no event is fired for it.

Listen to the event to, for example, record which users run an outdated browser:

 service.getEventBus().addListener(UnsupportedBrowserEvent.class,
         event -> log(event.getRequest().getHeader("User-Agent")));
 

See Also:

• UnsupportedBrowserHandler
• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
UnsupportedBrowserEvent(VaadinService service, VaadinSession session, VaadinRequest request)	Creates a new event.

Method Summary

Modifier and Type	Method	Description
VaadinRequest	getRequest()	Gets the request for the page.
VaadinService	getService()	Gets the service that handles the request.
VaadinSession	getSession()	Gets the session of the browser.

Methods inherited from class java.util.EventObject

getSource, toString

Methods inherited from class java.lang.Object

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

Constructor Details

UnsupportedBrowserEvent

public UnsupportedBrowserEvent(VaadinService service,
 VaadinSession session,
 VaadinRequest request)

Creates a new event.

Parameters:

service - the service that handles the request, not null

session - the session of the browser, not null

request - the request for the page, not null

Method Details

getService

public VaadinService getService()

Gets the service that handles the request.

Returns:

the service, not null

getSession

public VaadinSession getSession()

Gets the session of the browser.

Returns:

the session, not null

getRequest

public VaadinRequest getRequest()

Gets the request for the page. The User-Agent header of the request tells which browser it is.

Returns:

the request, not null