Package com.vaadin.flow.server

Class RequestStartedEvent

java.lang.Object

java.util.EventObject

com.vaadin.flow.server.RequestStartedEvent

All Implemented Interfaces:

Serializable

public class RequestStartedEvent
extends EventObject

Event fired through the service event bus when the framework starts handling a request, on the request thread and after the request interceptors have run.

A message that a client sends through a push connection is reported as a request of its own, without a response. The daily active user tracking that runs for some requests before they reach Flow also reports them without a response in the RequestEndedEvent, although this event has one, so a missing response does not by itself mean a push message.

Every started event is followed by a RequestEndedEvent for the same request on the same thread, so a listener may keep timing state in a ThreadLocal. Requests are handled concurrently, so listeners must expect several requests to be in flight on several threads at once.

Since:

25.4

See Also:

• Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
RequestStartedEvent(VaadinService service, VaadinRequest request, VaadinResponse response)	Creates a new event.

Method Summary

Modifier and Type	Method	Description
VaadinRequest	getRequest()	Gets the request.
Optional<VaadinResponse>	getResponse()	Gets the response.
VaadinService	getService()	Gets the service handling the request.

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

RequestStartedEvent

public RequestStartedEvent(VaadinService service,
 VaadinRequest request,
 VaadinResponse response)

Creates a new event.

Parameters:

service - the service handling the request, not null

request - the request, not null

response - the response, or null for a push message

Method Details

getService

public VaadinService getService()

Gets the service handling the request.

Returns:

the service, not null

getRequest

public VaadinRequest getRequest()

Gets the request.

Returns:

the request, not null

getResponse

public Optional<VaadinResponse> getResponse()

Gets the response.

Returns:

the response, or an empty optional for a push message