Package org.dellroad.stuff.vaadin24.util

Class VaadinSessionFinder

java.lang.Object

org.dellroad.stuff.vaadin24.util.VaadinSessionFinder

public final class VaadinSessionFinder
extends Object

Utility class for finding the VaadinSession associated with the current HTTP request when VaadinSession.getCurrent() isn't an option.

This class requires that Spring's RequestContextHolder is being used.

Method Summary

Modifier and Type	Method	Description
static boolean	access(Runnable action)	Invoke the given action in the context of the VaadinSession associated with the current HTTP request.
static Optional<VaadinSession>	find()	Find the VaadinSession associated with the current HTTP request.

Methods inherited from class java.lang.Object

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

Method Details

find

public static Optional<VaadinSession> find()

Find the VaadinSession associated with the current HTTP request.

The session is found by directly inspecting the current HTTP session, so this will work even if the current thread is not executing within the Vaadin servlet.

This method relies on Spring's RequestContextHolder to locate the current HTTP request.

Returns:

the VaadinSession associated with the current HTTP request, if any

access

public static boolean access(Runnable action)

Invoke the given action in the context of the VaadinSession associated with the current HTTP request.

Parameters:

action - the action to perform

Returns:

true if successfully dispatched, false if session was not found

Throws:

IllegalArgumentException - if action is null