Vaadin23 vaadin.eagerServerLoad=true and BeforeEnterObserver

Asked Jan 18 '23 at 23:26

Active Jan 19 '23 at 11:13

Viewed 71 times

I switched to vaadin.eagerServerLoad=true in order to fix the issue with incorrect HTTP status code (I need to return 404 when it is needed).

I also noticed one issue which potentially maybe related to the vaadin.eagerServerLoad=true. On the views with com.vaadin.flow.router.BeforeEnterObserver the method BeforeEnterObserver.beforeEnter is executed twice when I for the very first time enter the page (please note that there is no such issue when I navigate between views in the already constructed UI). This is why now as a temporal fix I have to call removeAll() as a first line in the beforeEnter method.

What am I doing wrong and how to fix it?

edited Jan 19 '23 at 11:13

asked Jan 18 '23 at 23:26

alexanoid

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Have you checked if it calls beforeEnter on the same instance or are there maybe two instances? – Simon Martinelli Jan 19 '23 at 13:05
The method on the same instance is called 2 times – alexanoid Jan 19 '23 at 22:15
related issue https://github.com/vaadin/flow/issues/16046 – alexanoid Feb 28 '23 at 21:14

Vaadin23 vaadin.eagerServerLoad=true and BeforeEnterObserver

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