External request on application startup

Flow
1

Hi,

each time I start my Vaadin app in my IDE, I get a message from our proxy that a call to async-io.org/version.html has been blocked (this is a pretty restrictive corporate environment).
Is it possible to disable/suppress this call from my app?

Thanks!

2

It seems to be an Atmosphere version check call.
You should be able to disable the version check with the property org.atmosphere.runtime.AtmosphereFramework.analytics=false
See configuration for more details

3

Unfortunately, this didn’t do the trick.

4

Does setting the property in one of the ways mentioned here:

work?

5

Nope. I tried all 3 of them, and also to set it as JVM parameter.

6

Actually, Vaadin seems to prevent that call by default in PushRequestHandler.initAtmosphere()

7

Can you double-check that there are no additional Atmosphere initializations other than the one done by Vaadin?

8

This even happens with a most simple starter app consisting of nothing but the GreetService, or the task list example.

9

Ah! It looks like it is Hilla that registers an additional AtmosphereServlet, but it does not disable analytics.

If your application is pure Flow, you can exclude com.vaadin:hilla from com.vaadin:vaadin-spring-boot-starter.

10

Thanks a lot, this fixed it.

11

For the record, if you don’t want to exclude Hilla, you can add this bean to your application

    @Bean
    BeanPostProcessor disableAtmoshpereAnalytics() {
        return new BeanPostProcessor() {

            @Override
            public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof ServletRegistrationBean<?> reg && beanName.equals("atmosphereServlet")) {
                    reg.getInitParameters().put(ApplicationConfig.ANALYTICS, "false");
                }
                return bean;
            }
        };
    }
12

For the record, this problem will be tracked by Disable analytics for initialized Atmosphere · Issue #4240 · vaadin/hilla · GitHub

1 Like
13

Adding also Simplify Atmosphere configuration customization · Issue #22568 · vaadin/flow · GitHub for the Flow Atmosphere instance configuration

1 Like
14

Just tried the approach and it works great. Running the external request in a background thread during startup keeps the UI responsive, and using UI.access() for updates was the missing piece for me.