~~NOTRANS~~
~~Title: Configuring Timeouts for Vaadin UI~~

A JVx application has custom [[jvx:communication:timeouts|timeouts for master and sub session]]. The timeouts won't work if you use Vaadin UI because a web application uses http session timeout. The [[https://vaadin.com/docs/-/part/framework/application/application-environment.html|Vaadin documentation]] contains information about //Session Timeout After User Inactivity//.

Our //WebApplicationSetup// implementation overrules the session timeout properties of config.xml by setting:

<file java>
launcher.setParameter("Application.connection.timeout", Boolean.FALSE.toString());
launcher.setParameter("Application.subconnection.timeout", Boolean.FALSE.toString());
</file>

If set to false, the timeouts will be set to -1 (infinitly).

This is the default behavior with WebApplicationSetup, but it's also possible to configure custom timeouts for master and sub session by adding the timeout constants:

<file script>
"Application.connection.timeout"
"Application.subconnection.timeout"
</file>

as parameters to the deployment deskriptor (web.xml):

<file xml>
<init-param>
    <param-name>Application.connection.timeout</param-name>
    <!-- 30 minutes -->
    <param-value>30</param-value>
</init-param>
</file>