Save Session State Between Redeploys - Developing on WildFly

When developing, it is often convenient to save session state between redeploys or server restarts. To enable this feature in WildFly 8 you need to add the persistent-sessions element to your configuration file (within the undertow subsystem).

<servlet-container name="default">
    <persistent-sessions path="session" relative-to="jboss.server.temp.dir"/>
    <jsp-config/>
</servlet-container>

By specifying the relative-to attribute, the session will only be persistent across redeploys and not across server restarts.

This feature works in WildFly 8.2.0.CR1 and greater.

You can also achieve session passivation, when you are using a non-ha profile, by adding <distributable/> to your web.xml (for those using WildFly 8.1.0 or less).