The article "Threading and Concurrency" discusses asynchronous processing and parallelization in Java EE with EJB 3.1 (@Asynchronous and timers), Servlets and even with a JCA connector implementation.
NEW: Online Workhop Effective WebApps without Frameworks is also coming to: MUC Airport.
Airport MUC workshops: Web (SPA, PWAs, Offline, Desktop, Mobile) Applications Essentials and Effective Web Applications. No migrations. #usetheplatform
Podcast: airhacks.fm and newsletter: airhacks.news
A book about rethinking Java EE Patterns