What's New in Java Concurrency 3.1
summary
Jakarta Concurrency 3.1 runs on Java 17 and Java 21 and adds concrete features: CDI @Inject now supplies ManagedExecutorService, ManagedScheduledExecutorService and ContextService; a new @Schedule annotation repeats async methods on a cron; ContextService gains contextualSubscriber and contextualProcessor to attach application context to Reactive Streams publishers; Virtual Threads are enabled via virtual = true (requires Java 21 plus a runtime that provides them) and a demo runs 100,000 VirtualThreads in 1.88s while platform threads run out of memory; sample app on GitHub.
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