https://dplabs.tech/tags/java-24/ Recent content in Java-24 on dplabs — Software Engineering & Technology Consultancy Hugo en-us Mon, 28 Apr 2025 00:00:00 +0000 https://dplabs.tech/blog/structured-concurrency-java/ Mon, 28 Apr 2025 00:00:00 +0000 https://dplabs.tech/blog/structured-concurrency-java/ <p>Java&rsquo;s concurrency model has been functional for decades. <code>ExecutorService</code>, <code>Future</code>, <code>CompletableFuture</code> — these tools work. They also have a persistent problem: when you submit tasks to an executor, the relationship between the spawning thread and the spawned tasks is not represented in the code. Errors are easy to lose. Cancellation doesn&rsquo;t propagate automatically. Resources leak when tasks outlive their intended scope.</p> <p>Structured concurrency, finalized in Java 24 (JEP 505 after multiple preview rounds), fixes this. The core principle: <strong>concurrent tasks should have lifetimes that are scoped to the block of code that spawned them</strong>, just as <code>try-with-resources</code> scopes resource lifetimes.</p>