Structured Concurrency in Java 21 : Why It Matters and How It Works скачать в хорошем качестве

Structured Concurrency in Java 21 : Why It Matters and How It Works

🚀 Structured Concurrency in Java: Why It Matters & How to Use It 🚀 Traditional concurrency (a.k.a. unstructured concurrency) often leads to problems: ❌ Failures in one task don’t cancel others ❌ Parent task cancellations don’t propagate to subtasks ❌ Wasted time when slow or blocked tasks keep running In this tutorial, I’ll show you *why structured concurrency is needed**, demonstrate these issues with code, and then walk through **Java’s StructuredTaskScope API* (introduced in Java 21 as a preview feature). You’ll see how it simplifies error handling, cancellation, and observability—all while making your concurrent Java code more reliable. 🎓 SPECIAL OFFER: Enroll in my complete Java Virtual Threads & Structured Concurrency with Spring Boot course on Udemy at a discount! Course Link: https://www.udemy.com/course/java-vir... 👉 Explore all my courses with discount links: https://j2eeexpert2015.github.io/lear... 🚨 WANT A COUPON CODE? 📢 Please request via email or Slack as early as possible! 📧 Email: j2eeexpert2015@gmail.com 💬 Slack: https://join.slack.com/t/learningfrom... 🎯 Discounts are not public — they're sent on request only. Act early! WHAT YOU'LL LEARN IN THIS VIDEO: ✅ THE PROBLEM: Witness the chaos of "unstructured concurrency" firsthand. We'll demonstrate three common failure scenarios: Failure in one subtask doesn't cancel the others. Cancellation of a parent task doesn't propagate to its children. A failing task combined with a slow task leads to massive resource and time wastage. ✅ THE SOLUTION: Understand the core principles of Structured Concurrency—treating a group of related concurrent tasks as a single unit of work. ✅ THE StructuredTaskScope API: Learn how to use this powerful Java 21+ preview feature to manage the lifecycle of virtual threads spawned as subtasks. ✅ CANCELLATION POLICIES: Master the two key strategies for managing concurrent tasks: ShutdownOnFailure: If one task fails, cancel all others immediately. Perfect for "all-or-nothing" operations. ShutdownOnSuccess: As soon as one task succeeds, cancel the rest. Ideal for redundant calls or finding the fastest result. ✅ LIVE CODE DEMO: Watch me refactor a fragile, unstructured program into a robust, structured one, solving all the problems we identified. ✅ DEBUGGING & OBSERVABILITY: Learn how to create and analyze thread dumps with jcmd and use your IDE's debugger to inspect the state of your structured tasks. TECHNOLOGIES & CONCEPTS COVERED: Java 21+ Structured Concurrency (Project Loom) Unstructured vs. Structured Concurrency StructuredTaskScope API (fork(), join(), throwIfFailed()) ShutdownOnFailure & ShutdownOnSuccess Policies Virtual Threads Error Handling & Cancellation Propagation Debugging with jcmd and IDE Breakpoints KEY TAKEAWAYS: Structured Concurrency enforces a clear parent-child relationship, binding the lifecycle of subtasks to a defined code block. It eliminates resource leaks by ensuring that all subtasks are completed or cancelled before the main task proceeds. Error handling is simplified: a failure in one task can automatically trigger a clean shutdown of all related tasks. Cancellation is reliable: interrupting the parent scope guarantees interruption of all its children. 📌 *Exclusive Discounts on My Udemy Courses!* 👉 View all my discounted courses here: github.com/j2eeexpert2015/learningfromexperience-courses/blob/main/README.md #java #virtualthreads #structuredconcurrency #springboot #springbootexample