blog/Project Loom

Topic · 9 posts

Project Loom

Expert guide to Java's Project Loom. Learn virtual threads, structured concurrency, and scoped values to build highly scalable, efficient Java applications. Complete tutorials and best practices.

posts9

first post2025-07-06

latest2025-08-31

total read~152 min

All Structured Concurrency Tail Latency & System Behavior

9 posts

newest first

012025-08-31
Migrating Project Loom Code from Java 21 to Java 25
The Loom migration from Java 21 to Java 25 is one real change plus two cleanups: Joiner-based scopes replace ShutdownOnFailure, scoped values lose the preview flag, and virtual threads stay exactly where you left them.
16 min
022025-08-24
Future Directions and Migration Planning
Loom roadmap planning is mostly a timing problem: adopting preview features too early and waiting until they settle both ship nothing in the end.
15 min
032025-08-17
Production Readiness, Monitoring, and Debugging
Most thread-pool dashboards go quiet once a service moves to virtual threads, because a small carrier count hides millions of virtual threads and high CPU usually means pinning, not business load.
14 min
042025-08-10
Performance Deep Dive
Benchmark numbers for virtual threads versus reactive code disagree wildly because the workload dictates the answer, not the model: I/O-bound code usually benefits, CPU-bound rarely does, and non-blocking moves work without removing it.
12 min
052025-08-03
Advanced Structured Concurrency Patterns
StructuredTaskScope on its own is a parallel-fetch helper, and the resilience policy that makes it usable against a flaky downstream belongs in one handler instead of duplicated at every call site.
12 min
062025-07-27
Structured Concurrency in Practice
Long CompletableFuture chains look fine in code review and painful in incident calls because a failed call leaves its siblings still running, and a structured scope is what cancels them on the way out.
25 min
072025-07-20
Real-World Microservices
A microservice that swaps its executor for virtual threads loses the thread-pool ceiling but gains a different operational surface: orchestrating fan-out cleanly, watching pinning instead of pool depth, and noticing that downstream capacity is now the limit.
28 min
082025-07-13
Building Web Services with Virtual Threads
The reason web servers moved to reactive code was that platform threads cost too much to dedicate one per blocking request, and virtual threads remove that cost without asking the request handler to look any different.
15 min
092025-07-06
Java Virtual Threads: Why They Matter for I/O Scalability
Discover Java's virtual threads revolution with Project Loom. Learn why Java's threading model is changing forever, performance benefits, migration strategies, and real-world implementation examples. Complete guide to lightweight concurrency in Java 21+.
15 min