Helidon Nima - Loom based microservices framework

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" summary

Helidon Nima is a Loom-based microservices server that replaces Helidon’s reactive web layer with a thread-per-request model using Java virtual threads, claiming reactive-level throughput while restoring imperative coding and simpler debugging. Alpha benchmarks (Tekken-style) show Nima close to raw Netty and yield a reported 4x speed boost for Helidon MP vs the old stack; current alpha targets JDK 20 (enable-preview) and will require Java 21. Features: HTTP/1 pipelining, HTTP/2, gRPC prototype, websockets; challenges include thread pinning, avoiding synchronized blocks for IO, and offloading CPU-bound work.

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" chapters (12)

1. 0:00Introduction to Helidon
2. 1:55Framework overview
3. 5:35Concurrency challenges
4. 10:38Reactive programming limitations
5. 13:54Reactive server implementation
6. 16:45Introduction to virtual threads
7. 20:45Nema and imperative coding
8. 22:47Helidon 4 features
9. 26:59Performance benchmarks
10. 30:11Helidon MP transition
11. 35:06Development challenges and tools
12. 41:03Q&A session

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