Helidon is a collection of Java libraries for writing microservices. Helidon offers two programming models: Helidion SE and Helidon MP.

Helidon SE is a compact toolkit that embraces the latest Java SE features: reactive streams, asynchrous and functional programming, and fluent style APIs.

The REST framework for Helidon SE is the Helidon WebServer. It’s built on top of Netty and uses a straight forward request routing API and supports a number of additional Helidon features:

• Config

• Security

• Health

• Metrics

• OpenAPI

• OpenTracing

• JSON-P

• JSON-B

For details see the Helidon documentation and guides.

Helidon SE supports GraalVM native images for small footprint and lightening fast startup. For more information see the Graal native image guide.

Helidon is a collection of libraries that runs on top of Netty. It is not derived from a Java EE application server. That means your cloud native application is compact and efficient without unnecessary overhead or bloat.

Try the Helidon SE quickstart to get your first Helidon SE application up and running in minutes.