Shortly after the release of Helidon 1.0, Oracle announced Helidon support for GraalVMthat converts Helidon applications to native executable code via the native-imageutility.
Originally named J4C (Java for Cloud) and first introduced in September 2018, Helidonwas designed to be simple and fast, and is comprised of two versions: Helidon SE and Helidon MP. Helidon SE features three core APIs — a web server, configuration, and security — for building microservices-based applications. An application server is not required. Helidon MP MicroProfile 1.2 for building microservices-based applications with the supported MicroProfile APIs.
GraalVM, created by Oracle Labs, is a polyglot virtual machine and platform that may be integrated into Helidon applications. GraalVM is comprised of Graal, a just-in-time compiler written in Java, SubstrateVM, a framework that allows ahead-of-time compilation of Java applications into executable images, and Truffle, an open-source toolkit and API for building language interpreters.
Only Helidon SE applications may take advantage of GraalVM due to the use of reflection in CDI 2.0 (JSR 365), a core MicroProfile API. Therefore, Oracle Labs decided not to include GraalVM support for Helidon MP. Read the complete article here.
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