Helidon is a set of Java libraries for building cloud-native microservices. It includes Helidon SE, which provides a lightweight microservices framework, and Helidon MP, which implements the MicroProfile specifications. The presentation covered what Helidon is, its open source nature, components of Helidon SE and MP, performance benchmarks, and roadmap plans including upcoming support for MicroProfile 3.0, Hibernate, HTTP/2 and more.

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Building Cloud-Native
Microservices with
project Helidon
Dmitry Kornilov / Tomas Langer
10 Sep 2019

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Dmitry Kornilov
@m0mus
Helidon Project Lead
Tomas Langer
@langer_tomas
Helidon Architect

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AGENDA
3
What is Helidon?
Helidon SE and Helidon MP
Roadmap and Plans
Demo

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Safe Harbor Statement
The following is intended to outline our general product direction.
It is intended for information purposes only and may not be
incorporated into any contract. It is not a commitment to deliver
any material, code,
or functionality and should not be relied upon in making purchasing
decisions. The development, release, timing, and pricing of any
features or functionality described for Oracle’s products may
change and remains at the sole discretion of Oracle Corporation.

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Helidon (Χελιδόνι) = Swallow (Greek)
A set of Java libraries
for developing microservices

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Project Helidon
● Open
● Innovative
● Support standards
● Supported active project

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Open Source
● Hosted on GitHub
○ https://github.com/oracle/helidon
● Apache 2.0 License

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● Open Source support
○ Web Site with guides and tutorials: https://helidon.io
○ Public Slack channel: https://helidon.slack.com
○ GitHub issues tracker:
https://github.com/oracle/helidon/issues
8
Supported Active Project

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Landscape

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Landscape

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● Microframework
● Tiny Footprint
● Functional style
● Reactive
● Transparent
● MicroProfile 2.2
● Small Footprint
● Declarative style
● Dependency Injection
● CDI, JAX-RS, JSON-P/B

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Routing routing = Routing.builder()
.get("/hello", (req, res) ->
res.send("Hello World"))
.build();
WebServer.create(routing)
.start();
@Path("hello")
public class HelloWorld {
@GET
public String hello() {
return "Hello World";
}
}

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Helidon Architecture
Helidon MP
Helidon SE
Extensions

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Helidon SE

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Helidon SE Components
Reactive Web
Server
Config
Security Tracing
Metrics
Health Check gRPC
MP
MP
MP
MP
MP
MP
Helidon DB Client

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Reactive Web Server
● Simple functional routing model
with reactive Flow API
● Inspired by express.js
● Built on Netty
● OpenTracing, Metrics and Health
Checks
● Static content support

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Config
● Flexible, typed config model
● Multiple data sources
● Layering
● Hierarchical model
● Dynamic updates
● Extensible

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Security
● Authentication
● Authorization
● Outbound Security
● Auditing
● Extensible

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● Building native executable for Helidon SE applications
○ Startup time is tens of milliseconds
○ Native executable size is smaller than application + JVM
● Supported profiles:
○ Local build (for the OS installed locally)
○ Docker build (for Linux)

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Performance
Information source

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TechEmpower JSON (reqs/sec)
0
50000
100000
150000
200000
250000
300000
350000
Java SE JVM
Helidon SE Micronaut DropWizard Spring
Higher is better
Data source

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Helidon MP

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Content Slide 2
● Open source community specification for Enterprise Java
microservices
● Hosted at Eclipse Foundation
● Participants:
○ Oracle, IBM, Red Hat, Payara, Tomitribe, Microsoft and others
● 8 releases since 2016
● https://microprofile.io

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Helidon MP Components
MP Config Metrics
Health
Check
Fault
Tolerance
JWT Auth
JAX-RS CDI JSON-P / B
Open API
Open
Tracing
REST Client
SE SE
SE
JPA
gRPC
JTA
SESE SE SE
SE

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Plans

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Roadmap and Plans
Earlier in 2019 Q3 2019
✓ Helidon 1.0
✓ Graal VM support
✓ MicroProfile 2.2
✓ JPA and JTA
✓ gRPC support
• MicroProfile 3.0
• Hibernate Support
✓ UCP Support
Q4 2019+
• More GraalVM support
• HTTP Multipart
• HTTP/2
• Reactive HTTP Client
• Helidon DB Client
• Messaging / Kafka

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Demo

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Thank you!