Building Cloud-Native Applications with Helidon

Building Cloud Native
Applications with Helidon
Dmitry Kornilov
Senior Software Development Manager
Oracle

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.
Statements in this presentation relating to Oracle’s future plans, expectations, beliefs, intentions and prospects
are “forward-looking statements” and are subject to material risks and uncertainties. A detailed discussion of
these factors and other risks that affect our business is contained in Oracle’s Securities and Exchange
Commission (SEC) filings, including our most recent reports on Form 10-K and Form 10-Q under the heading
“Risk Factors.”These filings are available on the SEC’s website or on Oracle’s website
at http://www.oracle.com/investor. All information in this presentation is current as of September 2019 and
Oracle undertakes no duty to update any statement in light of new information or future events.
Safe Harbor
Copyright © 2019 Oracle and/or its affiliates.

Dmitry Kornilov
HelidonTeam
Oracle

Agenda
• Helidon Introduction
• Helidon SE and Helidon MP
• Customer Story:Tele2 (Sweden)
• Q & A

Helidon (Χελιδόνι) = Swallow (Greek)

A set of Java libraries
for developing microservices

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

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

Supported Active Project
• 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
• Management has committed to commercial support of Helidon
• AnyWebLogic licensed customer is automatically supported for
Helidon use

Landscape

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

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";
}
}

Helidon Architecture
Helidon MP
Helidon SE
Extensions

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

Startup Time
Information source
Lower is better

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

GraalVM
• 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)

MicroProfile
• 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

Helidon MP supports the latest
MicroProfile 3.0

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

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

Helidon-related Sessions on CodeOne 2019
Thursday, Sep 19
09:00 AM - 09:45 AM Helidon MicroProfile: Managing Persistence with JPA
Moscone South - Room 206
Migrating a Single MonolithicApplication to Microservices
Moscone South - Room 204
12:15 PM - 01:00 PM

ThankYou
Dmitry Kornilov
Oracle

A Customer Experience
HELIDON.IO
Oracle Open World - 2019

• System Developer since 1993
• Java since 1998 (v 1.2)
• Certified Lead Developer - 2012
• Certified IT Architect – 2016
• Third OOW. First presenting!
• Tele2 – BSS (BAAM)
• Lead Developer / System Architect
• REST (Representational State Transfer)
• JAX-RS (JSR 311 & JSR 339) – Jersey - 4
years
• Microservices – Spring Boot – 3 years
Johan Palmer

We fearlessly liberate people to live a more connected life
THIS IS TELE2
Corporate Communications, August 2019

28
The Tele2 Group
10.3
Million
Customers
HQ
Sweden
5+1
Markets
and IoT
A Baltic Sea Challenger focused on Sweden, Estonia, Latvia and Lithuania.
Tele2 also operates in Germany and provides IoT solutions globally.
5.2
Thousands
Employees

29
OUR PURPOSE
We fearlessly liberate
people to live a more
connected life
We are becoming a truly integrated challenger with
seamlessly combined offerings to consumers and
businesses
Our core capabilities enable us to win
Responsible Challenger Most Reliable NetworkWinning People & Culture
Mobile Fixed TV
Integrity &
Security
IoT
Customer
Focus
Operational
Excellence

• Meetup in Stockholm in April - DiscoTech, By Oracle
• Helidon presentation for Tele2
• Documentation, community (slack channel)
• Open source, https://github.com/oracle/helidon.git
• Simple and fast (Pure java, web core by Netty)
• MicroProfile Support (JAX-RS, CDI)
• Reactive WebServer (Reactive Streams, Netty)
• Observable and Resilient (Config, Health Checks, Metrics, Tracing, …)
Why helidon.io?

• Challenge existing way of working & technologies
• Microservices implementation agnostic
• Power to the teams
• Current system environment – How will it fit?
Challenger

• Microservice architecture - Spring Boot (Embedded Tomcat, Similar to JAX-RS)
• Monitoring:
• Actuator
• Health checks, Metrics, Info, etc.
• Spring Boot Admin
• Logging - Elasticsearch, Logstash, and Kibana
• Version control: Git (GitLab)
• Project management: maven
• Continuous Integration and Delivery: Jenkins
• Deployment: VM, DockerEE, Kubernetes
 Helidon fits within the current frame
Tele2 – System Environment

• Real business case
• Make production ready
POC (Proof of Concept)/Project

• External Campaign Service sends offers by email to our customers.
• Up to one million emails sent per day.
• Visible on MyPages - tele2.com
• Visible from Customer Service application
 Shared view of customer communication.
 Simplify customer service work and shorten queue time.
Business Case

High Level Design

• Two main processes identified
• Import process
• View process (list, view)
POC / Project - Processes

Import Process Flow

External Campaign Service
campaign service
User
customerId_Id.zip
Zip
customerId_Id.pdf
customerId_Id.json
p d f
json
Disk: /../../..

document-inbound-service
• Spring Boot 2.1.7
• Apache Camel 2.24.0
• Oracle AQ (Apache ActiveMQ)
document-inbound-service
customerId_id.zip
queue

document-handler-service
• Spring Boot 2.1.7
• Apache Camel 2.24.0
• http multipart request to document-storage-service
http multipartdocument-handler-service
customerId_id.zip
queue document-storage-service
json
pdf
Extract

• Helidon SE
• Reactive Streams Java Driver
• MongoDB
document-storage-service
Reactive
Streams
Driver
DB
REST

document-storage-service – REST API
Request parameter owner=“userId” required on all requests

View Process Flow

• Helidon MP
• Angular - Static content
• REST API - @Path("/api/...")
• Integrates with document-storage-service (upload, list, view, delete)
document-storage-application
DB
User
API
UI
Helidon MP Helidon SE

• mvn archetype helidon-quickstart-mp
• pom.xml, microprofile-config.properties, Dockerfile, logging.properties, Sample endpoint
• JAX-RS – Jersey
• @Annotations
• CDI -Contexts and Dependency Injection
• multipart/form-data
• Rest client - WebTarget - javax.ws.rs.client.WebTarget
• Config - Yaml, System property -Denvironment="prod”
• Health Checks - /health
• Metrics - /metrics
• OpenApi - /openapi – yaml through @
• Static content Support – Angular
Helidon MP

• mvn archetype helidon-quickstart-se
• Pom.xml, application.yaml, Dockerfile, logging.properties , Sample endpoint
• Config - Yaml, System property -Denvironment="prod”
• Health Checks - /health
• Metrics - /metrics
• OpenApi - /openapi – implements OASModelReader
• multipart/form-data (meta & document) - org.jvnet.mimepull
• Reactive Streams
• MongoDB Reactive Streams Java Driver
Helidon SE

• Easy to get started - Documentation, archetype, …
• Easy to use (mvn, IDE)
• Great fit with our current environment. Based on known techniques.
• Jar …
• Small footprint & high performance
• 37K / 1,1 sec
• MP/SE trade off
• Take one thing at the time (MP/SE/Reactive/DB)
• Real business case
• Challenge existing way of working / technologies
Summary

THANK YOU!
Thanks Oracle & Helidon!
LinkedIn: www.linkedin.com/in/mrjohanpalmer
Twitter: @mrjohanpalmer
Email: Johan.a.palmer@tele2.com

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