Workshop where you will learn how to build Microservices with Jakarta EE and MicroProfile, focussing on the various runtimes and integration with Docker.

1. EclipseCon 2019
Tutorial session:
Building Microservices
with Jakarta EE
& MicroProfile

2. Talip Ozkeles
Java (EE) Developer
IT Consultant
Conference Speaker
@tozkeles
group9.nl

3. Ivo Woltring
Codesmith
Software Architect
Conference Speaker
@ivonet
ivonet.nl

4. Edwin Derks
Java (EE) Developer
Software Architect
Conference Speaker
@edwinderks
cloudnativesolutions.guru

5. Tutorial Session
Prerequisites
This URL redirects to the Github
page containing the tutorial
assignments:
http://ivo2u.nl/oA
Follow these instructions to setup
your device for the tutorial:
http://ivo2u.nl/oc

6. Photo by Mikes Photos from Pexels

7. What are Jakarta EE and
MicroProfile exactly?

8. Photo by Inge Wallumrød from Pexels
This tutorial will focus on:
- Vendors and Portability
- Various Runtimes
- Efficient development

9. Photo by David Dibert from Pexels
- Ship with Docker
- Running in a cloud-
native environment

10. Evolution of Java EE and Spring
1990’s now()
?CLOUDVirtualize
Hardware

11. Feature-rich platform of API’s for building enterprise applications
Jakarta EE in a nutshell...
- Profiles
- Full
- Web
- Enterprise Development APIs
- JSP
- JSF
- EJB
- CDI
- JAX-RS
- JPA
- ...many others

12. Designed for building and running scalable applications
Microprofile in a nutshell...
- Java EE / Jakarta EE 8 base (CDI, JSON-P, JAX-RS)
- Microservice APIs
- Healthcheck
- Fault Tolerance
- Metrics
- Config
- Tracing
- Rest Client
- JWT
- …others

13. Photo by Miguel Á. Padriñán from Pexels
Uber / Fat
JARApplication
Server
Hollow
JAR
+

14. Power of the
Application Server

15. Examples of Application Server Vendors
Community
Edition
&
Production
Supported
Community
Edition
Community
Edition
Production
Supported

16. Jakarta EE & MicroProfile
compliant
Application Server
WAR / EAR
Java
● Runs with Java
version
supported by
the server
Conventional application server runtime
<dependency>
<groupId>jakarta.platform</groupId>
<artifactId>jakarta.jakartaee-api</artifactId>
<version>8.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.microprofile</groupId>
<artifactId>microprofile</artifactId>
<version>2.2</version>
<type>pom</type>
</dependency>
● One complete package providing Jakarta EE
● What you see is what you get
● Thoroughly tested by vendor
● Easily patched and upgraded
● Enables portability for enterprise applications

17. Photo by Tom Fisk from Pexels
Application Server
Runtime: Hollow JAR

18. Application server runtime provided as Hollow JAR
Java
● Runs with Java
version
supported by
the server
JAR
WAR
● Applications server as one single artifact
● Little to no operational management tools
● Don’t include the whole application server
with every build of your application
● “Just enough app server”

19. Photo by Tom Fisk from Pexels
Application Server
Runtime: Uber JAR

20. Application server runtime provided as Uber JAR
Java
● Runs with Java
version
supported by
the server
JAR
Compiled Java Bytecode
● One single artifact
● Little to no operational management tools
● Contains your code and application server
● Opposite of lean and tidy, so bigger in size
● “Just enough app server”

21. JDK 8+ Platform
Choose the fitting Java version for your application server runtime
JVM
JAR
WAR
EARCOMPILES
RUNS
IMPLEMENT
Runtime
8
5.193
2.2
HOTSPOT
DEPLOYS

22. Photo by David Dibert from Pexels
But in the end
Docker
… does it even
matter?

23. Shipping and deploying with Docker
Docker Image
Choose
your
runtime
Java
JAR/WAR/EAR
Operational
Environment
● Use docker-compose
● Ship anywhere
● Run anywhere
Docker Image
Choose
your
runtime
Java
JAR/WAR/EAR

24. Photo by Dana Tentis from Pexels
Workshop: Quote of the Day App

25. Workshop: Quote of the Day App

26. WAR / EAR
Java11
Java8
JAR
W
A
R
Java11
JAR
Compiled Java
Docker Image
Payara
Server
Java11
WAR
Docker Image
Payara
Micro
Java8
WAR
Docker Image
Java11
Uber
JAR
application-server-project uber-jar-project
Quotes
- JAX-RS
- MicroProfile RestClient
- MicroProfile FaultTolerance:
- Retry, Fallback,
Timeout
- JSF + PrimeFaces
- CDI
- MicroProfile RestClient
- JAX-RS
- CDI
- JPA
- JSON-B
hollow-jar-project

27. Docker Image
Payara
Server
Java11
WAR
Docker Image
Payara
Micro
Java8
WAR
Docker Image
Java11
Uber
JAR
- JAX-RS
- MicroProfile RestClient
- MicroProfile FaultTolerance:
- Retry, Fallback,
Timeout
- JSF + PrimeFaces
- CDI
- MicroProfile RestClient
- JAX-RS
- CDI
- JPA
- JSON-B
- health
Quotes

28. Tutorial Session
Prerequisites
This URL redirects to the Github
page containing the tutorial
assignments:
http://ivo2u.nl/oA
Follow these instructions to setup
your device for the tutorial:
http://ivo2u.nl/oc
...but let’s have a short break first!

29. Tutorial Bonus Assignments
Further exploration of possibilities
Jakarta EE
- Play around with flaky behaviour
- Modify/Add Quotes
- Explore JSF
- https://www.primefaces.org/showcase/
- Add Exception handling
- Choose different component for
displaying Quotes
MicroProfile
MicroProfile Fault Tolerance:
● Use @CircuitBreaker in hollow-jar-
project
MicroProfile Metrics:
● Add @Counted
● Add @Metered
MicroProfile Health:
● Create a custom HealthCheck
Tips: https://start.microprofile.io

30. Thank you for your visiting this tutorial
We value your feedback
@edwinderks
cloudnativesolutions.guru
@ivonet
ivonet.nl
@tozkeles
talip.ozkeles@group9.nl