Java containers appeared back in the era of big expensive hardware and monolithic applications, and currently feel like an impediment to Java progress. More and more developers opt out of containers in favor of runnable jars, especially with the advance of microservices architectures. Andrus Adamchik will present a new open source tool called Bootique (https://bootique.io), a pluggable and extensible technology intended for various kinds of container-less Java apps – REST services, webapps, job runners, desktop apps and what not.

1. No Container
a Modern Java Stack with Bootique
by Andrus Adamchik
@andrus_a

2. About Me
• Member and VP of the Apache Software Foundation.
• Run a company called ObjectStyle.
• Develop open source technologies: ORM, dependency injection,
REST, no-container.

3. –Anonymous Java Programmer
“I use Java at work all the time, but I prefer Node.js for my own
projects.”
Java Paradox

4. Evolution of Java*
• 1998: Write a runnable app.
• 2001: Write a container web app with JSP/EJB.
• 2004: Write a container web app without JSP/EJB.
• 2010: Write a container web app without web.xml.
• 2016: Write a runnable web app without container.
* Disclaimer: light sarcasm and oversimplification

5. Container Inversion
• App as an all-inclusive .jar.
• Former container parts are included as libraries.
• App is runnable and owns its main() method.

6. #WYSIWYR: What You See Is What You
Run
• Another way of saying "get off container and reclaim your main()
method".

7. Bootique
Minimally opinionated app launcher and integration technology.

8. Brief History
• First commit in December 2015.
• Collaboration between ObjectStyle and National Hockey League.
• Fully open-source under Apache License.
• Successfully applied in complex enterprise environments.

9. Demo

10. Modules, Configuration,
Commands

11. Modules
• Core
• Cayenne
• Curator (Zookeeper client)
• JDBC
• Jersey
• Jersey Client
• Jetty
• Job
• LinkMove
• LinkRest
• Liquibase
• Logback
• Metrics
• MVC (Mustache)
• Test

12. Configuration

13. Configuration Transformed into Factories

14. Commands (and Options)

15. Testing with JUnit

16. Bootique vs. JavaEE

17. Integration Technology for Java.
WYSIWYR (apps are runnable). Requires container deployment.
Can integrate any 3rd-party modules. Integrates a predefined set of specs.
Unified config for all app parts. Container and apps are configured separately.
Everything is programmable
Container is somewhat programmable, but
YMMV.
Universal Java launcher Specialized opinionated environment.

18. Bootique vs. SpringBoot

19. Integration, WYSIWYR (apps are runnable), extension auto-loading, etc.
Command dispatch feature. All available commands run sequentially.
Guice DI Style: explicit modules, explicit
overrides.
Package-based implicit "modules". Annotations
spread around.
Features can't be turned on by accident. @Conditional built into the core.
Unopinionated Core Opinionated

20. What Apps is it Good for?
• Any web apps you used to write in the past, but also....
• Microservices.
• Apps you distribute to users.
• Cron jobs.
• JavaFX apps.
• Quick prototypes.

21. Questions?
• @BootiqueProject
• http://bootique.io/
• https://github.com/nhl/bootique (don’t forget to it !)