The document discusses different technologies for creating modular applications, focusing on Spring Boot. It provides an overview of Spring Boot's architecture and lifecycle, then demonstrates how to structure a modular application using Spring Boot with a core module and other feature-specific modules. The presentation includes diagrams of the Spring Boot architecture and a sample module structure. It concludes with links to additional Spring Boot resources and a call for questions.

1. www.luxoft.com
Creating modular application using
Spring Boot
Konstantin Markovich

2. www.luxoft.com
Agenda

3. www.luxoft.com
Agenda
 Review of available technologies
 Spring Boot overview
 Let’s start!
 Links
 Q&A

4. www.luxoft.com
Review of available technologies

5. www.luxoft.com
OSGI

6. www.luxoft.com
OSGI
 Pros
- Is a specification with multiple
implementations
- Separate classloaders
- “Hot” redeployment of bundles
- Cross-bundle interaction
- Resources export and import
 Cons
- Difficult configuration and debug
- Weak support of Spring framework
- Some issues with bundle cache
- Bundle-wrappers for shared libraries

7. www.luxoft.com
Custom solution

8. www.luxoft.com
Custom solution
 Pros
- You can implement all of your fantasies
 Cons
- Time and resources for implementation and
maintenance

9. www.luxoft.com
Project Jigsaw

10. www.luxoft.com
Spring Boot

11. www.luxoft.com
Spring Boot
 Pros
- Full support of Spring framework
- Easy to configure
- A lot of “starters”
 Cons
- Flat classloader
- “Hot” redeployment only for development
- Is not a standard
- Ability to make a JAR-hell

12. www.luxoft.com
Spring Boot overview

13. www.luxoft.com
Spring Boot architecture

14. www.luxoft.com
Spring Boot lifecycle. Part 1

15. www.luxoft.com
Spring Boot lifecycle. Part 2

16. www.luxoft.com
Spring Boot lifecycle. Part 3

17. www.luxoft.com
Let’s start!

18. www.luxoft.com
Application structure
Core (Spring
Boot starters)
API
Main
Module
Main
service
Item
service
Mock DAO
[other DAO]
[Order
module]
Order
service
Mock DAO
[other DAO]
[About
module]
[other module]

19. www.luxoft.com
Module example

20. www.luxoft.com
Basic classes diagram

21. www.luxoft.com
Page Controller

22. www.luxoft.com
Configuration

23. www.luxoft.com
Controller

24. www.luxoft.com
Links
• http://projects.spring.io/spring-boot/ - Spring Boot project page
• https://start.spring.io/ - Spring Initializr
• https://comsysto.com/blog-post/spring-boot - wonderful article about Spring Boot
• https://geowarin.github.io/understanding-spring-boot.html - another one wonderful article
• https://github.com/kvmarkovich/SpringBootModularity - Demonstration project sources

25. www.luxoft.com
Q&A

26. www.luxoft.com
THANK YOU
Konstantin Markovich
kvmarkovich@gmail.com
skype:markos_dp_ua