Slides of talk given at Spark Conference: Modularity reduces software complexity. In this session we’ll present an OSGi based technology stack that can be used for building scalable and modular web applications in Java with standards such as JAX-RS, dependency injection and websockets. We’ll also show you how HTML5 and JavaScript based frontends can be developed and deployment alongside the backend supporting its modularity.

1. A Scalable Stack for Modular
Web Applications
Gunnar Wagenknecht (@guw)

2. InThis Session
• LEARN what modern server applications need to
feature
• UNDERSTAND Eclipse Gyrex and selected
technologies of this stack
• EXPLORE a web application based on Eclipse
Gyrex

3. Modern Server Application

4. HighTraffic
https://www.flickr.com/photos/davidedamico/

5. Frontends
web, apps & devices
https://www.flickr.com/photos/raffaespo/

6. Modular
development & deployment
https://www.flickr.com/photos/russellstreet/

7. Simple
deployment & operation
https://www.flickr.com/photos/jar0d/

8. Open
technologies & architectures
https://www.flickr.com/photos/roborodent/

9. Eclipse Gyrex

10. A lightweight application stack for building server
applications using EclipseRT technologies.

11. EclipseRT
„EclipseRT is the collection of OSGi-based runtimes
and frameworks built by the Eclipse open source
projects.“
RunTime

12. Equinox
• OSGi reference implementation
• Foundation of EclipseRT
• Component Oriented Development and Assembly

13. Jetty
• Asynchronous HTTP Server and Client
• Standards based Servlet Container
• Web Sockets server
• OSGi, JNDI, JMX, JASPI,AJP support
• Small foot print
• Excellent scalability
• Runs in
• Apache Hadoop and many, many more software
• Google AppEngine

14. Gyrex
• Clustering
• Web-based administration
• Multi-tenancy
• Operational enhancements

15. Gyrex Features
• lightweight application stack
• fast 100% OSGi runtime
• central cluster configuration
through Apache ZooKeeper
• cluster aware job scheduling
• automated deployment through p2
• support for cluster node roles, e.g.“job worker node” and “api node”

16. Gyrex Components
Equinox
Multi-tenant Runtime Cloud
Monitoring Admin
Logging Metrics
Debug/Trace
Web
SSH
Repositories
(JDBC, JPA, NoSQL)
HTTP Applications
(Jetty, OSGi HttpService)
Configuration
Provisioning
Clustering & Coord.
Batch Processing

17. Sample Production Deployment
Load Balancer
Web
App
IoT Device
Native
App
iPad App
Mobile Apps
Web
Node
Web
Node
Web
Node
Web
Node
Web
Node
Web
Node
ZooKeeper Cluster
REST
API
REST
API
REST
API
REST
API
REST
API
Batch
Node
Batch
Node
Batch
Node
Batch
Node
RedisAnsible
KibanaLogstash
Elastic
Search
Jenkins

18. Example Application
https://github.com/eclipseguru/gyrex-timezones-example

19. Q & A
• Gyrex Newsgroup / Forum at
http://www.eclipse.org/forums/
• Information hub at
http://www.eclipse.org/gyrex/
• Session feedback / questions
@guw

20. –Gunnar Wagenknecht
„Thank you!“