bndtools 101 - n bartlett
DESCRIPTION
Bndtools is the easy, powerful IDE for developing OSGi bundles and applications. Its powerful features include automated semantic versioning, advanced requirement resolution against repositories, and an extremely fast build-run development lifecycle. As a result, Bndtools is rapidly being adopted by OSGi developers, including the OSGi Alliance itself. However, as with any tool, it can tricky to get started when faced with a completely blank workspace. In this talk, I will walk through an example of building a simple OSGi-based application from scratch using Bndtools. Along the way I will highlight how Bndtools and OSGi work together to ensure that the application is robust, modular and reusable. Bio: Neil Bartlett is a consultant, trainer and developer who has been working with OSGi for nearly 10 years. He is the founder and principal developer of Bndtools, the leading IDE for OSGi. Neil works for Paremus in London.TRANSCRIPT
Bndtools 101Getting Started with OSGi Development
– Many Java Developers
“Why Use OSGi?”
OSGi is From the Future
• Microservices since 1998
• Continuous delivery since 1999
• Software component repositories since 2003
• Runtime resolve/assemble since 2005
image credit: Sam Howzit (flickr.com/photos/aloha75/)
Why Aren’t We All Using It?
• Steep Learning Curve…?
• Complexity…?
• Weak Tools…?
Famous Dude
• “Things should be as simple as possible, but no simpler”
Actually He Said…
• “It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience.”
Inherent vs Accidental Complexity
OSGi Really Is “As Simple as Possible”
Holy Sh*t We Needed Better
Tools!
image credit: Uwe Schwarzbach (flickr.com/photos/uwebkk/)
Bndtools “One tool to bnd them all”
0. Initial Setup
• Create Workspace Config
• Setup Repository
image credit: Germán Poo-Caamaño (flickr.com/photos/gpoo/)
1. Define API
• Blog
• BlogListener
• Baseline
• Release
image credit: Jessica Spengler (flickr.com/photos/wordridden/)
2. Create Provider
• Add blog.api to build path.
• Add MongoDB client from JPM.
3. Run It!
• Add blog.provider to Run Requirements
• Resolve and Run
image credit: Dru Bloomfield (flickr.com/photos/athomeinscottsdale/)
4. Create Consumer
• Add blog.api and servlet 2.5 API to build path
• Publish Servlet service
• Add service property: alias=/blog
• Add HTTP whiteboard & event admin to Run Requirements
image credit: epSos .de (flickr.com/photos/epsos/)
5. Evolve the API
• Add deleteEntry() method to Blog
• Fix the baselining errors
• Release
6. Package and Ship It
• Export as standalone JAR
• Run from bash
image credit: Glyn Lowe Photoworks. (flickr.com/photos/glynlowe/)
What Did We Make?
BlogProvider
BlogConsumer
(REST)
Jetty
HTTPWhiteboard
Blog
Servlet
HttpService
What Did We Make?
• A modular, dynamically assembled, type-safe, versioned microservice.
• … in 45 minutes (give or take)
Over to You
• Bndtools 2.4 M1 Just Released: bndtools.org
• Demo Sources: github.com/bndtools/101
NEW
Thanks!
The Bndtools Team, Working Hard(ly)