Develop Java Applications Faster with Spring Roo
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This document discusses Spring Roo, an open source tool that aims to improve Java developer productivity without compromising flexibility. It provides an overview of Roo's mission and capabilities for rapidly generating applications using conventions. Roo uses AspectJ to actively generate code based on annotations and allows customization through add-ons. The document demonstrates Roo's features and explains how applications can later remove their dependency on Roo through refactoring.
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Develop Java Applications Faster with Spring Roo
- 1. Produk've Entwicklung mit Spring Roo Eberhard Wolff SpringSource – A division of VMware
- 2. About Eberhard Wolff • Principal Technologist • Consultant & Trainer • Author (e.g. first German Spring book) • ewolff@vmware.com • TwiGer: @ewolff • Blog: hGp://ewolff.com • hGp://slideshare.net/ewolff
- 4. #1 : J2EE should be easier to use
- 6. How can we make live even easier?
- 7. We need to improve in other areas.
- 8. Build
- 9. Raise the level of abstrac'on
- 10. We mostly create domain models + logic working on it
- 11. Development tool
- 12. Roo
- 13. "Roo's mission is to fundamentally and sustainably improve Java developer productivity without compromising engineering integrity or flexibility" Roo's Mission Statement
- 14. "Roo is a little genie who sits in the background and handles the things I don't want to worry about" End User
- 15. "Roo is a like a text adventures of the 80ies – it even gives you hints!"
- 16. Demo Time!
- 17. You saw… • Domain objects • Finder • MVC support • Web applica'on customiza'on • Embedding TwiGer/Google Docs etc. • I18n • Security • You can add your own code
- 18. Not shown • Database reverse engineering • JSON • GWT support • SOLR support (search) • Spring Web Flow support • SELENIUM web tests • Google App Engine Support
- 19. Roo Benefits • Proven language, tooling, libraries … • No run'me overhead • Can be removed from project (Inter type declara'on push in) • Can also be used from the shell (with vi or Emacs) • Extensions possible
- 20. Roo Infrastructure Implementa'on Overview User's Project .aj .xml .jsp .properties Roo Add-Ons Roo Add-Ons Roo Add-Ons @Roo Annotations provide source only retention .java monitor and change Roo Add-Ons STS Shell
- 21. AspectJ ITDs Ac've Genera'on Person_Roo_ ToString.aj toString():String Person.java name:String write Person_Roo_ JavaBean.aj getName():String setName(String):void readRoo Add-Ons Roo Add-Ons Roo Add-Ons Roo Add-Ons Person.class name:String toString():String getName():String setName(String):void AspectJ Compiler read read writeCompilation unit separation with automated round-trips
- 22. Add ons • May add commands • May add ITDs or other files • Can be ac'vated if changes occur • Metadata events send out
- 23. Removing Roo in Three Steps 1 Use AJDT's “push-‐in refactoring” feature – This moves the Roo .aj content into normal .java files 2 Remove Roo's annota'on JAR from your POM – You can use Roo's “dependency remove” command 3 Remove @Roo* annota'ons from .java files – Use a regular exp find/replace in Eclipse for speed • You can s'll use Roo on the project again – Its “hands off by default” will ensure it's problem-‐free
- 26. Full visibility in the performance for each Request
- 27. Spring Beans, Transac'ons, SQL, HTTP …
- 28. 2 Steps
- 29. #1 Deploy applica'on on tc Server developer edi'on
- 30. #2 Go to localhost:8080/insight
- 31. Demo Time! hGp://www.youtube.com/ watch?v=P_EskssNDU8
- 32. How it fits in our strategy
- 33. A division of VMware Lightweight App Run'me Virtual App Environment Hybrid Cloud Spring tc Server VM Spring tc Server Lightweight App Framework
- 34. Conclusion • Roo is based on established technologies • Spring, AspectJ, JPA… • ITDs separate clearly generated from non-‐ generated code • Tackles build, development tool etc • Flexible architecture: You can add your own add ons • And: Spring Insight can be used for performance op'miza'on of Spring Apps
- 35. The Approach Revisited • You do the domain model – Roo does the rest • Opinionated: Sensible defaults • No lock in – Source level annota'ons – Push In refactoring can be used to eliminate Roo • You have nothing to loose – much to gain!