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1 © 2005 JGS goodsolutions GmbH OLAT - Online Learning And Training OLAT Development Framework Better than Struts, more than JSF for JUGS Felix Jost, Dezember.

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Presentation on theme: "1 © 2005 JGS goodsolutions GmbH OLAT - Online Learning And Training OLAT Development Framework Better than Struts, more than JSF for JUGS Felix Jost, Dezember."— Presentation transcript:

1 1 © 2005 JGS goodsolutions GmbH OLAT - Online Learning And Training OLAT Development Framework Better than Struts, more than JSF for JUGS Felix Jost, Dezember 2005 JGS goodsolutions GmbH

2 2 © 2005 JGS goodsolutions GmbH Agenda What is OLAT Why build an own framework? Live-Programming-Demo Lessons learned in three years The future, Questions & Answers, Discussion

3 3 © 2005 JGS goodsolutions GmbH What is OLAT Strategic Learning Management System of the University of Zürich Used by about 11 Universities and about 8 Fachhochschulen

4 4 © 2005 JGS goodsolutions GmbH OLAT Development I 1.x Prototyp phase –Projectstart Spring 1999 –Developed für Veranstaltung Einführung in Informatik I at IfI –PHP, PHPLib, MySQL (LAMP) 2.x Migration phase –Start Java Rebuild 2002 –Release 2.0 Frühjahr 2003 –New Java Framework + new Java Code + old PHP Funktionality

5 5 © 2005 JGS goodsolutions GmbH OLAT Development II 3.x New Softwarearchitecture –Release 3.0 Sommer 2004 –100% pure Java –Clean component based Architecture –Simple but efficient Development-Framework –Built to scale (Campus-Size LMS) –Multilingual (de,fr,it,en,...), UTF-8 4.x (Current System) –Konsolidating Framework, Extension Points (Spring FW) –About 1400 Java classes –Creation of JGS goodsolutions GmbH (official Uni ZH Spin off) –A growing open source community

6 6 © 2005 JGS goodsolutions GmbH OLAT Buzzwords Content IMS Content Packaging IMS Question & Test Interoperability (QTI) Technical Shibboleth (AAI) HTML 4.01 Transitional CSS JavaScript XML Kommunication WebDAV HTTP RSS Jabber IM Client / Server ELML MySQLLinux Java J2EE Hibernate Velocity Ant Development Docbook SSL UTF-8 Bugzilla CVS jUnit OpenSource WYSIWYG Eclipse XStream SCORM MVC

7 7 © 2005 JGS goodsolutions GmbH Own Framework 2003 –Jpublish and Templates (good for a CMS) –There was Struts, no JSF: but simple page flows –Existing good systems are not open source End of 2003: Crisis and parallel development Today: like Java Server Faces, but much more This speech focuses on the GUI-Part of the framework More conzepts and code for –Message Bus –RSS, WebDAV –own Virtual File System (VFS) –...

8 8 © 2005 JGS goodsolutions GmbH OLAT Software Architecture

9 9 © 2005 JGS goodsolutions GmbH Design decisions We wanted to have –Fun while developing (quick development, but still control) –Swing like coding (no URLs, no state worries, no Req/Res) –Easy to debug (events, clear resposibilities, no bytecode- manipulation) –Good look and feel (CSS, Usability guidelines) What we did –Look und Feel mit CSS –Program swing-like with Windows, Panels, Layouts, Forms, Tables,... –Event-based: event -> dispatch -> rerender –Layouter have their own files (HTML-Fragments) –Language Translators have their own online tool –Business workflows are reusable!

10 10 © 2005 JGS goodsolutions GmbH OLAT System Architecture Java API XML xStreamsHibernate / JDBCJ2EE Servlet API Data Managers GUI Elements Generic Controllers WebDAV, RSS, Mail HomeGroups RepositoryCourse IMS CPIMS QTIFileCourse IMS CPIMS QTI ForrumGroups OLAT Framework OLAT Application Libraries SCORM

11 11 © 2005 JGS goodsolutions GmbH Development framework

12 12 © 2005 JGS goodsolutions GmbH GUI Elements

13 13 © 2005 JGS goodsolutions GmbH Live Demo Develop some tasks the customer group set us Adapt to changing workflows –no, the form comes here!.. –we need a confirmation dialog here Even do the english translation and some look and feel!

14 14 © 2005 JGS goodsolutions GmbH Lessons learned A CMS Framework can never make a LMS Do not underestimate migration issues People first need to know that they are using a webapplication, not a website Always use or develop a good framework You cannot be a product manager -and- an architect guy

15 15 © 2005 JGS goodsolutions GmbH The future LMS Features: Release 4.1, see ww.olat.orgww.olat.org Technical Features: AJAX Integration –Don't hype too much (WEB 2.0?!?) –Drag & Drop C/S –Component reload for faster navigation –Server push (e.g. Chat, shared screens etc) More flexible layouting of forms...???

16 16 © 2005 JGS goodsolutions GmbH Develop with us ww.olat.org Open Source Homepageww.olat.org –About 20 downloads per day –3-4 posts a day on the mailinglists –Technical documentation online

17 17 © 2005 JGS goodsolutions GmbH JGS goodsolutions GmbH Winterthurerstrasse 190 CH-8057 Zürich +41 (0)43 544 09 49 http://www.goodsolutions.ch nfo@goodsolutionsh OLAT Open Source Projekt, Mailingliste für Anwender und Entwickler ttp://www.latorg http://lists.olat.org Contact


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