Presentation on theme: "Collaboration tools: The CHEF and Sakai Projects Charles Severance University of Michigan."— Presentation transcript:
Collaboration tools: The CHEF and Sakai Projects Charles Severance University of Michigan
Goals Briefly cover our open source learning management and collaborative systems Focus on our Open Source experiences in these projects
Outline Collaborative Activities at UM CHEF Technology CHEF Features CHEF Status The Sakai Project Sakai Technologies Sakai Timeline
UM SPARC Science of Collaboratories Sakai Worktools (Notes Based)WTNG Coursetools (Notes Based) CTNGCHEF 1CHEF 2 NMI Grid Portal NEESGrid
SPARC 2/ users 800 data sources
CourseTools Michigan’s Coursetools has 42,000 users (2003) Indiana University’s OnCourse has users
WorkTools Over 9000 users (2000 active) at the end of 2003
Digital libraries & documents groups-to- information groups-to- facilities people-to-people Communication, Collaboration Services Distributed, media-rich information technology Remote instruments Science of Collaboratories NSF Funded.
CHEF 1.0 Fall 2001: CHEF Development begins –Generalized extensible framework for building collaboratories –“Best-of” CourseTools, SPARC, WorkTools Integrate across projects and adopt relevant standards Funded internally at UM as replacement for CourseTools All JAVA - Open Source –Jakarta Jetspeed Portal –Jakarta Tomcat Servlet Container –Jakarta Turbine Service Container Build community of developers through workshops and outreach
CHEF Technology Provide a mechanism for software development which will allow organizations to share and re-use each other’s work Utilize existing technologies wherever possible and add value rather than invent all new Enable code reuse across multiple organizations Lead to portal technology - Jetspeed
Not “just” a portal Portals are a framework to deploy tools (aka rectangles) and focus on how the user wants to arrange their own “rectangles” While CHEF technically is a portal, the goal is for the tools to work together closely and seem to really be parts of a larger “tool” CHEF has a lot of features, (services, presence, notification, etc..) which bridge the gap between portal and application framework
CHEF Implementation Architecture - More Detail Tomcat Servlet Container Jetspeed Portal Turbine Framework Tool Turbine Service Velocity CSS Turbine Service Turbine Service Servlet In addition to Jetspeed, CHEF operates within a Servlet container called Jakarta Tomcat. Whereas portlets operate in one “recatangle” which is a subset of the screen, Servlets control the entire HTTP response or even talk non-HTTP protocols.
Example Architecture - Resources Tomcat Servlet Container Jetspeed Portal Turbine Resource Tool Security Service Velocity CSS Content Service User Dir. Service Access Servlet src/java/org/chefproject/actions/ResourceAction.java src/vm/chef_resources_show.vm (plus 10 more) src/java/org/chefproject/service/component/BaseContentService.java src/java/org/chefproject/service/component/BaseUserDirectoryService.java src/java/org/chefproject/service/component/ChefSecurity.java src/java/org/chefproject/servlet/ChefdavServlet.java src/java/org/chefproject/servlet/AccessServlet.java HTTP Webdav Servlet WEBDAV
PERL-GridPort Teamlets: Grid Service API CHEF Grid Service Component UserDirectory CHEF UserDirectory Service Component Grid UserDirectory Provider Service UserDirectory Provider NEES Teamlet OGSA Existing CHEFUM Code Existing GRID IU Portlets LDAP GridFTP Proxy Jetspeed User Jakarta IU Code Jetspeed Login COGs MyProxy Perl-CGI Apache UT Code Credentials CHEF Architecture Flexibility: NMI
CHEF - More tools Course Management –Assignments –Drop Box Worktools –Data Viewers (Live/Stored) –Telepresense –Video as Data –Electronic Notebook Grid Technologies –Grid sign on using myproxy –Grid computational portal –GridFTP –..Many more
CHEF Applications CourseTools Next Generation WorkTools Next Generation NEESGrid NSF National Middleware Grid Portal
CourseTools Next Generation Over 5000 users at the end of 2003
Worktools Next Generation New WorkTools Sites being created in WTNG as of 12/2003 Run on the same servers as CTNG.
NEESGrid - The Equipment Network for Earthquake Engineering Simulation NSF Funded. NCSA, ANL, USC/ISI, UM, USC, Berkeley, MSU
CHEF Status CHEF is stable and released –CHEF 1.2 from –Workshops twice per year –Technical support mailing list –Collaborative site chefproject.org/chef/ Other derived variants of CHEF –NMI 1.0 Beta from –NEESGrid 2.1 from
What is Next: SAKAI U Michigan, Indiana U, MIT, Stanford, uPortal –All have built portals / course management systems –JSR-168 portlet standard requires us all to re-tool and look at new approach to portals Course Management System Standards –Open Knowledge Iniative (OKI) needed full implementation –IMS standard such as Question and Testing Interoperability (QTI) –SCORM Course Content Standard Why not coordinate this work, do the work once, and share each others solutions? Integrate across projects and adopt relevant standards Collaboration at the next frontier - implementation Tool Portability Profile (TPP) –Truly portable tools and services –Tools built at different places look and feel the same and share data and services –This is difficult - Interoperability is harder than portability Mellon Foundation funding
Sakai Organization To some, the real innovation is the organization To get these schools/institutions to adopt a central authority (Sakai Board) for resource allocation of internal as well as grant resources Goes beyond resources from grant Required for closely coupled open source development, the ‘seed’ software? Part of the open source experimentation
Board Joseph Hardin, UM, Chair & Project Manager Brad Wheeler, IU, Vice Chair Jeff Merriman, MIT-OKI Amitava ’Babi’ Mitra, MIT- AMPS Carl Jacobson -JASIG Lois Brooks, Stanford Technical Coord. Committee Chair Chuck Severance Local Teams Tools Rob Lowden Architecture Glenn Golden Local Members Indiana Univ. U of MichiganMITStanforduPortalIndiana Univ.U of MichiganMIT Stanford uPortal
Open/Open Licensing “..all work products under the scope of the Sakai initiative for which a member is counting matching contribution and any Mellon Sakai funding” will be open source software and documentation licensed for both education and commercial use without licensing fees. Significant difference between a “product” and a “component” Unlimited redistribution is an important aspect of a license.
Jan 04 July 04May 05 Michigan CHEF Framework CourseTools WorkTools Indiana Navigo Assessment Eden Workflow Oncourse MIT Stellar Stanford CourseWork Assessment OKI OSIDs uPortal SAKAI 1.0 Release Tool Portability Profile Framework Services-based Portal Refined OSIDs & implementations SAKAI Tools Complete CMS Assessment SAKAI 2.0 Release Tool Portability Profile Framework Services-based Portal SAKAI Tools Complete CMS Assessment Workflow Research Tools Authoring Tools Primary SAKAI Activity Architecting for JSR-168 Portlets, Refactoring “best of” features for tools Conforming tools to Tool Portability Profile Primary SAKAI Activity Refining SAKAI Framework, Tuning and conforming additional tools Intensive community building/training Activity: Ongoing implementation work at local institution… Dec 05 Activity: Maintenance & Transition from a project to a community SAKAI Overview
Portability Profile (as of today) Tools –JSF or XUL GUI Layer –JSR 168 Portlet –JSR Servlet Standard Services –Level 1-3 Inversion of Control –Avalon, Turbine, OKI, Spring, Pico J2EE / EJB / Jboss - Enterprise Services –Stateless Session –Entity beans for clustering and scaling This is in progress
Sakai Timeline Dec 15 SAKAI 1.0 Whitepaper Pre-alpha release of SAKAI’d CHEF Architect Discussions: getting it right across schools Oct ‘03Oct ‘04Jan ‘04Apr ‘04July ‘04 Architecture and Tool Development Tool Development July 1 SAKAI 1.0 available for testing by production facilities Feb 15 SAKAI 0.5 available for tool development July 1 Final tool delivery to participating schools Feb 1 Deliver full spec to programmers Feb 15 Developers’ Workshop: Coding SAKAI 1.0 using SAKAI 0.05 Nov 15 Requirements, Functional Design, UI, Full Spec Aug 1 Tools running in SAKAI 1.0 pilot/production environment at participating schools
CHEF Project Personnel Michelle Bejian Lotia Jim Eng Richard Ellis Glenn Golden David Haines Joseph Hardin John Johnston Louis King Dan Kiskis Peter Knoop John Leasia Hans Masing Brett Miller Daphne Ogle Diana Perpich Zhen Qian Hannah Reeves Marco Rocco Lars Schumann Charles Severance Gonzalo Silverio Joanne Yuanyuan Sui Stephanie Teasley Terry Weymouth David Whitehead Elizabeth Wilson
Summary Points In the long term, thinking about a learning management system as a product is too limiting –Campus Portal –Learning Management –Collaborative activity in large and small groups There are three phases of Open Source Development - it is hard to skip them –Adopt and tinker –Build your own, “sell it”, and recruit users and helpers (influenced by the late 1990’s in the US) –Become part of something larger - release control to group - truly collaborative development - Easier when you have “won” in the previous step and it was not as fun as you thought… We must get beyond the notion that we are building a self-contained “product” and really we are building parts of an overall solution that others will reuse in ways we cannot imagine Open source development is not preparation for an IPO Measure success when something that someone else develops extends *your* software. In many ways Open Source Development is like Research - combination of a set of very deep skills where the value is in the aggregation of the skills rather than one individual.