Sakai SEPP Report
Charles Severance
5/21/2004
Observations
• Version 1.0
– Scope has expanded dramatically since January
– There are a lot of “degrees of freedom” / “articulation points” to
manage
– We don’t want to (and cannot) slip deadlines
– We will have to make some tough choices to make deadlines
– Coordination with SEPP is primarily information flow outbound
from the core team.
• Version 2.0 will be much different
– The June meeting is both to talk about 1.0 and build up the 2.0
community.
– Hopefully, by June all of the “degrees of freedom” will be nailed
down and it will be about execution
Timeline Review
• Alpha - 5/15
• Beta - 6/15
• Production - 7/15
Alpha Release
• Much of the current focus is on the
framework in the Alpha release
– Support for Sakai UI components and Java
Server Faces
– OKI OSID Implementations
– Hibernate Object Relational Mapping
– uPortal Integration
Sakai Alpha JSF/UI Components
sakai:button_bar
sakai:group_box
sakai:button_bar_item
sakai:instruction_message
sakai:comment
sakai:panel_edit
sakai:commentII
sakai:tool_bar
sakai:doc_properties
sakai:tool_bar_item
sakai:doc_section
sakai:tool_bar_message
sakai:doc_section_title
sakai:tool_bar_spacer
sakai:flat_list
sakai:view_container
sakai:view_content
OKI OSID Implementations
• Aligned with the upcoming OKI release
• Sakai APIs will be a superset of the OKI APIs
Pure OKI Tools
OKI/Sakai Tools
Sakai OKI
Implementations
Sakai APIs
Sakai APIs .vs. OKI APIs
• Identical naming conventions (Agent, ID, Type, Group … )
• Identical logical flow and semantic meaning of those objects
• Sakai APIs will be more “real JAVA”
– Real JAVA iterators
– Real JAVA exception model
• Sakai APIs will also extend where necessary
– “logging in” a user will be standardized
– Updating information will be standardized
– Different APIs will be extended to different amounts
• Sakai APIs will use inversion of control rather than a loader (see
Martin Fowler article)
Programming to OKI APIs in
Sakai
• The OKI OSIDs present in Sakai will be “perfect”
implementations
• They will perform exactly as specified in the OKI
documentation
–
–
–
–
Loader convention
Exception handling
Return types
Semantic conventions
• A programmer will be able to read the OKI spec, and the
Sakai out-of-band-agreement documentation (Types,
Property naming, etc), write code and drop it into Sakai
and it will work without a single line of code changed.
Hibernate
• Evaluated by team led by Lance Speelmon of IU - excellent talk at
recent Sakai architect meeting
• Team is now at training in NYC with the inventor of Hibernate
• Excellent performance (5% slower than raw JDBC)
• Clustering and caching solution
• Little secret: EJB 3.0 is looking like Spring inversion of control and
Hibernate Query Language
• We are go for Hibernate - Should have the jars in Alpha - maybe even
one tiny implementation By Beta will have several OSID
implementations
• IU/Stanford have converted their OKI 1.0RC OSID impls to Hibernate
and are going into production - Yikes - trial by fire :)
uPortal Integration
• Three versions
– Embedded - all of Sakai in a single JSR-168 portlet
(Version 1.0) - Could be integrated into a uPortal 2.3
without modifications
– Injected - uPortal 2.3 navigation is altered to support
hierarchical navigation needed by Sakai. This is a
modified version of uPortal 2.3 where Sakai has “taken
over” much like CHEF and Jetspeed (Version 1.0)
– Integrated - uPortal 3.0 - will look like injected but will
work in unmodified uPortal 3.0 and use uPortal
administration for layout rather than Sakai
administration.
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Upcoming Issues
• Beta Efforts
– Tools and Gaps
– Accessibility
– Modifications to improve performance
• Areas of concern
– Production deployment in JBoss environment - we need
to ramp up an effort on this
– How much work the performance testing and
improvement will actually (taking resources away from
tool building)
Questions