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Semelhante a Leveraging Sakai and LTI to Standardize Integrations
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Leveraging Sakai and LTI to Standardize Integrations
- 1. Leveraging Sakai and IMS LTI to Standardize Integrations Presented By Gary Gilbert, Unicon Fred Tibbitts, Pearson Education July 9, 2009 Pearson Copyright 2009
- 2. Overview • The Challenge • Pearson Education’s Solution • Leveraging LTI • Sakai as Reference Implementation • Demo • Q & A Pearson Copyright 2009
- 3. The Challenge Pearson Copyright 2009
- 4. The Challenge • Custom integration solutions – Usability – Reinvented for each LMS / learning application – Brittle – Minimal reuse – High cost of ownership – Lack of content portability Pearson Copyright 2009
- 5. What is TPI? • “Third-Party Interoperability” • TPI is a gateway that allows external applications to integrate seamlessly with Pearson applications • External LMS embeds links to TPI in course content • TPI mediates the request before redirecting to the Pearson learning application Pearson Copyright 2009
- 6. TPI’s Main Responsibilities • Handle tool launch (i.e. application linking) requests • Orchestrate enterprise data exchange – Users, courses, enrollments • Seamless SSO Pearson Copyright 2009
- 7. TPI Design Principles • Be flexible – enable partner and Pearson application integrations with minimal effort • Lightweight – don't include or develop components we don't need • Support/leverage industry standards when appropriate • Highly scalable and fault tolerant Pearson Copyright 2009
- 8. TPI Server • Java-based web application • Red Hat Enterprise servers • Oracle RAC • TPI is based largely on open source software Pearson Copyright 2009
- 9. What is IMS LTI? A standard method of integrating learning tools with learning management systems Pearson Copyright 2009
- 10. Why LTI in TPI? • Expand support for standards • Economies of Scale – Single provider for many tools • LTI addresses features such as automated tool deployment Pearson Copyright 2009
- 11. LTI Overview • “Learning Tool Interoperability” • Version 2.0 (Not Final) • Working Group includes: – Pearson Education – Sakai – IBM – Microsoft – Blackboard – Wimba – Others Pearson Copyright 2009
- 12. LTI Objectives • Define a deployment framework • Standardize process for building links • Guarantee secure communication • Provide a tool launch protocol that preserves learning context • Supports content development and distribution Pearson Copyright 2009
- 13. Key Concepts • Tool Consumer • Tool Provider • Tool Profile • Messaging Framework • Link Types Pearson Copyright 2009
- 15. Tool Consumer • Publishes a Tool Consumer Profile • Provides Tool Consumer Runtime • Exposes LTI Services Pearson Copyright 2009
- 16. Tool Consumer Profile • XML descriptor of the Tool Consumer's supported LTI functionality • Read by Tool Provider during deployment Tool Consumer Profile Tool Consumer Vendor Metadata Information Capabilities List List of supported Security Profiles Web Services Pearson Copyright 2009
- 17. Tool Provider • Learning application that runs in a container separate from the LMS • Publishes one or more tools via Tool Profiles – Tool is an HTTP-based application that serves content Pearson Copyright 2009
- 18. Tool Profile • XML descriptor describing how a tool integrates with a Tool Consumer • Delivered to the Tool Consumer during tool deployment Tool Profile Tool Vendor Metadata Information Resource Event Handlers Handlers Menu Outcome Links Handlers Pearson Copyright 2009
- 19. Messaging Framework Pearson Copyright 2009
- 20. Message Types • Tool Deployment Request • Tool Launch Request – Menu view request – Resource view request – Resource create/modify/delete requests • Server-to-Server Pearson Copyright 2009
- 21. Link Types • Menu Links – Rendered in navigational element – Defined in the Tool Profile • Resource Links – Rendered anywhere they are supported by the Tool Consumer Runtime – Authored Pearson Copyright 2009
- 22. Key Interactions • Tool Deployment • Tool Launch • Resource Link Authoring Pearson Copyright 2009
- 23. Tool Deployment • A handshake between the Tool Provider and Tool Consumer where they exchange profiles • Initiated by an administrator on the Tool Consumer side • Uses RegisterTool web service Pearson Copyright 2009
- 24. User Agent Tool Consumer Tool Provider Submit Deployment URL Send HTML Form Auto-submit Post (toolConsumerProfileURL, passwd, returnURL) Get Profile Validate profile Collect information Submit registerTool(ToolProfile, ToolSettings, SecurityContract) Send Redirect
- 25. Tool Launch • Initiated by a user on the Tool Consumer • Tool Consumer Runtime generates HTML Form (POST) that is auto-submitted • POST to appropriate Message Handler on the Tool Provider Pearson Copyright 2009
- 26. <form id="launchRequestForm" name="launchRequestForm" enctype="application/x- www-form-urlencoded" action="http://someserver.com/lti/launch" method="post"> <input name="userId" value="admin" type="hidden"/> <input name="contextId" value="fb2720f7-bc89-4c15-9d11-f959be22835c" d type="hidden"/> Standar <input name="contextType" value="ims/lis/CourseSection" type="hidden"/> <input name="toolInstanceGUID" value="448c77e6-3d01-4f6a-97d2-5316fb472ee4" type="hidden"/> <input name="timestamp" value="1238096397997" type="hidden"/> <input name="mac" value="9sba5G5oEOoAKtJuRLHtzhqtZr0=" type="hidden"/> Security <input name="nonce" value="-2714224520731310511" type="hidden"/> <input name="digest-algorithm" value="HmacSHA1" type="hidden"/> <input name="system_institutionId" value="unicon" type="hidden"/> System <input name="system_partnerId" value="sakai" type="hidden"/> Context <input name="context_book" value="campbell8" type="hidden"/> ce Resour <input name="resource_targetId" value="studyplan" type="hidden"/> <input value="Submit" type="submit"/> </form> Pearson Copyright 2009
- 27. Resource Link Authoring • Initiated by user on the Tool Consumer • Tool Provider provides authoring UI • Uses ResourceLink web service Pearson Copyright 2009
- 28. User Agent Tool Consumer Tool Provider Initiate Link Creation Send HTML Form Post [resource-create] Collect information Submit saveResource Send Redirect Show new resource
- 29. Sakai as Reference Implementation Pearson Copyright 2009
- 30. LTI in Sakai • Tool Consumer • Test harness for TPI Tool Provider • Reference implementation Pearson Copyright 2009
- 31. Sakai Tool Consumer Runtime • New Sakai Tool (lti.tool.consumer) – Reasonable Server Faces • Tool Deployment • Tool Launch – Integration with Sakai Resources Tool • Resource Link Authoring – Heavy use of Entity Providers Pearson Copyright 2009
- 32. Sakai LTI Services • Standard Sakai API / IMPL Model • Spring Web Services – IMS Enterprise Services v1.1 – RegisterTool – ResourceLink – ToolSetting Pearson Copyright 2009
- 33. Sakai LTI Authoring • Pearson Scripted Links – Extension to the LTI spec – Allows direct authoring of links • Requires Melete – Minor changes to Melete to support LTI tool launch via JavaScript Pearson Copyright 2009
- 34. Sakai in LTI – What's left? • Tool Deployment at the System level • Tighter integration with Sakai Resources • You tell us Pearson Copyright 2009
- 36. Q&A Gary Gilbert, Unicon ggilbert@unicon.net Fred Tibbitts, Pearson Education fred.tibbitts@pearson.com Pearson Copyright 2009