Download - Communications & Middleware Technologies Rensselaer Polytechnic Institute December 5, 2005
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Communications & Middleware TechnologiesRensselaer Polytechnic Institute
December 5, 2005
Bedework 3.0(a.k.a. UWCalendar)
an institute-wide open-source Java events calendar
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Who We Are
Mike Douglass - Senior [email protected]
Arlen Johnson - Web [email protected]
Communications & Middleware TechnologiesDivision of the Chief Information OfficerRensselaer Polytechnic Institute
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Topics
•Overview of Bedework • Recent progress•Demonstration• Future plans
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Overview ofBedework
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Institutional Calendar
An institutional calendar could provide:
• Events publishing
• Personal calendaring
• Group calendaring
• Resource scheduling
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UW Calendar Overview
• Bedework is– a total calendaring and events system– open source– Java (hence platform independent)– modular, extensible, and easily
integrated with other systems– intended for higher education– and…
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UW Calendar Overview
STANDARDS COMPLIANT
– iCal : RFC 2445http://www.ietf.org/rfc/rfc2445.txt
– CalDAV draft version 06http://ietf.webdav.org/caldav
– Why? …interoperability!
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Interoperability
• Calendaring could be like email• Aggregation at client and server• Exchange? Oracle?
– All or nothing vs. modularity– Change from one system to another?
• CalConnect– Oracle, IBM, Mozilla, Yahoo, & Novell
among others; approx. 10 universities
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What’s in a name?
• Bedework:– named after the
Venerable Bede (AD 673-735) – monk & highly influential scholar – in 725 AD wrote treatise: On the
Reckoning of Time
– and a Google search of Bedework, for now, returns only references to this project!
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UW Calendar Overview
• Four main components:• public views• personal views• administrative interface• CalDAV
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UW Calendar Overview
• Features:– Distributed, fine grained administration
• Administrative groups• Location and contacts management
– Access control & sharing– Stand-alone & portlet implementations– True synchronization – Highly customizable look and feel– Deliver to any platform, device, or media
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Core Technologies
• Java / J2EE
• XML, XSLT
• Hibernate
• Again, supportingJSR-168 and CalDAV
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Architecture
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Bedework Back-End
• Modular– Built under a service interface (“service
oriented architecture”)– Implements CalIntf
• Currently have a Hibernate implementation with a local database
• Could have, for example, a CalDav implementation with a remote calendar
• Or both: many implementations simultaneously possible (e.g. Exchange connector)
• This gives us server-side aggregation of calendars
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Portlet Implementation
• JSR-168• Implemented for Jetspeed using the
portal-struts bridge• uPortal version implemented by Satish
Sekharan (Memorial University, Newfoundland)
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Portlet Implementation
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CalDAV Implementation
• Emerging standard • Based on WebDAV• Provides synchronization• Promises flexibility in choice of user
client• Clients and servers being developed by
vendors now: Oracle, Mozilla, Evolution• Outlook OpenConnector for caldav
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Sync Implementation
• Have proof of concept implementation of synchronization using SyncML
• Successfully synchronized with Outlook• Palm is under development
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Bedework Front-End
• XML-based J2EE web applications built in the MVC framework
• Separate business logic from presentation and presentation from content so that each can be developed independently
contentdesignbusinesslogic
MVC
XML
HTMLRSSiCalXML
…
JSPJava XSLT
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$appRoot on web server
Browser: DEFAULT
Browser: …
Browser: Cell
Browser: PDA
Skin Selection
Locale: en_US
Locale: fr_CA
Locale: DEFAULT
Locale: …
viahttp
XSL
skin
XSL
DEFAULT
XSL
skin
skin examples:• xhtml• rss• csv, sql, etc…
• ical, vcal• javascript
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Our Design Approach
• Applications are accessible to regular web designers• XSLT lives in designer’s world• Easy to change look and feel• XSLT files live on the web
“outside” our applicationsand are called over http
• We don’t need to redeploy an application to change its appearance or to deploy a new skin
TemplatesImages
CSS
XSLT
HTML
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ProgressWhat’s been accomplished over
the past year
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Progress
• Switched to Hibernate• Improved RFC compatibility• Extended CalDav support• JSR-168 portlet implementation• Recurrences• Better date / time support• Access control and sharing• Improved user interfaces & added features• New user interfaces
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Progress
• CalConnect participation– participate in interoperability tests – http://www.calconnect.org
• EPFL Switzerlandhave chosen bedework. Jahia will work on development of group calendaring
• Memorial University NewfoundlandProvided skins, worked on uPortal, widgets and OpenLaszlo client.
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Demonstration
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Demonstration
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Future Plans
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Future Plans & Opportunities
• Event notification (alerts)• Emailing of events• Departmental calendars• Group calendaring• Support clustering• Room / resource scheduling
= imminent
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A Final Note
• Major goal:– make product more attractive – ease installation and configuration– encourage adoption and development
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References
bedework.org