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Dr. Frank PadbergUniversity of Karlsruhe &

University of Clausthal

Rotor RFP2 Workshop 2005

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Original Idea

SoDA = Source Documentation Archive use the Internet to allow users to attach

textual comments to an existing source file tree

all users can see new comments (newsticker-like)

support the Rotor research community

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FreeSoDA

store any kind of document, not only code and comments

offer Web services for accessing the document database

use a rich client seamlessly notify clients about changes

in the database

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Hello, Rotor World!

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Important Features

allow users to create links between semantically related documents

allow for filtering of what is shown on the screen (views and styles)

offer root documents for navigation protect documents against deletion and

overwriting

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Adding Docs and Links (1)

drag ‘n‘

drop...

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Adding Docs and Links (2)

...and then specify the attributes

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An "Articles-Only" View

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Services for Normal Users

logon/logoff for a project open/close a view insert/delete a document/link edit a link/document description download a document trigger a refresh ("view update")

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Connecting to the Server

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Downloading a Document

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Services for Administrators

create/delete users create projects define user groups and assign roles define document/link types define views

all administrative tasks can be easily performed via the client

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Managing the System

must be FreeSoDA administrator to see this

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Technical Problems

need sessions and transactions, but SOAP is stateless

need notification scheme need caching to get performance need ability to add file trees need useful layout algorithms

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Solutions

define FreeSoDA message format store all state in SQL database mimic observer design pattern two-level caching scheme in the server;

caching in the client; transmit deltas external archives "cycle" layouter; "spring" layouter

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Notifications

can't use client-based Web services: this would require running a Web server on each client

the server notifies the client by sending a message to a client TCP port

this TCP port is made known to the server when establishing the session

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Listening for Notifications

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Adding External Archives

must be project manager to add archives

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Randomized Layouts (1)

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Randomized Layouts (2)

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Cycle Layouts

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Deeper Cycle Layouts

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More Things Ahead

add searching and bookmarks write proxy server for browser access study and enhance the client usability implement server replication host Microsoft Rotor

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Check It Out Yourself...

the official FreeSoDA web page & client download:http://freesoda.ipd.uni-karlsruhe.de

RCD guest login:server http://freesoda.ipd.uni-karlsruhe.de/freesodausername guest and password guest

get a regular RCD account:send mail to padberg@ira.uka.de

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Please help us populate the

Rotor Community Database

RCD !

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END