ABCSG - Collaboration - 23/02/2006 1 ABCSG Collaboration.

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ABCSGABCSG

CollaborationCollaboration

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TermsTerms

SynchronousSynchronous• Same time, same or different placesSame time, same or different places

AsynchronousAsynchronous• Different times, same or different placesDifferent times, same or different places

Disconnected Disconnected • Same time, different places and no connectionSame time, different places and no connection

CentralizedCentralized• Is executed in a controlled environmentIs executed in a controlled environment

Ad-hocAd-hoc• Is carried out anywhereIs carried out anywhere

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TechnologiesTechnologies

ServerServer• Clients connect through a shared resourceClients connect through a shared resource

P2PP2P• Clients connect directly to each otherClients connect directly to each other

Shared objectsShared objects• Resides on a single hostResides on a single host

Distributed objectsDistributed objects• Resides on multiple hostsResides on multiple hosts

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Technical issues to think about…Technical issues to think about…

Shared objectsShared objects Concurrency controlConcurrency control Late joiningLate joining SecuritySecurity MembershipMembership InvitationsInvitations Synchronous collaborationSynchronous collaboration Asynchronous collaborationAsynchronous collaboration Disconnected collaborationDisconnected collaboration Failure detection / handling / repairingFailure detection / handling / repairing Discovery serviceDiscovery service ScalabilityScalability

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ApplicationsApplications

CVSCVS• Asynchronous collaborationAsynchronous collaboration• (Synchronous collaboration)(Synchronous collaboration)

CoWordCoWord• Synchronous collaborative writingSynchronous collaborative writing• http://reduce.qpsf.edu.au/coword/index.htmlhttp://reduce.qpsf.edu.au/coword/index.html

SubEthaEditSubEthaEdit• Synchronous collaborative writing for macSynchronous collaborative writing for mac• http://www.codingmonkeys.de/subethaedit/http://www.codingmonkeys.de/subethaedit/

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ApplicationsApplications

SpeakeasySpeakeasy• Ad hoc collaborative frameworkAd hoc collaborative framework• Used by the Casca applicationUsed by the Casca application• Shared converspaces for collaborationShared converspaces for collaboration• Allows the sharing of resources (printer/cam/etc.)Allows the sharing of resources (printer/cam/etc.)• Includes several widgets for collaborationIncludes several widgets for collaboration

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ApplicationsApplications

Croquet Croquet 3D collaborative environment3D collaborative environment P2P, but with a joining serverP2P, but with a joining server http://www.opencroquet.org/http://www.opencroquet.org/

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ApplicationsApplications

ABCABC• Synchronous / asynchronous / (disconnected)Synchronous / asynchronous / (disconnected)• Central / P2PCentral / P2P

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What are we doing now?What are we doing now?

Enabling ABC to supportEnabling ABC to support• Central collaboration using a server and P2PCentral collaboration using a server and P2P• Ad hoc collaboration using DOLCLANAd hoc collaboration using DOLCLAN• Hybrid collaborationHybrid collaboration

Distributed Application

Peer 1 Peer 2 Peer 3

Distributed Model

Application Logic Application Logic Application Logic

ObjectObject

Object Object

Object

Object

P2P

CENTRALIZED

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Things to discuss…Things to discuss…

What do a collaborative system need?What do a collaborative system need? How do you evaluate them?How do you evaluate them? Functional requirements?Functional requirements? Nonfunctional requirements?Nonfunctional requirements? Awareness widgets?Awareness widgets? OS / Data / Application integration?OS / Data / Application integration?